Fixed error on whiteboard view and login redirection

Bugfixes

.dockerignore

@@ -0,0 +1,29 @@
+.git
+.gitignore
+
+# IDE
+.idea
+.vs
+.vscode
+**/.idea
+
+# Build artifacts
+**/bin
+**/obj
+front/node_modules
+front/dist
+
+# Documentation
+Docs/
+
+# Dev files
+docker/
+*.sh
+
+# Env files (secrets must not be in the image)
+.env
+deploy/.env
+
+# Misc
+**/*.user
+**/*.DotSettings.user

Docs/dijagrami/communcation_components

@@ -0,0 +1,76 @@
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+        <mxCell id="1" parent="0" />
+        <mxCell id="9ORZMBqL03SGZpvbqk50-10" parent="1" style="rounded=0;whiteSpace=wrap;html=1;" value="AipsWebApi" vertex="1">
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+        </mxCell>
+        <mxCell id="9ORZMBqL03SGZpvbqk50-11" parent="1" style="rounded=0;whiteSpace=wrap;html=1;fillColor=#f8cecc;strokeColor=#b85450;" value="AipsRT" vertex="1">
+          <mxGeometry height="60" width="120" x="190" y="170" as="geometry" />
+        </mxCell>
+        <mxCell id="9ORZMBqL03SGZpvbqk50-12" parent="1" style="rounded=1;whiteSpace=wrap;html=1;fillColor=#fff2cc;strokeColor=#d6b656;" value="RabbitMQ" vertex="1">
+          <mxGeometry height="60" width="120" x="190" y="310" as="geometry" />
+        </mxCell>
+        <mxCell id="9ORZMBqL03SGZpvbqk50-13" parent="1" style="rounded=0;whiteSpace=wrap;html=1;fontStyle=4;fillColor=#f8cecc;strokeColor=#b85450;" value="AipsWorker" vertex="1">
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+        </mxCell>
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+            <mxPoint x="440" y="330" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="9ORZMBqL03SGZpvbqk50-23" edge="1" parent="1" source="9ORZMBqL03SGZpvbqk50-12" style="endArrow=classic;html=1;rounded=0;exitX=0.75;exitY=0;exitDx=0;exitDy=0;entryX=0.75;entryY=1;entryDx=0;entryDy=0;" target="9ORZMBqL03SGZpvbqk50-11" value="">
+          <mxGeometry height="50" relative="1" width="50" as="geometry">
+            <mxPoint x="390" y="380" as="sourcePoint" />
+            <mxPoint x="440" y="330" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="9ORZMBqL03SGZpvbqk50-25" parent="1" style="rounded=0;whiteSpace=wrap;html=1;" value="Klient" vertex="1">
+          <mxGeometry height="70" width="420" x="190" y="-40" as="geometry" />
+        </mxCell>
+        <mxCell id="9ORZMBqL03SGZpvbqk50-27" edge="1" parent="1" source="9ORZMBqL03SGZpvbqk50-11" style="endArrow=classic;startArrow=classic;html=1;rounded=0;exitX=0.5;exitY=0;exitDx=0;exitDy=0;entryX=0.142;entryY=1.015;entryDx=0;entryDy=0;entryPerimeter=0;" target="9ORZMBqL03SGZpvbqk50-25" value="">
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+        </mxCell>
+        <mxCell id="9ORZMBqL03SGZpvbqk50-28" edge="1" parent="1" source="9ORZMBqL03SGZpvbqk50-10" style="endArrow=classic;startArrow=classic;html=1;rounded=0;exitX=0.5;exitY=0;exitDx=0;exitDy=0;" value="">
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+          </mxGeometry>
+        </mxCell>
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>

Docs/dijagrami/implementacija.drawio

@@ -0,0 +1,150 @@
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+  <diagram name="Page-1" id="IZF_J8x8XDGuG-dahjO2">
+    <mxGraphModel dx="1040" dy="620" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
+      <root>
+        <mxCell id="0" />
+        <mxCell id="1" parent="0" />
+        <mxCell id="KJVqxsW90z-SvCUaH26X-66" parent="1" style="rounded=0;whiteSpace=wrap;html=1;fillColor=#dae8fc;strokeColor=#6c8ebf;" value="" vertex="1">
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+        </mxCell>
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+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-41" parent="KJVqxsW90z-SvCUaH26X-38" style="text;strokeColor=#666666;fillColor=#f5f5f5;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;whiteSpace=wrap;html=1;fontColor=#333333;" value="+ CreateChannel(): IChannel&lt;div&gt;- CreateConnection()&lt;/div&gt;&lt;div&gt;-&amp;nbsp;CreateConnectionFactory()&lt;/div&gt;" vertex="1">
+          <mxGeometry height="70" width="230" y="70" as="geometry" />
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-49" edge="1" parent="1" source="KJVqxsW90z-SvCUaH26X-38" style="endArrow=block;dashed=1;endFill=0;endSize=12;html=1;rounded=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;fillColor=#f5f5f5;strokeColor=#666666;exitX=0.5;exitY=1;exitDx=0;exitDy=0;" target="KJVqxsW90z-SvCUaH26X-32" value="">
+          <mxGeometry relative="1" width="160" as="geometry">
+            <mxPoint x="370" y="-190" as="sourcePoint" />
+            <mxPoint x="600" y="470" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-51" parent="1" style="swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=26;horizontalStack=0;resizeParent=1;resizeParentMax=0;resizeLast=0;collapsible=1;marginBottom=0;whiteSpace=wrap;html=1;fillColor=#f5f5f5;fontColor=#333333;strokeColor=#666666;" value="MoveShapeMessage" vertex="1">
+          <mxGeometry height="52" width="140" x="210" y="990" as="geometry" />
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-52" parent="KJVqxsW90z-SvCUaH26X-51" style="text;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;whiteSpace=wrap;html=1;fillColor=#f5f5f5;fontColor=#333333;strokeColor=#666666;" value="+ ..." vertex="1">
+          <mxGeometry height="26" width="140" y="26" as="geometry" />
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-60" parent="1" style="swimlane;fontStyle=0;childLayout=stackLayout;horizontal=1;startSize=26;horizontalStack=0;resizeParent=1;resizeParentMax=0;resizeLast=0;collapsible=1;marginBottom=0;whiteSpace=wrap;html=1;fillColor=#f5f5f5;fontColor=#333333;strokeColor=#666666;" value="AddRectangleMessage" vertex="1">
+          <mxGeometry height="52" width="156" x="414" y="990" as="geometry" />
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-61" parent="KJVqxsW90z-SvCUaH26X-60" style="text;align=left;verticalAlign=top;spacingLeft=4;spacingRight=4;overflow=hidden;rotatable=0;points=[[0,0.5],[1,0.5]];portConstraint=eastwest;whiteSpace=wrap;html=1;fillColor=#f5f5f5;fontColor=#333333;strokeColor=#666666;" value="+ ..." vertex="1">
+          <mxGeometry height="26" width="156" y="26" as="geometry" />
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-62" edge="1" parent="1" source="KJVqxsW90z-SvCUaH26X-51" style="endArrow=block;dashed=1;endFill=0;endSize=12;html=1;rounded=0;exitX=0.75;exitY=0;exitDx=0;exitDy=0;entryX=0.25;entryY=1;entryDx=0;entryDy=0;fillColor=#f5f5f5;strokeColor=#666666;" target="KJVqxsW90z-SvCUaH26X-15" value="">
+          <mxGeometry relative="1" width="160" as="geometry">
+            <mxPoint x="350" y="936" as="sourcePoint" />
+            <mxPoint x="273.5" y="1026" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-63" edge="1" parent="1" source="KJVqxsW90z-SvCUaH26X-60" style="endArrow=block;dashed=1;endFill=0;endSize=12;html=1;rounded=0;entryX=0.75;entryY=1;entryDx=0;entryDy=0;fillColor=#f5f5f5;strokeColor=#666666;exitX=0.25;exitY=0;exitDx=0;exitDy=0;" target="KJVqxsW90z-SvCUaH26X-15" value="">
+          <mxGeometry relative="1" width="160" as="geometry">
+            <mxPoint x="603" y="76" as="sourcePoint" />
+            <mxPoint x="600" y="-44" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-64" parent="1" style="text;html=1;whiteSpace=wrap;align=center;verticalAlign=middle;rounded=0;" value="&lt;font style=&quot;font-size: 22px;&quot;&gt;...&lt;/font&gt;" vertex="1">
+          <mxGeometry height="30" width="60" x="354" y="996" as="geometry" />
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-67" parent="1" style="text;html=1;whiteSpace=wrap;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;rounded=0;fontSize=16;" value="Application Layer" vertex="1">
+          <mxGeometry height="30" width="125" x="321.5" y="600" as="geometry" />
+        </mxCell>
+        <mxCell id="KJVqxsW90z-SvCUaH26X-68" parent="1" style="text;html=1;whiteSpace=wrap;strokeColor=none;fillColor=none;align=center;verticalAlign=middle;rounded=0;fontSize=16;" value="Infrastructure Layer" vertex="1">
+          <mxGeometry height="30" width="180" x="295" y="570" as="geometry" />
+        </mxCell>
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>

deploy/.env.example

@@ -0,0 +1,17 @@
+# PostgreSQL (shared VPS instance — create DB/user manually)
+POSTGRES_DB=aips_db
+POSTGRES_USER=aips_user
+POSTGRES_PASSWORD=CHANGE_ME_strong_password_here
+
+# RabbitMQ
+RABBITMQ_DEFAULT_USER=aips_rabbit
+RABBITMQ_DEFAULT_PASS=CHANGE_ME_rabbit_password
+RABBITMQ_DEFAULT_VHOST=/
+RABBITMQ_EXCHANGE=aips
+
+# JWT
+JWT_ISSUER=AIPS
+JWT_AUDIENCE=AIPSWebApi
+JWT_KEY=CHANGE_ME_generate_a_64_char_random_string_here
+JWT_EXPIRATION_MINUTES=60
+JWT_REFRESH_TOKEN_EXPIRATION_DAYS=7

deploy/Dockerfile.front

@@ -0,0 +1,14 @@
+FROM oven/bun:1 AS build
+WORKDIR /app
+
+COPY front/package.json front/bun.lock ./
+RUN bun install --frozen-lockfile
+
+COPY front/ .
+RUN bun run build-only
+
+FROM nginx:alpine
+RUN rm /etc/nginx/conf.d/default.conf
+COPY deploy/nginx/nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/dist /usr/share/nginx/html
+EXPOSE 80

deploy/Dockerfile.rt

@@ -0,0 +1,23 @@
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
+WORKDIR /src
+
+COPY dotnet/dotnet.sln dotnet/dotnet.sln
+COPY dotnet/AipsCore/AipsCore.csproj dotnet/AipsCore/
+COPY dotnet/AipsWebApi/AipsWebApi.csproj dotnet/AipsWebApi/
+COPY dotnet/AipsRT/AipsRT.csproj dotnet/AipsRT/
+COPY dotnet/AipsWorker/AipsWorker.csproj dotnet/AipsWorker/
+
+WORKDIR /src/dotnet
+RUN dotnet restore dotnet.sln
+
+WORKDIR /src
+COPY dotnet/ dotnet/
+
+WORKDIR /src/dotnet
+RUN dotnet publish AipsRT/AipsRT.csproj -c Release -o /app/publish --no-restore
+
+FROM mcr.microsoft.com/dotnet/aspnet:10.0
+WORKDIR /app
+COPY --from=build /app/publish .
+EXPOSE 8080
+ENTRYPOINT ["dotnet", "AipsRT.dll"]

deploy/Dockerfile.webapi

@@ -0,0 +1,23 @@
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
+WORKDIR /src
+
+COPY dotnet/dotnet.sln dotnet/dotnet.sln
+COPY dotnet/AipsCore/AipsCore.csproj dotnet/AipsCore/
+COPY dotnet/AipsWebApi/AipsWebApi.csproj dotnet/AipsWebApi/
+COPY dotnet/AipsRT/AipsRT.csproj dotnet/AipsRT/
+COPY dotnet/AipsWorker/AipsWorker.csproj dotnet/AipsWorker/
+
+WORKDIR /src/dotnet
+RUN dotnet restore dotnet.sln
+
+WORKDIR /src
+COPY dotnet/ dotnet/
+
+WORKDIR /src/dotnet
+RUN dotnet publish AipsWebApi/AipsWebApi.csproj -c Release -o /app/publish --no-restore
+
+FROM mcr.microsoft.com/dotnet/aspnet:10.0
+WORKDIR /app
+COPY --from=build /app/publish .
+EXPOSE 8080
+ENTRYPOINT ["dotnet", "AipsWebApi.dll"]

deploy/Dockerfile.worker

@@ -0,0 +1,22 @@
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
+WORKDIR /src
+
+COPY dotnet/dotnet.sln dotnet/dotnet.sln
+COPY dotnet/AipsCore/AipsCore.csproj dotnet/AipsCore/
+COPY dotnet/AipsWebApi/AipsWebApi.csproj dotnet/AipsWebApi/
+COPY dotnet/AipsRT/AipsRT.csproj dotnet/AipsRT/
+COPY dotnet/AipsWorker/AipsWorker.csproj dotnet/AipsWorker/
+
+WORKDIR /src/dotnet
+RUN dotnet restore dotnet.sln
+
+WORKDIR /src
+COPY dotnet/ dotnet/
+
+WORKDIR /src/dotnet
+RUN dotnet publish AipsWorker/AipsWorker.csproj -c Release -o /app/publish --no-restore
+
+FROM mcr.microsoft.com/dotnet/aspnet:10.0
+WORKDIR /app
+COPY --from=build /app/publish .
+ENTRYPOINT ["dotnet", "AipsWorker.dll"]

deploy/docker-compose.yml

@@ -0,0 +1,103 @@
+services:
+  rabbitmq:
+    image: rabbitmq:3-management
+    container_name: aips-rabbitmq
+    restart: unless-stopped
+    environment:
+      RABBITMQ_DEFAULT_USER: ${RABBITMQ_DEFAULT_USER}
+      RABBITMQ_DEFAULT_PASS: ${RABBITMQ_DEFAULT_PASS}
+      RABBITMQ_DEFAULT_VHOST: ${RABBITMQ_DEFAULT_VHOST}
+    volumes:
+      - rabbitmqdata:/var/lib/rabbitmq
+    healthcheck:
+      test: ["CMD", "rabbitmq-diagnostics", "-q", "ping"]
+      interval: 10s
+      timeout: 10s
+      retries: 5
+
+  webapi:
+    build:
+      context: ..
+      dockerfile: deploy/Dockerfile.webapi
+    container_name: aips-webapi
+    restart: unless-stopped
+    environment:
+      ASPNETCORE_URLS: "http://+:8080"
+      ASPNETCORE_ENVIRONMENT: "Production"
+      DB_CONN_STRING: "Host=postgres;Port=5432;Database=${POSTGRES_DB};Username=${POSTGRES_USER};Password=${POSTGRES_PASSWORD}"
+      RABBITMQ_AMQP_URI: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@rabbitmq:5672/${RABBITMQ_DEFAULT_VHOST}"
+      RABBITMQ_EXCHANGE: "${RABBITMQ_EXCHANGE}"
+      JWT_ISSUER: "${JWT_ISSUER}"
+      JWT_AUDIENCE: "${JWT_AUDIENCE}"
+      JWT_KEY: "${JWT_KEY}"
+      JWT_EXPIRATION_MINUTES: "${JWT_EXPIRATION_MINUTES}"
+      JWT_REFRESH_TOKEN_EXPIRATION_DAYS: "${JWT_REFRESH_TOKEN_EXPIRATION_DAYS}"
+    networks:
+      - default
+      - back_network
+    depends_on:
+      rabbitmq:
+        condition: service_healthy
+
+  rt:
+    build:
+      context: ..
+      dockerfile: deploy/Dockerfile.rt
+    container_name: aips-rt
+    restart: unless-stopped
+    environment:
+      ASPNETCORE_URLS: "http://+:8080"
+      ASPNETCORE_ENVIRONMENT: "Production"
+      DB_CONN_STRING: "Host=postgres;Port=5432;Database=${POSTGRES_DB};Username=${POSTGRES_USER};Password=${POSTGRES_PASSWORD}"
+      RABBITMQ_AMQP_URI: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@rabbitmq:5672/${RABBITMQ_DEFAULT_VHOST}"
+      RABBITMQ_EXCHANGE: "${RABBITMQ_EXCHANGE}"
+      JWT_ISSUER: "${JWT_ISSUER}"
+      JWT_AUDIENCE: "${JWT_AUDIENCE}"
+      JWT_KEY: "${JWT_KEY}"
+      JWT_EXPIRATION_MINUTES: "${JWT_EXPIRATION_MINUTES}"
+      JWT_REFRESH_TOKEN_EXPIRATION_DAYS: "${JWT_REFRESH_TOKEN_EXPIRATION_DAYS}"
+    networks:
+      - default
+      - back_network
+    depends_on:
+      rabbitmq:
+        condition: service_healthy
+
+  worker:
+    build:
+      context: ..
+      dockerfile: deploy/Dockerfile.worker
+    container_name: aips-worker
+    restart: unless-stopped
+    environment:
+      DB_CONN_STRING: "Host=postgres;Port=5432;Database=${POSTGRES_DB};Username=${POSTGRES_USER};Password=${POSTGRES_PASSWORD}"
+      RABBITMQ_AMQP_URI: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@rabbitmq:5672/${RABBITMQ_DEFAULT_VHOST}"
+      RABBITMQ_EXCHANGE: "${RABBITMQ_EXCHANGE}"
+      JWT_ISSUER: "${JWT_ISSUER}"
+      JWT_AUDIENCE: "${JWT_AUDIENCE}"
+      JWT_KEY: "${JWT_KEY}"
+    networks:
+      - default
+      - back_network
+    depends_on:
+      rabbitmq:
+        condition: service_healthy
+
+  nginx:
+    build:
+      context: ..
+      dockerfile: deploy/Dockerfile.front
+    container_name: aips-nginx
+    restart: unless-stopped
+    ports:
+      - "8090:80"
+    depends_on:
+      - webapi
+      - rt
+
+networks:
+  back_network:
+    external: true
+
+volumes:
+  rabbitmqdata:

deploy/nginx/aips-global.conf

@@ -0,0 +1,45 @@
+server {
+    listen 80;
+    server_name aips.stewki.com;
+
+    location /.well-known/acme-challenge/ {
+        root /var/www/certbot;
+    }
+
+    location / {
+        return 301 https://$host$request_uri;
+    }
+}
+
+server {
+    listen 443 ssl;
+    server_name aips.stewki.com;
+
+    ssl_certificate     /etc/letsencrypt/live/aips.stewki.com/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/aips.stewki.com/privkey.pem;
+
+    client_max_body_size 10M;
+
+    location / {
+        proxy_pass http://host.docker.internal:8090;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    location /hubs/ {
+        proxy_pass http://host.docker.internal:8090;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+
+        proxy_read_timeout 86400s;
+        proxy_send_timeout 86400s;
+    }
+}

deploy/nginx/nginx.conf

@@ -0,0 +1,46 @@
+upstream webapi {
+    server webapi:8080;
+}
+
+upstream rt {
+    server rt:8080;
+}
+
+server {
+    listen 80;
+    server_name _;
+
+    client_max_body_size 10M;
+
+    # REST API
+    location /api/ {
+        proxy_pass http://webapi;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    # SignalR hubs (WebSocket support)
+    location /hubs/ {
+        proxy_pass http://rt;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+
+        proxy_read_timeout 86400s;
+        proxy_send_timeout 86400s;
+    }
+
+    # Vue SPA
+    location / {
+        root /usr/share/nginx/html;
+        index index.html;
+        try_files $uri $uri/ /index.html;
+    }
+}

dos-start-back.bat

@@ -0,0 +1,27 @@
+<# : batch portion
+@echo off
+set "SCRIPT_DIR=%~dp0"
+powershell -ExecutionPolicy Bypass "iex((Get-Content '%~f0' -Raw))"
+exit /b
+#>
+
+Set-Location (Join-Path $env:SCRIPT_DIR "dotnet")
+
+$jobs = @()
+$jobs += Start-Job -ScriptBlock { Set-Location $using:PWD; dotnet run --project AipsWebApi 2>&1 | ForEach-Object { "[WebApi]  $_" } }
+$jobs += Start-Job -ScriptBlock { Set-Location $using:PWD; dotnet run --project AipsRT 2>&1 | ForEach-Object { "[RT]     $_" } }
+$jobs += Start-Job -ScriptBlock { Set-Location $using:PWD; dotnet run --project AipsWorker 2>&1 | ForEach-Object { "[Worker] $_" } }
+
+try {
+    while ($jobs | Where-Object { $_.State -eq 'Running' }) {
+        foreach ($job in $jobs) {
+            Receive-Job -Job $job
+        }
+        Start-Sleep -Milliseconds 200
+    }
+    foreach ($job in $jobs) {
+        Receive-Job -Job $job
+    }
+} finally {
+    $jobs | Stop-Job -PassThru | Remove-Job
+}

dos-start-front.bat

@@ -0,0 +1,4 @@
+@echo off
+cd /d "%~dp0front"
+
+bun dev

dos-start-infra.bat

@@ -0,0 +1,4 @@
+@echo off
+cd /d "%~dp0docker"
+
+docker compose -p aips --env-file ..\.env up

dotnet/AipsCore/AipsCore.csproj

@@ -21,7 +21,6 @@
 
     <ItemGroup>
       <Folder Include="Application\Models\Shape\Command\DeleteShape\" />
-      <Folder Include="Domain\Models\WhiteboardMembership\Validation\" />
       <Folder Include="Infrastructure\Persistence\Db\Migrations\" />
     </ItemGroup>
 

dotnet/AipsCore/Application/Abstract/IWhiteboardAwareContext.cs

@@ -0,0 +1,6 @@
+namespace AipsCore.Application.Abstract;
+
+public interface IWhiteboardAwareContext
+{
+    Guid GetWhiteboardId();
+}

dotnet/AipsCore/Application/Abstract/MessageBroking/IMessageTypesProvider.cs

@@ -0,0 +1,6 @@
+namespace AipsCore.Application.Abstract.MessageBroking;
+
+public interface IMessageTypesProvider
+{
+    ICollection<Type> GetAllMessageTypes();
+}

dotnet/AipsCore/Application/Abstract/MessageBroking/MessageTag.cs

@@ -1,7 +0,0 @@
-namespace AipsCore.Application.Abstract.MessageBroking;
-
-public enum MessageTag
-{
-    Worker,
-    RT
-}

dotnet/AipsCore/Application/Common/Message/AcceptUserRequestToJoin/AcceptUserRequestToJoinMessage.cs

@@ -0,0 +1,6 @@
+using AipsCore.Application.Abstract.MessageBroking;
+using AipsCore.Application.Models.Whiteboard.Command.AcceptUserRequestToJoin;
+
+namespace AipsCore.Application.Common.Message.AcceptUserRequestToJoin;
+
+public record AcceptUserRequestToJoinMessage(AcceptUserRequestToJoinCommand Command) : IMessage;

dotnet/AipsCore/Application/Common/Message/AcceptUserRequestToJoin/AcceptUserRequestToJoinMessageHandler.cs

@@ -0,0 +1,19 @@
+using AipsCore.Application.Abstract;
+using AipsCore.Application.Abstract.MessageBroking;
+
+namespace AipsCore.Application.Common.Message.AcceptUserRequestToJoin;
+
+public class AcceptUserRequestToJoinMessageHandler : IMessageHandler<AcceptUserRequestToJoinMessage>
+{
+    private readonly IDispatcher _dispatcher;
+
+    public AcceptUserRequestToJoinMessageHandler(IDispatcher dispatcher)
+    {
+        _dispatcher = dispatcher;
+    }
+
+    public async Task Handle(AcceptUserRequestToJoinMessage message, CancellationToken cancellationToken)
+    {
+        await _dispatcher.Execute(message.Command, cancellationToken);
+    }
+}

dotnet/AipsCore/Application/Common/Message/AddArrow/AddArrowMessage.cs

@@ -1,6 +1,13 @@
+using AipsCore.Application.Abstract;
 using AipsCore.Application.Abstract.MessageBroking;
 using AipsCore.Application.Models.Shape.Command.CreateArrow;
 
 namespace AipsCore.Application.Common.Message.AddArrow;
 
-public record AddArrowMessage(CreateArrowCommand Command) : IMessage;
+public record AddArrowMessage(CreateArrowCommand Command) : IMessage, IWhiteboardAwareContext
+{
+    public Guid GetWhiteboardId()
+    {
+        return Guid.Parse(Command.WhiteboardId);
+    }
+}

dotnet/AipsCore/Application/Common/Message/AddLine/AddLineMessage.cs

@@ -1,6 +1,13 @@
+using AipsCore.Application.Abstract;
 using AipsCore.Application.Abstract.MessageBroking;
 using AipsCore.Application.Models.Shape.Command.CreateLine;
 
 namespace AipsCore.Application.Common.Message.AddLine;
 
-public record AddLineMessage(CreateLineCommand Command) : IMessage;
+public record AddLineMessage(CreateLineCommand Command) : IMessage, IWhiteboardAwareContext
+{
+    public Guid GetWhiteboardId()
+    {
+        return Guid.Parse(Command.WhiteboardId);
+    }
+}

dotnet/AipsCore/Application/Common/Message/AddRectangle/AddRectangleMessage.cs

@@ -1,6 +1,13 @@
+using AipsCore.Application.Abstract;
 using AipsCore.Application.Abstract.MessageBroking;
 using AipsCore.Application.Models.Shape.Command.CreateRectangle;
 
 namespace AipsCore.Application.Common.Message.AddRectangle;
 
-public record AddRectangleMessage(CreateRectangleCommand Command) : IMessage;
+public record AddRectangleMessage(CreateRectangleCommand Command) : IMessage, IWhiteboardAwareContext
+{
+    public Guid GetWhiteboardId()
+    {
+        return Guid.Parse(Command.WhiteboardId);
+    }
+}

dotnet/AipsCore/Application/Common/Message/AddTextShape/AddTextShapeMessage.cs

@@ -1,6 +1,13 @@
+using AipsCore.Application.Abstract;
 using AipsCore.Application.Abstract.MessageBroking;
 using AipsCore.Application.Models.Shape.Command.CreateTextShape;
 
 namespace AipsCore.Application.Common.Message.AddTextShape;
 
-public record AddTextShapeMessage(CreateTextShapeCommand Command) : IMessage;
+public record AddTextShapeMessage(CreateTextShapeCommand Command) : IMessage, IWhiteboardAwareContext
+{
+    public Guid GetWhiteboardId()
+    {
+        return Guid.Parse(Command.WhiteboardId);
+    }
+}

dotnet/AipsCore/Application/Common/Message/ErrorMessage/ErrorMessage.cs

@@ -0,0 +1,13 @@
+using AipsCore.Application.Abstract;
+using AipsCore.Application.Abstract.MessageBroking;
+using AipsCore.Domain.Common.Validation;
+
+namespace AipsCore.Application.Common.Message.ErrorMessage;
+
+public record ErrorMessage(Guid WhiteboardId, ICollection<ValidationError> Errors) : IMessage, IWhiteboardAwareContext
+{
+    public Guid GetWhiteboardId()
+    {
+        return WhiteboardId;
+    }
+}

dotnet/AipsCore/Application/Common/Message/ErrorMessage/ErrorMessageHandler.cs

@@ -0,0 +1,18 @@
+using AipsCore.Application.Abstract.MessageBroking;
+
+namespace AipsCore.Application.Common.Message.ErrorMessage;
+
+public class ErrorMessageHandler : IMessageHandler<ErrorMessage>
+{
+    private readonly IErrorMessageHandleStrategy _handleStrategy;
+
+    public ErrorMessageHandler(IErrorMessageHandleStrategy handleStrategy)
+    {
+        _handleStrategy = handleStrategy;
+    }
+    
+    public async Task Handle(ErrorMessage message, CancellationToken cancellationToken)
+    {
+        await _handleStrategy.Handle(message, cancellationToken);
+    }
+}

dotnet/AipsCore/Application/Common/Message/ErrorMessage/IErrorMessageHandleStrategy.cs

@@ -0,0 +1,6 @@
+namespace AipsCore.Application.Common.Message.ErrorMessage;
+
+public interface IErrorMessageHandleStrategy
+{
+    Task Handle(ErrorMessage message, CancellationToken cancellationToken);
+}

dotnet/AipsCore/Application/Common/Message/MoveShape/MoveShapeMessage.cs

@@ -1,6 +1,13 @@
+using AipsCore.Application.Abstract;
 using AipsCore.Application.Abstract.MessageBroking;
 using AipsCore.Application.Models.Shape.Command.MoveShape;
 
 namespace AipsCore.Application.Common.Message.MoveShape;
 
-public record MoveShapeMessage(MoveShapeCommand Command) : IMessage;
+public record MoveShapeMessage(Guid WhiteboardId, MoveShapeCommand Command) : IMessage, IWhiteboardAwareContext
+{
+    public Guid GetWhiteboardId()
+    {
+        return WhiteboardId;
+    }
+}

dotnet/AipsCore/Application/Common/Message/RejectUserRequestToJoin/RejectUserRequestToJoinMessage.cs

@@ -0,0 +1,6 @@
+using AipsCore.Application.Abstract.MessageBroking;
+using AipsCore.Application.Models.Whiteboard.Command.RejectUserRequestToJoin;
+
+namespace AipsCore.Application.Common.Message.RejectUserRequestToJoin;
+
+public record RejectUserRequestToJoinMessage(RejectUserRequestToJoinCommand Command): IMessage;

dotnet/AipsCore/Application/Common/Message/RejectUserRequestToJoin/RejectUserRequestToJoinMessageHandler.cs

@@ -0,0 +1,19 @@
+using AipsCore.Application.Abstract;
+using AipsCore.Application.Abstract.MessageBroking;
+
+namespace AipsCore.Application.Common.Message.RejectUserRequestToJoin;
+
+public class RejectUserRequestToJoinMessageHandler : IMessageHandler<RejectUserRequestToJoinMessage>
+{
+    private readonly IDispatcher _dispatcher;
+
+    public RejectUserRequestToJoinMessageHandler(IDispatcher dispatcher)
+    {
+        _dispatcher = dispatcher;
+    }
+
+    public async Task Handle(RejectUserRequestToJoinMessage message, CancellationToken cancellationToken)
+    {
+        await _dispatcher.Execute(message.Command, cancellationToken);
+    }
+}

dotnet/AipsCore/Application/Common/Message/UserCanceledRequestToJoin/UserCanceledRequestToJoinMessage.cs

@@ -0,0 +1,6 @@
+using AipsCore.Application.Abstract.MessageBroking;
+using AipsCore.Application.Models.Whiteboard.Command.UserCanceledRequestToJoin;
+
+namespace AipsCore.Application.Common.Message.UserCanceledRequestToJoin;
+
+public record UserCanceledRequestToJoinMessage(UserCanceledRequestToJoinCommand Command): IMessage;

dotnet/AipsCore/Application/Common/Message/UserCanceledRequestToJoin/UserCanceledRequestToJoinMessageHandler.cs

@@ -0,0 +1,19 @@
+using AipsCore.Application.Abstract;
+using AipsCore.Application.Abstract.MessageBroking;
+
+namespace AipsCore.Application.Common.Message.UserCanceledRequestToJoin;
+
+public class UserCanceledRequestToJoinMessageHandler : IMessageHandler<UserCanceledRequestToJoinMessage>
+{
+    private readonly IDispatcher _dispatcher;
+
+    public UserCanceledRequestToJoinMessageHandler(IDispatcher dispatcher)
+    {
+        _dispatcher = dispatcher;
+    }
+
+    public async Task Handle(UserCanceledRequestToJoinMessage message, CancellationToken cancellationToken)
+    {
+        await _dispatcher.Execute(message.Command, cancellationToken);
+    }
+}

dotnet/AipsCore/Application/Models/Whiteboard/Command/AcceptUserRequestToJoin/AcceptUserRequestToJoinCommand.cs

@@ -0,0 +1,5 @@
+using AipsCore.Application.Abstract.Command;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.AcceptUserRequestToJoin;
+
+public record AcceptUserRequestToJoinCommand(string WhiteboardId, string UserId): ICommand;

dotnet/AipsCore/Application/Models/Whiteboard/Command/AcceptUserRequestToJoin/AcceptUserRequestToJoinCommandHandler.cs

@@ -0,0 +1,40 @@
+using AipsCore.Application.Abstract.Command;
+using AipsCore.Domain.Abstract;
+using AipsCore.Domain.Common.Validation;
+using AipsCore.Domain.Models.User.ValueObjects;
+using AipsCore.Domain.Models.Whiteboard.ValueObjects;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+using AipsCore.Domain.Models.WhiteboardMembership.External;
+using AipsCore.Domain.Models.WhiteboardMembership.Validation;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.AcceptUserRequestToJoin;
+
+public class AcceptUserRequestToJoinCommandHandler : ICommandHandler<AcceptUserRequestToJoinCommand>
+{
+    private readonly IWhiteboardMembershipRepository _whiteboardMembershipRepository;
+    private readonly IUnitOfWork _unitOfWork;
+
+    public AcceptUserRequestToJoinCommandHandler(IWhiteboardMembershipRepository whiteboardMembershipRepository, IUnitOfWork unitOfWork)
+    {
+        _whiteboardMembershipRepository = whiteboardMembershipRepository;
+        _unitOfWork = unitOfWork;
+    }
+
+    public async Task Handle(AcceptUserRequestToJoinCommand command, CancellationToken cancellationToken = default)
+    {
+        var whiteboardId = new WhiteboardId(command.WhiteboardId);
+        var userId = new UserId(command.UserId);
+
+        var membership = await _whiteboardMembershipRepository.GetByWhiteboardAndUserAsync(whiteboardId, userId, cancellationToken);
+
+        if (membership is null)
+        {
+            throw new ValidationException(WhiteboardMembershipErrors.NotFound(whiteboardId, userId));
+        }
+        
+        membership.UpdateStatus(WhiteboardMembershipStatus.Accepted);
+        
+        await _whiteboardMembershipRepository.SaveAsync(membership, cancellationToken);
+        await _unitOfWork.SaveChangesAsync(cancellationToken);
+    }
+}

dotnet/AipsCore/Application/Models/Whiteboard/Command/AddUserToWhiteboard/AddUserToWhiteboardCommand.cs

@@ -1,11 +0,0 @@
-using AipsCore.Application.Abstract.Command;
-using AipsCore.Domain.Models.User.ValueObjects;
-using AipsCore.Domain.Models.Whiteboard.ValueObjects;
-using AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
-
-namespace AipsCore.Application.Models.Whiteboard.Command.AddUserToWhiteboard;
-
-public record AddUserToWhiteboardCommand(
-    string UserId, 
-    string WhiteboardId)
-    : ICommand;

dotnet/AipsCore/Application/Models/Whiteboard/Command/AddUserToWhiteboard/AddUserToWhiteboardCommandErrors.cs

@@ -1,12 +0,0 @@
-using AipsCore.Domain.Common.Validation;
-using AipsCore.Domain.Models.Whiteboard.ValueObjects;
-
-namespace AipsCore.Application.Models.Whiteboard.Command.AddUserToWhiteboard;
-
-public static class AddUserToWhiteboardCommandErrors
-{
-    public static ValidationError WhiteboardDoesNotExist(WhiteboardId whiteboardId)
-        => new ValidationError(
-            Code: "whiteboard_not_exists", 
-            Message: $"Whiteboard with id '{whiteboardId}' does not exist.");
-}

dotnet/AipsCore/Application/Models/Whiteboard/Command/AddUserToWhiteboard/AddUserToWhiteboardCommandHandler.cs

@@ -1,65 +0,0 @@
-using AipsCore.Application.Abstract;
-using AipsCore.Application.Abstract.Command;
-using AipsCore.Domain.Abstract;
-using AipsCore.Domain.Common.Validation;
-using AipsCore.Domain.Models.User.External;
-using AipsCore.Domain.Models.User.Validation;
-using AipsCore.Domain.Models.User.ValueObjects;
-using AipsCore.Domain.Models.Whiteboard.External;
-using AipsCore.Domain.Models.Whiteboard.Validation;
-using AipsCore.Domain.Models.Whiteboard.ValueObjects;
-using AipsCore.Domain.Models.WhiteboardMembership.External;
-
-namespace AipsCore.Application.Models.Whiteboard.Command.AddUserToWhiteboard;
-
-public class AddUserToWhiteboardCommandHandler
-    : ICommandHandler<AddUserToWhiteboardCommand>
-{
-    private readonly IWhiteboardRepository _whiteboardRepository;
-    private readonly IWhiteboardMembershipRepository _whiteboardMembershipRepository;
-    private readonly IUserRepository _userRepository;
-    private readonly IUnitOfWork _unitOfWork;
-    private readonly IDispatcher _dispatcher;
-
-    public AddUserToWhiteboardCommandHandler(
-        IWhiteboardRepository whiteboardRepository,
-        IWhiteboardMembershipRepository whiteboardMembershipRepository,
-        IUserRepository userRepository,
-        IUnitOfWork unitOfWork,
-        IDispatcher dispatcher)
-    {
-        _whiteboardRepository = whiteboardRepository;
-        _whiteboardMembershipRepository = whiteboardMembershipRepository;
-        _userRepository = userRepository;
-        _unitOfWork = unitOfWork;
-        _dispatcher = dispatcher;
-    }
-
-    private Domain.Models.Whiteboard.Whiteboard? _whiteboard;
-    private Domain.Models.User.User? _user;
-    
-    public async Task Handle(AddUserToWhiteboardCommand command, CancellationToken cancellationToken = default)
-    {
-        _whiteboard = await _whiteboardRepository.GetByIdAsync(new WhiteboardId(command.WhiteboardId), cancellationToken);
-        _user = await _userRepository.GetByIdAsync(new UserId(command.UserId), cancellationToken);
-        
-        Validate(command);
-        
-        await _whiteboard!.AddUserAsync(_user!, _whiteboardMembershipRepository, cancellationToken);
-
-        await _unitOfWork.SaveChangesAsync(cancellationToken);
-    }
-
-    private void Validate(AddUserToWhiteboardCommand command)
-    {
-        if (_whiteboard is null)
-        {
-            throw new ValidationException(WhiteboardErrors.NotFound(new WhiteboardId(command.WhiteboardId)));
-        }
-
-        if (_user is null)
-        {
-            throw new ValidationException(UserErrors.NotFound(new UserId(command.UserId)));
-        }
-    }
-}

dotnet/AipsCore/Application/Models/Whiteboard/Command/BanUserFromWhiteboard/BanUserFromWhiteboardCommandErrors.cs

@@ -1,18 +0,0 @@
-using AipsCore.Domain.Common.Validation;
-using AipsCore.Domain.Models.User.ValueObjects;
-using AipsCore.Domain.Models.Whiteboard.ValueObjects;
-
-namespace AipsCore.Application.Models.Whiteboard.Command.BanUserFromWhiteboard;
-
-public static class BanUserFromWhiteboardCommandErrors
-{
-    public static ValidationError WhiteboardMembershipNotFound(WhiteboardId whiteboardId, UserId userId)
-        => new ValidationError(
-            Code: "whiteboard_membership_not_found",
-            Message: $"User with id '{userId.IdValue}' is not a member of whiteboard with id '{whiteboardId.IdValue}'");
-    
-    public static ValidationError WhiteboardNotFound(WhiteboardId whiteboardId)
-        => new ValidationError(
-            Code: "whiteboard_not_found",
-            Message: $"Whiteboard with id '{whiteboardId.IdValue}' not found.");
-}

dotnet/AipsCore/Application/Models/Whiteboard/Command/BanUserFromWhiteboard/BanUserFromWhiteboardCommandHandler.cs

@@ -4,8 +4,10 @@ using AipsCore.Domain.Abstract;
 using AipsCore.Domain.Common.Validation;
 using AipsCore.Domain.Models.User.ValueObjects;
 using AipsCore.Domain.Models.Whiteboard.External;
+using AipsCore.Domain.Models.Whiteboard.Validation;
 using AipsCore.Domain.Models.Whiteboard.ValueObjects;
 using AipsCore.Domain.Models.WhiteboardMembership.External;
+using AipsCore.Domain.Models.WhiteboardMembership.Validation;
 
 namespace AipsCore.Application.Models.Whiteboard.Command.BanUserFromWhiteboard;
 
@@ -37,14 +39,14 @@ public class BanUserFromWhiteboardCommandHandler : ICommandHandler<BanUserFromWh
 
         if (whiteboard is null)
         {
-            throw new ValidationException(BanUserFromWhiteboardCommandErrors.WhiteboardNotFound(whiteboardId));
+            throw new ValidationException(WhiteboardErrors.NotFound(whiteboardId));
         }
         
         var membership = await _whiteboardMembershipRepository.GetByWhiteboardAndUserAsync(whiteboardId, userId, cancellationToken);
 
         if (membership is null)
         {
-            throw new ValidationException(BanUserFromWhiteboardCommandErrors.WhiteboardMembershipNotFound(whiteboardId, userId));
+            throw new ValidationException(WhiteboardMembershipErrors.NotFound(whiteboardId, userId));
         }
         
         whiteboard.BanUser(_userContext.GetCurrentUserId(), membership);

dotnet/AipsCore/Application/Models/Whiteboard/Command/JoinWithCode/JoinWithCodeCommand.cs

@@ -0,0 +1,5 @@
+using AipsCore.Application.Abstract.Command;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.JoinWithCode;
+
+public record JoinWithCodeCommand(string Code): ICommand<JoinWithCodeDto>;

dotnet/AipsCore/Application/Models/Whiteboard/Command/JoinWithCode/JoinWithCodeCommandHandler.cs

@@ -0,0 +1,65 @@
+using AipsCore.Application.Abstract.Command;
+using AipsCore.Application.Abstract.UserContext;
+using AipsCore.Domain.Abstract;
+using AipsCore.Domain.Common.Validation;
+using AipsCore.Domain.Models.Whiteboard.External;
+using AipsCore.Domain.Models.Whiteboard.Validation;
+using AipsCore.Domain.Models.Whiteboard.ValueObjects;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+using AipsCore.Domain.Models.WhiteboardMembership.External;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.JoinWithCode;
+
+public class JoinWithCodeCommandHandler : ICommandHandler<JoinWithCodeCommand, JoinWithCodeDto>
+{
+    private readonly IWhiteboardRepository _whiteboardRepository;
+    private readonly IWhiteboardMembershipRepository _whiteboardMembershipRepository;
+    private readonly IUnitOfWork _unitOfWork;
+    private readonly IUserContext _userContext;
+
+    public JoinWithCodeCommandHandler(
+        IWhiteboardRepository whiteboardRepository,
+        IWhiteboardMembershipRepository whiteboardMembershipRepository,
+        IUnitOfWork unitOfWork, 
+        IUserContext userContext)
+    {
+        _whiteboardRepository = whiteboardRepository;
+        _whiteboardMembershipRepository = whiteboardMembershipRepository;
+        _unitOfWork = unitOfWork;
+        _userContext = userContext;
+    }
+
+    public async Task<JoinWithCodeDto> Handle(JoinWithCodeCommand command, CancellationToken cancellationToken = default)
+    {
+        var userId = _userContext.GetCurrentUserId();
+        
+        var code = new WhiteboardCode(command.Code);
+        var whiteboard = await _whiteboardRepository.GetByCodeAsync(code, cancellationToken);
+
+        if (whiteboard is null)
+        {
+            throw new ValidationException(WhiteboardErrors.NotFound(code));
+        }
+
+        if (!whiteboard.ShouldRequestToJoin(userId))
+        {
+            return new JoinWithCodeDto(whiteboard.Id.IdValue, WhiteboardMembershipStatus.Accepted);
+        }
+
+        var membership = await _whiteboardMembershipRepository.GetByWhiteboardAndUserAsync(whiteboard.Id, userId, cancellationToken);
+        
+        if (membership is null)
+        {
+            membership = whiteboard.RequestJoin(userId);
+        }
+        else
+        {
+            whiteboard.RequestReJoin(membership);
+        }
+
+        await _whiteboardMembershipRepository.SaveAsync(membership, cancellationToken);
+        await _unitOfWork.SaveChangesAsync(cancellationToken);
+        
+        return new JoinWithCodeDto(whiteboard.Id.IdValue, membership.Status);
+    }
+}

dotnet/AipsCore/Application/Models/Whiteboard/Command/JoinWithCode/JoinWithCodeDto.cs

@@ -0,0 +1,5 @@
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.JoinWithCode;
+
+public record JoinWithCodeDto(string WhiteboardId, WhiteboardMembershipStatus Status);

dotnet/AipsCore/Application/Models/Whiteboard/Command/KickUserFromWhiteboard/KickUserFromWhiteboardCommandErrors.cs

@@ -1,18 +0,0 @@
-using AipsCore.Domain.Common.Validation;
-using AipsCore.Domain.Models.User.ValueObjects;
-using AipsCore.Domain.Models.Whiteboard.ValueObjects;
-
-namespace AipsCore.Application.Models.Whiteboard.Command.KickUserFromWhiteboard;
-
-public static class KickUserFromWhiteboardCommandErrors
-{
-    public static ValidationError WhiteboardMembershipNotFound(WhiteboardId whiteboardId, UserId userId)
-        => new ValidationError(
-            Code: "whiteboard_membership_not_found",
-            Message: $"User with id '{userId}' is not a member of whiteboard with id '{whiteboardId}'");
-    
-    public static ValidationError WhiteboardNotFound(WhiteboardId whiteboardId)
-        => new ValidationError(
-            Code: "whiteboard_not_found",
-            Message: $"Whiteboard with id '{whiteboardId}' not found.");
-}

dotnet/AipsCore/Application/Models/Whiteboard/Command/KickUserFromWhiteboard/KickUserFromWhiteboardCommandHandler.cs

@@ -4,8 +4,10 @@ using AipsCore.Domain.Abstract;
 using AipsCore.Domain.Common.Validation;
 using AipsCore.Domain.Models.User.ValueObjects;
 using AipsCore.Domain.Models.Whiteboard.External;
+using AipsCore.Domain.Models.Whiteboard.Validation;
 using AipsCore.Domain.Models.Whiteboard.ValueObjects;
 using AipsCore.Domain.Models.WhiteboardMembership.External;
+using AipsCore.Domain.Models.WhiteboardMembership.Validation;
 
 namespace AipsCore.Application.Models.Whiteboard.Command.KickUserFromWhiteboard;
 
@@ -37,14 +39,14 @@ public class KickUserFromWhiteboardCommandHandler : ICommandHandler<KickUserFrom
 
         if (whiteboard is null)
         {
-            throw new ValidationException(KickUserFromWhiteboardCommandErrors.WhiteboardNotFound(whiteboardId));
+            throw new ValidationException(WhiteboardErrors.NotFound(whiteboardId));
         }
         
         var membership = await _whiteboardMembershipRepository.GetByWhiteboardAndUserAsync(whiteboardId, userId, cancellationToken);
 
         if (membership is null)
         {
-            throw new ValidationException(KickUserFromWhiteboardCommandErrors.WhiteboardMembershipNotFound(whiteboardId, userId));
+            throw new ValidationException(WhiteboardMembershipErrors.NotFound(whiteboardId, userId));
         }
         
         whiteboard.KickUser(_userContext.GetCurrentUserId(), membership);

dotnet/AipsCore/Application/Models/Whiteboard/Command/RejectUserRequestToJoin/RejectUserRequestToJoinCommand.cs

@@ -0,0 +1,5 @@
+using AipsCore.Application.Abstract.Command;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.RejectUserRequestToJoin;
+
+public record RejectUserRequestToJoinCommand(string WhiteboardId, string UserId): ICommand;

dotnet/AipsCore/Application/Models/Whiteboard/Command/RejectUserRequestToJoin/RejectUserRequestToJoinCommandHandler.cs

@@ -0,0 +1,40 @@
+using AipsCore.Application.Abstract.Command;
+using AipsCore.Domain.Abstract;
+using AipsCore.Domain.Common.Validation;
+using AipsCore.Domain.Models.User.ValueObjects;
+using AipsCore.Domain.Models.Whiteboard.ValueObjects;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+using AipsCore.Domain.Models.WhiteboardMembership.External;
+using AipsCore.Domain.Models.WhiteboardMembership.Validation;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.RejectUserRequestToJoin;
+
+public class RejectUserRequestToJoinCommandHandler : ICommandHandler<RejectUserRequestToJoinCommand>
+{
+    private readonly IWhiteboardMembershipRepository _whiteboardMembershipRepository;
+    private readonly IUnitOfWork _unitOfWork;
+
+    public RejectUserRequestToJoinCommandHandler(IWhiteboardMembershipRepository whiteboardMembershipRepository, IUnitOfWork unitOfWork)
+    {
+        _whiteboardMembershipRepository = whiteboardMembershipRepository;
+        _unitOfWork = unitOfWork;
+    }
+
+    public async Task Handle(RejectUserRequestToJoinCommand command, CancellationToken cancellationToken = default)
+    {
+        var whiteboardId = new WhiteboardId(command.WhiteboardId);
+        var userId = new UserId(command.UserId);
+        
+        var membership = await _whiteboardMembershipRepository.GetByWhiteboardAndUserAsync(whiteboardId, userId, cancellationToken);
+
+        if (membership is null)
+        {
+            throw new ValidationException(WhiteboardMembershipErrors.NotFound(whiteboardId, userId));
+        }
+        
+        membership.UpdateStatus(WhiteboardMembershipStatus.Rejected);
+        
+        await _whiteboardMembershipRepository.SaveAsync(membership, cancellationToken);
+        await _unitOfWork.SaveChangesAsync(cancellationToken);
+    }
+}

dotnet/AipsCore/Application/Models/Whiteboard/Command/UnbanUserFromWhiteboard/UnbanUserFromWhiteboardCommandErrors.cs

@@ -1,18 +0,0 @@
-using AipsCore.Domain.Common.Validation;
-using AipsCore.Domain.Models.User.ValueObjects;
-using AipsCore.Domain.Models.Whiteboard.ValueObjects;
-
-namespace AipsCore.Application.Models.Whiteboard.Command.UnbanUserFromWhiteboard;
-
-public static class UnbanUserFromWhiteboardCommandErrors
-{
-    public static ValidationError WhiteboardMembershipNotFound(WhiteboardId whiteboardId, UserId userId)
-        => new ValidationError(
-            Code: "whiteboard_membership_not_found",
-            Message: $"User with id '{userId}' is not a member of whiteboard with id '{whiteboardId}'");
-    
-    public static ValidationError WhiteboardNotFound(WhiteboardId whiteboardId)
-        => new ValidationError(
-            Code: "whiteboard_not_found",
-            Message: $"Whiteboard with id '{whiteboardId}' not found.");
-}

dotnet/AipsCore/Application/Models/Whiteboard/Command/UnbanUserFromWhiteboard/UnbanUserFromWhiteboardCommandHandler.cs

@@ -4,8 +4,10 @@ using AipsCore.Domain.Abstract;
 using AipsCore.Domain.Common.Validation;
 using AipsCore.Domain.Models.User.ValueObjects;
 using AipsCore.Domain.Models.Whiteboard.External;
+using AipsCore.Domain.Models.Whiteboard.Validation;
 using AipsCore.Domain.Models.Whiteboard.ValueObjects;
 using AipsCore.Domain.Models.WhiteboardMembership.External;
+using AipsCore.Domain.Models.WhiteboardMembership.Validation;
 
 namespace AipsCore.Application.Models.Whiteboard.Command.UnbanUserFromWhiteboard;
 
@@ -37,14 +39,14 @@ public class UnbanUserFromWhiteboardCommandHandler : ICommandHandler<UnbanUserFr
 
         if (whiteboard is null)
         {
-            throw new ValidationException(UnbanUserFromWhiteboardCommandErrors.WhiteboardNotFound(whiteboardId));
+            throw new ValidationException(WhiteboardErrors.NotFound(whiteboardId));
         }
         
         var membership = await _whiteboardMembershipRepository.GetByWhiteboardAndUserAsync(whiteboardId, userId, cancellationToken);
 
         if (membership is null)
         {
-            throw new ValidationException(UnbanUserFromWhiteboardCommandErrors.WhiteboardMembershipNotFound(whiteboardId, userId));
+            throw new ValidationException(WhiteboardMembershipErrors.NotFound(whiteboardId, userId));
         }
         
         whiteboard.UnbanUser(_userContext.GetCurrentUserId(), membership);

dotnet/AipsCore/Application/Models/Whiteboard/Command/UserCanceledRequestToJoin/UserCanceledRequestToJoinCommand.cs

@@ -0,0 +1,5 @@
+using AipsCore.Application.Abstract.Command;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.UserCanceledRequestToJoin;
+
+public record UserCanceledRequestToJoinCommand(string WhiteboardId, string UserId): ICommand;

dotnet/AipsCore/Application/Models/Whiteboard/Command/UserCanceledRequestToJoin/UserCanceledRequestToJoinCommandHandler.cs

@@ -0,0 +1,40 @@
+using AipsCore.Application.Abstract.Command;
+using AipsCore.Domain.Abstract;
+using AipsCore.Domain.Common.Validation;
+using AipsCore.Domain.Models.User.ValueObjects;
+using AipsCore.Domain.Models.Whiteboard.ValueObjects;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+using AipsCore.Domain.Models.WhiteboardMembership.External;
+using AipsCore.Domain.Models.WhiteboardMembership.Validation;
+
+namespace AipsCore.Application.Models.Whiteboard.Command.UserCanceledRequestToJoin;
+
+public class CancelJoinRequestCommandHandler : ICommandHandler<UserCanceledRequestToJoinCommand>
+{
+    private readonly IWhiteboardMembershipRepository _whiteboardMembershipRepository;
+    private readonly IUnitOfWork _unitOfWork;
+
+    public CancelJoinRequestCommandHandler(IWhiteboardMembershipRepository whiteboardMembershipRepository, IUnitOfWork unitOfWork)
+    {
+        _whiteboardMembershipRepository = whiteboardMembershipRepository;
+        _unitOfWork = unitOfWork;
+    }
+
+    public async Task Handle(UserCanceledRequestToJoinCommand command, CancellationToken cancellationToken = default)
+    {
+        var whiteboardId = new WhiteboardId(command.WhiteboardId);
+        var userId = new UserId(command.UserId);
+        
+        var membership = await _whiteboardMembershipRepository.GetByWhiteboardAndUserAsync(whiteboardId, userId, cancellationToken);
+
+        if (membership is null)
+        {
+            throw new ValidationException(WhiteboardMembershipErrors.NotFound(whiteboardId, userId));
+        }
+        
+        membership.UpdateStatus(WhiteboardMembershipStatus.Cancelled);
+        
+        await _whiteboardMembershipRepository.SaveAsync(membership, cancellationToken);
+        await _unitOfWork.SaveChangesAsync(cancellationToken);
+    }
+}

dotnet/AipsCore/Application/Models/Whiteboard/Query/GetMembershipStatus/GetMembershipStatusQuery.cs

@@ -0,0 +1,6 @@
+using AipsCore.Application.Abstract.Query;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+
+namespace AipsCore.Application.Models.Whiteboard.Query.GetMembershipStatus;
+
+public record GetMembershipStatusQuery(string WhiteboardId, string UserId): IQuery<WhiteboardMembershipStatus>;

dotnet/AipsCore/Application/Models/Whiteboard/Query/GetMembershipStatus/GetMembershipStatusQueryHandler.cs

@@ -0,0 +1,34 @@
+using AipsCore.Application.Abstract.Query;
+using AipsCore.Domain.Common.Validation;
+using AipsCore.Domain.Models.User.ValueObjects;
+using AipsCore.Domain.Models.Whiteboard.ValueObjects;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+using AipsCore.Domain.Models.WhiteboardMembership.External;
+using AipsCore.Domain.Models.WhiteboardMembership.Validation;
+
+namespace AipsCore.Application.Models.Whiteboard.Query.GetMembershipStatus;
+
+public class GetMembershipStatusQueryHandler : IQueryHandler<GetMembershipStatusQuery, WhiteboardMembershipStatus>
+{
+    private readonly IWhiteboardMembershipRepository _whiteboardMembershipRepository;
+
+    public GetMembershipStatusQueryHandler(IWhiteboardMembershipRepository whiteboardMembershipRepository)
+    {
+        _whiteboardMembershipRepository = whiteboardMembershipRepository;
+    }
+
+    public async Task<WhiteboardMembershipStatus> Handle(GetMembershipStatusQuery query, CancellationToken cancellationToken = default)
+    {
+        var userId = new UserId(query.UserId);
+        var whiteboardId = new WhiteboardId(query.WhiteboardId);
+
+        var membership = await _whiteboardMembershipRepository.GetByWhiteboardAndUserAsync(whiteboardId, userId, cancellationToken);
+
+        if (membership is null)
+        {
+            throw new ValidationException(WhiteboardMembershipErrors.NotFound(whiteboardId, userId));
+        }
+        
+        return membership.Status;
+    }
+}

dotnet/AipsCore/Application/Models/Whiteboard/Query/GetRecentWhiteboards/GetRecentWhiteboardsQueryHandler.cs

@@ -1,6 +1,7 @@
 using AipsCore.Application.Abstract.Query;
 using AipsCore.Application.Abstract.UserContext;
 using AipsCore.Domain.Models.Whiteboard.Enums;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
 using AipsCore.Infrastructure.Persistence.Db;
 using Microsoft.EntityFrameworkCore;
 
@@ -32,7 +33,7 @@ public class GetRecentWhiteboardsQueryHandler : IQueryHandler<GetRecentWhiteboar
             .Include(m => m.Whiteboard)
             .Where(m => (
                 m.UserId == userIdGuid &&
-                m.IsBanned == false &&
+                m.Status != WhiteboardMembershipStatus.Banned &&
                 m.Whiteboard != null &&
                 m.Whiteboard.State != WhiteboardState.Deleted
             ))

dotnet/AipsCore/Application/Models/Whiteboard/Query/GetWhiteboardInfoRT/GetWhiteboardInfoRTQueryHandler.cs

@@ -34,6 +34,7 @@ public class GetWhiteboardInfoRTQueryHandler
         return _context.Whiteboards
             .Where(w => w.Id == whiteboardId)
             .Include(w => w.Memberships)
+            .ThenInclude(m => m.User)
             .Include(w => w.Owner)
             .Include(w => w.Shapes);
     }

dotnet/AipsCore/Application/Models/WhiteboardMembership/Command/CreateWhiteboardMembership/CreateWhiteboardMembershipCommand.cs

@@ -1,11 +0,0 @@
-using AipsCore.Application.Abstract.Command;
-using AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
-
-namespace AipsCore.Application.Models.WhiteboardMembership.Command.CreateWhiteboardMembership;
-
-public record CreateWhiteboardMembershipCommand(
-    string WhiteboardId, 
-    bool IsBanned,
-    bool EditingEnabled,
-    bool CanJoin)
-    : ICommand<WhiteboardMembershipId>;

dotnet/AipsCore/Application/Models/WhiteboardMembership/Command/CreateWhiteboardMembership/CreateWhiteboardMembershipCommandHandler.cs

@@ -1,42 +0,0 @@
-using AipsCore.Application.Abstract.Command;
-using AipsCore.Application.Abstract.UserContext;
-using AipsCore.Domain.Abstract;
-using AipsCore.Domain.Models.WhiteboardMembership.External;
-using AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
-
-namespace AipsCore.Application.Models.WhiteboardMembership.Command.CreateWhiteboardMembership;
-
-public class CreateWhiteboardMembershipCommandHandler : ICommandHandler<CreateWhiteboardMembershipCommand, WhiteboardMembershipId>
-{
-    private readonly IWhiteboardMembershipRepository _whiteboardMembershipRepository;
-    private readonly IUserContext _userContext;
-    private readonly IUnitOfWork _unitOfWork;
-    
-    public CreateWhiteboardMembershipCommandHandler(
-        IWhiteboardMembershipRepository whiteboardMembershipRepository,
-        IUserContext userContext,
-        IUnitOfWork unitOfWork)
-    {
-        _whiteboardMembershipRepository = whiteboardMembershipRepository;
-        _userContext = userContext;
-        _unitOfWork = unitOfWork;
-    }
-    
-    public async Task<WhiteboardMembershipId> Handle(CreateWhiteboardMembershipCommand command, CancellationToken cancellationToken = default)
-    {
-        var userId = _userContext.GetCurrentUserId();
-        
-        var whiteboardMembership = Domain.Models.WhiteboardMembership.WhiteboardMembership.Create(
-            command.WhiteboardId, 
-            userId.IdValue, 
-            command.IsBanned, 
-            command.EditingEnabled, 
-            command.CanJoin, 
-            DateTime.UtcNow);
-
-        await _whiteboardMembershipRepository.SaveAsync(whiteboardMembership, cancellationToken);
-        await _unitOfWork.SaveChangesAsync(cancellationToken);
-        
-        return whiteboardMembership.Id;
-    }
-}

dotnet/AipsCore/Domain/Common/Validation/Rules/MaxLengthRule.cs

@@ -7,7 +7,7 @@ public class MaxLengthRule : AbstractRule
 {
     private readonly string _stringValue;
     private readonly int _maximumLentgh;
-    protected override string ErrorCode => "minimum_length";
+    protected override string ErrorCode => "maximum_length";
     protected override string ErrorMessage 
         => $"Length of '{ValueObjectName}' must be at most {_maximumLentgh} characters";
 

dotnet/AipsCore/Domain/Models/Whiteboard/External/IWhiteboardRepository.cs

@@ -6,5 +6,6 @@ namespace AipsCore.Domain.Models.Whiteboard.External;
 public interface IWhiteboardRepository 
     : IAbstractRepository<Whiteboard, WhiteboardId>, ISoftDeletableRepository<WhiteboardId>
 {
-    Task<bool> WhiteboardCodeExists(WhiteboardCode whiteboardCode);
+    Task<bool> WhiteboardCodeExistsAsync(WhiteboardCode whiteboardCode);
+    Task<Whiteboard?> GetByCodeAsync(WhiteboardCode whiteboardCode, CancellationToken cancellationToken = default);
 }

dotnet/AipsCore/Domain/Models/Whiteboard/Validation/WhiteboardErrors.cs

@@ -7,6 +7,38 @@ namespace AipsCore.Domain.Models.Whiteboard.Validation;
 
 public class WhiteboardErrors : AbstractErrors<Whiteboard, WhiteboardId>
 {
+    public static ValidationError NotFound(WhiteboardCode whiteboardCode)
+    {
+        const string code = "not_found";
+        string message = $"Whiteboard with code '{whiteboardCode.CodeValue}' was not found!";
+        
+        return CreateValidationError(code,message);
+    }
+    
+    public static ValidationError CannotJoin(WhiteboardCode whiteboardCode)
+    {
+        const string code = "cannot_join_whiteboard";
+        string message = $"Cannot join the whiteboard with code '{whiteboardCode.CodeValue}'";
+        
+        return CreateValidationError(code,message);
+    }
+    
+    public static ValidationError UserBanned(UserId userId)
+    {
+        const string code = "user_banned_from_whiteboard";
+        string message = $"User with id '{userId}' is banned from this whiteboard.";
+        
+        return CreateValidationError(code,message);
+    }
+    
+    public static ValidationError UserAlreadyTryingToJoin(UserId userId)
+    {
+        const string code = "user_already_trying_to_join_whiteboard";
+        string message = $"User with id '{userId}' is already trying to join the whiteboard.";
+        
+        return CreateValidationError(code,message);
+    }
+    
     public static ValidationError UserAlreadyAdded(UserId userId)
     {
         string code = "user_already_added";

dotnet/AipsCore/Domain/Models/Whiteboard/ValueObjects/WhiteboardCode.cs

@@ -36,7 +36,7 @@ public record WhiteboardCode : AbstractValueObject
         {
             whiteboardCode = Generate();
 
-            codeExists = await whiteboardRepository.WhiteboardCodeExists(whiteboardCode);
+            codeExists = await whiteboardRepository.WhiteboardCodeExistsAsync(whiteboardCode);
         } while (codeExists);
 
         return whiteboardCode;

dotnet/AipsCore/Domain/Models/Whiteboard/Whiteboard.AddUser.cs

@@ -1,42 +1,47 @@
-using System.Runtime.InteropServices.Swift;
-using AipsCore.Domain.Abstract;
 using AipsCore.Domain.Common.Validation;
+using AipsCore.Domain.Models.User.ValueObjects;
 using AipsCore.Domain.Models.Whiteboard.Enums;
 using AipsCore.Domain.Models.Whiteboard.Validation;
-using AipsCore.Domain.Models.Whiteboard.ValueObjects;
-using AipsCore.Domain.Models.WhiteboardMembership.External;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
 
 namespace AipsCore.Domain.Models.Whiteboard;
 
-public partial class Whiteboard : DomainModel<WhiteboardId>
+public partial class Whiteboard 
 {
-    public async Task AddUserAsync(
-        User.User user, 
-        IWhiteboardMembershipRepository membershipRepository, 
-        CancellationToken cancellationToken = default)
+    public WhiteboardMembership.WhiteboardMembership RequestJoin(UserId userId)
     {
-        var membership 
-            = await membershipRepository.GetByWhiteboardAndUserAsync(this.Id, user.Id, cancellationToken);
-
-        if (membership is not null)
-        {
-            throw new ValidationException(WhiteboardErrors.UserAlreadyAdded(user.Id));
-        }
-
-        membership = WhiteboardMembership.WhiteboardMembership.Create(
-            this.Id.IdValue,
-            user.Id.IdValue,
+        return WhiteboardMembership.WhiteboardMembership.Create(
+            Id.IdValue,
+            userId.IdValue,
             false,
-            false,
-            this.GetCanJoin(),
-            DateTime.UtcNow
-        );
-        
-        await membershipRepository.AddAsync(membership, cancellationToken);
+            DetermineJoinStatus(),
+            DateTime.UtcNow);
     }
 
-    private bool GetCanJoin()
+    public void RequestReJoin(WhiteboardMembership.WhiteboardMembership membership)
     {
-        return this.JoinPolicy == WhiteboardJoinPolicy.FreeToJoin;
+        switch (membership.Status)
+        {
+            case WhiteboardMembershipStatus.Banned:
+                throw new ValidationException(WhiteboardErrors.UserBanned(membership.UserId));
+            case WhiteboardMembershipStatus.Pending:
+                throw new ValidationException(WhiteboardErrors.UserAlreadyTryingToJoin(membership.UserId));
+            case WhiteboardMembershipStatus.Accepted:
+                break;
+            default:
+                membership.UpdateStatus(DetermineJoinStatus());
+                break;
+        }
+    }
+
+    private WhiteboardMembershipStatus DetermineJoinStatus()
+    {
+        return JoinPolicy switch
+        {
+            WhiteboardJoinPolicy.FreeToJoin => WhiteboardMembershipStatus.Accepted,
+            WhiteboardJoinPolicy.RequestToJoin => WhiteboardMembershipStatus.Pending,
+            WhiteboardJoinPolicy.Private => throw new ValidationException(WhiteboardErrors.CannotJoin(Code)),
+            _ => throw new ArgumentOutOfRangeException()
+        };
     }
 }  

dotnet/AipsCore/Domain/Models/Whiteboard/Whiteboard.BanUser.cs

@@ -1,18 +0,0 @@
-using AipsCore.Domain.Common.Validation;
-using AipsCore.Domain.Models.User.ValueObjects;
-using AipsCore.Domain.Models.Whiteboard.Validation;
-
-namespace AipsCore.Domain.Models.Whiteboard;
-
-public partial class Whiteboard
-{
-    public void BanUser(UserId currentUserId, WhiteboardMembership.WhiteboardMembership whiteboardMembership)
-    {
-        if (WhiteboardOwnerId != currentUserId)
-        {
-            throw new ValidationException(WhiteboardErrors.OnlyOwnerCanBanOtherUsers(currentUserId));
-        }
-
-        whiteboardMembership.Ban();
-    }
-}

dotnet/AipsCore/Domain/Models/Whiteboard/Whiteboard.CanUserDelete.cs

@@ -6,6 +6,11 @@ public partial class Whiteboard
 {
     public bool CanUserDelete(UserId userId)
     {
-        return WhiteboardOwnerId.IdValue == userId.IdValue;
+        return IsOwner(userId);
+    }
+
+    public bool ShouldRequestToJoin(UserId userId)
+    {
+        return !IsOwner(userId);
     }
 }

dotnet/AipsCore/Domain/Models/Whiteboard/Whiteboard.KickUser.cs

@@ -1,18 +0,0 @@
-using AipsCore.Domain.Common.Validation;
-using AipsCore.Domain.Models.User.ValueObjects;
-using AipsCore.Domain.Models.Whiteboard.Validation;
-
-namespace AipsCore.Domain.Models.Whiteboard;
-
-public partial class Whiteboard
-{
-    public void KickUser(UserId currentUserId, WhiteboardMembership.WhiteboardMembership whiteboardMembership)
-    {
-        if (WhiteboardOwnerId != currentUserId)
-        {
-            throw new ValidationException(WhiteboardErrors.OnlyOwnerCanKickOtherUsers(currentUserId));
-        }
-
-        whiteboardMembership.Kick();
-    }
-}

dotnet/AipsCore/Domain/Models/Whiteboard/Whiteboard.ManageUsers.cs

@@ -0,0 +1,43 @@
+using AipsCore.Domain.Common.Validation;
+using AipsCore.Domain.Models.User.ValueObjects;
+using AipsCore.Domain.Models.Whiteboard.Validation;
+
+namespace AipsCore.Domain.Models.Whiteboard;
+
+public partial class Whiteboard
+{
+    public void BanUser(UserId currentUserId, WhiteboardMembership.WhiteboardMembership whiteboardMembership)
+    {
+        if (IsOwner(currentUserId))
+        {
+            throw new ValidationException(WhiteboardErrors.OnlyOwnerCanBanOtherUsers(currentUserId));
+        }
+
+        whiteboardMembership.Ban();
+    }
+    
+    public void UnbanUser(UserId currentUserId, WhiteboardMembership.WhiteboardMembership whiteboardMembership)
+    {
+        if (IsOwner(currentUserId))
+        {
+            throw new ValidationException(WhiteboardErrors.OnlyOwnerCanUnbanOtherUsers(currentUserId));
+        }
+
+        whiteboardMembership.Unban();
+    }
+    
+    public void KickUser(UserId currentUserId, WhiteboardMembership.WhiteboardMembership whiteboardMembership)
+    {
+        if (IsOwner(currentUserId))
+        {
+            throw new ValidationException(WhiteboardErrors.OnlyOwnerCanKickOtherUsers(currentUserId));
+        }
+
+        whiteboardMembership.Kick();
+    }
+
+    private bool IsOwner(UserId userId)
+    {
+        return WhiteboardOwnerId.IdValue == userId.IdValue;
+    }
+}

dotnet/AipsCore/Domain/Models/Whiteboard/Whiteboard.UnbanUser.cs

@@ -1,18 +0,0 @@
-using AipsCore.Domain.Common.Validation;
-using AipsCore.Domain.Models.User.ValueObjects;
-using AipsCore.Domain.Models.Whiteboard.Validation;
-
-namespace AipsCore.Domain.Models.Whiteboard;
-
-public partial class Whiteboard
-{
-    public void UnbanUser(UserId currentUserId, WhiteboardMembership.WhiteboardMembership whiteboardMembership)
-    {
-        if (WhiteboardOwnerId != currentUserId)
-        {
-            throw new ValidationException(WhiteboardErrors.OnlyOwnerCanUnbanOtherUsers(currentUserId));
-        }
-
-        whiteboardMembership.Unban();
-    }
-}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/Enums/WhiteboardMembershipStatus.cs

@@ -0,0 +1,13 @@
+namespace AipsCore.Domain.Models.WhiteboardMembership.Enums;
+
+public enum WhiteboardMembershipStatus
+{
+    Pending,
+    Accepted,
+    Active,
+    Inactive,
+    Rejected,
+    Cancelled,
+    Kicked,
+    Banned
+}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/Validation/WhiteboardMembershipErrors.cs

@@ -0,0 +1,18 @@
+using AipsCore.Domain.Abstract.Validation;
+using AipsCore.Domain.Common.Validation;
+using AipsCore.Domain.Models.User.ValueObjects;
+using AipsCore.Domain.Models.Whiteboard.ValueObjects;
+using AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
+
+namespace AipsCore.Domain.Models.WhiteboardMembership.Validation;
+
+public class WhiteboardMembershipErrors : AbstractErrors<WhiteboardMembership, WhiteboardMembershipId>
+{
+    public static ValidationError NotFound(WhiteboardId whiteboardId, UserId userId)
+    {
+        const string code = "whiteboard_membership_not_found";
+        string message = $"Whiteboard membership with whiteboard id {whiteboardId.IdValue} and user id {userId.IdValue} not found.";
+        
+        return CreateValidationError(code, message);
+    }
+}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/ValueObjects/WhiteboardMembershipCanJoin.cs

@@ -1,20 +0,0 @@
-using AipsCore.Domain.Abstract.Rule;
-using AipsCore.Domain.Abstract.ValueObject;
-
-namespace AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
-
-public record WhiteboardMembershipCanJoin : AbstractValueObject
-{
-    public bool CanJoinValue { get; init; }
-
-    public WhiteboardMembershipCanJoin(bool CanJoinValue)
-    {
-        this.CanJoinValue = CanJoinValue;
-        Validate();
-    }
-    
-    protected override ICollection<IRule> GetValidationRules()
-    {
-        return [];
-    }
-}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/ValueObjects/WhiteboardMembershipIsBanned.cs

@@ -1,20 +0,0 @@
-using AipsCore.Domain.Abstract.Rule;
-using AipsCore.Domain.Abstract.ValueObject;
-
-namespace AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
-
-public record WhiteboardMembershipIsBanned : AbstractValueObject
-{
-    public bool IsBannedValue { get; init; }
-
-    public WhiteboardMembershipIsBanned(bool IsBannedValue)
-    {
-        this.IsBannedValue = IsBannedValue;
-        Validate();
-    }
-    
-    protected override ICollection<IRule> GetValidationRules()
-    {
-        return [];
-    }
-}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/WhiteboardMembership.Ban.cs

@@ -1,11 +0,0 @@
-using AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
-
-namespace AipsCore.Domain.Models.WhiteboardMembership;
-
-public partial class WhiteboardMembership
-{
-    public void Ban()
-    {
-        IsBanned = new WhiteboardMembershipIsBanned(true);
-    }
-}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/WhiteboardMembership.Kick.cs

@@ -1,11 +0,0 @@
-using AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
-
-namespace AipsCore.Domain.Models.WhiteboardMembership;
-
-public partial class WhiteboardMembership
-{
-    public void Kick()
-    {
-        CanJoin = new WhiteboardMembershipCanJoin(false);
-    }
-}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/WhiteboardMembership.Status.cs

@@ -0,0 +1,26 @@
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+
+namespace AipsCore.Domain.Models.WhiteboardMembership;
+
+public partial class WhiteboardMembership
+{
+    public void Ban()
+    {
+        Status = WhiteboardMembershipStatus.Banned;
+    }
+    
+    public void Unban()
+    {
+        Status = WhiteboardMembershipStatus.Cancelled;
+    }
+    
+    public void Kick()
+    {
+        Status = WhiteboardMembershipStatus.Kicked;
+    }
+
+    public void UpdateStatus(WhiteboardMembershipStatus newStatus)
+    {
+        Status = newStatus;
+    }
+}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/WhiteboardMembership.Unban.cs

@@ -1,11 +0,0 @@
-using AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
-
-namespace AipsCore.Domain.Models.WhiteboardMembership;
-
-public partial class WhiteboardMembership
-{
-    public void Unban()
-    {
-        IsBanned = new WhiteboardMembershipIsBanned(false);
-    }
-}

dotnet/AipsCore/Domain/Models/WhiteboardMembership/WhiteboardMembership.cs

@@ -1,6 +1,7 @@
 using AipsCore.Domain.Abstract;
 using AipsCore.Domain.Models.User.ValueObjects;
 using AipsCore.Domain.Models.Whiteboard.ValueObjects;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
 using AipsCore.Domain.Models.WhiteboardMembership.ValueObjects;
 
 namespace AipsCore.Domain.Models.WhiteboardMembership;
@@ -9,97 +10,84 @@ public partial class WhiteboardMembership : DomainModel<WhiteboardMembershipId>
 {
     public WhiteboardId WhiteboardId { get; private set; }
     public UserId UserId { get; private set; }
-    public WhiteboardMembershipIsBanned IsBanned { get; private set; }
     public WhiteboardMembershipEditingEnabled EditingEnabled { get; private set; }
-    public WhiteboardMembershipCanJoin CanJoin { get; private set; }
+    public WhiteboardMembershipStatus Status { get; private set; }
     public WhiteboardMembershipLastInteractedAt LastInteractedAt { get; private set; }
 
     public WhiteboardMembership(
         WhiteboardMembershipId id,
-        Whiteboard.Whiteboard owner, 
+        Whiteboard.Whiteboard whiteboard, 
         User.User user,
-        WhiteboardMembershipIsBanned isBanned,
         WhiteboardMembershipEditingEnabled editingEnabled,
-        WhiteboardMembershipCanJoin canJoin,
+        WhiteboardMembershipStatus status,
         WhiteboardMembershipLastInteractedAt lastInteractedAt)
         : base(id)
     {
-        WhiteboardId = owner.Id;
+        WhiteboardId = whiteboard.Id;
         UserId = user.Id;
-        IsBanned = isBanned;
         EditingEnabled = editingEnabled;
-        CanJoin = canJoin;
+        Status = status;
         LastInteractedAt = lastInteractedAt;
     }
     
     public WhiteboardMembership(
         WhiteboardMembershipId id,
-        WhiteboardId ownerId, 
+        WhiteboardId whiteboardId, 
         UserId userId,
-        WhiteboardMembershipIsBanned isBanned,
         WhiteboardMembershipEditingEnabled editingEnabled,
-        WhiteboardMembershipCanJoin canJoin,
+        WhiteboardMembershipStatus status,
         WhiteboardMembershipLastInteractedAt lastInteractedAt)
         : base(id)
     {
-        WhiteboardId = ownerId;
+        WhiteboardId = whiteboardId;
         UserId = userId;
-        IsBanned = isBanned;
         EditingEnabled = editingEnabled;
-        CanJoin = canJoin;
+        Status = status;
         LastInteractedAt = lastInteractedAt;
     }
     
     public static WhiteboardMembership Create(
         string id, 
-        string ownerId,
+        string whiteboardId,
         string userId,
-        bool isBanned,
         bool editingEnabled,
-        bool canJoin,
+        WhiteboardMembershipStatus status,
         DateTime lastInteractedAt)
     {
         var whiteboardMembershipId = new WhiteboardMembershipId(id);
-        var whiteboardId = new WhiteboardId(ownerId);
+        var whiteboardIdVo = new WhiteboardId(whiteboardId);
         var userIdVo = new UserId(userId);
-        var isBannedVo = new WhiteboardMembershipIsBanned(isBanned);
         var editingEnabledVo = new WhiteboardMembershipEditingEnabled(editingEnabled);
-        var canJoinVo = new WhiteboardMembershipCanJoin(canJoin);
         var lastInteractedAtVo = new WhiteboardMembershipLastInteractedAt(lastInteractedAt);
         
         return new WhiteboardMembership(
             whiteboardMembershipId, 
-            whiteboardId, 
+            whiteboardIdVo, 
             userIdVo,
-            isBannedVo, 
             editingEnabledVo, 
-            canJoinVo, 
+            status,
             lastInteractedAtVo);
     }
     
     public static WhiteboardMembership Create(
-        string ownerId,
+        string whiteboardId,
         string userId,
-        bool isBanned,
         bool editingEnabled,
-        bool canJoin,
+        WhiteboardMembershipStatus status,
         DateTime lastInteractedAt)
     {
         var whiteboardMembershipId = WhiteboardMembershipId.Any();
-        var whiteboardId = new WhiteboardId(ownerId);
+        var whiteboardIdVo = new WhiteboardId(whiteboardId);
         var userIdVo = new UserId(userId);
-        var isBannedVo = new WhiteboardMembershipIsBanned(isBanned);
         var editingEnabledVo = new WhiteboardMembershipEditingEnabled(editingEnabled);
-        var canJoinVo = new WhiteboardMembershipCanJoin(canJoin);
         var lastInteractedAtVo = new WhiteboardMembershipLastInteractedAt(lastInteractedAt);
         
         return new WhiteboardMembership(
             whiteboardMembershipId, 
-            whiteboardId, 
+            whiteboardIdVo, 
             userIdVo, 
-            isBannedVo, 
             editingEnabledVo, 
-            canJoinVo, 
+            status,
             lastInteractedAtVo);
     }
 }

dotnet/AipsCore/Infrastructure/Authentication/AuthService/EfAuthService.cs

@@ -10,12 +10,10 @@ namespace AipsCore.Infrastructure.Authentication.AuthService;
 
 public class EfAuthService : IAuthService
 {
-    private readonly AipsDbContext _dbContext;
     private readonly UserManager<Persistence.User.User> _userManager;
     
-    public EfAuthService(AipsDbContext dbContext, UserManager<Persistence.User.User> userManager)
+    public EfAuthService(UserManager<Persistence.User.User> userManager)
     {
-        _dbContext = dbContext;
         _userManager = userManager;
     }
     
@@ -27,8 +25,8 @@ public class EfAuthService : IAuthService
         
         if (!result.Succeeded)
         {
-            var errors = string.Join(", ", result.Errors.Select(e => e.Description));
-            throw new Exception($"User registration failed: {errors}");
+            var validationErrors = result.Errors.Select(e => new ValidationError(e.Code, e.Description)).ToList();
+            throw new ValidationException(validationErrors);
         }
         
         await _userManager.AddToRoleAsync(entity, UserRole.User.Name);

dotnet/AipsCore/Infrastructure/Persistence/Db/Migrations/20260226153018_ReworkedMembership.Designer.cs

@@ -0,0 +1,503 @@
+// <auto-generated />
+using System;
+using AipsCore.Infrastructure.Persistence.Db;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace AipsCore.Infrastructure.Persistence.Db.Migrations
+{
+    [DbContext(typeof(AipsDbContext))]
+    [Migration("20260226153018_ReworkedMembership")]
+    partial class ReworkedMembership
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "10.0.2")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.RefreshToken.RefreshToken", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<DateTime>("ExpiresAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Token")
+                        .IsRequired()
+                        .HasMaxLength(255)
+                        .HasColumnType("character varying(255)");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("RefreshTokens");
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.Shape.Shape", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid>("AuthorId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Color")
+                        .IsRequired()
+                        .HasMaxLength(10)
+                        .HasColumnType("character varying(10)");
+
+                    b.Property<int?>("EndPositionX")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("EndPositionY")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("PositionX")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("PositionY")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("TextSize")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("TextValue")
+                        .HasColumnType("text");
+
+                    b.Property<int?>("Thickness")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("Type")
+                        .HasColumnType("integer");
+
+                    b.Property<Guid>("WhiteboardId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AuthorId");
+
+                    b.HasIndex("WhiteboardId");
+
+                    b.ToTable("Shapes");
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.User.User", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("text");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime?>("DeletedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("boolean");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex");
+
+                    b.ToTable("AspNetUsers", (string)null);
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.Whiteboard.Whiteboard", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Code")
+                        .IsRequired()
+                        .HasMaxLength(8)
+                        .HasColumnType("character varying(8)");
+
+                    b.Property<DateTime>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTime?>("DeletedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("JoinPolicy")
+                        .HasColumnType("integer");
+
+                    b.Property<int>("MaxParticipants")
+                        .HasColumnType("integer");
+
+                    b.Property<Guid>("OwnerId")
+                        .HasColumnType("uuid");
+
+                    b.Property<int>("State")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasMaxLength(32)
+                        .HasColumnType("character varying(32)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OwnerId");
+
+                    b.ToTable("Whiteboards");
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.WhiteboardMembership.WhiteboardMembership", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<bool>("EditingEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTime>("LastInteractedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid>("WhiteboardId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.HasIndex("WhiteboardId");
+
+                    b.ToTable("WhiteboardMemberships");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRole<System.Guid>", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex");
+
+                    b.ToTable("AspNetRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("text");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("text");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("text");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid>("RoleId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("text");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens", (string)null);
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.RefreshToken.RefreshToken", b =>
+                {
+                    b.HasOne("AipsCore.Infrastructure.Persistence.User.User", "User")
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.Shape.Shape", b =>
+                {
+                    b.HasOne("AipsCore.Infrastructure.Persistence.User.User", "Author")
+                        .WithMany("Shapes")
+                        .HasForeignKey("AuthorId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("AipsCore.Infrastructure.Persistence.Whiteboard.Whiteboard", "Whiteboard")
+                        .WithMany("Shapes")
+                        .HasForeignKey("WhiteboardId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Author");
+
+                    b.Navigation("Whiteboard");
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.Whiteboard.Whiteboard", b =>
+                {
+                    b.HasOne("AipsCore.Infrastructure.Persistence.User.User", "Owner")
+                        .WithMany("Whiteboards")
+                        .HasForeignKey("OwnerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Owner");
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.WhiteboardMembership.WhiteboardMembership", b =>
+                {
+                    b.HasOne("AipsCore.Infrastructure.Persistence.User.User", "User")
+                        .WithMany("Memberships")
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("AipsCore.Infrastructure.Persistence.Whiteboard.Whiteboard", "Whiteboard")
+                        .WithMany("Memberships")
+                        .HasForeignKey("WhiteboardId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("User");
+
+                    b.Navigation("Whiteboard");
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<System.Guid>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole<System.Guid>", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<System.Guid>", b =>
+                {
+                    b.HasOne("AipsCore.Infrastructure.Persistence.User.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<System.Guid>", b =>
+                {
+                    b.HasOne("AipsCore.Infrastructure.Persistence.User.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<System.Guid>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole<System.Guid>", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("AipsCore.Infrastructure.Persistence.User.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<System.Guid>", b =>
+                {
+                    b.HasOne("AipsCore.Infrastructure.Persistence.User.User", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.User.User", b =>
+                {
+                    b.Navigation("Memberships");
+
+                    b.Navigation("Shapes");
+
+                    b.Navigation("Whiteboards");
+                });
+
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.Whiteboard.Whiteboard", b =>
+                {
+                    b.Navigation("Memberships");
+
+                    b.Navigation("Shapes");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

dotnet/AipsCore/Infrastructure/Persistence/Db/Migrations/20260226153018_ReworkedMembership.cs

@@ -0,0 +1,51 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace AipsCore.Infrastructure.Persistence.Db.Migrations
+{
+    /// <inheritdoc />
+    public partial class ReworkedMembership : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "CanJoin",
+                table: "WhiteboardMemberships");
+
+            migrationBuilder.DropColumn(
+                name: "IsBanned",
+                table: "WhiteboardMemberships");
+
+            migrationBuilder.AddColumn<int>(
+                name: "Status",
+                table: "WhiteboardMemberships",
+                type: "integer",
+                nullable: false,
+                defaultValue: 0);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Status",
+                table: "WhiteboardMemberships");
+
+            migrationBuilder.AddColumn<bool>(
+                name: "CanJoin",
+                table: "WhiteboardMemberships",
+                type: "boolean",
+                nullable: false,
+                defaultValue: false);
+
+            migrationBuilder.AddColumn<bool>(
+                name: "IsBanned",
+                table: "WhiteboardMemberships",
+                type: "boolean",
+                nullable: false,
+                defaultValue: false);
+        }
+    }
+}

dotnet/AipsCore/Infrastructure/Persistence/Db/Migrations/AipsDbContextModelSnapshot.cs

@@ -22,7 +22,7 @@ namespace AipsCore.Infrastructure.Persistence.Db.Migrations
 
             NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
 
-            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.Authentication.RefreshToken.RefreshToken", b =>
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.RefreshToken.RefreshToken", b =>
                 {
                     b.Property<Guid>("Id")
                         .ValueGeneratedOnAdd()
@@ -214,18 +214,15 @@ namespace AipsCore.Infrastructure.Persistence.Db.Migrations
                         .ValueGeneratedOnAdd()
                         .HasColumnType("uuid");
 
-                    b.Property<bool>("CanJoin")
-                        .HasColumnType("boolean");
-
                     b.Property<bool>("EditingEnabled")
                         .HasColumnType("boolean");
 
-                    b.Property<bool>("IsBanned")
-                        .HasColumnType("boolean");
-
                     b.Property<DateTime>("LastInteractedAt")
                         .HasColumnType("timestamp with time zone");
 
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
                     b.Property<Guid>("UserId")
                         .HasColumnType("uuid");
 
@@ -371,7 +368,7 @@ namespace AipsCore.Infrastructure.Persistence.Db.Migrations
                     b.ToTable("AspNetUserTokens", (string)null);
                 });
 
-            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.Authentication.RefreshToken.RefreshToken", b =>
+            modelBuilder.Entity("AipsCore.Infrastructure.Persistence.RefreshToken.RefreshToken", b =>
                 {
                     b.HasOne("AipsCore.Infrastructure.Persistence.User.User", "User")
                         .WithMany()

dotnet/AipsCore/Infrastructure/Persistence/Whiteboard/WhiteboardRepository.cs

@@ -58,11 +58,18 @@ public class WhiteboardRepository
         entity.State = model.State;
     }
     
-    public async Task<bool> WhiteboardCodeExists(WhiteboardCode whiteboardCode)
+    public async Task<bool> WhiteboardCodeExistsAsync(WhiteboardCode whiteboardCode)
     {
         return await Context.Whiteboards.AnyAsync(w => w.Code == whiteboardCode.CodeValue);
     }
 
+    public async Task<Domain.Models.Whiteboard.Whiteboard?> GetByCodeAsync(WhiteboardCode whiteboardCode, CancellationToken cancellationToken = default)
+    {
+        var entity = await Context.Whiteboards.FirstOrDefaultAsync(w => w.Code == whiteboardCode.CodeValue, cancellationToken);
+
+        return entity != null ? MapToModel(entity) : null;
+    }
+
     public async Task SoftDeleteAsync(WhiteboardId id, CancellationToken cancellationToken = default)
     {
         var entity = await Context.Whiteboards.FindAsync([new Guid(id.IdValue)], cancellationToken);

dotnet/AipsCore/Infrastructure/Persistence/WhiteboardMembership/WhiteboardMembership.cs

@@ -1,4 +1,5 @@
 using System.ComponentModel.DataAnnotations;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
 
 namespace AipsCore.Infrastructure.Persistence.WhiteboardMembership;
 
@@ -15,11 +16,9 @@ public class WhiteboardMembership
 
     public User.User? User { get; set; } = null!;
     
-    public bool IsBanned { get; set; }
-    
     public bool EditingEnabled { get; set; }
     
-    public bool CanJoin { get; set; }
+    public WhiteboardMembershipStatus Status { get; set; }
     
     public DateTime LastInteractedAt { get; set; }
 }

dotnet/AipsCore/Infrastructure/Persistence/WhiteboardMembership/WhiteboardMembershipRepository.cs

@@ -24,9 +24,8 @@ public class WhiteboardMembershipRepository
             entity.Id.ToString(),
             entity.WhiteboardId.ToString(),
             entity.UserId.ToString(),
-            entity.IsBanned,
             entity.EditingEnabled,
-            entity.CanJoin,
+            entity.Status,
             entity.LastInteractedAt
         );
     }
@@ -38,18 +37,16 @@ public class WhiteboardMembershipRepository
             Id = new Guid(model.Id.IdValue),
             WhiteboardId = new Guid(model.WhiteboardId.IdValue),
             UserId = new Guid(model.UserId.IdValue),
-            IsBanned = model.IsBanned.IsBannedValue,
             EditingEnabled = model.EditingEnabled.EditingEnabledValue,
-            CanJoin = model.CanJoin.CanJoinValue,
+            Status = model.Status,
             LastInteractedAt = model.LastInteractedAt.LastInteractedAtValue
         };
     }
 
     protected override void UpdateEntity(WhiteboardMembership entity, Domain.Models.WhiteboardMembership.WhiteboardMembership model)
     {
-        entity.IsBanned = model.IsBanned.IsBannedValue;
         entity.EditingEnabled = model.EditingEnabled.EditingEnabledValue;
-        entity.CanJoin = model.CanJoin.CanJoinValue;
+        entity.Status = model.Status;
         entity.LastInteractedAt = model.LastInteractedAt.LastInteractedAtValue;
     }
 

dotnet/AipsRT/Hubs/WhiteboardHub.cs

@@ -1,6 +1,12 @@
-using AipsCore.Application.Abstract.MessageBroking;
-using AipsCore.Application.Common.Message.MoveShape;
+using AipsCore.Application.Abstract;
 using AipsCore.Application.Models.Shape.Command.MoveShape;
+using AipsCore.Application.Models.Whiteboard.Command.AcceptUserRequestToJoin;
+using AipsCore.Application.Models.Whiteboard.Command.RejectUserRequestToJoin;
+using AipsCore.Application.Models.Whiteboard.Command.UserCanceledRequestToJoin;
+using AipsCore.Application.Models.Whiteboard.Query.GetMembershipStatus;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+using AipsRT.Model.Memberships;
+using AipsRT.Model.Users;
 using AipsRT.Model.Whiteboard;
 using AipsRT.Model.Whiteboard.Shapes;
 using AipsRT.Model.Whiteboard.Structs;
@@ -15,33 +21,147 @@ public class WhiteboardHub : Hub
 {
     private readonly WhiteboardManager _whiteboardManager;
     private readonly IMessagingService _messagingService;
+    private readonly MembershipService _membershipService;
+    private readonly UserService _userService;
 
-    public WhiteboardHub(WhiteboardManager whiteboardManager, IMessagingService messagingService)
+    public WhiteboardHub(WhiteboardManager whiteboardManager, IMessagingService messagingService, MembershipService membershipService, UserService userService)
     {
         _whiteboardManager = whiteboardManager;
         _messagingService = messagingService;
+        _membershipService = membershipService;
+        _userService = userService;
+    }
+
+    public override async Task OnDisconnectedAsync(Exception? exception)
+    {
+        var userId = CurrentUserId;
+        var whiteboard = _whiteboardManager.GetWhiteboardForUser(userId);
+
+        if (whiteboard != null)
+        {
+            whiteboard.RemoveActiveUser(userId);
+            _whiteboardManager.RemoveUserFromWhiteboard(userId);
+
+            await Clients.Group(whiteboard.WhiteboardId.ToString())
+                .SendAsync("Leaved", userId.ToString());
+        }
+
+        await base.OnDisconnectedAsync(exception);
     }
     
     public async Task JoinWhiteboard(Guid whiteboardId)
     {
         if (!_whiteboardManager.WhiteboardExists(whiteboardId))
-            await _whiteboardManager.AddWhiteboard(whiteboardId);
+        {
+            await _whiteboardManager.LoadWhiteboard(whiteboardId);
+        }
         
         await Groups.AddToGroupAsync(Context.ConnectionId, whiteboardId.ToString());
 
-        var state = _whiteboardManager.GetWhiteboard(whiteboardId)!;
+        var whiteboard = _whiteboardManager.GetWhiteboard(whiteboardId)!;
         
-        _whiteboardManager.AddUserToWhiteboard(Guid.Parse(Context.UserIdentifier!), whiteboardId);
+        var userId = CurrentUserId;
+        var ownerId = whiteboard.OwnerId;
         
-        await Clients.Caller.SendAsync("InitWhiteboard", state);
-        await Clients.GroupExcept(whiteboardId.ToString(), Context.ConnectionId)
-            .SendAsync("Joined", Context.UserIdentifier!);
+        WhiteboardMembershipStatus status;
+
+        if (userId == ownerId)
+        {
+            status = WhiteboardMembershipStatus.Accepted;
+        }
+        else
+        {
+            status = await _membershipService.GetMembershipStatus(whiteboardId, userId);
+        }
+        
+        _whiteboardManager.AddUserToWhiteboard(userId, whiteboardId);
+        
+        if (status == WhiteboardMembershipStatus.Accepted)
+        {
+
+            var joiningUser = whiteboard.Users.FirstOrDefault(u => u.UserId == userId);
+            if (joiningUser == null)
+            {
+                if (ownerId == userId)
+                {
+                    joiningUser = whiteboard.Owner;
+                }
+                else
+                {
+                    joiningUser = new User(userId, Context.User?.Identity?.Name ?? "Unknown", "");
+                    whiteboard.AddUser(joiningUser);
+                }
+            }
+            whiteboard.AddActiveUser(joiningUser);
+
+            var state = _whiteboardManager.GetWhiteboard(whiteboardId)!;
+            await Clients.Caller.SendAsync("InitWhiteboard", state);
+
+            await Clients.GroupExcept(whiteboardId.ToString(),
+                Context.ConnectionId).SendAsync("Joined", joiningUser);
+        }
+        else
+        {
+            await Clients.Caller.SendAsync("WaitingForApproval", userId.ToString());
+            
+            var user = whiteboard.Users.FirstOrDefault(u => u.UserId == userId);
+            
+            if (user == null)
+            {
+                user = await _userService.GetUser(userId);
+            }
+
+            await Clients.User(ownerId.ToString()).SendAsync("UserWaitingForApproval", user);
+        }
+    }
+
+    public async Task AcceptUser(Guid targetUserId)
+    {
+        var whiteboard = CurrentWhiteboard;
+
+        await _messagingService.AcceptedUser(new AcceptUserRequestToJoinCommand(whiteboard.WhiteboardId.ToString(), targetUserId.ToString()));
+        
+        var user = whiteboard.Users.FirstOrDefault(u => u.UserId == targetUserId);
+        
+        whiteboard.AddActiveUser(user!);
+        
+        await Clients.User(targetUserId.ToString()).SendAsync("Accepted");
+        await Clients.User(targetUserId.ToString()).SendAsync("InitWhiteboard", whiteboard);
+
+        await Clients.GroupExcept(whiteboard.WhiteboardId.ToString(),
+            Context.ConnectionId).SendAsync("Joined", user);
+    }
+    
+    public async Task RejectUser(Guid targetUserId)
+    {
+        var whiteboard = CurrentWhiteboard;
+
+        await _messagingService.RejectedUser(new RejectUserRequestToJoinCommand(whiteboard.WhiteboardId.ToString(), targetUserId.ToString()));
+        
+        await Clients.User(targetUserId.ToString()).SendAsync("Rejected");
+    }
+    
+    public async Task CancelJoinRequest()
+    {
+        var userId = CurrentUserId;
+        var whiteboard = _whiteboardManager.GetWhiteboardForUser(userId);
+
+        if (whiteboard != null)
+        {
+            await _messagingService.CancelJoinRequest(new UserCanceledRequestToJoinCommand(whiteboard.WhiteboardId.ToString(), userId.ToString()));
+            await Clients.User(whiteboard.OwnerId.ToString()).SendAsync("UserCanceledJoinRequest", userId.ToString());
+        }
     }
 
     public async Task LeaveWhiteboard(Guid whiteboardId)
     {
+        var userId = CurrentUserId;
+        _whiteboardManager.RemoveUserFromWhiteboard(userId);
+        _whiteboardManager.GetWhiteboard(whiteboardId)?.RemoveActiveUser(userId);
+
         await Clients.GroupExcept(whiteboardId.ToString(), Context.ConnectionId)
             .SendAsync("Leaved", Context.UserIdentifier!);
+
     }
 
     private Guid CurrentUserId => Guid.Parse(Context.UserIdentifier!);
@@ -127,6 +247,6 @@ public class WhiteboardHub : Hub
     {
         await MoveShape(moveShape);
         
-        await _messagingService.MoveShape(moveShape);
+        await _messagingService.MoveShape(CurrentWhiteboard.WhiteboardId, moveShape);
     }
 }

dotnet/AipsRT/Model/Memberships/MembershipService.cs

@@ -0,0 +1,21 @@
+using AipsCore.Application.Abstract;
+using AipsCore.Application.Models.Whiteboard.Query.GetMembershipStatus;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
+
+namespace AipsRT.Model.Memberships;
+
+public class MembershipService
+{
+    private readonly IDispatcher _dispatcher;
+
+    public MembershipService(IDispatcher dispatcher)
+    {
+        _dispatcher = dispatcher;
+    }
+
+    public async Task<WhiteboardMembershipStatus> GetMembershipStatus(Guid whiteboardId, Guid userId)
+    {
+        var query = new GetMembershipStatusQuery(whiteboardId.ToString(), userId.ToString());
+        return await _dispatcher.Execute(query);
+    }
+}

dotnet/AipsRT/Model/Users/User.cs

@@ -0,0 +1,17 @@
+namespace AipsRT.Model.Users;
+
+public class User
+{
+    public Guid UserId { get; private set; }
+
+    public string Username { get; private set; } 
+
+    public string Email { get; private set; }
+    
+    public User(Guid userId, string username, string email)
+    {
+        UserId = userId;
+        Username = username;
+        Email = email;
+    }
+}

dotnet/AipsRT/Model/Users/UserService.cs

@@ -0,0 +1,23 @@
+using AipsCore.Application.Abstract;
+using AipsCore.Application.Models.User.Query.GetUser;
+using AipsCore.Application.Models.Whiteboard.Command.UserCanceledRequestToJoin;
+
+namespace AipsRT.Model.Users;
+
+public class UserService
+{
+    private readonly IDispatcher _dispatcher;
+    
+    public UserService(IDispatcher dispatcher)
+    {
+        _dispatcher = dispatcher;
+    }
+
+    public async Task<User> GetUser(Guid userId)
+    {
+        var query = new GetUserQuery(userId.ToString());
+        var userQueryDto = await _dispatcher.Execute(query);
+        
+        return new User(Guid.Parse(userQueryDto.Id), userQueryDto.UserName, userQueryDto.Email);
+    }
+}

dotnet/AipsRT/Model/Whiteboard/GetWhiteboardService.cs

@@ -1,7 +1,9 @@
 using AipsCore.Application.Abstract;
 using AipsCore.Application.Models.Whiteboard.Query.GetWhiteboardInfoRT;
 using AipsCore.Domain.Models.Shape.Enums;
+using AipsCore.Domain.Models.WhiteboardMembership.Enums;
 using AipsRT.Model.Whiteboard.Shapes.Map;
+using AipsRT.Model.Users;
 
 namespace AipsRT.Model.Whiteboard;
 
@@ -26,8 +28,15 @@ public class GetWhiteboardService
         {
             WhiteboardId = entity.Id,
             OwnerId = entity.OwnerId,
+            Owner = new User(entity.Owner.Id, entity.Owner.UserName!, entity.Owner.Email!),
+            Code = entity.Code,
         };
 
+        foreach (var membership in entity.Memberships)
+        {
+            whiteboard.AddUser(new User(membership.UserId, membership.User!.UserName!, membership.User.Email!));
+        }
+
         foreach (var shape in entity.Shapes)
         {
             switch (shape.Type)

dotnet/AipsRT/Model/Whiteboard/Whiteboard.cs

@@ -1,4 +1,5 @@
 using AipsRT.Model.Whiteboard.Shapes;
+using AipsRT.Model.Users;
 
 namespace AipsRT.Model.Whiteboard;
 
@@ -7,6 +8,15 @@ public class Whiteboard
     public Guid WhiteboardId { get; set; }
 
     public Guid OwnerId { get; set; }
+    public User Owner { get; set; } = null!;
+    
+    public string Code {get; set;}
+
+    public List<User> Users { get; } = [];
+
+    public List<User> ActiveUsers { get; } = [];
+    public void AddActiveUser(User user) => ActiveUsers.Add(user);
+    public void RemoveActiveUser(Guid userId) => ActiveUsers.RemoveAll(u => u.UserId == userId);
     
     public List<Shape> Shapes { get; } = [];
 
@@ -38,4 +48,12 @@ public class Whiteboard
         Shapes.Add(shape);
         TextShapes.Add(shape);
     }
+
+    public void AddUser(User user)
+    {
+        if (!Users.Contains(user))
+        {
+            Users.Add(user);
+        }
+    }
 }

dotnet/AipsRT/Model/Whiteboard/WhiteboardManager.cs

@@ -14,7 +14,7 @@ public class WhiteboardManager
         _scopeFactory = scopeFactory;
     }
 
-    public async Task AddWhiteboard(Guid whiteboardId)
+    public async Task LoadWhiteboard(Guid whiteboardId)
     {
         var getWhiteboardService = _scopeFactory.CreateScope().ServiceProvider.GetRequiredService<GetWhiteboardService>();
         var whiteboard = await getWhiteboardService.GetWhiteboard(whiteboardId);
@@ -47,9 +47,9 @@ public class WhiteboardManager
         return _userInWhiteboards[userId];
     }
 
-    public void RemoveUserFromWhiteboard(Guid userId, Guid whiteboardId)
+    public void RemoveUserFromWhiteboard(Guid userId)
     {
-        _userInWhiteboards.TryRemove(whiteboardId, out _);
+        _userInWhiteboards.TryRemove(userId, out _);
     }
 
     public Whiteboard? GetWhiteboardForUser(Guid userId)

dotnet/AipsRT/Program.cs

@@ -1,12 +1,18 @@
+using AipsCore.Application.Common.Message.ErrorMessage;
 using AipsCore.Infrastructure.DI;
 using AipsRT.Hubs;
+using AipsRT.Model.Memberships;
+using AipsRT.Model.Users;
 using AipsRT.Model.Whiteboard;
 using AipsRT.Services;
 using AipsRT.Services.Interfaces;
 using DotNetEnv;
 using Microsoft.AspNetCore.SignalR;
 
-Env.Load("../../.env");
+if (File.Exists("../../.env"))
+{
+    Env.Load("../../.env");
+}
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -15,6 +21,13 @@ builder.Configuration.AddEnvironmentVariables();
 builder.Services.AddSignalR();
 
 builder.Services.AddAips(builder.Configuration);
+builder.Services.AddAipsMessageHandlers();
+
+builder.Services.AddSingleton<IErrorMessageHandleStrategy, RtErrorHandleStrategy>();
+builder.Services.AddHostedService<ErrorSubscriberBackgroundService>();
+
+builder.Services.AddTransient<MembershipService>();
+builder.Services.AddTransient<UserService>();
 
 builder.Services.AddScoped<GetWhiteboardService>();
 builder.Services.AddSingleton<WhiteboardManager>();

dotnet/AipsRT/Services/ErrorSubscriberBackgroundService.cs

@@ -0,0 +1,25 @@
+using AipsCore.Application.Abstract;
+using AipsCore.Application.Abstract.MessageBroking;
+using AipsCore.Application.Common.Message.ErrorMessage;
+
+namespace AipsRT.Services;
+
+public class ErrorSubscriberBackgroundService : BackgroundService
+{
+    private readonly IMessageSubscriber _subscriber;
+    private readonly IDispatcher _dispatcher;
+
+    public ErrorSubscriberBackgroundService(IMessageSubscriber subscriber, IDispatcher dispatcher)
+    {
+        _subscriber = subscriber;
+        _dispatcher = dispatcher;
+    }
+    
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        await _subscriber.SubscribeAsync<ErrorMessage>(async (errorMessage, ct) =>
+        {
+            await _dispatcher.Execute(errorMessage, ct);
+        });
+    }
+}

dotnet/AipsRT/Services/Interfaces/IMessagingService.cs

@@ -1,5 +1,8 @@
 using AipsCore.Application.Models.Shape.Command.CreateTextShape;
 using AipsCore.Application.Models.Shape.Command.MoveShape;
+using AipsCore.Application.Models.Whiteboard.Command.AcceptUserRequestToJoin;
+using AipsCore.Application.Models.Whiteboard.Command.RejectUserRequestToJoin;
+using AipsCore.Application.Models.Whiteboard.Command.UserCanceledRequestToJoin;
 using AipsRT.Model.Whiteboard.Shapes;
 
 namespace AipsRT.Services.Interfaces;
@@ -11,5 +14,9 @@ public interface IMessagingService
     Task CreateLine(Guid whiteboardId, Line line);
     Task CreateTextShape(Guid whiteboardId, TextShape textShape);
     
-    Task MoveShape(MoveShapeCommand moveShape);
+    Task MoveShape(Guid whiteboardId, MoveShapeCommand moveShape);
+    
+    Task AcceptedUser(AcceptUserRequestToJoinCommand command);
+    Task RejectedUser(RejectUserRequestToJoinCommand command);
+    Task CancelJoinRequest(UserCanceledRequestToJoinCommand command);
 }

dotnet/AipsRT/Services/MessagingService.cs

@@ -1,14 +1,20 @@
 using AipsCore.Application.Abstract.MessageBroking;
+using AipsCore.Application.Common.Message.AcceptUserRequestToJoin;
 using AipsCore.Application.Common.Message.AddArrow;
 using AipsCore.Application.Common.Message.AddLine;
 using AipsCore.Application.Common.Message.AddRectangle;
 using AipsCore.Application.Common.Message.AddTextShape;
 using AipsCore.Application.Common.Message.MoveShape;
+using AipsCore.Application.Common.Message.RejectUserRequestToJoin;
+using AipsCore.Application.Common.Message.UserCanceledRequestToJoin;
 using AipsCore.Application.Models.Shape.Command.CreateArrow;
 using AipsCore.Application.Models.Shape.Command.CreateLine;
 using AipsCore.Application.Models.Shape.Command.CreateRectangle;
 using AipsCore.Application.Models.Shape.Command.CreateTextShape;
 using AipsCore.Application.Models.Shape.Command.MoveShape;
+using AipsCore.Application.Models.Whiteboard.Command.AcceptUserRequestToJoin;
+using AipsCore.Application.Models.Whiteboard.Command.RejectUserRequestToJoin;
+using AipsCore.Application.Models.Whiteboard.Command.UserCanceledRequestToJoin;
 using AipsRT.Model.Whiteboard.Shapes;
 using AipsRT.Services.Interfaces;
 
@@ -95,9 +101,27 @@ public class MessagingService : IMessagingService
         await _messagePublisher.PublishAsync(message);
     }
 
-    public async Task MoveShape(MoveShapeCommand moveShape)
+    public async Task MoveShape(Guid whiteboardId, MoveShapeCommand moveShape)
     {
-        var message = new MoveShapeMessage(moveShape);
+        var message = new MoveShapeMessage(whiteboardId, moveShape);
+        await _messagePublisher.PublishAsync(message);
+    }
+
+    public async Task AcceptedUser(AcceptUserRequestToJoinCommand command)
+    {
+        var message = new AcceptUserRequestToJoinMessage(command);
+        await _messagePublisher.PublishAsync(message);
+    }
+
+    public async Task RejectedUser(RejectUserRequestToJoinCommand command)
+    {
+        var message = new RejectUserRequestToJoinMessage(command);
+        await _messagePublisher.PublishAsync(message);   
+    }
+
+    public async Task CancelJoinRequest(UserCanceledRequestToJoinCommand command)
+    {
+        var message = new UserCanceledRequestToJoinMessage(command);
         await _messagePublisher.PublishAsync(message);  
     }
 }

dotnet/AipsRT/Services/RtErrorHandleStrategy.cs

@@ -0,0 +1,36 @@
+using AipsCore.Application.Common.Message.ErrorMessage;
+using AipsRT.Hubs;
+using AipsRT.Model.Whiteboard;
+using Microsoft.AspNetCore.SignalR;
+
+namespace AipsRT.Services;
+
+public class RtErrorHandleStrategy : IErrorMessageHandleStrategy
+{
+    private readonly IHubContext<WhiteboardHub> _hubContext;
+    private readonly WhiteboardManager _whiteboardManager;
+
+    public RtErrorHandleStrategy(IHubContext<WhiteboardHub> hubContext, WhiteboardManager whiteboardManager)
+    {
+        _hubContext = hubContext;
+        _whiteboardManager = whiteboardManager;
+    }
+    
+    public async Task Handle(ErrorMessage message, CancellationToken cancellationToken)
+    {
+        var activeUsers = _whiteboardManager.GetWhiteboard(message.WhiteboardId)!.ActiveUsers;
+        
+        await _whiteboardManager.LoadWhiteboard(message.WhiteboardId);
+        
+        var whiteboard = _whiteboardManager.GetWhiteboard(message.WhiteboardId)!;
+
+        foreach (var user in activeUsers)
+        {
+            whiteboard.AddActiveUser(user);
+        }
+        
+        await _hubContext.Clients
+            .Group(whiteboard.WhiteboardId.ToString())
+            .SendAsync("InitWhiteboard", whiteboard, cancellationToken);
+    }
+}

dotnet/AipsWebApi/Controllers/WhiteboardController.cs

@@ -1,10 +1,10 @@
 using AipsCore.Application.Abstract;
 using AipsCore.Application.Models.Whiteboard.Command.CreateWhiteboard;
 using AipsCore.Application.Models.Whiteboard.Command.DeleteWhiteboard;
+using AipsCore.Application.Models.Whiteboard.Command.JoinWithCode;
 using AipsCore.Application.Models.Whiteboard.Query.GetRecentWhiteboards;
 using AipsCore.Application.Models.Whiteboard.Query.GetWhiteboard;
 using AipsCore.Application.Models.Whiteboard.Query.GetWhiteboardHistory;
-using AipsCore.Application.Models.WhiteboardMembership.Command.CreateWhiteboardMembership;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Whiteboard = AipsCore.Infrastructure.Persistence.Whiteboard.Whiteboard;
@@ -69,7 +69,7 @@ public class WhiteboardController : ControllerBase
 
     [Authorize]
     [HttpPost("join")]
-    public async Task<ActionResult> JoinWhiteboard(CreateWhiteboardMembershipCommand command, CancellationToken cancellationToken)
+    public async Task<ActionResult<JoinWithCodeDto>> JoinWhiteboardWithCode(JoinWithCodeCommand command, CancellationToken cancellationToken)
     {
         var result = await _dispatcher.Execute(command, cancellationToken);
         return Ok(result);

dotnet/AipsWebApi/Program.cs

@@ -3,7 +3,10 @@ using AipsCore.Infrastructure.Persistence.Db;
 using AipsWebApi.Middleware;
 using DotNetEnv;
 
-Env.Load("../../.env");
+if (File.Exists("../../.env"))
+{
+    Env.Load("../../.env");
+}
 
 var builder = WebApplication.CreateBuilder(args);