61 lines
1.5 KiB
Text
61 lines
1.5 KiB
Text
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sequenceDiagram
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participant U1 as User 1
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participant U2 as User 2
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participant F1 as Frontend 1
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participant F2 as Frontend 2
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participant A as API Gateway
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participant C as Chat Server
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participant DB as PostgreSQL
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participant R as Redis
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Note over U1,R: Real-time Chat Flow
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U1->>F1: Open chat interface
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F1->>A: Request chat rooms
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A->>C: GET /api/rooms
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C->>DB: Query user rooms
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DB->>C: Return room list
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C->>F1: Return rooms
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U1->>F1: Select room
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F1->>C: WebSocket connection
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C->>R: Register user session
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C->>F1: Connection established
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U1->>F1: Type message
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F1->>C: WebSocket: SendMessage
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C->>DB: Store message
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DB->>C: Message stored
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C->>R: Update room cache
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C->>F1: Message confirmation
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C->>F2: Broadcast to other users
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U2->>F2: Receive message
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F2->>U2: Display message
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Note over U1,U2: Message Reactions
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U2->>F2: React to message
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F2->>C: WebSocket: AddReaction
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C->>DB: Store reaction
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C->>R: Update cache
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C->>F1: Broadcast reaction
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C->>F2: Reaction confirmation
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Note over U1,U2: Typing Indicators
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U1->>F1: Start typing
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F1->>C: WebSocket: TypingStart
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C->>F2: Broadcast typing indicator
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U1->>F1: Stop typing
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F1->>C: WebSocket: TypingStop
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C->>F2: Remove typing indicator
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Note over U1,U2: Presence Management
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U1->>F1: Go offline
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F1->>C: WebSocket: Disconnect
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C->>R: Remove user session
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C->>F2: Broadcast user offline
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C->>DB: Update last_seen
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