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c0b84a6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | /**
* Real-time Messaging Service using WebSockets
*
* Manages WebSocket connections for real-time message delivery.
* Each user can have a WebSocket connection that receives messages in real-time.
*/
interface MessageSubscriber {
userId: string;
callback: (message: any) => void;
}
interface ActiveConnection {
userId: string;
listeners: Set<(message: any) => void>;
}
class RealtimeMessagingService {
private activeConnections: Map<string, ActiveConnection> = new Map();
private messageSubscribers: MessageSubscriber[] = [];
/**
* Register a new WebSocket connection for a user
*/
registerConnection(userId: string, callback: (message: any) => void): () => void {
if (!this.activeConnections.has(userId)) {
this.activeConnections.set(userId, {
userId,
listeners: new Set(),
});
}
const connection = this.activeConnections.get(userId)!;
connection.listeners.add(callback);
// Return unsubscribe function
return () => {
connection.listeners.delete(callback);
if (connection.listeners.size === 0) {
this.activeConnections.delete(userId);
}
};
}
/**
* Broadcast a message to a specific user
*/
broadcastToUser(userId: string, message: any): void {
const connection = this.activeConnections.get(userId);
if (connection) {
connection.listeners.forEach(callback => {
try {
callback(message);
} catch (error) {
console.error(`Error broadcasting message to user ${userId}:`, error);
}
});
}
}
/**
* Notify both sender and receiver of a new message
*/
notifyMessageSent(message: {
id: string;
sender_id: string;
receiver_id: string;
content: string;
read: boolean;
timestamp: string;
edited_at?: string | null;
}): void {
// Notify receiver
this.broadcastToUser(message.receiver_id, {
type: 'message_received',
data: message,
});
// Notify sender (for UI update confirmation)
this.broadcastToUser(message.sender_id, {
type: 'message_sent',
data: message,
});
}
/**
* Notify user of message read status update
*/
notifyMessageRead(messageId: string, senderId: string): void {
this.broadcastToUser(senderId, {
type: 'message_read',
data: { messageId },
});
}
/**
* Notify user of message edit
*/
notifyMessageEdited(message: {
id: string;
sender_id: string;
receiver_id: string;
content: string;
edited_at: string;
}): void {
this.broadcastToUser(message.receiver_id, {
type: 'message_edited',
data: message,
});
this.broadcastToUser(message.sender_id, {
type: 'message_edited',
data: message,
});
}
/**
* Notify user of message deletion
*/
notifyMessageDeleted(messageId: string, senderId: string, receiverId: string): void {
this.broadcastToUser(receiverId, {
type: 'message_deleted',
data: { messageId },
});
this.broadcastToUser(senderId, {
type: 'message_deleted',
data: { messageId },
});
}
/**
* Get the list of active user IDs
*/
getActiveUsers(): string[] {
return Array.from(this.activeConnections.keys());
}
/**
* Check if a user is currently connected
*/
isUserOnline(userId: string): boolean {
return this.activeConnections.has(userId);
}
/**
* Get number of active connections for a user
*/
getConnectionCount(userId: string): number {
return this.activeConnections.get(userId)?.listeners.size ?? 0;
}
}
export const realtimeMessaging = new RealtimeMessagingService();
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