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import { RealtimeChannel } from '@supabase/supabase-js';
export class SessionSyncService {
private channel?: RealtimeChannel;
private sessionId?: string;
private onParticipantChangeCallback?: (participants: any[]) => void;
/**
* Join a session and announce your presence
*/
async joinSession(sessionId: string, githubUsername: string, peerNumber: number) {
const supabase = getSupabase();
this.sessionId = sessionId;
try {
// Get current user
const { data: { user } } = await supabase.auth.getUser();
if (!user) {
console.error('[SessionSync] No authenticated user');
return;
}
// Insert/update participant record
const { error } = await supabase
.from('session_participants')
.upsert({
session_id: sessionId,
user_id: user.id,
github_username: githubUsername,
peer_number: peerNumber,
joined_at: new Date().toISOString(),
left_at: null
}, {
onConflict: 'session_id,peer_number'
});
if (error) {
console.error('[SessionSync] Failed to announce presence:', error);
return;
}
console.log('[SessionSync] Successfully announced presence:', githubUsername);
// Subscribe to changes
this.subscribeToSession(sessionId);
} catch (err) {
console.error('[SessionSync] Error joining session:', err);
}
}
/**
* Subscribe to participant changes for this session
*/
private subscribeToSession(sessionId: string) {
const supabase = getSupabase();
this.channel = supabase
.channel(`session_${sessionId}`)
.on(
'postgres_changes',
{
event: '*',
schema: 'public',
table: 'session_participants',
filter: `session_id=eq.${sessionId}`
},
(payload) => {
console.log('[SessionSync] Participant change:', payload);
this.handleParticipantChange(payload);
}
)
.subscribe((status) => {
console.log('[SessionSync] Subscription status:', status);
});
}
/**
* Handle participant changes from Supabase
*/
private async handleParticipantChange(payload: any) {
console.log('[SessionSync] New/updated participant:', payload.new);
// Reload all participants and notify callback
if (this.sessionId && this.onParticipantChangeCallback) {
const participants = await this.getParticipants(this.sessionId);
this.onParticipantChangeCallback(participants);
}
}
/**
* Set callback for participant changes
*/
setOnParticipantChange(callback: (participants: any[]) => void) {
this.onParticipantChangeCallback = callback;
}
/**
* Get all current participants in the session
*/
async getParticipants(sessionId: string): Promise<any[]> {
const supabase = getSupabase();
const { data, error } = await supabase
.from('session_participants')
.select('*')
.eq('session_id', sessionId)
.is('left_at', null)
.order('joined_at', { ascending: true });
if (error) {
console.error('[SessionSync] Failed to get participants:', error);
return [];
}
return data || [];
}
/**
* Leave the session - deletes the participant record
*/
async leaveSession() {
if (!this.sessionId) return;
const supabase = getSupabase();
try {
const { data: { user } } = await supabase.auth.getUser();
if (!user) return;
// Delete the participant record
const { error } = await supabase
.from('session_participants')
.delete()
.eq('session_id', this.sessionId)
.eq('user_id', user.id);
if (error) {
console.error('[SessionSync] Error deleting participant record:', error);
} else {
console.log('[SessionSync] Successfully left session and removed from participants');
}
// Unsubscribe
if (this.channel) {
await this.channel.unsubscribe();
this.channel = undefined;
}
} catch (err) {
console.error('[SessionSync] Error leaving session:', err);
}
}
/**
* Cleanup all participants for a session (host ending session)
*/
async cleanupSession(sessionId: string) {
const supabase = getSupabase();
try {
const { error } = await supabase
.from('session_participants')
.delete()
.eq('session_id', sessionId);
if (error) {
console.error('[SessionSync] Error cleaning up session:', error);
} else {
console.log('[SessionSync] Successfully cleaned up all participants for session:', sessionId);
}
// Unsubscribe if this was our session
if (this.sessionId === sessionId && this.channel) {
await this.channel.unsubscribe();
this.channel = undefined;
}
} catch (err) {
console.error('[SessionSync] Error cleaning up session:', err);
}
}
}
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