|
| 1 | +""" |
| 2 | +Employment Console — Django Channels WebSocket Consumer |
| 3 | +Architecture §2.7 — Real-Time Event System |
| 4 | +
|
| 5 | +Handles real-time events for: |
| 6 | + - Interview rooms (video signaling, chat, presence) |
| 7 | + - Application status updates |
| 8 | + - Admin notifications (new submissions, decisions) |
| 9 | +
|
| 10 | +Room naming conventions: |
| 11 | + interview_<interview_uuid> — Interview room (all participants) |
| 12 | + application_<app_uuid> — Application feed (HR/admin) |
| 13 | + employment_admin — Admin broadcast channel |
| 14 | +""" |
| 15 | + |
| 16 | +import json |
| 17 | +from channels.generic.websocket import AsyncWebsocketConsumer |
| 18 | + |
| 19 | + |
| 20 | +class InterviewConsumer(AsyncWebsocketConsumer): |
| 21 | + """ |
| 22 | + Interview room WebSocket consumer. |
| 23 | + Powers: real-time chat, WebRTC signaling (offer/answer/ICE), |
| 24 | + coding test sync, presence tracking. |
| 25 | + """ |
| 26 | + |
| 27 | + async def connect(self): |
| 28 | + self.interview_id = self.scope['url_route']['kwargs']['interview_id'] |
| 29 | + self.room_name = f'interview_{self.interview_id}' |
| 30 | + self.user = self.scope.get('user') |
| 31 | + |
| 32 | + if not self.user or not self.user.is_authenticated: |
| 33 | + await self.close(code=4001) |
| 34 | + return |
| 35 | + |
| 36 | + await self.channel_layer.group_add(self.room_name, self.channel_name) |
| 37 | + await self.accept() |
| 38 | + |
| 39 | + # Broadcast presence |
| 40 | + await self.channel_layer.group_send(self.room_name, { |
| 41 | + 'type': 'presence', |
| 42 | + 'event': 'joined', |
| 43 | + 'user_id': self.user.id, |
| 44 | + 'username': self.user.get_full_name() or self.user.username, |
| 45 | + }) |
| 46 | + |
| 47 | + async def disconnect(self, close_code): |
| 48 | + if hasattr(self, 'room_name'): |
| 49 | + await self.channel_layer.group_send(self.room_name, { |
| 50 | + 'type': 'presence', |
| 51 | + 'event': 'left', |
| 52 | + 'user_id': self.user.id if self.user else None, |
| 53 | + 'username': getattr(self.user, 'username', 'unknown'), |
| 54 | + }) |
| 55 | + await self.channel_layer.group_discard(self.room_name, self.channel_name) |
| 56 | + |
| 57 | + async def receive(self, text_data): |
| 58 | + try: |
| 59 | + data = json.loads(text_data) |
| 60 | + except (json.JSONDecodeError, TypeError): |
| 61 | + return |
| 62 | + |
| 63 | + msg_type = data.get('type') |
| 64 | + |
| 65 | + # WebRTC signaling passthrough |
| 66 | + if msg_type in ('offer', 'answer', 'ice_candidate'): |
| 67 | + await self.channel_layer.group_send(self.room_name, { |
| 68 | + 'type': 'signal', |
| 69 | + 'signal_type': msg_type, |
| 70 | + 'payload': data.get('payload'), |
| 71 | + 'from_user': self.user.id, |
| 72 | + 'target_user': data.get('target_user'), |
| 73 | + }) |
| 74 | + |
| 75 | + # Chat message |
| 76 | + elif msg_type == 'chat': |
| 77 | + await self.channel_layer.group_send(self.room_name, { |
| 78 | + 'type': 'chat_message', |
| 79 | + 'message': data.get('message', ''), |
| 80 | + 'from_user': self.user.id, |
| 81 | + 'username': self.user.get_full_name() or self.user.username, |
| 82 | + }) |
| 83 | + |
| 84 | + # Coding test code sync |
| 85 | + elif msg_type == 'code_sync': |
| 86 | + await self.channel_layer.group_send(self.room_name, { |
| 87 | + 'type': 'code_update', |
| 88 | + 'code': data.get('code', ''), |
| 89 | + 'language': data.get('language', 'python'), |
| 90 | + 'from_user': self.user.id, |
| 91 | + }) |
| 92 | + |
| 93 | + # Coding test result |
| 94 | + elif msg_type == 'code_run': |
| 95 | + await self.channel_layer.group_send(self.room_name, { |
| 96 | + 'type': 'code_result', |
| 97 | + 'output': data.get('output', ''), |
| 98 | + 'status': data.get('status', 'unknown'), |
| 99 | + 'from_user': self.user.id, |
| 100 | + }) |
| 101 | + |
| 102 | + # ── Group message handlers ──────────────────────────────── |
| 103 | + |
| 104 | + async def signal(self, event): |
| 105 | + await self.send(text_data=json.dumps({ |
| 106 | + 'type': 'signal', |
| 107 | + 'signal_type': event['signal_type'], |
| 108 | + 'payload': event['payload'], |
| 109 | + 'from_user': event['from_user'], |
| 110 | + 'target_user': event.get('target_user'), |
| 111 | + })) |
| 112 | + |
| 113 | + async def chat_message(self, event): |
| 114 | + await self.send(text_data=json.dumps({ |
| 115 | + 'type': 'chat', |
| 116 | + 'message': event['message'], |
| 117 | + 'from_user': event['from_user'], |
| 118 | + 'username': event['username'], |
| 119 | + })) |
| 120 | + |
| 121 | + async def code_update(self, event): |
| 122 | + await self.send(text_data=json.dumps({ |
| 123 | + 'type': 'code_sync', |
| 124 | + 'code': event['code'], |
| 125 | + 'language': event['language'], |
| 126 | + 'from_user': event['from_user'], |
| 127 | + })) |
| 128 | + |
| 129 | + async def code_result(self, event): |
| 130 | + await self.send(text_data=json.dumps({ |
| 131 | + 'type': 'code_run', |
| 132 | + 'output': event['output'], |
| 133 | + 'status': event['status'], |
| 134 | + 'from_user': event['from_user'], |
| 135 | + })) |
| 136 | + |
| 137 | + async def presence(self, event): |
| 138 | + await self.send(text_data=json.dumps({ |
| 139 | + 'type': 'presence', |
| 140 | + 'event': event['event'], |
| 141 | + 'user_id': event.get('user_id'), |
| 142 | + 'username': event.get('username'), |
| 143 | + })) |
| 144 | + |
| 145 | + |
| 146 | +class EmploymentAdminConsumer(AsyncWebsocketConsumer): |
| 147 | + """ |
| 148 | + Admin/HR real-time feed. |
| 149 | + Broadcasts: new applications, status changes, interview completions, hire decisions. |
| 150 | + """ |
| 151 | + |
| 152 | + ADMIN_GROUP = 'employment_admin' |
| 153 | + |
| 154 | + async def connect(self): |
| 155 | + self.user = self.scope.get('user') |
| 156 | + if not self.user or not self.user.is_authenticated or not self.user.is_staff: |
| 157 | + await self.close(code=4003) |
| 158 | + return |
| 159 | + |
| 160 | + await self.channel_layer.group_add(self.ADMIN_GROUP, self.channel_name) |
| 161 | + await self.accept() |
| 162 | + |
| 163 | + async def disconnect(self, close_code): |
| 164 | + await self.channel_layer.group_discard(self.ADMIN_GROUP, self.channel_name) |
| 165 | + |
| 166 | + async def receive(self, text_data): |
| 167 | + pass # Admin feed is broadcast-only from server |
| 168 | + |
| 169 | + async def employment_event(self, event): |
| 170 | + await self.send(text_data=json.dumps({ |
| 171 | + 'type': event.get('event_name'), |
| 172 | + 'payload': event.get('payload', {}), |
| 173 | + })) |
0 commit comments