266 lines
7.5 KiB
Python
266 lines
7.5 KiB
Python
import json
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import uuid
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from datetime import datetime
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from auth.authenticate import login_required
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from base.redis import redis
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from base.resolvers import mutation, query, subscription
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from services.inbox import MessageResult, MessagesStorage, ChatFollowing
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async def get_unread_counter(chat_id, user_slug):
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try:
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return int(await redis.execute("LLEN", f"chats/{chat_id}/unread/{user_slug}"))
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except Exception:
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return 0
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async def get_total_unread_counter(user_slug):
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chats = await redis.execute("GET", f"chats_by_user/{user_slug}")
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if not chats:
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return 0
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chats = json.loads(chats)
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unread = 0
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for chat_id in chats:
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n = await get_unread_counter(chat_id, user_slug)
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unread += n
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return unread
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async def add_user_to_chat(user_slug: str, chat_id: int, chat=None):
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chats = await redis.execute("GET", f"chats_by_user/{user_slug}")
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if chats:
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chats = list(json.loads(chats))
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else:
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chats = []
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if chat_id not in chats:
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chats.append(chat_id)
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await redis.execute("SET", f"chats_by_user/{user_slug}", json.dumps(chats))
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if user_slug not in chat["users"]:
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chat["users"].append(user_slug)
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await redis.execute("SET", f"chats/{chat_id}", json.dumps(chat))
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@mutation.field("inviteChat")
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async def invite_to_chat(_, info, invited, chat_id):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chat_id}")
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if user.slug in chat['users']:
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add_user_to_chat(invited, chat_id, chat)
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@mutation.field("createChat")
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@login_required
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async def create_chat(_, info, description="", title=""):
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user = info.context["request"].user
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chat_id = uuid.uuid4()
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chat = {
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"title": title,
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"description": description,
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"createdAt": str(datetime.now().timestamp()),
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"updatedAt": str(datetime.now().timestamp()),
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"createdBy": user.slug,
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"id": str(chat_id),
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"users": [user.slug],
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}
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await redis.execute("SET", f"chats/{chat_id}", json.dumps(chat))
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await redis.execute("SET", f"chats/{chat_id}/next_message_id", 0)
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await add_user_to_chat(user.slug, chat_id)
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return chat
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async def load_messages(chatId: int, size: int, page: int):
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message_ids = await redis.lrange(
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f"chats/{chatId}/message_ids", size * (page - 1), size * page - 1
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)
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messages = []
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if message_ids:
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message_keys = [
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f"chats/{chatId}/messages/{mid}" for mid in message_ids
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]
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messages = await redis.mget(*message_keys)
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messages = [json.loads(msg) for msg in messages]
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return messages
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@query.field("myChats")
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@login_required
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async def user_chats(_, info):
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user = info.context["request"].user
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chats = await redis.execute("GET", f"chats_by_user/{user.slug}")
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if not chats:
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chats = list()
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else:
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chats = list(json.loads(chats))
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for c in chats:
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c['messages'] = await load_messages(c['id'], 50, 1)
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c['unread'] = await get_unread_counter(c['id'], user.slug)
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return chats
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@query.field("enterChat")
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@login_required
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async def enter_chat(_, info, chatId):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chatId}")
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if not chat:
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return {"error": "chat not exist"}
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chat = json.loads(chat)
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await add_user_to_chat(user.slug, chatId, chat)
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chat['messages'] = await load_messages(chatId, 50, 1)
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return chat
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@mutation.field("createMessage")
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@login_required
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async def create_message(_, info, chatId, body, replyTo=None):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chatId}")
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if not chat:
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return {"error": "chat not exist"}
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message_id = await redis.execute("GET", f"chats/{chatId}/next_message_id")
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message_id = int(message_id)
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new_message = {
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"chatId": chatId,
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"id": message_id,
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"author": user.slug,
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"body": body,
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"replyTo": replyTo,
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"createdAt": datetime.now().isoformat(),
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}
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await redis.execute(
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"SET", f"chats/{chatId}/messages/{message_id}", json.dumps(new_message)
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)
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await redis.execute("LPUSH", f"chats/{chatId}/message_ids", str(message_id))
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await redis.execute("SET", f"chats/{chatId}/next_message_id", str(message_id + 1))
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chat = json.loads(chat)
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users = chat["users"]
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for user_slug in users:
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await redis.execute(
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"LPUSH", f"chats/{chatId}/unread/{user_slug}", str(message_id)
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)
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result = MessageResult("NEW", new_message)
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await MessagesStorage.put(result)
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return {"message": new_message}
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@query.field("loadChat")
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@login_required
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async def get_messages(_, info, chatId, size, page):
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chat = await redis.execute("GET", f"chats/{chatId}")
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if not chat:
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return {"error": "chat not exist"}
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messages = await load_messages(chatId, size, page)
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return messages
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@mutation.field("updateMessage")
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@login_required
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async def update_message(_, info, chatId, id, body):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chatId}")
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if not chat:
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return {"error": "chat not exist"}
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message = await redis.execute("GET", f"chats/{chatId}/messages/{id}")
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if not message:
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return {"error": "message not exist"}
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message = json.loads(message)
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if message["author"] != user.slug:
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return {"error": "access denied"}
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message["body"] = body
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message["updatedAt"] = datetime.now().isoformat()
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await redis.execute("SET", f"chats/{chatId}/messages/{id}", json.dumps(message))
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result = MessageResult("UPDATED", message)
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await MessagesStorage.put(result)
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return {"message": message}
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@mutation.field("deleteMessage")
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@login_required
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async def delete_message(_, info, chatId, id):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chatId}")
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if not chat:
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return {"error": "chat not exist"}
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message = await redis.execute("GET", f"chats/{chatId}/messages/{id}")
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if not message:
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return {"error": "message not exist"}
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message = json.loads(message)
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if message["author"] != user.slug:
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return {"error": "access denied"}
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await redis.execute("LREM", f"chats/{chatId}/message_ids", 0, str(id))
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await redis.execute("DEL", f"chats/{chatId}/messages/{id}")
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chat = json.loads(chat)
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users = chat["users"]
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for user_slug in users:
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await redis.execute("LREM", f"chats/{chatId}/unread/{user_slug}", 0, str(id))
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result = MessageResult("DELETED", message)
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await MessagesStorage.put(result)
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return {}
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@mutation.field("markAsRead")
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@login_required
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async def mark_as_read(_, info, chatId, ids):
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user = info.context["request"].user
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chat = await redis.execute("GET", f"chats/{chatId}")
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if not chat:
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return {"error": "chat not exist"}
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chat = json.loads(chat)
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users = set(chat["users"])
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if user.slug not in users:
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return {"error": "access denied"}
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for id in ids:
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await redis.execute("LREM", f"chats/{chatId}/unread/{user.slug}", 0, str(id))
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return {}
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@subscription.source("chatUpdated")
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@login_required
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async def message_generator(obj, info, chatId):
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try:
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following_chat = ChatFollowing(chatId)
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await MessagesStorage.register_chat(following_chat)
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while True:
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msg = await following_chat.queue.get()
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yield msg
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finally:
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await MessagesStorage.remove_chat(following_chat)
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@subscription.field("chatUpdated")
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def message_resolver(message, info, chatId):
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return message
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