fix types (big)

varied fixes across many, many files.

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-image: python:3.7-alpine
+image: python:3.8-alpine
 
 variables:
   PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"

Pipfile

@@ -26,7 +26,7 @@ flake8 = "*"
 pyflakes = "*"
 
 [requires]
-python_version = "3.7"
+python_version = "3.8"
 
 [pipenv]
 allow_prereleases = true

Pipfile.lock

@@ -1,11 +1,11 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "bdd693f88f93f57b4a6eca42e0c8f053e500ddc40e344d888af86143c1904751"
+            "sha256": "ee24bd04c2d9b93bce1e8595379c652a31540b9da54f6ba7ef01182164be68e3"
         },
         "pipfile-spec": 6,
         "requires": {
-            "python_version": "3.7"
+            "python_version": "3.8"
         },
         "sources": [
             {
@@ -238,10 +238,10 @@
         },
         "jinja2": {
             "hashes": [
-                "sha256:93187ffbc7808079673ef52771baa950426fd664d3aad1d0fa3e95644360e250",
+                "sha256:c10142f819c2d22bdcd17548c46fa9b77cf4fda45097854c689666bf425e7484",
-                "sha256:b0eaf100007721b5c16c1fc1eecb87409464edc10469ddc9a22a27a99123be49"
+                "sha256:c922560ac46888d47384de1dbdc3daaa2ea993af4b26a436dec31fa2c19ec668"
             ],
-            "version": "==2.11.1"
+            "version": "==3.0.0a1"
         },
         "logbook": {
             "hashes": [
@@ -554,14 +554,6 @@
             "index": "pypi",
             "version": "==3.7.9"
         },
-        "importlib-metadata": {
-            "hashes": [
-                "sha256:06f5b3a99029c7134207dd882428a66992a9de2bef7c2b699b5641f9886c3302",
-                "sha256:b97607a1a18a5100839aec1dc26a1ea17ee0d93b20b0f008d80a5a050afb200b"
-            ],
-            "markers": "python_version < '3.8'",
-            "version": "==1.5.0"
-        },
         "mccabe": {
             "hashes": [
                 "sha256:ab8a6258860da4b6677da4bd2fe5dc2c659cff31b3ee4f7f5d64e79735b80d42",
@@ -749,13 +741,6 @@
                 "sha256:f28b3e8a6483e5d49e7f8949ac1a78314e740333ae305b4ba5defd3e74fb37a8"
             ],
             "version": "==0.1.8"
-        },
-        "zipp": {
-            "hashes": [
-                "sha256:ccc94ed0909b58ffe34430ea5451f07bc0c76467d7081619a454bf5c98b89e28",
-                "sha256:feae2f18633c32fc71f2de629bfb3bd3c9325cd4419642b1f1da42ee488d9b98"
-            ],
-            "version": "==2.1.0"
         }
     }
 }

README.md

@@ -66,7 +66,7 @@ or third party libraries (such as [Eris](https://github.com/abalabahaha/eris)).
 
 Requirements:
 
-- **Python 3.7+**
+- **Python 3.8+**
 - PostgreSQL (tested using 9.6+), SQL knowledge is recommended.
 - gifsicle for GIF emoji and avatar handling
 - [pipenv]

litecord/blueprints/admin_api/instance_invites.py

@@ -19,6 +19,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import string
 from random import choice
+from typing import Optional
 
 from quart import Blueprint, jsonify, current_app as app, request
 
@@ -36,7 +37,7 @@ async def _gen_inv() -> str:
     return "".join(choice(ALPHABET) for _ in range(6))
 
 
-async def gen_inv(ctx) -> str:
+async def gen_inv(ctx) -> Optional[str]:
     """Generate an invite."""
     for _ in range(10):
         possible_inv = await _gen_inv()

litecord/blueprints/channel/messages.py

@@ -18,6 +18,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
 from pathlib import Path
+from typing import Optional
 
 from quart import Blueprint, request, current_app as app, jsonify
 from logbook import Logger
@@ -146,7 +147,7 @@ async def _dm_pre_dispatch(channel_id, peer_id):
 
 
 async def create_message(
-    channel_id: int, actual_guild_id: int, author_id: int, data: dict
+    channel_id: int, actual_guild_id: Optional[int], author_id: int, data: dict
 ) -> int:
     message_id = get_snowflake()
 
@@ -159,7 +160,7 @@ async def create_message(
                 content, tts, mention_everyone, nonce, message_type,
                 embeds)
             VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
-        """,
+            """,
             message_id,
             channel_id,
             actual_guild_id,
@@ -186,7 +187,7 @@ async def _create_message(channel_id):
     user_id = await token_check()
     ctype, guild_id = await channel_check(user_id, channel_id)
 
-    actual_guild_id = None
+    actual_guild_id: Optional[int] = None
 
     if ctype in GUILD_CHANS:
         await channel_perm_check(user_id, channel_id, "send_messages")

litecord/blueprints/channel/pins.py

@@ -114,7 +114,7 @@ async def add_pin(channel_id, message_id):
     )
 
     await send_sys_message(
-        app, channel_id, MessageType.CHANNEL_PINNED_MESSAGE, message_id, user_id
+        channel_id, MessageType.CHANNEL_PINNED_MESSAGE, message_id, user_id
     )
 
     return "", 204

litecord/blueprints/channel/reactions.py

@@ -18,7 +18,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
 from enum import IntEnum
-from typing import List, Union, Tuple
+from typing import List, Union, Tuple, TypedDict, Optional
 
 from quart import Blueprint, request, current_app as app, jsonify
 from logbook import Logger
@@ -60,7 +60,12 @@ def emoji_info_from_str(emoji: str) -> tuple:
     return emoji_type, emoji_id, emoji_name
 
 
-def partial_emoji(emoji_type, emoji_id, emoji_name) -> dict:
+class PartialEmoji(TypedDict):
+    id: Optional[int]
+    name: str
+
+
+def partial_emoji(emoji_type, emoji_id, emoji_name) -> PartialEmoji:
     print(emoji_type, emoji_id, emoji_name)
     return {
         "id": None if emoji_type == EmojiType.UNICODE else emoji_id,

litecord/blueprints/channels.py

@@ -386,14 +386,14 @@ async def put_channel_overwrite(channel_id: int, overwrite_id: int):
     return "", 204
 
 
-async def _update_channel_common(channel_id, guild_id: int, j: dict):
+async def _update_channel_common(channel_id: int, guild_id: int, j: dict):
     if "name" in j:
         await app.db.execute(
             """
-        UPDATE guild_channels
+            UPDATE guild_channels
-        SET name = $1
+            SET name = $1
-        WHERE id = $2
+            WHERE id = $2
-        """,
+            """,
             j["name"],
             channel_id,
         )
@@ -401,7 +401,9 @@ async def _update_channel_common(channel_id, guild_id: int, j: dict):
     if "position" in j:
         channel_data = await app.storage.get_channel_data(guild_id)
 
-        chans = [None] * len(channel_data)
+        # get an ordered list of the chans array by position
+        # TODO bad impl. can break easily. maybe dict?
+        chans: List[Optional[int]] = [None] * len(channel_data)
         for chandata in channel_data:
             chans.insert(chandata["position"], int(chandata["id"]))
 
@@ -422,7 +424,7 @@ async def _update_channel_common(channel_id, guild_id: int, j: dict):
         left_shift = new_pos > current_pos
 
         # find all channels that we'll have to shift
-        shift_block = (
+        shift_block: List[Optional[int]] = (
             chans[current_pos:new_pos] if left_shift else chans[new_pos:current_pos]
         )
 
@@ -509,9 +511,7 @@ async def _update_group_dm(channel_id: int, j: dict, author_id: int):
             channel_id,
         )
 
-        await send_sys_message(
+        await send_sys_message(channel_id, MessageType.CHANNEL_NAME_CHANGE, author_id)
-            app, channel_id, MessageType.CHANNEL_NAME_CHANGE, author_id
-        )
 
     if "icon" in j:
         new_icon = await app.icons.update(
@@ -528,13 +528,11 @@ async def _update_group_dm(channel_id: int, j: dict, author_id: int):
             channel_id,
         )
 
-        await send_sys_message(
+        await send_sys_message(channel_id, MessageType.CHANNEL_ICON_CHANGE, author_id)
-            app, channel_id, MessageType.CHANNEL_ICON_CHANGE, author_id
-        )
 
 
 @bp.route("/<int:channel_id>", methods=["PUT", "PATCH"])
-async def update_channel(channel_id):
+async def update_channel(channel_id: int):
     """Update a channel's information"""
     user_id = await token_check()
     ctype, guild_id = await channel_check(user_id, channel_id)

litecord/blueprints/checks.py

@@ -17,7 +17,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
 
-from typing import Union, List
+from typing import Union, List, Optional
 
 from quart import current_app as app
 
@@ -66,7 +66,7 @@ async def guild_owner_check(user_id: int, guild_id: int):
 
 
 async def channel_check(
-    user_id, channel_id, *, only: Union[ChannelType, List[ChannelType]] = None
+    user_id, channel_id, *, only: Optional[Union[ChannelType, List[ChannelType]]] = None
 ):
     """Check if the current user is authorized
     to read the channel's information."""
@@ -77,10 +77,10 @@ async def channel_check(
 
     ctype = ChannelType(chan_type)
 
-    if only and not isinstance(only, list):
+    if (only is not None) and not isinstance(only, list):
         only = [only]
 
-    if only and ctype not in only:
+    if (only is not None) and ctype not in only:
         raise ChannelNotFound("invalid channel type")
 
     if ctype in GUILD_CHANS:

litecord/blueprints/dm_channels.py

@@ -113,9 +113,7 @@ async def gdm_add_recipient(channel_id: int, peer_id: int, *, user_id=None):
     await app.dispatcher.sub("channel", peer_id)
 
     if user_id:
-        await send_sys_message(
+        await send_sys_message(channel_id, MessageType.RECIPIENT_ADD, user_id, peer_id)
-            app, channel_id, MessageType.RECIPIENT_ADD, user_id, peer_id
-        )
 
 
 async def gdm_remove_recipient(channel_id: int, peer_id: int, *, user_id=None):
@@ -145,9 +143,7 @@ async def gdm_remove_recipient(channel_id: int, peer_id: int, *, user_id=None):
 
     author_id = peer_id if user_id is None else user_id
 
-    await send_sys_message(
+    await send_sys_message(channel_id, MessageType.RECIPIENT_REMOVE, author_id, peer_id)
-        app, channel_id, MessageType.RECIPIENT_REMOVE, author_id, peer_id
-    )
 
 
 async def gdm_destroy(channel_id):

litecord/blueprints/guild/channels.py

@@ -130,14 +130,11 @@ async def modify_channel_pos(guild_id):
     # the same schema and all.
     raw_j = await request.get_json()
     j = validate({"roles": raw_j}, ROLE_UPDATE_POSITION)
-    j = j["roles"]
+    roles = j["roles"]
 
     channels = await app.storage.get_channel_data(guild_id)
 
     channel_positions = {chan["position"]: int(chan["id"]) for chan in channels}
-
+    swap_pairs = gen_pairs(roles, channel_positions)
-    swap_pairs = gen_pairs(j, channel_positions)
-
     await _do_channel_swaps(guild_id, swap_pairs)
-
     return "", 204

litecord/blueprints/guild/roles.py

@@ -17,7 +17,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
 
-from typing import List, Dict, Tuple
+from typing import List, Dict, Tuple, Optional
 
 from quart import Blueprint, request, current_app as app, jsonify
 from logbook import Logger
@@ -122,7 +122,7 @@ PairList = List[Tuple[Tuple[int, int], Tuple[int, int]]]
 def gen_pairs(
     list_of_changes: List[Dict[str, int]],
     current_state: Dict[int, int],
-    blacklist: List[int] = None,
+    blacklist: Optional[List[int]] = None,
 ) -> PairList:
     """Generate a list of pairs that, when applied to the database,
     will generate the desired state given in list_of_changes.
@@ -162,7 +162,7 @@ def gen_pairs(
         List of swaps to do to achieve the preferred
         state given by ``list_of_changes``.
     """
-    pairs = []
+    pairs: PairList = []
     blacklist = blacklist or []
 
     preferred_state = {
@@ -222,9 +222,9 @@ async def update_guild_role_positions(guild_id):
     j = validate({"roles": raw_j}, ROLE_UPDATE_POSITION)
 
     # extract the list out
-    j = j["roles"]
+    roles = j["roles"]
 
-    log.debug("role stuff: {!r}", j)
+    log.debug("role stuff: {!r}", roles)
 
     all_roles = await app.storage.get_role_data(guild_id)
 
@@ -238,7 +238,7 @@ async def update_guild_role_positions(guild_id):
     # NOTE: ^ this is related to the positioning of the roles.
 
     pairs = gen_pairs(
-        j,
+        roles,
         roles_pos,
         # always ignore people trying to change
         # the @everyone's role position

litecord/blueprints/guilds.py

@@ -96,7 +96,7 @@ def sanitize_icon(icon: Optional[str]) -> Optional[str]:
     return f"data:image/jpeg;base64,{icon}" if icon else None
 
 
-async def _general_guild_icon(scope: str, guild_id: int, icon: str, **kwargs):
+async def _general_guild_icon(scope: str, guild_id: int, icon: Optional[str], **kwargs):
     encoded = sanitize_icon(icon)
 
     icon_kwargs = {"always_icon": True}

litecord/blueprints/webhooks.py

@@ -222,14 +222,14 @@ async def get_guild_webhook(guild_id):
 async def get_single_webhook(webhook_id):
     """Get a single webhook's information."""
     await _webhook_check_fw(webhook_id)
-    return await jsonify(await get_webhook(webhook_id))
+    return jsonify(await get_webhook(webhook_id))
 
 
 @bp.route("/webhooks/<int:webhook_id>/<webhook_token>", methods=["GET"])
 async def get_tokened_webhook(webhook_id, webhook_token):
     """Get a webhook using its token."""
     await webhook_token_check(webhook_id, webhook_token)
-    return await jsonify(await get_webhook(webhook_id, secure=False))
+    return jsonify(await get_webhook(webhook_id, secure=False))
 
 
 async def _update_webhook(webhook_id: int, j: dict):
@@ -289,6 +289,7 @@ async def modify_webhook(webhook_id: int):
     await _update_webhook(webhook_id, j)
 
     webhook = await get_webhook(webhook_id)
+    assert webhook is not None
 
     # we don't need to cast channel_id to int since that isn't
     # used in the dispatcher call
@@ -313,7 +314,9 @@ async def modify_webhook_tokened(webhook_id, webhook_token):
 async def delete_webhook(webhook_id: int):
     """Delete a webhook."""
     webhook = await get_webhook(webhook_id)
+    assert webhook is not None
 
+    # TODO use returning?
     res = await app.db.execute(
         """
     DELETE FROM webhooks
@@ -423,7 +426,10 @@ async def _create_avatar(webhook_id: int, avatar_url: EmbedURL) -> str:
     # we still fetch the URL to check its validity, mimetypes, etc
     # but in the end, we will store it under the webhook_avatars table,
     # not IconManager.
-    resp, raw = await fetch_mediaproxy_img(avatar_url)
+    res = await fetch_mediaproxy_img(avatar_url)
+    if res is None:
+        raise BadRequest("Failed to fetch URL.")
+    resp, raw = res
     # raw_b64 = base64.b64encode(raw).decode()
 
     mime = resp.headers["content-type"]
@@ -469,6 +475,7 @@ async def execute_webhook(webhook_id: int, webhook_token):
     given_embeds = j.get("embeds", [])
 
     webhook = await get_webhook(webhook_id)
+    assert webhook is not None
 
     # webhooks have TWO avatars. one is from settings, the other is from
     # the json's icon_url. one can be handled gracefully by IconManager,

litecord/common/channels.py

@@ -16,6 +16,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
+from typing import Optional
 from quart import current_app as app
 
 
@@ -24,12 +25,15 @@ from litecord.enums import RelationshipType
 
 
 async def channel_ack(
-    user_id: int, guild_id: int, channel_id: int, message_id: int = None
+    user_id: int, guild_id: int, channel_id: int, message_id: Optional[int] = None
 ):
     """ACK a channel."""
 
-    if not message_id:
+    message_id = message_id or await app.storage.chan_last_message(channel_id)
-        message_id = await app.storage.chan_last_message(channel_id)
+
+    # never ack without a message, as that breaks read state.
+    if message_id is None:
+        return
 
     await app.db.execute(
         """

litecord/common/users.py

@@ -18,7 +18,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
 from random import randint
-from typing import Tuple, Optional
+from typing import Tuple, Optional, List
 
 from quart import current_app as app
 from asyncpg import UniqueViolationError
@@ -33,13 +33,13 @@ from ..utils import rand_hex
 log = Logger(__name__)
 
 
-async def mass_user_update(user_id):
+async def mass_user_update(user_id: int):
     """Dispatch USER_UPDATE in a mass way."""
     # by using dispatch_with_filter
     # we're guaranteeing all shards will get
     # a USER_UPDATE once and not any others.
 
-    session_ids = []
+    session_ids: List[str] = []
 
     public_user = await app.storage.get_user(user_id)
     private_user = await app.storage.get_user(user_id, secure=True)

litecord/embed/messages.py

@@ -21,7 +21,7 @@ import re
 import asyncio
 import urllib.parse
 from pathlib import Path
-from typing import List
+from typing import List, Optional
 
 from quart import current_app as app
 from logbook import Logger
@@ -35,16 +35,16 @@ log = Logger(__name__)
 MEDIA_EXTENSIONS = ("png", "jpg", "jpeg", "gif", "webm")
 
 
-async def fetch_mediaproxy_img_meta(url) -> dict:
+async def fetch_mediaproxy_img_meta(url) -> Optional[dict]:
     """Insert media metadata as an embed."""
     img_proxy_url = proxify(url)
     meta = await fetch_metadata(url)
 
     if meta is None:
-        return
+        return None
 
     if not meta["image"]:
-        return
+        return None
 
     return {
         "type": "image",
@@ -135,13 +135,15 @@ async def process_url_embed(payload: dict, *, delay=0):
     # if it isn't, we forward an /embed/ scope call to mediaproxy
     # to generate an embed for us out of the url.
 
-    new_embeds = []
+    new_embeds: List[dict] = []
 
-    for url in urls:
+    for upstream_url in urls:
-        url: List[dict] = EmbedURL(url)
+        url = EmbedURL(upstream_url)
 
         if is_media_url(url):
-            embeds = [await fetch_mediaproxy_img_meta(url)]
+            embed = await fetch_mediaproxy_img_meta(url)
+            if embed is not None:
+                embeds = [embed]
         else:
             embeds = await fetch_mediaproxy_embed(url)
 

litecord/images.py

@@ -98,6 +98,9 @@ class Icon:
 
         return get_ext(self.mime)
 
+    def __bool__(self):
+        return self.key and self.icon_hash and self.mime
+
 
 class ImageError(Exception):
     """Image error class."""
@@ -197,6 +200,9 @@ def _gen_update_sql(scope: str) -> str:
 
 def _invalid(kwargs: dict) -> Optional[Icon]:
     """Send an invalid value."""
+    # TODO: remove optinality off this (really badly designed):
+    #  - also remove kwargs off this function
+    #  - also make an Icon.empty() constructor, and remove need for this entirely
     if not kwargs.get("always_icon", False):
         return None
 
@@ -519,6 +525,7 @@ class IconManager:
         key = str(key)
 
         old_icon = await self.generic_get(scope, key, old_icon_hash)
-        await self.delete(old_icon)
+        if old_icon:
+            await self.delete(old_icon)
 
         return await self.put(scope, key, new_icon_data, **kwargs)

litecord/permissions.py

@@ -88,6 +88,7 @@ class Permissions(ctypes.Union):
 
 
 ALL_PERMISSIONS = Permissions(0b01111111111101111111110111111111)
+EMPTY_PERMISSIONS = Permissions(0)
 
 
 async def get_role_perms(guild_id, role_id, storage=None) -> Permissions:

litecord/pubsub/channel.py

@@ -89,7 +89,7 @@ class ChannelDispatcher(DispatcherWithFlags):
             ):
                 continue
 
-            cur_sess = []
+            cur_sess: List[str] = []
 
             if (
                 event in ("CHANNEL_CREATE", "CHANNEL_UPDATE")

litecord/pubsub/friend.py

@@ -17,6 +17,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
 
+from typing import List
 from logbook import Logger
 
 from .dispatcher import DispatcherWithState
@@ -38,7 +39,7 @@ class FriendDispatcher(DispatcherWithState):
     async def dispatch_filter(self, user_id: int, func, event, data):
         """Dispatch an event to all of a users' friends."""
         peer_ids = self.state[user_id]
-        sessions = []
+        sessions: List[str] = []
 
         for peer_id in peer_ids:
             # dispatch to the user instead of the "shards tied to a guild"

litecord/pubsub/lazy_guild.py

@@ -39,6 +39,7 @@ from litecord.permissions import (
     overwrite_find_mix,
     get_permissions,
     role_permissions,
+    EMPTY_PERMISSIONS,
 )
 from litecord.utils import index_by_func
 from litecord.utils import mmh3
@@ -264,8 +265,8 @@ class GuildMemberList:
         self.list = MemberList()
 
         #: store the states that are subscribed to the list.
-        #  type is {session_id: set[list]}
+        #  type is {session_id: set[tuple]}
-        self.state: Dict[str, Set[List[int, int]]] = defaultdict(set)
+        self.state: Dict[str, Set[Tuple[int, int]]] = defaultdict(set)
 
         self._list_lock = asyncio.Lock()
 
@@ -414,8 +415,8 @@ class GuildMemberList:
         # inject default groups 'online' and 'offline'
         # their position is always going to be the last ones.
         self.list.groups = role_groups + [
-            GroupInfo("online", "online", MAX_ROLES + 1, 0),
+            GroupInfo("online", "online", MAX_ROLES + 1, EMPTY_PERMISSIONS),
-            GroupInfo("offline", "offline", MAX_ROLES + 2, 0),
+            GroupInfo("offline", "offline", MAX_ROLES + 2, EMPTY_PERMISSIONS),
         ]
 
     async def _get_group_for_member(
@@ -808,6 +809,8 @@ class GuildMemberList:
         ops = []
 
         old_user_index = self._get_item_index(user_id)
+        assert old_user_index is not None
+
         old_group_index = self._get_group_item_index(old_group)
 
         ops.append(Operation("DELETE", {"index": old_user_index}))
@@ -819,6 +822,7 @@ class GuildMemberList:
         await self._sort_groups()
 
         new_user_index = self._get_item_index(user_id)
+        assert new_user_index is not None
 
         ops.append(
             Operation(
@@ -931,6 +935,7 @@ class GuildMemberList:
             # if unknown state, remove from the subscriber list
             if state is None:
                 self.state.pop(session_id)
+                continue
 
             # if we aren't talking about the state the user
             # being removed is subscribed to, ignore
@@ -1365,8 +1370,8 @@ class GuildMemberList:
             len(self.state),
         )
 
-        self.guild_id = None
+        self.guild_id = 0
-        self.channel_id = None
+        self.channel_id = 0
         self.main = None
         self._set_empty_list()
         self.state = {}
@@ -1392,7 +1397,7 @@ class LazyGuildDispatcher(Dispatcher):
         #: store which guilds have their
         #  respective GMLs
         # {guild_id: [chan_id, ...], ...}
-        self.guild_map = defaultdict(list)
+        self.guild_map: Dict[int, List[int]] = defaultdict(list)
 
     async def get_gml(self, channel_id: int):
         """Get a guild list for a channel ID,
@@ -1414,7 +1419,18 @@ class LazyGuildDispatcher(Dispatcher):
 
     def get_gml_guild(self, guild_id: int) -> List[GuildMemberList]:
         """Get all member lists for a given guild."""
-        return list(map(self.state.get, self.guild_map[guild_id]))
+        res: List[GuildMemberList] = []
+
+        channel_ids: List[int] = self.guild_map[guild_id]
+        for channel_id in channel_ids:
+            guild_list: Optional[GuildMemberList] = self.state.get(channel_id)
+            if guild_list is None:
+                self.guild_map[guild_id].remove(channel_id)
+                continue
+
+            res.append(guild_list)
+
+        return res
 
     async def unsub(self, chan_id, session_id):
         """Unsubscribe a session from the list."""

litecord/storage.py

@@ -17,13 +17,18 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
 
-from typing import List, Dict, Any, Optional
+from typing import List, Dict, Any, Optional, Union, TypedDict
 
 from logbook import Logger
 
 from litecord.enums import ChannelType
 from litecord.schemas import USER_MENTION, ROLE_MENTION
-from litecord.blueprints.channel.reactions import EmojiType, emoji_sql, partial_emoji
+from litecord.blueprints.channel.reactions import (
+    EmojiType,
+    emoji_sql,
+    partial_emoji,
+    PartialEmoji,
+)
 
 from litecord.blueprints.user.billing import PLAN_ID_TO_TYPE
 
@@ -64,6 +69,12 @@ def _filter_recipients(recipients: List[Dict[str, Any]], user_id: str):
     return list(filter(lambda recipient: recipient["id"] != user_id, recipients))
 
 
+class EmojiStats(TypedDict):
+    count: int
+    me: bool
+    emoji: PartialEmoji
+
+
 class Storage:
     """Class for common SQL statements."""
 
@@ -373,7 +384,7 @@ class Storage:
         members = await self.get_member_multi(guild_id, mids)
         return members
 
-    async def chan_last_message(self, channel_id: int):
+    async def chan_last_message(self, channel_id: int) -> Optional[int]:
         """Get the last message ID in a channel."""
         return await self.db.fetchval(
             """
@@ -491,7 +502,7 @@ class Storage:
         return [r["member_id"] for r in user_ids]
 
     async def _gdm_recipients(
-        self, channel_id: int, reference_id: int = None
+        self, channel_id: int, reference_id: Optional[int] = None
     ) -> List[Dict]:
         """Get the list of users that are recipients of the
         given Group DM."""
@@ -576,11 +587,12 @@ class Storage:
 
             drow = dict(gdm_row)
             drow["type"] = chan_type
-            drow["recipients"] = await self._gdm_recipients(
-                channel_id, kwargs.get("user_id")
-            )
-            drow["last_message_id"] = await self.chan_last_message_str(channel_id)
 
+            user_id: Optional[int] = kwargs.get("user_id")
+            assert user_id is not None
+            drow["recipients"] = await self._gdm_recipients(channel_id, user_id)
+
+            drow["last_message_id"] = await self.chan_last_message_str(channel_id)
             return drow
 
         return None
@@ -634,7 +646,7 @@ class Storage:
         return channels
 
     async def get_role(
-        self, role_id: int, guild_id: int = None
+        self, role_id: int, guild_id: Optional[int] = None
     ) -> Optional[Dict[str, Any]]:
         """get a single role's information."""
 
@@ -732,6 +744,8 @@ class Storage:
 
         mids = [int(m["user"]["id"]) for m in members]
 
+        assert self.presence is not None
+
         return {
             **res,
             **{
@@ -822,10 +836,10 @@ class Storage:
         )
 
         # ordered list of emoji
-        emoji = []
+        emoji: List[Union[int, str]] = []
 
         # the current state of emoji info
-        react_stats = {}
+        react_stats: Dict[Union[str, int], EmojiStats] = {}
 
         # to generate the list, we pass through all
         # all reactions and insert them all.
@@ -1007,6 +1021,7 @@ class Storage:
         # calculate user mentions and role mentions by regex
         async def _get_member(user_id):
             user = await self.get_user(user_id)
+            assert user is not None
             member = None
 
             if guild_id:
@@ -1143,6 +1158,7 @@ class Storage:
             return {}
 
         mids = await self.get_member_ids(guild_id)
+        assert self.presence is not None
         pres = await self.presence.guild_presences(mids, guild_id)
         online_count = sum(1 for p in pres if p["status"] == "online")
 
@@ -1172,7 +1188,7 @@ class Storage:
 
         return dinv
 
-    async def get_dm(self, dm_id: int, user_id: int = None) -> Optional[Dict]:
+    async def get_dm(self, dm_id: int, user_id: Optional[int] = None) -> Optional[Dict]:
         """Get a DM channel."""
         dm_chan = await self.get_channel(dm_id)
 

litecord/system_messages.py

@@ -18,6 +18,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 
 from logbook import Logger
+from quart import current_app as app
 
 from winter import get_snowflake
 from litecord.enums import MessageType
@@ -25,7 +26,7 @@ from litecord.enums import MessageType
 log = Logger(__name__)
 
 
-async def _handle_pin_msg(app, channel_id, _pinned_id, author_id):
+async def _handle_pin_msg(channel_id, _pinned_id, author_id):
     """Handle a message pin."""
     new_id = get_snowflake()
 
@@ -48,7 +49,7 @@ async def _handle_pin_msg(app, channel_id, _pinned_id, author_id):
 
 
 # TODO: decrease repetition between add and remove handlers
-async def _handle_recp_add(app, channel_id, author_id, peer_id):
+async def _handle_recp_add(channel_id, author_id, peer_id):
     new_id = get_snowflake()
 
     await app.db.execute(
@@ -69,7 +70,7 @@ async def _handle_recp_add(app, channel_id, author_id, peer_id):
     return new_id
 
 
-async def _handle_recp_rmv(app, channel_id, author_id, peer_id):
+async def _handle_recp_rmv(channel_id, author_id, peer_id):
     new_id = get_snowflake()
 
     await app.db.execute(
@@ -90,7 +91,7 @@ async def _handle_recp_rmv(app, channel_id, author_id, peer_id):
     return new_id
 
 
-async def _handle_gdm_name_edit(app, channel_id, author_id):
+async def _handle_gdm_name_edit(channel_id, author_id):
     new_id = get_snowflake()
 
     gdm_name = await app.db.fetchval(
@@ -123,7 +124,7 @@ async def _handle_gdm_name_edit(app, channel_id, author_id):
     return new_id
 
 
-async def _handle_gdm_icon_edit(app, channel_id, author_id):
+async def _handle_gdm_icon_edit(channel_id, author_id):
     new_id = get_snowflake()
 
     await app.db.execute(
@@ -145,7 +146,7 @@ async def _handle_gdm_icon_edit(app, channel_id, author_id):
 
 
 async def send_sys_message(
-    app, channel_id: int, m_type: MessageType, *args, **kwargs
+    channel_id: int, m_type: MessageType, *args, **kwargs
 ) -> int:
     """Send a system message.
 
@@ -179,7 +180,7 @@ async def send_sys_message(
     except KeyError:
         raise ValueError("Invalid system message type")
 
-    message_id = await handler(app, channel_id, *args, **kwargs)
+    message_id = await handler(channel_id, *args, **kwargs)
 
     message = await app.storage.get_message(message_id)
 

mypy.ini

@@ -0,0 +1,11 @@
+[mypy]
+check_untyped_defs = True
+no_implicit_optional = True
+[mypy-logbook]
+ignore_missing_imports = True
+[mypy-quart]
+ignore_missing_imports = True
+[mypy-winter]
+ignore_missing_imports = True
+[mypy-asyncpg]
+ignore_missing_imports = True

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py3.7
+envlist = py3.8
 
 [testenv]
 deps = -rrequirements.txt