Attempt to work around timezones

modules/reminder.py

@@ -2,25 +2,25 @@ import logging
 from datetime import datetime, timedelta, timezone
 
 from libbot.pyrogram.classes import PyroClient
-from pytz import timezone as pytz_timezone
 
 from classes.enums import GarbageType
 from classes.location import Location
 from classes.pyrouser import PyroUser
 from modules.database import col_entries, col_users
+from modules.utils import from_utc
 
 logger = logging.getLogger(__name__)
 
 
 async def remind(app: PyroClient) -> None:
-    now = datetime.now()
+    utcnow = datetime.utcnow()
 
     users = await col_users.find(
-        {"time_hour": now.hour, "time_minute": now.minute}
+        {"time_hour": utcnow.hour, "time_minute": utcnow.minute}
     ).to_list()
 
     for user_db in users:
-        user = PyroUser(**user_db)
+        user = await PyroUser.from_dict(**user_db)
 
         if not user.enabled or user.location is None:
             continue
@@ -30,12 +30,10 @@ async def remind(app: PyroClient) -> None:
         except ValueError:
             continue
 
-        user_date = (
-            datetime.now(pytz_timezone(location.timezone)).replace(
-                second=0, microsecond=0
-            )
-            + timedelta(days=user.offset)
-        ).replace(tzinfo=timezone.utc)
+        user_date = from_utc(
+            datetime(1970, 1, 1, user.time_hour, user.time_minute),
+            user.location.timezone.zone,
+        )
 
         entries = await col_entries.find(
             {

modules/utils.py

@@ -0,0 +1,38 @@
+from datetime import datetime
+from typing import Union
+
+from pytz import UTC
+from pytz import timezone as pytz_timezone
+
+
+def to_utc(date: datetime, timezone: Union[str, None] = None) -> datetime:
+    """Move timezone unaware datetime object to UTC timezone and return it.
+
+    ### Args:
+        * date (`datetime`): Datetime to be converted.
+        * timezone (`Union[str, None] = None`): Timezone name (must be pytz-compatible). Defaults to `None` (UTC).
+
+    ### Returns:
+        * `datetime`: Timezone unaware datetime in UTC with timezone's offset applied to it.
+    """
+    timezone = "UTC" if timezone is None else timezone
+    return pytz_timezone(timezone).localize(date).astimezone(UTC).replace(tzinfo=None)
+
+
+def from_utc(date: datetime, timezone: Union[str, None] = None) -> datetime:
+    """Move timezone unaware datetime object to the timezone specified and return it.
+
+    ### Args:
+        * date (`datetime`): Datetime to be converted.
+        * timezone (`Union[str, None] = None`): Timezone name (must be pytz-compatible). Defaults to `None` (UTC).
+
+    ### Returns:
+        * `datetime`: Timezone unaware datetime in timezone provided with offset from UTC applied to it.
+    """
+    timezone = "UTC" if timezone is None else timezone
+    return (
+        pytz_timezone("UTC")
+        .localize(date)
+        .astimezone(pytz_timezone(timezone))
+        .replace(tzinfo=None)
+    )