General tracker.py improvements

Mostly speed-ups by awaiting multiple awaits where there's not a dependency on each other's results, and bounds checks

requirements.txt

@@ -21,4 +21,5 @@ six==1.16.0
 sniffio==1.3.1
 tomli==2.0.1
 typing_extensions==4.12.2
+uvloop==0.21.0
 yarl==1.9.4

token_bot/history_manager/history_manager.py

@@ -25,7 +25,7 @@ class HistoryManager:
         high_fidelity_history = await self._tdb.history(flavor, region, self.HIGH_FIDELITY_PERIOD)
         final_response = []
 
-        def _convert_to_datetime(data: Tuple[str, int]):
+        def _convert_to_datetime(data: Tuple[str, int]) -> Tuple[datetime.datetime, int]:
             return datetime.datetime.fromisoformat(data[0]), data[1]
 
         for data_point in all_history:

token_bot/tracker.py

@@ -157,7 +157,7 @@ class Tracker(Extension):
 
     @slash_command(
         name="add-alert",
-        description="List all alerts you have signed up for"
+        description="Add an alert listener"
     )
     async def add_alert(self, ctx: SlashContext):
         if not await self._users.exists(ctx.user.id):
@@ -184,8 +184,10 @@ class Tracker(Extension):
         else:
             alert = Alert(alert_type, flavor, user.region)
             if not await self._users.is_subscribed(user, alert):
-                await self._users.add_alert(user, alert)
-                await self._alerts.add_user(alert, user)
+                await asyncio.gather(
+                    self._users.add_alert(user, alert),
+                    self._alerts.add_user(alert, user)
+                )
                 await ctx.send("Successfully added alert", ephemeral=True)
 
             else:
@@ -197,14 +199,26 @@ class Tracker(Extension):
         description="Remove an alert you have signed up for"
     )
     async def remove_alert(self, ctx: SlashContext):
+        if not await self._users.exists(ctx.user.id):
+            await ctx.send("You are not registered with any region\n"
+                           "Please register with /register before adding alerts",
+                           ephemeral=True)
+            return
         user = await self._users.get(ctx.user.id)
+        alerts = await self._users.list_alerts(user)
+        if len(alerts) == 0:
+            await ctx.send("You do not have any alerts registered", ephemeral=True)
+            return
+
         try:
             alert = await self.remove_alert_select_menu(ctx, user)
         except TimeoutError:
             return
         else:
-            await self._users.remove_alert(user, alert)
-            await self._alerts.remove_user(alert, user)
+            await asyncio.gather(
+                self._users.remove_alert(user, alert),
+                self._alerts.remove_user(alert, user)
+            )
             await ctx.send("Successfully removed alert", ephemeral=True)