feat(achievement): support obtain achievements

app/achievements/osu_combo.py

@@ -0,0 +1,61 @@
+from __future__ import annotations
+
+from functools import partial
+
+from app.database.score import Beatmap, Score
+from app.models.achievement import Achievement, Medals
+from app.models.score import GameMode
+
+from sqlmodel.ext.asyncio.session import AsyncSession
+
+
+async def process_combo(
+    combo: int,
+    next_combo: int,
+    session: AsyncSession,
+    score: Score,
+    beatmap: Beatmap,
+) -> bool:
+    if (
+        not score.passed
+        or not beatmap.beatmap_status.has_pp()
+        or score.gamemode != GameMode.OSU
+    ):
+        return False
+    if combo < 1:
+        return False
+    if next_combo != 0 and combo >= next_combo:
+        return False
+    if combo <= score.max_combo < next_combo:
+        return True
+    elif next_combo == 0 and score.max_combo >= combo:
+        return True
+    return False
+
+
+MEDALS: Medals = {
+    Achievement(
+        id=21,
+        name="500 Combo",
+        desc="500 big ones! You''re moving up in the world!",
+        assets_id="osu-combo-500",
+    ): partial(process_combo, 500, 750),
+    Achievement(
+        id=22,
+        name="750 Combo",
+        desc="750 notes back to back? Woah.",
+        assets_id="osu-combo-750",
+    ): partial(process_combo, 750, 1000),
+    Achievement(
+        id=23,
+        name="1000 Combo",
+        desc="A thousand reasons why you rock at this game.",
+        assets_id="osu-combo-1000",
+    ): partial(process_combo, 1000, 2000),
+    Achievement(
+        id=24,
+        name="2000 Combo",
+        desc="Nothing can stop you now.",
+        assets_id="osu-combo-2000",
+    ): partial(process_combo, 2000, 0),
+}