feat: add backoff service and some message reactions

tests/test_svc.py

@@ -1,3 +1,6 @@
+import asyncio
+import time
+
 import pytest
 
 from src.huesoporro.models import ChatbotSettings, User
@@ -33,3 +36,61 @@ async def test_is_mod_svc_returns_false_for_user_not_in_modlist(
 ):
     is_mod = await is_mod_svc.run(user=user, username="TestUser2", channel=user.user)
     assert not is_mod
+
+
+async def test_backoff_svc_returns_for_first_attempt(
+    backoff_svc, backoff_callable, async_backoff_callable
+):
+    assert backoff_svc.call(backoff_callable) == "foo"
+
+    assert await backoff_svc.call_async(async_backoff_callable) == "async foo"
+
+
+async def test_backoff_svc_returns_none_for_second_attempt(
+    backoff_svc, backoff_callable, async_backoff_callable
+):
+    assert backoff_svc.call(backoff_callable) == "foo"
+    assert backoff_svc.call(backoff_callable) is None
+
+    assert await backoff_svc.call_async(async_backoff_callable) == "async foo"
+    assert await backoff_svc.call_async(async_backoff_callable) is None
+
+
+async def test_backoff_svc_returns_for_second_attempt_after_delay(
+    backoff_svc, backoff_callable, async_backoff_callable
+):
+    assert backoff_svc.call(backoff_callable) == "foo"
+    assert backoff_svc.call(backoff_callable) is None
+    time.sleep(3)
+    assert backoff_svc.call(backoff_callable) == "foo"
+
+    assert await backoff_svc.call_async(async_backoff_callable) == "async foo"
+    assert await backoff_svc.call_async(async_backoff_callable) is None
+    await asyncio.sleep(3)
+    assert await backoff_svc.call_async(async_backoff_callable) == "async foo"
+
+
+async def test_backoff_svc_raises_value_error_for_unknown_callable(backoff_svc):
+    with pytest.raises(ValueError, match="not registered with backoff service"):
+        backoff_svc.call(lambda: "foo")
+
+
+async def test_backoff_svc_raises_value_error_for_unknown_async_callable(backoff_svc):
+    with pytest.raises(ValueError, match="not registered with backoff service"):
+        await backoff_svc.call_async(lambda: "foo")
+
+
+async def test_backoff_svc_raises_value_error_for_async_called_from_sync(
+    backoff_svc, backoff_callable
+):
+    with pytest.raises(
+        ValueError, match="Cannot call sync function with .call_async()"
+    ):
+        await backoff_svc.call_async(backoff_callable)
+
+
+async def test_backoff_svc_raises_value_error_for_sync_called_from_async(
+    backoff_svc, async_backoff_callable
+):
+    with pytest.raises(ValueError, match="Cannot call async function with .call()"):
+        backoff_svc.call(async_backoff_callable)