From fe31c9e52edb11da8a3a2233619280af50b02080 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rn-Michael=20Miehe?=
 <40151420+ldericher@users.noreply.github.com>
Date: Sun, 4 Sep 2022 20:50:11 +0000
Subject: [PATCH] async _get_calendar_events

---
 api/ovdashboard_api/dav_calendar.py | 64 +++++++++++++++++------------
 1 file changed, 37 insertions(+), 27 deletions(-)

diff --git a/api/ovdashboard_api/dav_calendar.py b/api/ovdashboard_api/dav_calendar.py
index 9376955..e0209ec 100644
--- a/api/ovdashboard_api/dav_calendar.py
+++ b/api/ovdashboard_api/dav_calendar.py
@@ -5,7 +5,7 @@ from typing import Iterator
 
 from caldav import Calendar
 from pydantic import BaseModel
-from vobject.base import VBase
+from vobject.icalendar import VEvent
 
 from . import caldav_principal, get_ttl_hash, run_in_executor, timed_alru_cache
 
@@ -26,14 +26,43 @@ async def _get_calendar(
 
     @run_in_executor
     def _get_calendar_inner() -> Calendar:
-        _logger.info(f"updating {calendar_name}")
-        print(f"updating {calendar_name}")
-
         return caldav_principal().calendar(calendar_name)
 
     return await _get_calendar_inner()
 
 
+@timed_alru_cache(maxsize=20)
+async def _get_calendar_events(
+    calendar_name: str,
+) -> list[CalEvent]:
+
+    @run_in_executor
+    def _inner() -> Iterator[VEvent]:
+        _logger.info(f"updating {calendar_name}")
+        print(f"updating {calendar_name}")
+
+        calendar = caldav_principal().calendar(calendar_name)
+        return (
+            vevent
+            for event in calendar.date_search(
+                start=datetime.now(),
+                end=datetime.now() + timedelta(days=365),
+                expand=True,
+            )
+            for vevent in event.vobject_instance.contents["vevent"]
+        )
+
+    return [
+        CalEvent(
+            summary=vevent.summary.value,
+            description=vevent.description.value,
+            dtstart=vevent.dtstart.value,
+            dtend=vevent.dtend.value,
+        )
+        for vevent in await _inner()
+    ]
+
+
 @dataclass(frozen=True)
 class DavCalendar:
     calendar_name: str
@@ -46,27 +75,8 @@ class DavCalendar:
         )
 
     @property
-    async def events(self) -> Iterator[CalEvent]:
-
-        async def _find_vevents() -> Iterator[VBase]:
-            calendar = await self.calendar
-
-            return (
-                vevent
-                for event in calendar.date_search(
-                    start=datetime.now(),
-                    end=datetime.now() + timedelta(days=365),
-                    expand=True,
-                )
-                for vevent in event.vobject_instance.contents["vevent"]
-            )
-
-        return (
-            CalEvent(
-                summary=vevent.summary.value,
-                description=vevent.description.value,
-                dtstart=vevent.dtstart.value,
-                dtend=vevent.dtend.value,
-            )
-            for vevent in await _find_vevents()
+    async def events(self) -> list[CalEvent]:
+        return await _get_calendar_events(
+            ttl_hash=get_ttl_hash(20),
+            calendar_name=self.calendar_name,
         )