From de160f4fe774e0ed60b8a5f6605857f6bf33f1a9 Mon Sep 17 00:00:00 2001
From: Chuck <33324927+ChuckBuilds@users.noreply.github.com>
Date: Sat, 3 Oct 2026 22:13:33 -0400
Subject: [PATCH] fix(calendar): hash calendar IDs in the events cache key
 (1.2.12)

The cache key joined every selected calendar ID and becomes a filename.
With a few long Google calendar IDs (holidays, sports) it ran past the
255-byte filename limit, so every write failed ("Could not write cache")
and events were refetched from Google on every update. The key now
carries a 16-char sha256 of the sorted IDs instead.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 plugins.json                   |  7 +++----
 plugins/calendar/manager.py    | 10 ++++++++--
 plugins/calendar/manifest.json |  8 +++++++-
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/plugins.json b/plugins.json
index fcd23da6..d278272a 100644
--- a/plugins.json
+++ b/plugins.json
@@ -129,12 +129,11 @@
       "plugin_path": "plugins/calendar",
       "stars": 0,
       "downloads": 0,
-      "last_updated": "2026-10-02",
+      "last_updated": "2026-10-03",
       "verified": true,
       "screenshot": "",
-      "latest_version": "1.2.11",
-      "ledmatrix_min_version": "3.3.0",
-      "commit": "886d2038d22a35c962beac0ea261543339cffec9"
+      "latest_version": "1.2.12",
+      "ledmatrix_min_version": "3.3.0"
     },
     {
       "id": "christmas-countdown",
diff --git a/plugins/calendar/manager.py b/plugins/calendar/manager.py
index 97a70a9d..4d1ecbf5 100644
--- a/plugins/calendar/manager.py
+++ b/plugins/calendar/manager.py
@@ -16,6 +16,7 @@
 API Version: 1.0.1
 """
 
+import hashlib
 import os
 import logging
 import time
@@ -407,8 +408,13 @@ def update(self) -> None:
             self.logger.warning("Calendar service not available - authentication may be required")
             return
         
-        # Check cache first
-        cache_key = f"{self.plugin_id}_events_{'_'.join(sorted(self.calendars))}"
+        # Check cache first. The calendar IDs are hashed, not joined into the
+        # key: the key becomes a filename, and a few long Google calendar IDs
+        # (holidays, sports) push it past the filesystem's 255-byte limit.
+        calendars_digest = hashlib.sha256(
+            '\n'.join(sorted(self.calendars)).encode('utf-8')
+        ).hexdigest()[:16]
+        cache_key = f"{self.plugin_id}_events_{calendars_digest}"
         cached_events = self.cache_manager.get(cache_key, max_age=self.update_interval)
         
         if cached_events is not None:
diff --git a/plugins/calendar/manifest.json b/plugins/calendar/manifest.json
index 052d82b1..a9ae00e2 100644
--- a/plugins/calendar/manifest.json
+++ b/plugins/calendar/manifest.json
@@ -1,7 +1,7 @@
 {
   "id": "calendar",
   "name": "Google Calendar",
-  "version": "1.2.11",
+  "version": "1.2.12",
   "author": "ChuckBuilds",
   "description": "Display upcoming events from Google Calendar with date, time, and event details. Shows next 1-3 events with automatic rotation and timezone support.",
   "category": "productivity",
@@ -35,6 +35,12 @@
     }
   ],
   "versions": [
+    {
+      "version": "1.2.12",
+      "released": "2026-10-03",
+      "ledmatrix_min_version": "3.3.0",
+      "notes": "The events cache key now carries a short hash of the selected calendar IDs instead of the IDs themselves. The key becomes a filename, and with a few long Google calendar IDs (holidays, sports) it ran past the 255-byte filename limit, so every write failed with 'Could not write cache' and the calendar refetched from Google on every update. Core floor unchanged."
+    },
     {
       "version": "1.2.11",
       "released": "2026-10-02",