Bump version to 0.2.13 and improve date processing stability

PLUG.md

@@ -1,6 +1,6 @@
 ---
 name: Library/sstent/icalendar/PLUG
-version: 0.2.12
+version: 0.2.13
 tags: meta/library
 files:
 - icalendar.plug.js

icalendar.ts

@@ -1,7 +1,7 @@
 import { clientStore, config, datastore, editor, index } from "@silverbulletmd/silverbullet/syscalls";
 import { convertIcsCalendar, type IcsCalendar, type IcsEvent, type IcsDateObjects } from "ts-ics";
 
-const VERSION = "0.2.12";
+const VERSION = "0.2.13";
 const CACHE_KEY = "icalendar:lastSync";
 const DEFAULT_CACHE_DURATION_SECONDS = 21600; // 6 hours
 
@@ -53,38 +53,10 @@ interface CalendarEvent extends DateToString<IcsEvent> {
 // ============================================================================
 
 /**
- * Robustly converts an ICS date object to a localized PST string
+ * Standard SilverBullet local date string formatter
  */
-function processIcsDate(obj: any, manualShift = 0): string {
-  // 1. Get the "Wall Time" (e.g., 16:00)
-  // If ts-ics provides a 'local' date string, it's usually the wall time but incorrectly marked as UTC
-  const wallTimeStr = (obj.local && typeof obj.local.date === "string") 
-    ? obj.local.date 
-    : (typeof obj.date === "string" ? obj.date : "");
-    
-  if (!wallTimeStr) return "";
-
-  // 2. Parse it as if it were UTC to get a base date object
-  // We remove the 'Z' if it exists to ensure we control the parsing
-  const baseDate = new Date(wallTimeStr.replace("Z", "") + "Z");
-  
-  // 3. Determine the Source Offset (e.g., W. Europe = +1)
-  const tzName = obj.local?.timezone || obj.timezone || "UTC";
-  const sourceOffset = TIMEZONE_OFFSETS[tzName] || 0;
-  
-  // 4. Calculate the TRUE UTC time
-  // UTC = WallTime - SourceOffset
-  let utcTime = baseDate.getTime() - (sourceOffset * 3600000);
-  
-  // 5. Apply User's Manual Shift (if any)
-  if (manualShift !== 0) {
-    utcTime += (manualShift * 3600000);
-  }
-
-  // 6. Localize to the browser's current timezone (PST)
-  const d = new Date(utcTime);
+function toLocalISO(d: Date): string {
   const pad = (n: number) => String(n).padStart(2, "0");
-  
   return d.getFullYear() +
     "-" + pad(d.getMonth() + 1) +
     "-" + pad(d.getDate()) +
@@ -94,6 +66,33 @@ function processIcsDate(obj: any, manualShift = 0): string {
     "." + String(d.getMilliseconds()).padStart(3, "0");
 }
 
+/**
+ * Robustly converts an ICS date object to a localized PST string
+ */
+function processIcsDate(obj: any, manualShift = 0): string {
+  if (!obj) return "";
+
+  // Handle case where it's already a Date object
+  if (obj instanceof Date) {
+    return toLocalISO(new Date(obj.getTime() + (manualShift * 3600000)));
+  }
+
+  // Extract the underlying Date object from the ts-ics structure
+  const baseDate = obj.date instanceof Date ? obj.date : null;
+  if (!baseDate) return "";
+
+  // If ts-ics gave us a 'local' field, it has already tried to parse the TZID
+  const tzName = obj.local?.timezone || obj.timezone || "UTC";
+  const sourceOffset = TIMEZONE_OFFSETS[tzName] || 0;
+  
+  // Calculate the TRUE UTC time if it wasn't already in UTC
+  // WallTime (baseDate) - SourceOffset = UTC
+  const utcTime = baseDate.getTime() - (sourceOffset * 3600000);
+  
+  // Create final localized date
+  return toLocalISO(new Date(utcTime + (manualShift * 3600000)));
+}
+
 function isIcsDateObjects(obj: any): obj is IcsDateObjects {
   return obj && typeof obj === 'object' && ('date' in obj && 'type' in obj);
 }
@@ -114,10 +113,7 @@ function convertDatesToStrings<T>(obj: T, hourShift = 0): DateToString<T> {
   }
 
   if (obj instanceof Date) {
-    // Fallback for raw Date objects
-    const d = new Date(obj.getTime() + (hourShift * 3600000));
-    const pad = (n: number) => String(n).padStart(2, "0");
-    return d.getFullYear() + "-" + pad(d.getMonth() + 1) + "-" + pad(d.getDate()) + "T" + pad(d.getHours()) + ":" + pad(d.getMinutes()) + ":" + pad(d.getSeconds()) + ".000" as DateToString<T>;
+    return toLocalISO(new Date(obj.getTime() + (hourShift * 3600000))) as DateToString<T>;
   }
 
   if (Array.isArray(obj)) {
@@ -217,9 +213,10 @@ export async function clearCache() {
     allKeys.push(["idx", ...key.slice(2), "$icalendar"]);
   }
   if (allKeys.length > 0) await datastore.batchDel(allKeys);
+  await clientStore.del(CACHE_KEY);
   await editor.flashNotification("Calendar index cleared", "info");
 }
 
 export async function showVersion() {
   await editor.flashNotification(`iCalendar Plug ${VERSION}`, "info");
-}
+}