fix(icalendar): Support object rrule by converting to string

icalendar.ts

@@ -154,14 +154,23 @@ export function expandRecurrences(icsEvent: any, windowDays = 365): any[] {
   const rruleStr = icsEvent.rrule || (icsEvent as any).recurrenceRule;
   if (!rruleStr) return [icsEvent];
 
-  if (typeof rruleStr !== "string") {
-    console.warn(`[iCalendar] Invalid rrule type (${typeof rruleStr}) for event "${icsEvent.summary || "Untitled"}". Treating as non-recurring.`);
-    return [icsEvent];
-  }
-
   try {
     const set = new RRuleSet();
-    const cleanRule = rruleStr.replace(/^RRULE:/i, "");
+    
+    let cleanRule = "";
+    if (typeof rruleStr === "string") {
+        cleanRule = rruleStr.replace(/^RRULE:/i, "");
+    } else if (typeof rruleStr === "object" && rruleStr !== null) {
+        // Handle object rrule (e.g. from ts-ics) by converting back to string
+        cleanRule = Object.entries(rruleStr)
+            .map(([k, v]) => `${k.toUpperCase()}=${v}`)
+            .join(";");
+    } else {
+        console.warn(`[iCalendar] Invalid rrule type (${typeof rruleStr}) for event "${icsEvent.summary || "Untitled"}". Treating as non-recurring.`);
+        return [icsEvent];
+    }
+    
+    // We need to provide DTSTART if it's not in the string
     
     // We need to provide DTSTART if it's not in the string
     const dtstart = new Date(icsEvent.start.includes("Z") ? icsEvent.start : icsEvent.start + "Z");

icalendar_test.ts

@@ -196,13 +196,13 @@ Deno.test("expandRecurrences - object rrule (Reproduction of missing events)", (
 
   try {
     const results = expandRecurrences(icsEvent, 30);
-    // Currently, it returns [icsEvent] (length 1) and logs a warning.
+    // Should now return multiple occurrences
-    // This confirms that it is NOT expanding it.
+    assert(results.length > 1, `Expected > 1 occurrences, got ${results.length}`);
-    assertEquals(results.length, 1);
+    assertEquals(results[0].recurrent, true);
   } finally {
     console.warn = originalConsoleWarn;
   }
   
-  assert(warningLogged, "Should have logged a warning for object rrule");
+  assert(!warningLogged, "Should NOT have logged a warning for object rrule");
 });