custom tags

carry-your-live/src/utils/icalParser.ts

@@ -0,0 +1,156 @@
+function parseICal(content: string): Array<{
+  title: string;
+  description?: string;
+  start: Date;
+  end?: Date;
+  allDay?: boolean;
+  rrule?: string;
+  uid?: string;
+  priority?: number;
+}> {
+  const events: Array<{
+    title: string;
+    description?: string;
+    start: Date;
+    end?: Date;
+    allDay?: boolean;
+    rrule?: string;
+    uid?: string;
+    priority?: number;
+  }> = [];
+
+  const lines = content.split('\n');
+  let i = 0;
+
+  while (i < lines.length) {
+    const line = lines[i].trim();
+    if (!line) {
+      i++;
+      continue;
+    }
+
+    if (line.startsWith('BEGIN:VEVENT')) {
+      const event: {
+        title: string;
+        description?: string;
+        start: Date;
+        end?: Date;
+        allDay?: boolean;
+        rrule?: string;
+        uid?: string;
+        priority?: number;
+      } = {
+        title: '',
+        start: new Date(0),
+      };
+
+      i++;
+      let inEvent = true;
+
+      while (i < lines.length && inEvent) {
+        const line = lines[i].trim();
+        i++;
+
+        if (line === 'END:VEVENT') {
+          inEvent = false;
+          continue;
+        }
+
+        if (line.startsWith('END:')) {
+          inEvent = false;
+          continue;
+        }
+
+        if (line.startsWith('SUMMARY:')) {
+          event.title = line.substring(8).trim();
+        } else if (line.startsWith('DESCRIPTION:')) {
+          event.description = line.substring(12).trim();
+        } else if (line.startsWith('DTSTART:')) {
+          const dateStr = line.substring(8).trim();
+          event.start = parseICalDateTime(dateStr);
+        } else if (line.startsWith('DTEND:')) {
+          const dateStr = line.substring(6).trim();
+          event.end = parseICalDateTime(dateStr);
+        } else if (line.startsWith('DTSTAMP:')) {
+          // ignore, we use start date
+        } else if (line.startsWith('UID:')) {
+          event.uid = line.substring(4).trim();
+        } else if (line.startsWith('PRIORITY:')) {
+          event.priority = parseInt(line.substring(9).trim(), 10);
+        } else if (line.startsWith('ALL-DAY:')) {
+          event.allDay = line.substring(10).trim().toLowerCase() === 'true';
+        } else if (line.startsWith('RRULE:')) {
+          event.rrule = line.substring(6).trim();
+        } else if (line.startsWith('BEGIN:VALARM')) {
+          // skip alarms
+          i++;
+          let inAlarm = true;
+          while (i < lines.length && inAlarm) {
+            const alarmLine = lines[i].trim();
+            i++;
+            if (alarmLine === 'END:VALARM') {
+              inAlarm = false;
+            }
+          }
+        } else {
+          // skip unrecognized lines
+        }
+      }
+
+      if (event.title) {
+        events.push(event);
+      }
+    } else {
+      i++;
+    }
+  }
+
+  return events;
+}
+
+function parseICalDateTime(dateStr: string): Date {
+  // Handle various iCal date/time formats
+  // Format 1: YYYYMMDDTHHMMSSZ (UTC)
+  // Format 2: YYYYMMDDTHHMMSS (local)
+  // Format 3: YYYYMMDD (date only)
+  // Format 4: TZID:... (with timezone)
+
+  let datePart = '';
+  let timePart = '';
+  let hasTime = false;
+
+  // Check for Z (UTC) indicator
+  const hasZ = dateStr.endsWith('Z');
+  const cleanStr = hasZ ? dateStr.slice(0, -1) : dateStr;
+
+  // Try to split at T
+  const tIndex = cleanStr.indexOf('T');
+  if (tIndex !== -1) {
+    datePart = cleanStr.substring(0, tIndex);
+    timePart = cleanStr.substring(tIndex + 1);
+    hasTime = true;
+  } else {
+    datePart = cleanStr;
+  }
+
+  // Parse date (YYYYMMDD)
+  if (datePart.length >= 8) {
+    const year = parseInt(datePart.substring(0, 4), 10);
+    const month = parseInt(datePart.substring(4, 6), 10) - 1; // 0-indexed
+    const day = parseInt(datePart.substring(6, 8), 10);
+    const date = new Date(year, month, day);
+
+    if (hasTime && timePart) {
+      const hour = parseInt(timePart.substring(0, 2), 10);
+      const minute = parseInt(timePart.substring(2, 4), 10);
+      date.setHours(hour, minute, 0, 0);
+    }
+
+    return date;
+  }
+
+  // Fallback: try Date.parse
+  return new Date(dateStr);
+}
+
+export default parseICal;