new display date parser inbox mail (#23)

Author: LennartSchmidtKern

date-parser.ts

@@ -44,4 +44,79 @@ export function parseTaskDate(dateStr: string): number {
     if (!dateStr) return null;
     const fixed = dateStr.replace(/(\.\d{3})\d+/, '$1');
     return new Date(fixed + 'Z').getTime();
+}
+
+export function formatDisplayTimestamp(createdAt: string): string {
+    if (!createdAt) return "<unknown>";
+    const date = parseUTCToLocal(createdAt);
+    const now = new Date();
+
+    const isSameDay = (d1: Date, d2: Date) =>
+        d1.getFullYear() === d2.getFullYear() &&
+        d1.getMonth() === d2.getMonth() &&
+        d1.getDate() === d2.getDate();
+
+    if (isSameDay(date, now)) {
+        const hours = date.getHours().toString().padStart(2, "0");
+        const minutes = date.getMinutes().toString().padStart(2, "0");
+        return `${hours}:${minutes}`;
+    }
+
+    const yesterday = new Date();
+    yesterday.setDate(now.getDate() - 1);
+    if (isSameDay(date, yesterday)) {
+        return "Yesterday";
+    }
+
+    const weekdays = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
+    const weekday = weekdays[date.getDay()];
+    const day = date.getDate().toString().padStart(2, "0");
+    const month = (date.getMonth() + 1).toString().padStart(2, "0");
+    const year = date.getFullYear().toString().slice(-2);
+
+    return `${weekday}, ${day}.${month}.${year}`;
+}
+
+export function parseUTCToLocal(dateString: string): Date {
+    const d = new Date(dateString);
+
+    if (!/[zZ]|[+-]\d{2}:?\d{2}$/.test(dateString)) {
+        const parts = dateString.split(/[-T: ]/).map(Number);
+        return new Date(Date.UTC(parts[0], parts[1] - 1, parts[2], parts[3], parts[4] || 0, parts[5] || 0));
+    }
+
+    return d;
+}
+
+export function formatDisplayTimestampFull(createdAt: string): string {
+    const date = parseUTCToLocal(createdAt);
+    const now = new Date();
+
+    const diffMs = now.getTime() - date.getTime();
+    const diffMinutes = Math.floor(diffMs / (1000 * 60));
+    const diffHours = Math.floor(diffMinutes / 60);
+    const diffDays = Math.floor(diffHours / 24);
+
+    const weekdays = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
+    const weekday = weekdays[date.getDay()];
+    const day = date.getDate().toString().padStart(2, "0");
+    const month = (date.getMonth() + 1).toString().padStart(2, "0");
+    const year = date.getFullYear().toString().padStart(4, "0");
+    const hours = date.getHours().toString().padStart(2, "0");
+    const minutes = date.getMinutes().toString().padStart(2, "0");
+
+    let relative = "";
+    if (diffMinutes < 1) {
+        relative = "(just now)";
+    } else if (diffMinutes < 60) {
+        relative = `(${diffMinutes} minute${diffMinutes !== 1 ? "s" : ""} ago)`;
+    } else if (diffHours < 24) {
+        relative = `(${diffHours} hour${diffHours !== 1 ? "s" : ""} ago)`;
+    } else if (diffDays === 1) {
+        relative = `(yesterday)`;
+    } else {
+        relative = `(${diffDays} day${diffDays !== 1 ? "s" : ""} ago)`;
+    }
+
+    return `${weekday}, ${day}.${month}.${year} ${hours}:${minutes} ${relative}`;
 }