Compute analytics timeframe dynamically

resources/js/admin/mobile/lib/analytics.ts

@@ -5,3 +5,24 @@ export function resolveMaxCount(values: number[]): number {
 
   return Math.max(...values, 1);
 }
+
+export function resolveTimelineHours(timestamps: string[], fallbackHours = 12): number {
+  if (!Array.isArray(timestamps) || timestamps.length < 2) {
+    return fallbackHours;
+  }
+
+  const times = timestamps
+    .map((value) => new Date(value).getTime())
+    .filter((value) => Number.isFinite(value));
+
+  if (times.length < 2) {
+    return fallbackHours;
+  }
+
+  const min = Math.min(...times);
+  const max = Math.max(...times);
+  const diff = Math.max(0, max - min);
+  const hours = diff / (1000 * 60 * 60);
+
+  return Math.max(1, Math.round(hours));
+}