feat: src/useRecurring.ts (#17)

Author: tapiwamakandigona

src/useRecurring.ts

@@ -0,0 +1,34 @@
+import { useCallback } from "react";
+
+type Frequency = "daily" | "weekly" | "monthly";
+
+interface RecurringTask {
+  text: string;
+  category: string;
+  priority: "low" | "medium" | "high";
+  frequency: Frequency;
+  lastCreated: number;
+}
+
+const INTERVALS: Record<Frequency, number> = {
+  daily: 86400000,
+  weekly: 604800000,
+  monthly: 2592000000,
+};
+
+export function useRecurring(
+  recurringTasks: RecurringTask[],
+  addTodo: (text: string, category: string, priority: "low" | "medium" | "high") => void
+) {
+  const checkAndCreate = useCallback(() => {
+    const now = Date.now();
+    for (const task of recurringTasks) {
+      if (now - task.lastCreated >= INTERVALS[task.frequency]) {
+        addTodo(task.text, task.category, task.priority);
+        task.lastCreated = now;
+      }
+    }
+  }, [recurringTasks, addTodo]);
+
+  return { checkAndCreate };
+}