First commit

web/src/modules/at.ts

@@ -0,0 +1,63 @@
+/*
+   Copyright 2026 kanreisa
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+export type ScheduleId = string;
+export type ScheduleTask = () => void;
+
+const map: Record<ScheduleId, [number, ScheduleTask]> = {};
+let count = 0;
+let intervalId: ReturnType<typeof setInterval>;
+
+export function setSchedule(time: number, task: ScheduleTask): ScheduleId {
+    const id = (++count).toString(10);
+    map[id] = [time, task];
+
+    console.debug("at", "setSchedule()", id, map[id]);
+
+    return id;
+}
+
+export function clearSchedule(id: ScheduleId): void {
+    console.debug("at", "clearSchedule()", id, map[id]);
+
+    delete map[id];
+}
+
+export function init(interval = 1000) {
+    if (intervalId) {
+        clearInterval(intervalId);
+    }
+    intervalId = setInterval(() => run(), interval);
+}
+
+export function deinit() {
+    if (intervalId) {
+        clearInterval(intervalId);
+    }
+}
+
+function run() {
+    const now = Date.now();
+
+    for (const id in map) {
+        const [time, task] = map[id];
+        if (time <= now) {
+            console.debug("at", "run()", id, map[id]);
+
+            delete map[id];
+            task();
+        }
+    }
+}