add scheduler, cleanup module (#9346)

packages/opencode/src/scheduler/index.ts

@@ -0,0 +1,61 @@
+import { Instance } from "../project/instance"
+import { Log } from "../util/log"
+
+export namespace Scheduler {
+  const log = Log.create({ service: "scheduler" })
+
+  export type Task = {
+    id: string
+    interval: number
+    run: () => Promise<void>
+    scope?: "instance" | "global"
+  }
+
+  type Timer = ReturnType<typeof setInterval>
+  type Entry = {
+    tasks: Map<string, Task>
+    timers: Map<string, Timer>
+  }
+
+  const create = (): Entry => {
+    const tasks = new Map<string, Task>()
+    const timers = new Map<string, Timer>()
+    return { tasks, timers }
+  }
+
+  const shared = create()
+
+  const state = Instance.state(
+    () => create(),
+    async (entry) => {
+      for (const timer of entry.timers.values()) {
+        clearInterval(timer)
+      }
+      entry.tasks.clear()
+      entry.timers.clear()
+    },
+  )
+
+  export function register(task: Task) {
+    const scope = task.scope ?? "instance"
+    const entry = scope === "global" ? shared : state()
+    const current = entry.timers.get(task.id)
+    if (current && scope === "global") return
+    if (current) clearInterval(current)
+
+    entry.tasks.set(task.id, task)
+    void run(task)
+    const timer = setInterval(() => {
+      void run(task)
+    }, task.interval)
+    timer.unref()
+    entry.timers.set(task.id, timer)
+  }
+
+  async function run(task: Task) {
+    log.info("run", { id: task.id })
+    await task.run().catch((error) => {
+      log.error("run failed", { id: task.id, error })
+    })
+  }
+}