initial commit

app/composables/useTasks.ts

@@ -0,0 +1,21 @@
+type TaskHandle = number
+
+export const useTasks = () => {
+    const taskQueue = useState<Set<number>>('spinner:taskQueue', () => new Set())
+    const taskId = useState<number>('spinner:taskId', () => 1)
+    const hasTasks = computed(() => taskQueue.value.size > 0)
+
+    const addTask = (): TaskHandle => {
+        const handle = taskId.value++
+        taskQueue.value = new Set(taskQueue.value).add(handle)
+        return handle
+    }
+
+    const completeTask = (handle: TaskHandle) => {
+        const newSet = new Set(taskQueue.value)
+        newSet.delete(handle)
+        taskQueue.value = newSet
+    }
+
+    return { hasTasks, addTask, completeTask }
+}