Implement task queue and notifications

client/task-queue.js

@@ -0,0 +1,62 @@
+"use strict";
+
+import * as store from "./store";
+
+const queue = new Set();
+const staging = new Set();
+
+function queueTask(task) {
+  staging.delete(task);
+  task.status = "queued";
+  queue.add(task);
+}
+
+function deleteTask(task) {
+  staging.delete(task);
+  queue.delete(task);
+}
+
+function getQueue() {
+  return queue;
+}
+
+function clear() {
+  queue.clear();
+}
+
+function getStaging() {
+  return staging;
+}
+
+function clearStaging() {
+  staging.clear();
+}
+
+function stageSpv(task) {
+  staging.add(task);
+}
+
+function commit(tasks, callback) {
+  for (let t of tasks) {
+    t.status = "pending";
+    queue.add(t);
+  }
+
+  return store.postTasks(tasks, (deviceId, connectionRequestStatus, tasks2) => {
+    for (let t of tasks2)
+      if (t.status === "pending") t.status = "stale";
+      else if (t.status === "done") queue.delete(t);
+    if (callback) callback(deviceId, connectionRequestStatus, tasks2);
+  });
+}
+
+export {
+  queueTask,
+  deleteTask,
+  clear,
+  getQueue,
+  getStaging,
+  clearStaging,
+  stageSpv,
+  commit
+};