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import { LOG } from "@/utilities/console";
import {
hideNotification,
showNotification,
updateNotification,
} from "@mantine/notifications";
import { uniqueId } from "lodash";
import { notification } from "./notification";
class TaskDispatcher {
private running: boolean;
private tasks: Record<string, Task.Callable[]> = {};
private progress: Record<string, boolean> = {};
constructor() {
this.running = false;
this.tasks = {};
this.progress = {};
window.addEventListener("beforeunload", this.onBeforeUnload.bind(this));
}
private onBeforeUnload(e: BeforeUnloadEvent) {
const message = "Background tasks are still running";
if (Object.keys(this.tasks).length > 0) {
e.preventDefault();
e.returnValue = message;
return;
}
delete e["returnValue"];
}
private update() {
if (this.running) {
return;
}
LOG("info", "Starting background task queue");
this.running = true;
const queue = window.queueMicrotask?.bind(window) ?? setTimeout;
queue(async () => {
while (Object.keys(this.tasks).length > 0) {
const groups = Object.keys(this.tasks);
for await (const group of groups) {
const tasks = this.tasks[group];
const taskId = group;
for (let index = 0; index < tasks.length; index++) {
const task = tasks[index];
const notifyInProgress = notification.progress.update(
taskId,
group,
task.description,
index,
tasks.length,
);
updateNotification(notifyInProgress);
try {
await task(...task.parameters);
} catch (error) {
// TODO
}
}
const notifyEnd = notification.progress.end(taskId, group);
updateNotification(notifyEnd);
delete this.tasks[group];
}
}
this.running = false;
});
}
public create<T extends Task.AnyCallable>(
name: string,
group: string,
callable: T,
...parameters: Parameters<T>
): Task.Ref {
// Clone this function
const task = callable.bind({}) as Task.Callable<T>;
task.parameters = parameters;
task.description = name;
task.id = uniqueId("task");
if (this.tasks[group] === undefined) {
this.tasks[group] = [];
const notifyStart = notification.progress.pending(group, group);
showNotification(notifyStart);
}
this.tasks[group].push(task);
this.update();
return task.id;
}
public updateProgress(items: Site.Progress[]) {
items.forEach((item) => {
// TODO: FIX ME!
item.value += 1;
if (item.value >= item.count && this.progress[item.id]) {
updateNotification(notification.progress.end(item.id, item.header));
delete this.progress[item.id];
} else if (item.value > 1 && this.progress[item.id]) {
updateNotification(
notification.progress.update(
item.id,
item.header,
item.name,
item.value,
item.count,
),
);
} else if (item.value > 1 && this.progress[item.id] === undefined) {
showNotification(notification.progress.pending(item.id, item.header));
this.progress[item.id] = true;
setTimeout(() => this.updateProgress([item]), 1000);
}
});
}
public removeProgress(ids: string[]) {
setTimeout(
() => ids.forEach(hideNotification),
notification.PROGRESS_TIMEOUT,
);
}
}
export const task = new TaskDispatcher();
export * from "./group";
export * from "./notification";
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