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import { keys } from "lodash";
import {
siteAddProgress,
siteRemoveProgress,
siteUpdateNotifier,
siteUpdateProgressCount,
} from "../../@redux/actions";
import store from "../../@redux/store";
// A background task manager, use for dispatching task one by one
class BackgroundTask {
private groups: Task.Group;
constructor() {
this.groups = {};
window.addEventListener("beforeunload", this.onBeforeUnload.bind(this));
}
private onBeforeUnload(e: BeforeUnloadEvent) {
const message = "Background tasks are still running";
if (Object.keys(this.groups).length !== 0) {
e.preventDefault();
e.returnValue = message;
return;
}
delete e["returnValue"];
}
dispatch<T extends Task.Callable>(groupName: string, tasks: Task.Task<T>[]) {
if (groupName in this.groups) {
this.groups[groupName].push(...tasks);
store.dispatch(
siteUpdateProgressCount({
id: groupName,
count: this.groups[groupName].length,
})
);
return;
}
this.groups[groupName] = tasks;
setTimeout(async () => {
for (let index = 0; index < tasks.length; index++) {
const task = tasks[index];
store.dispatch(
siteAddProgress([
{
id: groupName,
header: groupName,
name: task.name,
value: index,
count: tasks.length,
},
])
);
try {
await task.callable(...task.parameters);
} catch (error) {
// TODO
}
}
delete this.groups[groupName];
store.dispatch(siteRemoveProgress([groupName]));
});
}
find(groupName: string, id: number) {
if (groupName in this.groups) {
return this.groups[groupName].find((v) => v.id === id) !== undefined;
}
return false;
}
has(groupName: string) {
return groupName in this.groups;
}
hasId(ids: number[]) {
for (const id of ids) {
for (const key in this.groups) {
const tasks = this.groups[key];
if (tasks.find((v) => v.id === id) !== undefined) {
return true;
}
}
}
return false;
}
isRunning() {
return keys(this.groups).length > 0;
}
}
const BGT = new BackgroundTask();
export default BGT;
export function dispatchTask<T extends Task.Callable>(
groupName: string,
tasks: Task.Task<T>[],
comment?: string
) {
BGT.dispatch(groupName, tasks);
if (comment) {
store.dispatch(siteUpdateNotifier(comment));
}
}
|
