eh-downloader/task.ts

import { DiscriminatedUnion } from "./utils.ts";

export enum TaskType {
    Download,
    ExportZip,
}

export type Task<T extends TaskType = TaskType> = {
    id: number;
    type: T;
    gid: number;
    token: string;
    pid: number;
    details: string | null;
};

export type TaskDownloadProgess = {
    downloaded_page: number;
    total_page: number;
};

export type TaskExportZipProgress = {
    added_page: number;
    total_page: number;
};

type TaskId<T extends Record<PropertyKey, unknown>> = {
    [P in keyof T]: ({
        task_id: number;
    } & T[P]) extends infer U ? { [Q in keyof U]: U[Q] } : never;
};

export type TaskProgressBasicType = {
    [TaskType.Download]: TaskDownloadProgess;
    [TaskType.ExportZip]: TaskExportZipProgress;
};

export type TaskProgressType = TaskId<TaskProgressBasicType>;

export type TaskProgress = DiscriminatedUnion<"type", TaskProgressType>;

export enum TaskStatus {
    Wait,
    Running,
    Finished,
}

export type TaskDetail<T extends TaskType = TaskType> = {
    base: Task<T>;
    progress?: TaskProgressBasicType[T];
    status: TaskStatus;
};