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Brazen Subscriptions Loader

Helper class for loading account subscriptions

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/424516/1114774/Brazen%20Subscriptions%20Loader.js 

// ==UserScript==
// @name         Brazen Subscriptions Loader
// @namespace    brazenvoid
// @version      1.0.1
// @author       brazenvoid
// @license      GPL-3.0-only
// @description  Helper class for loading account subscriptions
// ==/UserScript==

class BrazenSubscriptionsLoader
{
    /**
     * @callback SubscriptionLoaderGetPageCountCallback
     * @param {JQuery} page
     * @return {number}
     */

    /**
     * @callback SubscriptionLoaderGetPageUrlCallback
     * @param {string} baseUrl
     * @param {number} pageNo
     * @return {string}
     */

    /**
     * @callback SubscriptionLoaderProgressReportingCallback
     * @param {string} status
     */

    /**
     * @callback SubscriptionLoaderSubscriptionsGatheredCallback
     * @param {string[]} subscriptions
     */

    /**
     * @typedef {{url: string, getPageCount: SubscriptionLoaderGetPageCountCallback, getPageUrl: SubscriptionLoaderGetPageUrlCallback,
     *            subscriptionNameSelector: string, subscriptionsCountSelector: string}} SubscriptionLoaderConfig
     */

    /**
     * @param {SubscriptionLoaderProgressReportingCallback} onProgressUpdate
     * @param {SubscriptionLoaderSubscriptionsGatheredCallback} onSubscriptionsGathered
     */
    constructor (onProgressUpdate, onSubscriptionsGathered)
    {
        /**
         * @type {number}
         * @private
         */
        this._configIterator = 0

        /**
         * @type {SubscriptionLoaderConfig[]}
         * @private
         */
        this._configs = []

        /**
         * @type {SubscriptionLoaderProgressReportingCallback}
         * @private
         */
        this._onProgressUpdate = onProgressUpdate

        /**
         * @type {SubscriptionLoaderSubscriptionsGatheredCallback}
         * @private
         */
        this._onSubscriptionsGathered = onSubscriptionsGathered

        /**
         * @type {JQuery}
         * @private
         */
        this._sandbox = null

        /**
         * @type {SubscriptionLoaderConfig}
         * @private
         */
        this._selectedConfig = {}

        /**
         * @type {*[]}
         * @private
         */
        this._subscriptions = []
    }

    /**
     * Loads and records subscriptions by page
     * @param {number} maxPage
     * @param {number} pageNo
     * @private
     */
    _loadSubscriptionsPage (pageNo, maxPage)
    {
        this._sandbox.empty().load(this._selectedConfig.getPageUrl(this._selectedConfig.url, pageNo), () => {
            this._sandbox.find(this._selectedConfig.subscriptionNameSelector).each((index, element) => {
                this._subscriptions.push($(element).text().trim())
            })
            this._onProgressUpdate('Gathering subscriptions - ' + Math.ceil(((pageNo / maxPage) * 100)) + '% Complete')
            pageNo++
            if (pageNo <= maxPage) {
                this._loadSubscriptionsPage(pageNo, maxPage)
            } else {
                this._configIterator++
                if (this._configIterator < this._configs.length) {
                    this._processSubscriptions()
                } else {
                    this._sandbox.remove()
                    this._onProgressUpdate('Loaded ' + this._subscriptions.length + ' subscriptions.')
                    this._onSubscriptionsGathered(this._subscriptions)
                    this._configIterator = 0
                    this._subscriptions = []
                }
            }
        })
    }

    /**
     * @private
     */
    _processSubscriptions ()
    {
        this._selectedConfig = this._configs[this._configIterator]
        this._sandbox.empty().load(this._selectedConfig.url + ' ' + this._selectedConfig.subscriptionsCountSelector, () => {
            this._loadSubscriptionsPage(1, Math.ceil(this._selectedConfig.getPageCount(this._sandbox)))
        })
    }

    /**
     * @param {SubscriptionLoaderConfig} config
     * @returns {BrazenSubscriptionsLoader}
     */
    addConfig (config)
    {
        this._configs.push(config)
        return this
    }

    run ()
    {
        this._onProgressUpdate('Gathering subscriptions - 0% Complete')
        this._sandbox = $('<div id="brazen-subscriptions-loader-sandbox" hidden/>').appendTo('body')
        this._processSubscriptions()
    }
}