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Yinr-libs

Useful functions for yinr

Versão de: 06/02/2023. Veja: a última versão.

Este script não deve ser instalado diretamente. Este script é uma biblioteca de outros scripts para incluir com o diretório meta // @require https://update.greasyfork.org/scripts/458769/1146261/Yinr-libs.js 

// ==UserScript==
// @name               Yinr-libs
// @namespace          https://yinr.cc/
// @version            0.0.4
// @description        Useful functions for yinr
// @author             Yinr
// @license            GPL-v3
// ==/UserScript==

/**
 * Useful functions for yinr
 * ### 脚本常用功能库
 * 1. `YinrLibs.launchObserver`: 创建 DOM 监听
 * 2. `YinrLibs.sleep`: 等待延时
 * 3. `YinrLibs.generateTextFile`: 生成文本文件下载链接
 * ### 使用
 * ```
 * // @require https://greasyfork.org/scripts/458769-yinr-libs/code/Yinr-libs.js
 * ```
 * @module YinrLibs
 */
const YinrLibs = (function() {
    'use strict'

    return {
        /** 创建 DOM 监听
         * @param {Object} option
         * @param {(Element | string)} option.parentNode MutationObserver 绑定的 DOM 对象
         * @param {string} option.selector 需要监听变化的 selector
         * @param {voidCallback} [option.failCallback=callback] selector 不存在时执行的回调函数
         * @param {MutationCallback} [option.successCallback=null] selector 对象发生 Mutation 事件时执行的回调函数
         * @param {boolean} [option.stopWhenSuccess=true] 执行一次 `successCallback` 后立即解除监听
         * @param {MutationObserverInit} [option.config={childList: true, subtree: true}] MutationObserver 配置参数
         */
        launchObserver ({
            parentNode,
            selector,
            failCallback = null,
            successCallback = null,
            stopWhenSuccess = true,
            config = { childList: true, subtree: true }
        }) {
            if (!parentNode) return
            /** @type {MutationCallback} */
            const observeFunc = mutationList => {
                if (!document.querySelector(selector)) {
                    if (failCallback) failCallback()
                    return
                }
                if (stopWhenSuccess) observer.disconnect()

                mutationList.itemFilter = (fn, type = 'addedNodes') => mutationList.map(i => Array.from(i[type]).filter(fn)).reduce((arr, val) => arr.concat(val), [])

                if (successCallback) successCallback(mutationList)
            }
            const observer = new MutationObserver(observeFunc)
            observer.observe(parentNode, config)
        },

        /** 等待延时函数，默认固定延时 1s
         * @param {number} [timeoutMin=1000] 最少随机等待时间（ms）
         * @param {number} [timeoutMax=timeMin] 最多随机等待时间（ms）
         * @returns {Promise<true>}
         * @example
         * await sleep() // 默认等待 1s
         * await sleep(1000, 3000) // 随机等待 1-3s
         * sleep().then(() => { callbackFn() }) // 等待 1s 后执行 callbackFn()
         */
        sleep(timeoutMin = 1000, timeoutMax = timeoutMin) {
            return new Promise((resolve) => {
                const timeout = timeoutMin === timeoutMax ? timeoutMin : Math.floor(Math.random() * (timeoutMax - timeoutMin) + timeoutMin)
                setTimeout(() => { resolve(true) }, timeout);
            })
        },

        /** 创建文本文件，返回可下载文件链接
         * @param {string} text 文本文件内容文本
         * @param {string} [type='text/plain'] 文件 MIME 类型
         * @returns {string}
         * @example
         * // 生成 json 文件下载链接，并使用 GM_download 函数下载
         * let url = generateTextFile('{ "data": 1 }', 'application/json')
         * GM_download(url, 'data.json')
         */
        generateTextFile(text, type = 'text/plain') {
            const data = new Blob([text], { type })
            return URL.createObjectURL(data)
        }
    }
})();