455 lines
13 KiB
JavaScript
455 lines
13 KiB
JavaScript
/**
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* BetterDiscord Utils Module
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* Copyright (c) 2015-present Jiiks/JsSucks - https://github.com/Jiiks / https://github.com/JsSucks
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* All rights reserved.
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* https://betterdiscord.net
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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import fs from 'fs';
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import _ from 'lodash';
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import filetype from 'file-type';
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export class Utils {
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static overload(fn, cb) {
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const orig = fn;
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return function (...args) {
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orig(...args);
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cb(...args);
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}
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}
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/**
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* Attempts to parse a string as JSON.
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* @param {String} json The string to parse
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* @return {Any}
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*/
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static async tryParseJson(jsonString) {
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try {
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return JSON.parse(jsonString);
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} catch (err) {
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throw ({
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message: 'Failed to parse json',
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err
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});
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}
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}
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/**
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* Returns a new object with normalised keys.
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* @param {Object} object
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* @return {Object}
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*/
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static toCamelCase(o) {
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const camelCased = {};
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_.forEach(o, (value, key) => {
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if (_.isPlainObject(value) || _.isArray(value)) {
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value = this.toCamelCase(value);
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}
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camelCased[_.camelCase(key)] = value;
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});
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return camelCased;
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}
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/**
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* Checks if two or more values contain the same data.
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* @param {Any} ...value The value to compare
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* @return {Boolean}
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*/
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static compare(value1, value2, ...values) {
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// Check to see if value1 and value2 contain the same data
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if (typeof value1 !== typeof value2) return false;
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if (value1 === null && value2 === null) return true;
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if (value1 === null || value2 === null) return false;
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if (typeof value1 === 'object') {
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// Loop through the object and check if everything's the same
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if (Object.keys(value1).length !== Object.keys(value2).length) return false;
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for (let key in value1) {
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if (!this.compare(value1[key], value2[key])) return false;
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}
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} else if (value1 !== value2) return false;
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// value1 and value2 contain the same data
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// Check any more values
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for (let value3 of values) {
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if (!this.compare(value1, value3))
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return false;
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}
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return true;
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}
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/**
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* Clones an object and all it's properties.
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* @param {Any} value The value to clone
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* @param {Function} exclude A function to filter objects that shouldn't be cloned
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* @return {Any} The cloned value
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*/
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static deepclone(value, exclude) {
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if (exclude && exclude(value)) return value;
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if (typeof value === 'object') {
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if (value instanceof Array) return value.map(i => this.deepclone(i, exclude));
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const clone = Object.assign({}, value);
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for (let key in clone) {
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clone[key] = this.deepclone(clone[key], exclude);
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}
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return clone;
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}
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return value;
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}
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/**
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* Freezes an object and all it's properties.
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* @param {Any} object The object to freeze
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* @param {Function} exclude A function to filter objects that shouldn't be frozen
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*/
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static deepfreeze(object, exclude) {
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if (exclude && exclude(object)) return;
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if (typeof object === 'object' && object !== null) {
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const properties = Object.getOwnPropertyNames(object);
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for (let property of properties) {
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this.deepfreeze(object[property], exclude);
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}
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Object.freeze(object);
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}
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return object;
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}
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/**
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* Removes an item from an array. This differs from Array.prototype.filter as it mutates the original array instead of creating a new one.
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* @param {Array} array The array to filter
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* @param {Any} item The item to remove from the array
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* @return {Array}
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*/
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static removeFromArray(array, item) {
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let index;
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while ((index = array.indexOf(item)) > -1)
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array.splice(index, 1);
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return array;
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}
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/**
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* Defines a property with a getter that can be changed like a normal property.
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* @param {Object} object The object to define a property on
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* @param {String} property The property to define
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* @param {Function} getter The property's getter
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* @return {Object}
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*/
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static defineSoftGetter(object, property, get) {
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return Object.defineProperty(object, property, {
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get,
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set: value => Object.defineProperty(object, property, {
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value,
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writable: true,
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configurable: true,
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enumerable: true
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}),
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configurable: true,
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enumerable: true
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});
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}
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static wait(time = 0) {
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return new Promise(resolve => setTimeout(resolve, time));
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}
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static async until(check, time = 0) {
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let value, i;
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do {
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// Wait for the next tick
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await new Promise(resolve => setTimeout(resolve, time));
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value = check(i);
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i++;
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} while (!value);
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return value;
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}
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/**
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* Finds the index of array of bytes in another array
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* @param {Array} haystack The array to find aob in
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* @param {Array} needle The aob to find
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* @return {Number} aob index, -1 if not found
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*/
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static aobscan(haystack, needle) {
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for (let h = 0; h < haystack.length - needle.length + 1; ++h) {
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let found = true;
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for (let n = 0; n < needle.length; ++n) {
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if (needle[n] === null ||
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needle[n] === '??' ||
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haystack[h + n] === needle[n]) continue;
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found = false;
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break;
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}
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if (found) return h;
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}
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return -1;
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}
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/**
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* Convert buffer to base64 encoded string
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* @param {any} buffer buffer to convert
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* @returns {String} base64 encoded string from buffer
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*/
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static arrayBufferToBase64(buffer) {
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let binary = '';
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const bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);
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for (let i = 0; i < bytes.byteLength; i++) {
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binary += String.fromCharCode(bytes[i]);
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}
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return window.btoa(binary);
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}
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static async getImageFromBuffer(buffer) {
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if (!(buffer instanceof Blob)) buffer = new Blob([buffer]);
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const reader = new FileReader();
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reader.readAsDataURL(buffer);
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await new Promise(r => {
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reader.onload = r
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});
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const img = new Image();
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img.src = reader.result;
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return await new Promise(resolve => {
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img.onload = () => {
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resolve(img);
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}
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});
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}
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static async canvasToArrayBuffer(canvas, mime = 'image/png') {
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const reader = new FileReader();
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return new Promise(resolve => {
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canvas.toBlob(blob => {
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reader.addEventListener('loadend', () => {
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resolve(reader.result);
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});
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reader.readAsArrayBuffer(blob);
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}, mime);
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});
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}
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}
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export class FileUtils {
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/**
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* Gets information about a file.
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* @param {String} path The file's path
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* @return {Promise}
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*/
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static async stat(path) {
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return new Promise((resolve, reject) => {
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fs.stat(path, (err, stat) => {
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if (err) return reject({
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message: `No such file or directory: ${err.path}`,
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err
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});
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resolve(stat);
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});
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});
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}
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/**
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* Checks if a file exists and is a file.
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* @param {String} path The file's path
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* @return {Promise}
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*/
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static async fileExists(path) {
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const stats = await this.stat(path);
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if (!stats.isFile()) throw {
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message: `Not a file: ${path}`,
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stats
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};
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}
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/**
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* Checks if a directory exists and is a directory.
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* @param {String} path The directory's path
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* @return {Promise}
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*/
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static async directoryExists(path) {
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const stats = await this.stat(path);
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if (!stats.isDirectory()) throw {
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message: `Not a directory: ${path}`,
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stats
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};
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}
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/**
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* Creates a directory.
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* @param {String} path The directory's path
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* @return {Promise}
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*/
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static async createDirectory(path) {
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return new Promise((resolve, reject) => {
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fs.mkdir(path, err => {
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if (err) reject(err);
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else resolve();
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});
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});
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}
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/**
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* Checks if a directory exists and creates it if it doesn't.
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* @param {String} path The directory's path
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* @return {Promise}
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*/
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static async ensureDirectory(path) {
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try {
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await this.directoryExists(path);
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return true;
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} catch (err) {
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await this.createDirectory(path);
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return true;
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}
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}
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/**
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* Returns the contents of a file.
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* @param {String} path The file's path
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* @return {Promise}
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*/
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static async readFile(path) {
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await this.fileExists(path);
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return new Promise((resolve, reject) => {
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fs.readFile(path, 'utf-8', (err, data) => {
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if (err) return reject({
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message: `Could not read file: ${path}`,
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err
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});
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resolve(data);
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});
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});
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}
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/**
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* Returns the contents of a file.
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* @param {String} path The file's path
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* @param {Object} options Additional options to pass to fs.readFile
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* @return {Promise}
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*/
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static async readFileBuffer(path, options) {
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await this.fileExists(path);
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return new Promise((resolve, reject) => {
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fs.readFile(path, options || {}, (err, data) => {
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if (err) reject(err);
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else resolve(data);
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});
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});
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}
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/**
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* Writes to a file.
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* @param {String} path The file's path
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* @param {String} data The file's new contents
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* @return {Promise}
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*/
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static async writeFile(path, data) {
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return new Promise((resolve, reject) => {
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fs.writeFile(path, data, err => {
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if (err) reject(err);
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else resolve();
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});
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});
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}
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/**
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* Writes to the end of a file.
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* @param {String} path The file's path
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* @param {String} data The data to append to the file
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* @return {Promise}
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*/
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static async appendToFile(path, data) {
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return new Promise((resolve, reject) => {
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fs.appendFile(path, data, err => {
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if (err) reject(err);
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else resolve();
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});
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});
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}
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/**
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* Returns the contents of a file parsed as JSON.
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* @param {String} path The file's path
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* @return {Promise}
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*/
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static async readJsonFromFile(path) {
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const readFile = await this.readFile(path);
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try {
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return await Utils.tryParseJson(readFile);
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} catch (err) {
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throw Object.assign(err, { path });
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}
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}
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/**
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* Writes to a file as JSON.
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* @param {String} path The file's path
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* @param {Any} data The file's new contents
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* @param {Boolean} pretty Whether to pretty print the JSON object
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* @return {Promise}
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*/
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static async writeJsonToFile(path, json, pretty) {
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return this.writeFile(path, JSON.stringify(json, null, pretty ? 4 : 0) + '\n');
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}
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/**
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* Returns an array of items in a directory.
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* @param {String} path The directory's path
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* @return {Promise}
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*/
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static async listDirectory(path) {
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await this.directoryExists(path);
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return new Promise((resolve, reject) => {
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fs.readdir(path, (err, files) => {
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if (err) reject(err);
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else resolve(files);
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});
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});
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}
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static async readDir(path) {
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return this.listDirectory(path);
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}
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/**
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* Returns a file or buffer's MIME type and typical file extension.
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* @param {String|Buffer} buffer A buffer or the path of a file
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* @return {Promise}
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*/
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static async getFileType(buffer) {
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if (typeof buffer === 'string') buffer = await this.readFileBuffer(buffer);
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return filetype(buffer);
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}
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/**
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* Returns a file's contents as a data URI.
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* @param {String} path The directory's path
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* @return {Promise}
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*/
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static async toDataURI(buffer, type) {
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if (typeof buffer === 'string') buffer = await this.readFileBuffer(buffer);
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if (!type) type = (await this.getFileType(buffer)).mime;
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return `data:${type};base64,${buffer.toString('base64')}`;
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}
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}
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