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Utils.ts
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153 lines (131 loc) · 3.69 KB
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import { Chance } from 'chance';
import { JSFuck } from './enums/JSFuck';
export class Utils {
/**
* @type {RegExp}
*/
private static hexRepetitiveZerosRegExp: RegExp = new RegExp('^(0{2,})+(?!$)', '');
/**
* @type {Chance.Chance}
*/
private static randomGenerator: Chance.Chance = new Chance();
/**
* @param array
* @param searchElement
* @returns {boolean}
*/
public static arrayContains (array: any[], searchElement: any): boolean {
return array.indexOf(searchElement) >= 0;
}
/**
* @param array
* @param times
* @returns {T[]}
*/
public static arrayRotate <T> (array: T[], times: number): T[] {
if (!array.length) {
throw new ReferenceError(`Cannot rotate empty array.`);
}
if (times <= 0) {
return array;
}
let newArray: T[] = array,
temp: T | undefined;
while (times--) {
temp = newArray.pop()!;
newArray.unshift(temp);
}
return newArray;
}
/**
* @param string
* @param encode
*/
public static btoa (string: string, encode: boolean = true): string {
return new Buffer(
encode ? encodeURI(string) : string
).toString('base64');
}
/**
* @param dec
* @returns {string}
*/
public static decToHex (dec: number): string {
const decToHexSliceValue: number = -6,
exponent: number = 6,
radix: number = 16;
return (dec + Math.pow(radix, exponent))
.toString(radix)
.substr(decToHexSliceValue)
.replace(Utils.hexRepetitiveZerosRegExp, '');
}
/**
* @returns {Chance.Chance}
*/
public static getRandomGenerator (): Chance.Chance {
return Utils.randomGenerator;
}
/**
* @param length
* @returns any
*/
public static getRandomVariableName (length: number = 6): string {
const rangeMinInteger: number = 10000,
rangeMaxInteger: number = 99999999,
prefix: string = '_0x';
return `${prefix}${(
Utils.decToHex(
Utils.getRandomGenerator().integer({
min: rangeMinInteger,
max: rangeMaxInteger
})
)
).substr(0, length)}`;
}
/**
* @param number
* @returns {boolean}
*/
public static isInteger (number: number): boolean {
return number % 1 === 0;
}
/**
* @param obj
* @returns {T}
*/
public static strEnumify <T extends {[prop: string]: ''|string}> (obj: T): T {
return obj;
}
/**
* @param string
* @returns {string}
*/
public static stringToJSFuck (string: string): string {
return Array
.from(string)
.map((character: string): string => {
return JSFuck[character] || character;
})
.join(' + ');
}
/**
* @param string
* @returns {string}
*/
public static stringToUnicode (string: string): string {
const radix: number = 16;
let prefix: string,
regexp: RegExp = new RegExp('[\x00-\x7F]'),
template: string;
return `'${string.replace(/[\s\S]/g, (escape: string): string => {
if (regexp.test(escape)) {
prefix = '\\x';
template = '0'.repeat(2);
} else {
prefix = '\\u';
template = '0'.repeat(4);
}
return `${prefix}${(template + escape.charCodeAt(0).toString(radix)).slice(-template.length)}`;
})}'`;
}
}