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261 | 1x
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83811x
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5031x
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528141x
| import { Chance } from 'chance';
import { JSFuck } from './enums/JSFuck';
export class Utils {
/**
* @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
*/
public static btoa (string: string): string {
const chars: string = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
let output: string = '';
string = encodeURIComponent(string).replace(/%([0-9A-F]{2})/g, (match, p1) => {
return String.fromCharCode(parseInt('0x' + p1));
});
for (
let block: number|undefined, charCode: number, idx: number = 0, map: string = chars;
string.charAt(idx | 0) || (map = '=', idx % 1);
output += map.charAt(63 & block >> 8 - idx % 1 * 8)
) {
charCode = string.charCodeAt(idx += 3/4);
Iif (charCode > 0xFF) {
throw new Error("'btoa' failed: The string to be encoded contains characters outside of the Latin1 range.");
}
block = block << 8 | charCode;
}
return output;
}
/**
* @param dec
* @returns {string}
*/
public static decToHex (dec: number): string {
const radix: number = 16;
return Number(dec).toString(radix);
}
/**
* @param url
* @returns {string}
*/
public static extractDomainFromUrl (url: string): string {
let domain: string;
if (url.indexOf('://') > -1 || url.indexOf('//') === 0) {
domain = url.split('/')[2];
} else {
domain = url.split('/')[0];
}
domain = domain.split(':')[0];
return domain;
}
/**
* @returns {Chance.Chance}
*/
public static getRandomGenerator (): Chance.Chance {
return Utils.randomGenerator;
}
/**
* @param length
* @returns {string}
*/
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 str
* @param length
* @returns {string[]}
*/
public static hideString(str: string, length: number): [string, string] {
const escapeRegExp: (s: string) => string = (s: string) =>
s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
const randomMerge: (s1: string, s2: string) => string = function (s1: string, s2: string): string {
let i1: number = -1,
i2: number = -1,
result: string = '';
while (i1 < s1.length || i2 < s2.length) {
if (Math.random() < 0.5 && i2 < s2.length) {
result += s2.charAt(++i2);
} else {
result += s1.charAt(++i1);
}
}
return result;
};
const customPool: string = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
let randomString: string = Utils.randomGenerator.string({length: length, pool: customPool}),
randomStringDiff: string = randomString.replace(
new RegExp('[' + escapeRegExp(str) + ']', 'g'),
''),
randomStringDiffArray: string[] = randomStringDiff.split('');
Utils.randomGenerator.shuffle(randomStringDiffArray);
randomStringDiff = randomStringDiffArray.join('');
return [randomMerge(str, randomStringDiff), randomStringDiff];
}
/**
* @param number
* @returns {boolean}
*/
public static isInteger (number: number): boolean {
return number % 1 === 0;
}
/**
* RC4 symmetric cipher encryption/decryption
* https://gist.github.com/farhadi/2185197
*
* @param key
* @param string
* @returns {string}
*/
public static rc4 (string: string, key: string) {
let s: number[] = [],
j: number = 0,
x: number,
result: string = '';
for (var i = 0; i < 256; i++) {
s[i] = i;
}
for (i = 0; i < 256; i++) {
j = (j + s[i] + key.charCodeAt(i % key.length)) % 256;
x = s[i];
s[i] = s[j];
s[j] = x;
}
i = 0;
j = 0;
for (let y = 0; y < string.length; y++) {
i = (i + 1) % 256;
j = (j + s[i]) % 256;
x = s[i];
s[i] = s[j];
s[j] = x;
result += String.fromCharCode(string.charCodeAt(y) ^ s[(s[i] + s[j]) % 256]);
}
return result;
}
/**
* @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 stringToUnicodeEscapeSequence (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)}`;
})}`;
}
}
|