You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
2.6 KiB
TypeScript
74 lines
2.6 KiB
TypeScript
import ByteBuffer from 'bytebuffer';
|
|
import { MAX_NAME_LENGTH_BYTES } from '../constants';
|
|
|
|
export type Encoding = 'base64' | 'hex' | 'binary' | 'utf8';
|
|
export type BufferType = ByteBuffer | Buffer | ArrayBuffer | Uint8Array;
|
|
|
|
/**
|
|
* Take a string value with the given encoding and converts it to an `ArrayBuffer`.
|
|
* @param value The string value.
|
|
* @param encoding The encoding of the string value.
|
|
*/
|
|
export function encode(value: string, encoding: Encoding): ArrayBuffer {
|
|
return ByteBuffer.wrap(value, encoding).toArrayBuffer();
|
|
}
|
|
|
|
/**
|
|
* Take a buffer and convert it to a string with the given encoding.
|
|
* @param buffer The buffer.
|
|
* @param stringEncoding The encoding of the converted string value.
|
|
*/
|
|
export function decode(buffer: BufferType, stringEncoding: Encoding): string {
|
|
return ByteBuffer.wrap(buffer).toString(stringEncoding);
|
|
}
|
|
|
|
export const toHex = (d: BufferType) => decode(d, 'hex');
|
|
export const fromHex = (d: string) => encode(d, 'hex');
|
|
|
|
export const fromHexToArray = (d: string) => new Uint8Array(fromHex(d));
|
|
|
|
export const fromBase64ToArrayBuffer = (d: string) => encode(d, 'base64');
|
|
export const fromBase64ToArray = (d: string) => new Uint8Array(fromBase64ToArrayBuffer(d));
|
|
|
|
export const fromArrayBufferToBase64 = (d: BufferType) => decode(d, 'base64');
|
|
export const fromUInt8ArrayToBase64 = (d: Uint8Array) => decode(d, 'base64');
|
|
|
|
export const stringToArrayBuffer = (str: string): ArrayBuffer => {
|
|
if (typeof str !== 'string') {
|
|
throw new TypeError("'string' must be a string");
|
|
}
|
|
|
|
return encode(str, 'binary');
|
|
};
|
|
|
|
export const stringToUint8Array = (str?: string): Uint8Array => {
|
|
if (!str) {
|
|
return new Uint8Array();
|
|
}
|
|
return new Uint8Array(stringToArrayBuffer(str));
|
|
};
|
|
|
|
// Regex to match all characters which are forbidden in display names
|
|
const forbiddenDisplayCharRegex = /\uFFD2*/g;
|
|
|
|
/**
|
|
*
|
|
* This function removes any forbidden char from a given display name.
|
|
* This does not trim it as otherwise, a user cannot type User A as when he hits the space, it gets trimmed right away.
|
|
* The trimming should hence happen after calling this and on saving the display name.
|
|
*
|
|
* This function makes sure that the MAX_NAME_LENGTH_BYTES is verified for utf8 byte length.
|
|
* @param inputName the input to sanitize
|
|
* @returns a sanitized string, untrimmed
|
|
*/
|
|
export const sanitizeSessionUsername = (inputName: string) => {
|
|
const validChars = inputName.replace(forbiddenDisplayCharRegex, '');
|
|
|
|
const lengthBytes = encode(validChars, 'utf8').byteLength;
|
|
if (lengthBytes > MAX_NAME_LENGTH_BYTES) {
|
|
throw new Error('Display name is too long');
|
|
}
|
|
|
|
return validChars;
|
|
};
|