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/**
* Escapes a string to AO1 escape codes.
* @param {string} estring the string to be escaped
*/
export function escapeChat(estring) {
return estring
.replace(/#/g, '<num>')
.replace(/&/g, '<and>')
.replace(/%/g, '<percent>')
.replace(/\$/g, '<dollar>');
}
/**
* Unescapes a string to AO1 escape codes.
* @param {string} estring the string to be unescaped
*/
export function unescapeChat(estring) {
return estring
.replace(/<num>/g, '#')
.replace(/<and>/g, '&')
.replace(/<percent>/g, '%')
.replace(/<dollar>/g, '$');
}
/**
* Escapes a string to be HTML-safe.
*
* XXX: This is unnecessary if we use `createTextNode` instead!
* @param {string} unsafe an unsanitized string
*/
export function safe_tags(unsafe) {
if (unsafe) {
return unsafe
.replace(/>/g, '>')
.replace(/</g, '<');
}
return '';
}
/**
* Encode text on client side.
* @param {string} estring the string to be encoded
*/
export function encodeChat(estring) {
const selectedEncoding = document.getElementById('client_encoding').value;
if (selectedEncoding === 'unicode') {
// This approach works by escaping all special characters to Unicode escape sequences.
// Source: https://gist.github.com/mathiasbynens/1243213
return estring.replace(/[^\0-~]/g, (ch) => `\\u${(`000${ch.charCodeAt().toString(16)}`).slice(-4)}`);
} if (selectedEncoding === 'utf16') {
// Source: https://developers.google.com/web/updates/2012/06/How-to-convert-ArrayBuffer-to-and-from-String
const buffer = new ArrayBuffer(estring.length * 2);
const result = new Uint16Array(buffer);
for (let i = 0, strLen = estring.length; i < strLen; i++) {
result[i] = estring.charCodeAt(i);
}
return String(result);
}
return estring;
}
/**
* Decodes text on client side.
* @param {string} estring the string to be decoded
*/
export function decodeChat(estring) {
const selectedDecoding = document.getElementById('client_decoding').value;
if (selectedDecoding === 'unicode') {
// Source: https://stackoverflow.com/questions/7885096/how-do-i-decode-a-string-with-escaped-unicode
return estring.replace(/\\u([\d\w]{1,})/gi, (match, group) => String.fromCharCode(parseInt(group, 16)));
} if (selectedDecoding === 'utf16') {
// Source: https://developers.google.com/web/updates/2012/06/How-to-convert-ArrayBuffer-to-and-from-String
return String.fromCharCode.apply(null, new Uint16Array(estring.split(',')));
}
return estring;
}
/**
* XXX: a nasty hack made by gameboyprinter.
* @param {string} msg chat message to prepare for display
*/
export function prepChat(msg) {
// TODO: make this less awful
return unescapeChat(decodeChat(msg));
}
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