owncast/web/utils/validators.ts

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// to use with <input type="url"> fields, as the default pattern only checks for `:`,
export const DEFAULT_TEXTFIELD_URL_PATTERN = 'https?://.*';
/**
* Determines if a URL is valid
* @param {string} url - A URL to validate.
* @param {string[]} validProtocols - An array of valid protocols. Defaults to web.
* @returns {boolean} - True if the URI is valid, false otherwise.
*/
export function isValidUrl(url: string, validProtocols: string[] = ['http:', 'https:']): boolean {
try {
const validationObject = new URL(url);
if (
validationObject.protocol === '' ||
validationObject.hostname === '' ||
!validProtocols.includes(validationObject.protocol)
) {
return false;
}
} catch (e) {
return false;
}
return true;
}
/**
* Determines if an account is valid by checking for a protocol, username
* and server, delimited by a colon. For example: @username:example.com
* @param {string} account - An account to validate.
* @param {string} protocol - The protocol we expect the account to be using.
* @returns {boolean} - True if the account is valid, false otherwise.
*/
export function isValidAccount(account: string, protocol: string): boolean {
if (account.startsWith('@')) {
// eslint-disable-next-line no-param-reassign
account = account.slice(1);
}
const components = account.split(/:|@/);
const [service, user, host] = components;
if (service !== protocol) {
return false;
}
if (components.length !== 3 || !service || !user || !host) {
return false;
}
return true;
}
/**
* Determines if an account is valid by simply checking for a protocol, username
* and server, delimited by a colon. For example: @username:example.com
* @param {string} account - An account to validate. Example: @me:matrix.org
* @returns {boolean} - True if the account is valid, false otherwise.
*/
export function isValidMatrixAccount(account: string): boolean {
if (account.startsWith('matrix:')) {
// eslint-disable-next-line no-param-reassign
account = account.slice(7);
}
if (account.startsWith('@')) {
// eslint-disable-next-line no-param-reassign
account = account.slice(1);
}
const components = account.split(':');
const [user, host] = components;
if (components.length !== 2 || !user || !host) {
return false;
}
return true;
}
/**
* Determines if a fediverse account is valid.
* For example: @username@example.com
* @param {string} account - An account to validate.
* @returns {boolean} - True if the account is valid, false otherwise.
*/
export function isValidFediverseAccount(account: string): boolean {
const sanitized = account.replace(/^@+/, '');
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const regex =
/^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return regex.test(String(sanitized).toLowerCase());
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}