/**
* @file Provides all supported YouTube URL formats, including standard URL,
* shortened URL, channel URL, and playlist URL.
*
* YouTube URLs typically follow a few formats:
* 1. **Standard Video URL:** `https://www.youtube.com/watch?v=VIDEO_ID`
* 2. **Shortened URLv** `https://youtu.be/VIDEO_ID`
* 3. **Playlist URL:** `https://www.youtube.com/playlist?list=PLAYLIST_ID`
* 4. **Channel URL:** `https://www.youtube.com/channel/CHANNEL_ID`
* 5. **YouTube Music URL:** `https://music.youtube.com/watch?v=VIDEO_ID`
*
* These formats allow the library to navigate directly to specific videos, playlists,
* or channels on YouTube.
*
* Additionally, this module also provides the YouTube Music URL pattern.
* This allows the library to handle a broader range of YouTube-related URLs
* effectively.
*
* @module yt-urlfmt
* @author Ryuu Mitsuki (https://github.com/mitsuki31)
* @license MIT
* @since 1.0.0
*/
'use strict';
/**
* An object contains regular expressions for matching various YouTube URL formats.
*
* @public
* @constant
* @property {RegExp} STANDARD
* Regular expression for matching YouTube standard video URLs of the form(s):
* <ul>
* <li>`https://youtube.com/watch?v=VIDEO_ID`</li>
* <li>`https://www.youtube.com/watch?v=VIDEO_ID`</li>
* </ul>
* @property {RegExp} SHORTENED
* Regular expression for matching YouTube shortened video URLs of the form(s):
* <ul>
* <li>`https://youtu.be/VIDEO_ID`</li>
* </ul>
* @property {RegExp} VIDEO
* Regular expression for matching combined YouTube video URLs (standard
* and shortened formats).
* @property {RegExp} CHANNEL
* Regular expression for matching YouTube channel URLs of the form(s):
* <ul>
* <li>`https://youtube.com/channel/CHANNEL_ID`</li>
* <li>`https://www.youtube.com/channel/CHANNEL_ID`</li>
* </li>
* @property {RegExp} PLAYLIST
* Regular expression for matching YouTube playlist URLs of the form(s):
* <ul>
* <li>`https://youtube.com/playlist?list=PLAYLIST_ID`</li>
* <li>`https://www.youtube.com/playlist?list=PLAYLIST_ID`</li>
* </ul>
* @property {RegExp} MUSIC
* Regular expression for matching YouTube Music URLs of the form(s):
* <ul>
* <li>`https://music.youtube.com/watch?v=VIDEO_ID`</li>
* <li>`https://music.youtube.com/playlist?list=PLAYLIST_ID`</li>
* </ul>
* @since 1.0.0
*/
const YT_URLFORMAT = Object.freeze({
STANDARD: /^https?:\/\/(?:(www|m)\.)?youtube\.com\/watch\?v=[a-zA-Z0-9_=-]+/,
SHORTENED: /^https?:\/\/youtu\.be\/[a-zA-Z0-9_=-]+/,
VIDEO: /^https?:\/\/((?:(www|m)\.)?youtube\.com\/watch\?v=|youtu\.be\/)[a-zA-Z0-9_=-]+/,
CHANNEL: /^https?:\/\/(?:(www|m)\.)?youtube\.com\/channel\/[a-zA-Z0-9_=-]+/,
PLAYLIST: /^https?:\/\/(?:(www|m)\.)?youtube\.com\/playlist\?list=[a-zA-Z0-9_=-]+/,
MUSIC: /^https?:\/\/music\.youtube\.com\/(?:watch\?v=|playlist\?list=)[a-zA-Z0-9_=-]+/
});
module.exports = YT_URLFORMAT;