File class\textsanitizer\youtube\youtube.php

1:	<?php
2:
3:	/**
4:	* TextSanitizer extension
5:	*
6:	* You may not change or alter any portion of this comment or credits
7:	* of supporting developers from this source code or any supporting source code
8:	* which is considered copyrighted (c) material of the original comment or credit authors.
9:	* This program is distributed in the hope that it will be useful,
10:	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11:	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12:	*
13:	* @copyright (c) 2000-2021 XOOPS Project (www.xoops.org)
14:	* @license GNU GPL 2 (https://www.gnu.org/licenses/gpl-2.0.html)
15:	* @package class
16:	* @subpackage textsanitizer
17:	* @since 2.3.0
18:	* @author Taiwen Jiang <phppp@users.sourceforge.net>
19:	*/
20:	class MytsYoutube extends MyTextSanitizerExtension
21:	{
22:	/**
23:	* @param $textarea_id
24:	*
25:	* @return array
26:	*/
27:	public function encode($textarea_id)
28:	{
29:	// $config = parent::loadConfig(__DIR__);
30:	$code = "<button type='button' class='btn btn-default btn-sm' onclick='xoopsCodeYoutube(\"{$textarea_id}\",\""
31:	. htmlspecialchars(_XOOPS_FORM_ENTERYOUTUBEURL, ENT_QUOTES) . "\",\""
32:	. htmlspecialchars(_XOOPS_FORM_ALT_ENTERHEIGHT, ENT_QUOTES) . "\",\""
33:	. htmlspecialchars(_XOOPS_FORM_ALT_ENTERWIDTH, ENT_QUOTES)
34:	. "\");' onmouseover='style.cursor=\"hand\"' title='" . _XOOPS_FORM_ALTYOUTUBE
35:	. "'><span class='fa fa-fw fa-youtube' aria-hidden='true'></span></button>";
36:	$javascript = <<<EOH
37:	function xoopsCodeYoutube(id, enterYouTubePhrase, enterYouTubeHeightPhrase, enterYouTubeWidthPhrase)
38:	{
39:	var selection = xoopsGetSelect(id);
40:	if (selection.length > 0) {
41:	var text = selection;
42:	} else {
43:	var text = prompt(enterYouTubePhrase, "");
44:	if (text === null) {
45:	text = '';
46:	}
47:	}
48:	var domobj = xoopsGetElementById(id);
49:	if (text.length > 0) {
50:	var text2 = prompt(enterYouTubeWidthPhrase, "16x9");
51:	var text3 = prompt(enterYouTubeHeightPhrase, "");
52:	var result = "[youtube="+text2+","+text3+"]" + text + "[/youtube]";
53:	xoopsInsertText(domobj, result);
54:	}
55:	domobj.focus();
56:	}
57:	EOH;
58:
59:	return array($code, $javascript);
60:	}
61:
62:	/**
63:	* @param $match
64:	*
65:	* @return string
66:	*/
67:	public static function myCallback($match)
68:	{
69:	return self::decode($match[4], $match[2], $match[3]);
70:	}
71:
72:	/**
73:	* @param MyTextSanitizer $myts
74:	*/
75:	public function load(MyTextSanitizer $myts)
76:	{
77:	$myts->callbackPatterns[] = "/\[youtube=(['\"]?)([^\"']),([^\"'])\\1]([^\"]*)\[\/youtube\]/sU";
78:	$myts->callbacks[] = __CLASS__ . '::myCallback';
79:	}
80:
81:	/**
82:	* @param $url
83:	* @param $width
84:	* @param $height
85:	*
86:	* @return string
87:	*/
88:	public static function decode($url, $width, $height)
89:	{
90:	// modernized responsive YouTube handling suggested by XOOPS user xd9527 -- thanks!
91:	// https://xoops.org/modules/newbb/viewtopic.php?post_id=359913
92:
93:	// match known youtube urls
94:	// from: https://stackoverflow.com/questions/2936467/parse-youtube-video-id-using-preg-match/6382259#6382259
95:	$youtubeRegex = '%(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/\|(?:v\|e(?:mbed)?)/\|.*[?&]v=)\|youtu\.be/)'
96:	.'([^"&?/ ]{11})%i';
97:
98:	if (preg_match($youtubeRegex, $url, $match)) {
99:	$videoId = $match[1]; // extract just the video id from a URL
100:	} elseif (preg_match('%^[^"&?/ ]{11}$%', $url)) {
101:	$videoId = $url; // have a bare video id
102:	} else {
103:	trigger_error("Not matched: {$url} {$width} {$height}", E_USER_WARNING);
104:	return '';
105:	}
106:
107:	$width = empty($width) ? 426 : (int) $width;
108:	switch ($width) {
109:	case 4:
110:	$height = 3;
111:	break;
112:	case 16:
113:	$height = 9;
114:	break;
115:	default:
116:	$height = empty($height) ? 240 : (int) $height;
117:	break;
118:	}
119:
120:	$aspectRatio = $width/$height; // 16x9 = 1.777777778, 4x3 = 1.333333333
121:	$responsiveAspect = ($aspectRatio < 1.4) ? 'embed-responsive-4by3' : 'embed-responsive-16by9';
122:	if ($width < 17 && $height < 10) {
123:	$scale = (int) 450 / $width;
124:	$width = $width * $scale;
125:	$height = $height * $scale;
126:	}
127:
128:	$template = <<<'EOD'
129:	<div class="embed-responsive %4$s">
130:	<iframe class="embed-responsive-item" width="%2$d" height="%3$d" src="https://www.youtube.com/embed/%1$s" frameborder="0" allowfullscreen></iframe>
131:	</div>
132:	EOD;
133:
134:	$code = sprintf($template, $videoId, $width, $height, $responsiveAspect);
135:	return $code;
136:	}
137:	}
138:

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