<?php

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

function wikiplugin_youtube_info()
{
    return [
        'name' => tra('YouTube'),
        'documentation' => 'PluginYouTube',
        'description' => tra('Embed a YouTube video in a page'),
        'prefs' => [ 'wikiplugin_youtube' ],
        'iconname' => 'youtube',
        'introduced' => 2,
        'tags' => [ 'basic' ],
        'params' => [
            'movie' => [
                'required' => true,
                'name' => tra('Movie'),
                'description' => tr('Complete URL to the YouTube video or last part (after %0www.youtube.com/v/%1 and
                    before the first question mark)', '<code>', '</code>'),
                'since' => '2.0',
                'filter' => 'url',
                'default' => '',
            ],
            'privacyEnhanced' => [
                'required' => false,
                'name' => tra('Privacy-Enhanced'),
                'description' => tra('Enable privacy-enhanced mode'),
                'default' => '',
                'filter' => 'alpha',
                'options' => [
                    ['text' => '', 'value' => ''],
                    ['text' => tra('Yes'), 'value' => 'y'],
                    ['text' => tra('No'), 'value' => 'n'],
                ],
            ],
            'width' => [
                'required' => false,
                'name' => tra('Width'),
                'description' => tra('Width in pixels.') . ' ' . tra('Default') . ' :<code>425</code>',
                'since' => '2.0',
                'filter' => 'digits',
                'default' => 425,
            ],
            'height' => [
                'required' => false,
                'name' => tra('Height'),
                'description' => tra('Height in pixels') . ' ' . tra('Default') . ' :<code>350</code>',
                'since' => '2.0',
                'filter' => 'digits',
                'default' => 350,
            ],
            'start' => [
                'required' => false,
                'name' => tra('Start time'),
                'description' => tra('Start time offset in seconds'),
                'filter' => 'digits',
                'default' => 0,
            ],
            'quality' => [
                'required' => false,
                'name' => tra('Quality'),
                'description' => tr('Quality of the video. Default is %0high%1.', '<code>', '</code>'),
                'since' => '2.0',
                'default' => 'high',
                'filter' => 'alpha',
                'options' => [
                    ['text' => '', 'value' => ''],
                    ['text' => tra('High'), 'value' => 'high'],
                    ['text' => tra('Medium'), 'value' => 'medium'],
                    ['text' => tra('Low'), 'value' => 'low'],
                ],
                'advanced' => true
            ],
            'allowFullScreen' => [
                'required' => false,
                'name' => tra('Allow full-screen'),
                'description' => tra('Enlarge video to full screen size'),
                'since' => '5.0',
                'default' => '',
                'filter' => 'alpha',
                 'options' => [
                    ['text' => '', 'value' => ''],
                    ['text' => tra('Yes'), 'value' => 'y'],
                    ['text' => tra('No'), 'value' => 'n'],
                 ],
                 'advanced' => true
            ],
            'related' => [
                'required' => false,
                'name' => tra('Related'),
                'description' => tra('Show related videos (shown by default)'),
                'since' => '6.1',
                'default' => '',
                'filter' => 'alpha',
                'options' => [
                    ['text' => '', 'value' => ''],
                    ['text' => tra('Yes'), 'value' => 'y'],
                    ['text' => tra('No'), 'value' => 'n'],
                ],
                'advanced' => true
            ],
            'background' => [
                'required' => false,
                'name' => tra('Background'),
                'description' => tra('Toolbar background color. Use an HTML color code.') . ' ' . tra('Example')
                    . ': <code>ffffff</code>',
                'accepted' => tra('HTML color code, e.g. ffffff'),
                'since' => '6.1',
                'filter' => 'text',
                'default' => '',
                'advanced' => true
            ],
            'border' => [
                'required' => false,
                'name' => tra('Borders'),
                'description' => tra('Toolbar border colors. Use an HTML color code.') . ' ' . tra('Example')
                    . ': <code>ffffff</code>',
                'accepted' => tra('HTML color code, e.g. ffffff'),
                'since' => '6.1',
                'filter' => 'text',
                'default' => '',
                'advanced' => true
            ],
        ],
    ];
}

function wikiplugin_youtube($data, $params)
{
    global $tikilib;

     $plugininfo = wikiplugin_youtube_info();
    foreach ($plugininfo['params'] as $key => $param) {
        $default["$key"] = $param['default'];
    }
    $params = array_merge($default, $params);

    if (empty($params['movie'])) {
        return '^' . tra('Plugin YouTube error: the movie parameter is empty.');
    }

    $scheme = $tikilib->httpScheme();

    $sYoutubeId  = getYoutubeId($params['movie']);
    if (empty($sYoutubeId)) {
        Feedback::error(tra('Invalid YouTube URL provided'));
        return '';
    }

    if ($params['privacyEnhanced'] == 'y') {
        $fqdn = 'www.youtube-nocookie.com';
    } else {
        $fqdn = 'www.youtube.com';
    }

    $params['movie'] = '//' . $fqdn . '/embed/' . $sYoutubeId . '?';
    // backward compatibility
    if ($params['allowFullScreen'] == 'y') {
        $params['allowFullScreen'] = 'true';
    } elseif ($params['allowFullScreen'] == 'n') {
        $params['allowFullScreen'] = 'false';
    }

    if (! empty($params['allowFullScreen'])) {
        if ($params['allowFullScreen'] == 'true') {
            $params['movie'] .= '&fs=1';
        } else {
            $params['movie'] .= '&fs=0';
        }
    }
    if (! empty($params['start'])) {
        $params['movie'] .= '&start=' . $params['start'];
    }
    if (isset($params['related']) && $params['related'] == 'n') {
        $params['movie'] .= '&rel=0';
    }
    if (! empty($params['border'])) {
        $params['movie'] .= '&color1=0x' . $params['border'];
    }
    if (! empty($params['background'])) {
        $params['movie'] .= '&color2=0x' . $params['background'];
    }


    $iframe = ('<iframe src="' . $params['movie'] . '" frameborder="0" width="' . $params['width'] . '" height="' . $params['height'] . '" allowfullscreen="' . $params['allowFullScreen'] . '"></iframe>');

    return '~np~' . $iframe . '~/np~';
}

function getYoutubeId($sYoutubeUrl)
{
    $aParsedUrl = parse_url($sYoutubeUrl);
    if ($aParsedUrl !== false && ! empty($aParsedUrl['host'])) {
        if (
            $aParsedUrl['host'] !== 'youtube.com'
            && $aParsedUrl['host'] !== 'www.youtube.com'
            && $aParsedUrl['host'] !== 'youtu.be'
            && $aParsedUrl['host'] !== 'www.youtu.be'
        ) {
            return false;
        }
        if ($aParsedUrl['host'] === 'youtu.be') {
            $sYoutubeId = str_replace('/', '', $aParsedUrl['path']);
            return $sYoutubeId;
        }
        if ($aParsedUrl['host'] === 'youtube.com' || $aParsedUrl['host'] === 'www.youtube.com') {
            parse_str(parse_url($sYoutubeUrl, PHP_URL_QUERY), $aQueryString);
            return $aQueryString["v"];
        }
    } elseif (preg_match('/^([\w\-_]+)$/', $sYoutubeUrl, $matches)) {
        $sYoutubeId = $sYoutubeUrl;
    } else {
        return false;
    }
    return $sYoutubeId;
}