tweetcards.php
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<?php
/**
* Content Plugin for Joomla! - Tweet Cards
*
* @author JoomlaTemplat.es <htmgarcia@gmail.com>
* @copyright Copyright 2016 JoomlaTemplat.es
* @license GNU Public License version 3 or later
* @link https://joomlatemplat.es/extensions/tweet-cards
*/
defined('_JEXEC') or die;
jimport('joomla.plugin.plugin');
/**
* Class PlgContentTweetcards
*
* @since 0.0.1
*/
class PlgContentTweetcards extends JPlugin
{
/**
* Event method onContentBeforeDisplay
*
* @param string $context The context of the content being passed to the plugin
* @param mixed &$row An object with a "text" property
* @param mixed &$params Additional parameters
* @param int $page Optional page number
*
* @return null
*
* @since 0.0.1
*/
public function onContentBeforeDisplay($context, &$row, &$params, $page = 0)
{
$twitteraccount = $this->params->get('twitteraccount', '@htmgarcia');
$type = $this->params->get('type', 'summary');
// カテゴリページも追加
if ($context == 'com_content.article' || $context == 'com_content.category') {
$this->setMetadata (
$this->setMetatitle(
$row->metadata,
$row->title == 'home' ? '鹿屋体育大学 - ホーム｜鹿屋体育大学' : '鹿屋体育大学 - ' . $row->title . '｜鹿屋体育大学'
),
$this->setImage(
$row->images,
$row->text
),
$this->setMetadesc(
$row->metadesc,
$row->title == 'home' ? '' : $row->text
),
$twitteraccount,
$type
);
}
}
/**
* Event method that create the open graph meta tags
*
* @param string $title The article's title
*
* @since 0.0.1
*/
protected function setMetadata ($title, $image, $metadesc, $twitteraccount, $type) {
$doc = JFactory::getDocument();
$doc->setMetaData( 'twitter:card', $type );
$doc->setMetaData( 'twitter:site', $twitteraccount );
$doc->setMetaData( 'twitter:title', $title );
$doc->setMetaData( 'twitter:description', $metadesc );
$doc->setMetaData( 'twitter:image', $image );
}
/**
* Extract article's image
*
* @return string
*
* @since 0.0.1
*/
protected function setImage($images, $text) {
$fullImage = json_decode($images);
preg_match_all('|<img.*?src=[\'"](.*?)[\'"].*?>|i', $text, $matches);
if ( !empty($fullImage->image_fulltext) ) {
$image = JURI::base() . $fullImage->image_fulltext;
// 本文中の画像の自動選択をOFF
// } elseif( !empty($matches[ 1 ][ 0 ]) ) {
// $image = $matches[ 1 ][ 0 ];
// $image = str_replace(JURI::base(), '', $image);
// $image = JURI::base() . $image;
} else {
$image = '';
}
return $image;
}
/**
* Extract article's meta description
*
* @return string
*
* @since 0.0.1
*/
protected function setMetadesc($metadesc, $text) {
if($metadesc) {
$metadesc = $metadesc;
} else {
$metadesc = substr( strip_tags($text), 0, 157 ) . '...';
}
return $metadesc;
}
/**
* Extract article's meta title
*
* @return string
*
* @since 0.0.1
*/
protected function setMetatitle($metadata, $title) {
$metadata = json_decode($metadata);
if( !empty($metadata->metatitle) ) {
$metatitle = $metadata->metatitle;
} else {
$metatitle = htmlspecialchars($title);
}
return $metatitle;
}
}