Opengraph and Twitter card now possible to select a default image, fixed regex on img abs

bl-kernel/functions.php

@@ -35,7 +35,7 @@ function buildPage($key) {
 	$contentRaw = $page->contentRaw();
 	$content = Text::pre2htmlentities($contentRaw); // Parse pre code with htmlentities
 	$content = $Parsedown->text($content); // Parse Markdown
-	$content = Text::imgRel2Abs($content, HTML_PATH_UPLOADS); // Parse img src relative to absolute.
+	$content = Text::imgRel2Abs($content, DOMAIN_UPLOADS); // Parse img src relative to absolute (with domain)
 	$page->setField('content', $content, true);
 
 	// Pagebrake

bl-kernel/helpers/text.class.php

@@ -220,8 +220,8 @@ class Text {
 
 	public static function imgRel2Abs($string, $base)
 	{
-		$pattern = "/<img([^>]*) src=\"([^http|https|ftp|\/\/][^\"]*)\"/";
+		$pattern = '/<img([^>]*)(src)=\"(?!https:)(?!http:)(?!\/\/)(.*?)\"(.*?)>/';
-		$replace = "<img\${1} src=\"".$base. "\${2}\"";
+		$replace = "<img\${1} src=\"".$base."\${3}\" \${4}>";
 
 		return preg_replace($pattern, $replace, $string);
 	}

bl-plugins/opengraph/plugin.php

@@ -2,25 +2,32 @@
 
 class pluginOpenGraph extends Plugin {
 
-	// Returns the first image from the HTML content
+	public function init()
-	private function getImage($content)
 	{
-		$dom = new DOMDocument();
+		// Fields and default values for the database of this plugin
-		$dom->loadHTML('<meta http-equiv="content-type" content="text/html; charset=utf-8">'.$content);
+		$this->dbFields = array(
-		$finder = new DomXPath($dom);
+			'defaultImage'=>''
+		);
+	}
 
-		$images = $finder->query("//img");
+	public function form()
+	{
+		global $Language;
 
-		if($images->length>0) {
+		$html  = '<div>';
-			// First image from the list
+		$html .= '<label>'.$Language->get('Default image').'</label>';
-			$image = $images->item(0);
+		$html .= '<select name="defaultImage">';
-			// Get value from attribute src
+
-			$imgSrc = $image->getAttribute('src');
+		$images = Filesystem::listFiles(PATH_UPLOADS);
-			// Returns the image src
+		foreach ($images as $image) {
-			return $imgSrc;
+			$base = basename($image);
+			$html .= '<option value="'.$base.'" '.(($this->getValue('defaultImage')==$base)?'selected':'').'>'.$base.'</option>';
 		}
 
-		return false;
+		$html .= '</select>';
+		$html .= '</div>';
+
+		return $html;
 	}
 
 	public function siteHead()
@@ -41,7 +48,7 @@ class pluginOpenGraph extends Plugin {
 			'siteName'	=>$Site->title()
 		);
 
-		switch($WHERE_AM_I) {
+		switch ($WHERE_AM_I) {
 			// The user filter by page
 			case 'page':
 				$og['type']		= 'article';
@@ -73,11 +80,13 @@ class pluginOpenGraph extends Plugin {
 		$html .= '<meta property="og:siteName" content="'.$og['siteName'].'">'.PHP_EOL;
 
 		// If the page doesn't have a coverImage try to get an image from the HTML content
-		if( empty($og['image']) ) {
+		if (empty($og['image'])) {
 			// Get the image from the content
 			$src = $this->getImage($content);
-			if($src!==false) {
+			if ($src!==false) {
-				$og['image'] = DOMAIN.$src;
+				$og['image'] = $src;
+			} else {
+				$og['image'] = DOMAIN_UPLOADS.$this->getValue('defaultImage');
 			}
 		}
 
@@ -85,4 +94,25 @@ class pluginOpenGraph extends Plugin {
 
 		return $html;
 	}
+
+	// Returns the first image from the HTML content
+	private function getImage($content)
+	{
+		$dom = new DOMDocument();
+		$dom->loadHTML('<meta http-equiv="content-type" content="text/html; charset=utf-8">'.$content);
+		$finder = new DomXPath($dom);
+
+		$images = $finder->query("//img");
+
+		if($images->length>0) {
+			// First image from the list
+			$image = $images->item(0);
+			// Get value from attribute src
+			$imgSrc = $image->getAttribute('src');
+			// Returns the image src
+			return $imgSrc;
+		}
+
+		return false;
+	}
 }

bl-plugins/twitter-cards/plugin.php

@@ -2,6 +2,34 @@
 
 class pluginTwitterCards extends Plugin {
 
+	public function init()
+	{
+		// Fields and default values for the database of this plugin
+		$this->dbFields = array(
+			'defaultImage'=>''
+		);
+	}
+
+	public function form()
+	{
+		global $Language;
+
+		$html  = '<div>';
+		$html .= '<label>'.$Language->get('Default image').'</label>';
+		$html .= '<select name="defaultImage">';
+
+		$images = Filesystem::listFiles(PATH_UPLOADS);
+		foreach ($images as $image) {
+			$base = basename($image);
+			$html .= '<option value="'.$base.'" '.(($this->getValue('defaultImage')==$base)?'selected':'').'>'.$base.'</option>';
+		}
+
+		$html .= '</select>';
+		$html .= '</div>';
+
+		return $html;
+	}
+
 	public function siteHead()
 	{
 		global $Url;
@@ -49,8 +77,10 @@ class pluginTwitterCards extends Plugin {
 		if( empty($data['image']) ) {
 			// Get the image from the content
 			$src = $this->getImage($content);
-			if($src!==false) {
+			if ($src!==false) {
-				$data['image'] = DOMAIN.$src;
+				$og['image'] = $src;
+			} else {
+				$og['image'] = DOMAIN_UPLOADS.$this->getValue('defaultImage');
 			}
 		}