[InstagramBridge] Fix GraphSidecar output

Fix following issues which related to output of the GraphSidecar type posts.
- The GraphSidecar post's media wasn't outputted except for first picture when searching by hashtag or location
- Video didn't embedded
NOTE:
The function getInstagramStory() which was called when the post type is GraphSidecar didn't seem to work just as one intended.
Because the web request called in that function is just to get the media of single post, NOT to get the media of Story.
But I don't have any idea to solve RSS-Bridge#694, so it seems be better to rename these function and member variable properly.

bridges/InstagramBridge.php

@@ -48,7 +48,7 @@ class InstagramBridge extends BridgeAbstract {
 
 	const USER_QUERY_HASH = '58b6785bea111c67129decbe6a448951';
 	const TAG_QUERY_HASH = '174a5243287c5f3a7de741089750ab3b';
-	const STORY_QUERY_HASH = '865589822932d1b43dfe312121dd353a';
+	const SHORTCODE_QUERY_HASH = '865589822932d1b43dfe312121dd353a';
 
 	protected function getInstagramUserId($username) {
 
@@ -124,21 +124,16 @@ public function collectData(){
 				$item['author'] = $media->owner->username;
 			}
 
-			if (isset($media->edge_media_to_caption->edges[0]->node->text)) {
-				$textContent = $media->edge_media_to_caption->edges[0]->node->text;
-			} else {
-				$textContent = '(no text)';
-			}
+			$textContent = $this->getTextContent($media);
 
-			$item['title'] = ($media->is_video ? '▶ ' : '') . trim($textContent);
+			$item['title'] = ($media->is_video ? '▶ ' : '') . $textContent;
 			$titleLinePos = strpos(wordwrap($item['title'], 120), "\n");
 			if ($titleLinePos != false) {
 				$item['title'] = substr($item['title'], 0, $titleLinePos) . '...';
 			}
 
-			if(!is_null($this->getInput('u')) && $media->__typename == 'GraphSidecar') {
-
-				$data = $this->getInstagramStory($item['uri']);
+			if($media->__typename == 'GraphSidecar') {
+				$data = $this->getInstagramSidecarData($item['uri']);
 				$item['content'] = $data[0];
 				$item['enclosures'] = $data[1];
 			} else {
@@ -159,38 +154,48 @@ public function collectData(){
 		}
 	}
 
-	protected function getInstagramStory($uri) {
+	// returns Sidecar(a post which has multiple media)'s contents and enclosures
+	protected function getInstagramSidecarData($uri) {
 
 		$shortcode = explode('/', $uri)[4];
 		$data = getContents(self::URI .
 					'graphql/query/?query_hash=' .
-					 self::STORY_QUERY_HASH .
-					 '&variables={"shortcode"%3A"' .
+					self::SHORTCODE_QUERY_HASH .
+					'&variables={"shortcode"%3A"' .
 					$shortcode .
 					'"}');
 
 		$mediaInfo = json_decode($data)->data->shortcode_media;
 
-		//Process the first element, that isn't in the node graph
-		if (count($mediaInfo->edge_media_to_caption->edges) > 0) {
-			$caption = $mediaInfo->edge_media_to_caption->edges[0]->node->text;
-		} else {
-			$caption = '';
-		}
+		$textContent = $this->getTextContent($mediaInfo);
 
-		$enclosures = array($mediaInfo->display_url);
-		$content = '<img src="' . htmlentities($mediaInfo->display_url) . '" alt="' . $caption . '" />';
-
-		foreach($mediaInfo->edge_sidecar_to_children->edges as $media) {
-			$display_url = $media->node->display_url;
-			if(!in_array($display_url, $enclosures)) { // add only if not added yet
-				$content .= '<img src="' . htmlentities($display_url) . '" alt="' . $caption . '" />';
-				$enclosures[] = $display_url;
+		$enclosures = array();
+		foreach($mediaInfo->edge_sidecar_to_children->edges as $singleMedia) {
+			$singleMedia = $singleMedia->node;
+			if($singleMedia->is_video) {
+				if(in_array($singleMedia->video_url, $enclosures)) continue; // check if not added yet
+				$content .= '<video controls><source src="' . $singleMedia->video_url . '" type="video/mp4"></video><br>';
+				array_push($enclosures, $singleMedia->video_url);
+			} else {
+				if(in_array($singleMedia->display_url, $enclosures)) continue; // check if not added yet
+				$content .= '<a href="' . $singleMedia->display_url . '" target="_blank">';
+				$content .= '<img src="' . $singleMedia->display_url . '" alt="' . $item['title'] . '" />';
+				$content .= '</a><br>';
+				array_push($enclosures, $singleMedia->display_url);						
 			}
 		}
+		$content .= '<br>' . nl2br(htmlentities($textContent));
 
 		return array($content, $enclosures);
+	}
 
+	protected function getTextContent($media) {
+		$textContent = '(no text)';
+		//Process the first element, that isn't in the node graph
+		if (count($media->edge_media_to_caption->edges) > 0) {
+			$textContent = trim($media->edge_media_to_caption->edges[0]->node->text);
+		}
+		return $textContent;
 	}
 
 	protected function getInstagramJSON($uri) {