Feeds for Mastodon

2 files changed, 113 insertions, 4 deletions

diff --git a/app/Http/Controllers/FeedController.php b/app/Http/Controllers/FeedController.php
index 5b9c36a..43b31ef 100644
--- a/app/Http/Controllers/FeedController.php
+++ b/app/Http/Controllers/FeedController.php
@@ -24,6 +24,11 @@ class FeedController extends Controller
 	$articles = Article::orderBy('created_at', 'desc')->take(20)->get();
 	return Helper::makeFeed($articles, "mastodon");
     }
+    public function mastodon_test()
+    {
+	$articles = Article::orderBy('created_at', 'desc')->take(20)->get();
+	return Helper::makeFeed($articles, "mastodon_test");
+    }
 
     public function popular()
     {
diff --git a/app/Libraries/Helper.php b/app/Libraries/Helper.php
index 41d26e5..8164887 100644
--- a/app/Libraries/Helper.php
+++ b/app/Libraries/Helper.php
@@ -59,7 +59,7 @@ class Helper {
 	       $feed->lang = 'en';
 	       $feed->setShortening(false); // true or false
 
-	       if ( "mastodon" == $title ) {
+	       if ( "mastodon" == $title || "mastodon_test" == $title ) {
 		       $feed->setTextLimit(500); // maximum length of description text
 	       } else {
 		       $feed->setTextLimit(100); // maximum length of description text
@@ -71,7 +71,7 @@ class Helper {
 		       $desc = ($post->excerpt_html);
 		       $categories = null;
 
-		       if ( "mastodon" == $title ) {
+		       if ( "mastodon" == $title || "mastodon_test" == $title ) {
 
 			       $cat_len= 0;
 
@@ -115,7 +115,12 @@ class Helper {
 			       // max desc length is 500 - 23 (Link) - $cat_len - 2 (white spaces)
 			       $max_len = 500 - 23 - $cat_len - 2;
 
-			       $desc = Helper::first_sentence($desc, $max_len);
+				if ( "mastodon_test" == $title ) {
+				       $desc = Helper::mastodon_summary($desc, $max_len);
+				}else {
+				       $desc = Helper::first_sentence($desc, $max_len);
+				       #$desc = Helper::mastodon_summary($desc, $max_len);
+				}
 
 			       $desc .= " " . $categories;# . $discussions;
 
@@ -188,5 +193,104 @@ class Helper {
 		}
 
 	}
-}
 
+	private static function next_sentence($content, $max_len = NULL) {
+
+		$content = ltrim($content);
+		$pos = strpos($content, '.');
+
+		if($pos === false) {
+			if ( is_null($max_len) ) {
+				return $content;
+			} else {
+				return substr($content, 0, $max_len);
+			}
+		} else {
+			return substr($content, 0, $pos+1);
+		}
+
+	}
+
+	/**
+	 * Make sure to toot as much text as possible while still staying below the limit of 500 chars -link (23 chars) - 2 (white spaces) - possible hashtags
+	 */
+	public static function mastodon_summary($excerpt, $max_len = 475){
+
+		/**
+		 * Strip HTML from Wikipedia excerpt
+		 */
+		$excerpt = ltrim(html_entity_decode(strip_tags($excerpt)));
+
+		/**
+		 * The toot to be returned
+		 */
+		$content = "";
+
+		/**
+		 * https://stackoverflow.com/questions/16377437/split-a-text-into-sentences
+		 */
+		$sentences = preg_split('/(?<=[.?!])\s+(?=[a-z])/i', $excerpt);
+		echo "<pre>";
+		echo "-----------------------";
+		var_dump($excerpt);
+		var_dump($sentences);
+
+		for ( $i = 0; $i < count($sentences); $i++ ) {
+			#if ( mb_strlen($content) < $max_len && (mb_strlen($content) + mb_strlen($sentences) ) {
+			if ( mb_strlen($content) < $max_len && (mb_strlen($content) + mb_strlen($sentences) ) < $max_len ){
+
+				//var_dump(rtrim(ltrim($sentences[$i])));
+				$content .= rtrim(ltrim($sentences[$i]));
+				var_dump("ok", $max_len);
+
+				$max_len = $max_len - mb_strlen($sentences[$i]);
+				var_dump("ok", $max_len);
+
+			} else {
+				var_dump("fail", mb_strlen($content), $max_len);
+				break;
+			}
+		}
+		return $content;
+
+		echo "<pre>";
+		while ( mb_strlen($content) < $max_len ) {
+
+			/**
+			 * Get next sentence
+			 */
+			$next_sentence = Helper::next_sentence($excerpt, $max_len);
+			var_dump($next_sentence);
+
+			if ( "" == $next_sentence ) {
+				break;
+			}
+
+			/**
+			 * Check if $content + $next_sentence is still under $max_len
+			 */
+			if ( (mb_strlen($content) + mb_strlen($next_sentence)) < $max_len ) {
+
+				/**
+				 * add text
+				 */
+				$content .= $next_sentence;
+
+				/**
+				 * Recalc $max_len
+				 */
+				$max_len = $max_len - mb_strlen($next_sentence);
+
+				/**
+				 * Remove sentence from excerpt
+				 */
+				$excerpt = substr($excerpt, mb_strlen($next_sentence));
+
+			} else {
+				break;
+			}
+		}
+
+		return $content;
+	}
+}