New component for post excerpts, which will be shown in search results

Perhaps also in user activity stream. They are used in the mentions
extension.

In order to generate the excerpt, each formatter can implement a
“strip” method which basically converts block formatting into inline
formatting.

framework/core/js/forum/src/components/post-preview.js

@@ -0,0 +1,22 @@
+import Component from 'flarum/component';
+import avatar from 'flarum/helpers/avatar';
+import username from 'flarum/helpers/username';
+import humanTime from 'flarum/helpers/human-time';
+
+export default class PostPreview extends Component {
+  view() {
+    var post = this.props.post;
+    var user = post.user();
+
+    return m('a.post-preview', {
+      href: app.route.post(post),
+      config: m.route,
+      onclick: this.props.onclick
+    }, m('div.post-preview-content', [
+      avatar(user), ' ',
+      username(user), ' ',
+      humanTime(post.time()), ' ',
+      post.excerpt()
+    ]));
+  }
+}

framework/core/js/lib/models/post.js

@@ -12,6 +12,7 @@ Post.prototype.user = Model.one('user');
 Post.prototype.contentType = Model.prop('contentType');
 Post.prototype.content = Model.prop('content');
 Post.prototype.contentHtml = Model.prop('contentHtml');
+Post.prototype.excerpt = Model.prop('excerpt');
 
 Post.prototype.editTime = Model.prop('editTime', Model.date);
 Post.prototype.editUser = Model.one('editUser');

framework/core/less/forum/discussion.less

@@ -338,6 +338,29 @@
   }
 }
 
+.post-preview {
+  color: @fl-body-muted-color;
+  padding-left: 50px;
+  line-height: 1.7em;
+
+  & .avatar {
+    float: left;
+    margin-left: -50px;
+    .avatar-size(32px);
+  }
+  & .username {
+    color: @fl-body-color;
+    font-weight: bold;
+    margin-right: 5px;
+  }
+  & time {
+    margin-right: 5px;
+    text-transform: uppercase;
+    font-size: 11px;
+    font-weight: 600;
+  }
+}
+
 @media @phone {
   .post-header {
     & .avatar {

framework/core/src/Api/Serializers/PostBasicSerializer.php

@@ -39,7 +39,7 @@ class PostBasicSerializer extends BaseSerializer
         ];
 
         if ($post->type === 'comment') {
-            $attributes['content'] = str_limit($post->content, 200);
+            $attributes['excerpt'] = str_limit($post->contentPlain, 200);
         } else {
             $attributes['content'] = $post->content;
         }

framework/core/src/Core/Formatter/FormatterManager.php

@@ -26,16 +26,6 @@ class FormatterManager
 
 	public function add($name, $formatter, $priority = 0)
 	{
-		$this->remove($name);
-
-		if (is_string($formatter)) {
-			$formatter = function () use ($formatter) {
-				$callable = array($this->container->make($formatter), 'format');
-				$data = func_get_args();
-				return call_user_func_array($callable, $data);
-			};
-		}
-
 		$this->formatters[$name] = [$formatter, $priority];
 	}
 
@@ -44,23 +34,44 @@ class FormatterManager
 		unset($this->formatters[$name]);
 	}
 
-	public function format($text)
+    protected function getFormatters()
+    {
+        $sorted = [];
+
+        foreach ($this->formatters as $array) {
+            list($formatter, $priority) = $array;
+            $sorted[$priority][] = $formatter;
+        }
+
+        ksort($sorted);
+
+        $result = [];
+
+        foreach ($sorted as $formatters) {
+            $result = array_merge($result, $formatters);
+        }
+
+        return $result;
+    }
+
+	public function format($text, $post = null)
 	{
-		$sorted = [];
+		foreach ($this->getFormatters() as $formatter) {
-
+			$text = $this->container->make($formatter)->format($text, $post);
-		foreach ($this->formatters as $array) {
-			list($formatter, $priority) = $array;
-			$sorted[$priority][] = $formatter;
-		}
-
-		ksort($sorted);
-
-		foreach ($sorted as $formatters) {
-			foreach ($formatters as $formatter) {
-				$text = $formatter($text);
-			}
 		}
 
 		return $text;
 	}
+
+    public function strip($text)
+    {
+        foreach ($this->getFormatters() as $formatter) {
+            $formatter = $this->container->make($formatter);
+            if (method_exists($formatter, 'strip')) {
+                $text = $formatter->strip($text);
+            }
+        }
+
+        return $text;
+    }
 }

framework/core/src/Core/Models/CommentPost.php

@@ -35,7 +35,6 @@ class CommentPost extends Post
         $post = new static;
 
         $post->content       = $content;
-        $post->content_html  = static::formatContent($post->content);
         $post->time          = time();
         $post->discussion_id = $discussionId;
         $post->user_id       = $userId;
@@ -57,7 +56,7 @@ class CommentPost extends Post
     {
         if ($this->content !== $content) {
             $this->content = $content;
-            $this->content_html = static::formatContent($this->content);
+            $this->content_html = static::formatContent($this);
 
             $this->edit_time = time();
             $this->edit_user_id = $user->id;
@@ -113,13 +112,24 @@ class CommentPost extends Post
     public function getContentHtmlAttribute($value)
     {
         if (! $value) {
-            $this->content_html = $value = static::formatContent($this->content);
+            $this->content_html = $value = static::formatContent($this);
             $this->save();
         }
 
         return $value;
     }
 
+    /**
+     * Get the content formatter as HTML.
+     *
+     * @param  string  $value
+     * @return string
+     */
+    public function getContentPlainAttribute()
+    {
+        return static::$formatter->strip($this->content);
+    }
+
     /**
      * Get text formatter instance.
      *
@@ -146,8 +156,8 @@ class CommentPost extends Post
      * @param  string  $content
      * @return string
      */
-    protected static function formatContent($content)
+    protected static function formatContent($post)
     {
-        return static::$formatter->format($content);
+        return static::$formatter->format($post->content, $post);
     }
 }