Search queries: added search by likes/dislikes

data/help.md

@@ -29,6 +29,7 @@ You can use your keyboard to navigate around the site. There are a few shortcuts
 - having specific ID: [search]id:1,2,3,8[/search]
 - having ID no less than specified value: [search]idmin:28[/search]
 - by content type: [search]type:img[/search], [search]type:swf[/search], [search]type:yt[/search] (images, flash files and YouTube videos, respectively)
+- scored up/down by currently logged in user: [search]special:likes[/search] and [search]special:dislikes[/search]
 
 You can combine tags and negate any of them for interesting results. [search]sea -favmin:8 type:swf submit:Pirate[/search] will show you **flash files** tagged as **sea**, that were **liked by seven people** at most, uploaded by user **Pirate**.
 

src/Models/Model_Post_QueryBuilder.php

@@ -131,6 +131,43 @@ class Model_Post_QueryBuilder implements AbstractQueryBuilder
 		$dbQuery->addSql('comment_count <= ?')->put(intval($val));
 	}
 
+	protected static function filterTokenSpecial($dbQuery, $val)
+	{
+		$context = \Chibi\Registry::getContext();
+
+		switch (strtolower($val))
+		{
+			case 'liked':
+			case 'likes':
+				$dbQuery
+					->exists()
+					->open()
+					->select('1')
+					->from('postscore')
+					->where('post_id = post.id')
+					->and('score > 0')
+					->and('user_id = ?')->put($context->user->id)
+					->close();
+				break;
+
+			case 'disliked':
+			case 'dislikes':
+				$dbQuery
+					->exists()
+					->open()
+					->select('1')
+					->from('postscore')
+					->where('post_id = post.id')
+					->and('score < 0')
+					->and('user_id = ?')->put($context->user->id)
+					->close();
+				break;
+
+			default:
+				throw new SimpleException('Unknown special "' . $val . '"');
+		}
+	}
+
 	protected static function filterTokenType($dbQuery, $val)
 	{
 		switch (strtolower($val))