From b3c5212c845eaccf499767d943738c8350ad98ac Mon Sep 17 00:00:00 2001
From: rr- <rr-@sakuya.pl>
Date: Tue, 24 Nov 2015 21:56:27 +0100
Subject: [PATCH] Added ability to search tags by usage count

---
 src/Search/Filters/TagFilter.php       |  1 +
 src/Search/Parsers/TagSearchParser.php | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/src/Search/Filters/TagFilter.php b/src/Search/Filters/TagFilter.php
index 4fee563a..698293aa 100644
--- a/src/Search/Filters/TagFilter.php
+++ b/src/Search/Filters/TagFilter.php
@@ -13,6 +13,7 @@ class TagFilter extends BasicFilter implements IFilter
     const REQUIREMENT_CREATION_TIME = 'creationTime';
     const REQUIREMENT_LAST_EDIT_TIME = 'lastEditTime';
     const REQUIREMENT_CATEGORY = 'category';
+    const REQUIREMENT_USAGE_COUNT = 'usages';
 
     public function __construct()
     {
diff --git a/src/Search/Parsers/TagSearchParser.php b/src/Search/Parsers/TagSearchParser.php
index 3e77c204..7163ad60 100644
--- a/src/Search/Parsers/TagSearchParser.php
+++ b/src/Search/Parsers/TagSearchParser.php
@@ -40,6 +40,16 @@ class TagSearchParser extends AbstractSearchParser
             return;
         }
 
+        if ($this->matches($token->getKey(), ['usage_count', 'usages', 'usage']))
+        {
+            $this->addRequirementFromToken(
+                $filter,
+                $token,
+                TagFilter::REQUIREMENT_USAGE_COUNT,
+                self::ALLOW_RANGES | self::ALLOW_COMPOSITE);
+            return;
+        }
+
         if ($this->matches($token->getKey(), ['category']))
         {
             $this->addRequirementFromToken(