Empty tag search will look for not tagged links

Fixes #784

From now, searching for tags with an empty value will return only not tagged links,
with the search bar showing `x results [not tagged]`.

Note that using the api, the searchtags request parameter must be set to `false` to get the same result.

  - [ ] Update API doc

1 files changed, 25 insertions, 1 deletions

diff --git a/tests/utils/ReferenceLinkDB.php b/tests/utils/ReferenceLinkDB.php
index 36d58c68..29d63fac 100644
--- a/tests/utils/ReferenceLinkDB.php
+++ b/tests/utils/ReferenceLinkDB.php
@@ -4,7 +4,7 @@
  */
 class ReferenceLinkDB
 {
-    public static $NB_LINKS_TOTAL = 8;
+    public static $NB_LINKS_TOTAL = 9;
 
     private $_links = array();
     private $_publicCount = 0;
@@ -38,6 +38,16 @@ class ReferenceLinkDB
         );
 
         $this->addLink(
+            9,
+            'PSR-2: Coding Style Guide',
+            'http://www.php-fig.org/psr/psr-2/',
+            'This guide extends and expands on PSR-1, the basic coding standard.',
+            0,
+            DateTime::createFromFormat(LinkDB::LINK_DATE_FORMAT, '20121206_152312'),
+            ''
+        );
+
+        $this->addLink(
             8,
             'Free as in Freedom 2.0 @website',
             'https://static.fsf.org/nosvn/faif-2.0.pdf',
@@ -161,6 +171,20 @@ class ReferenceLinkDB
         return $this->_privateCount;
     }
 
+    /**
+     * Returns the number of links without tag
+     */
+    public function countUntaggedLinks()
+    {
+        $cpt = 0;
+        foreach ($this->_links as $link) {
+            if (empty($link['tags'])) {
+                ++$cpt;
+            }
+        }
+        return $cpt;
+    }
+
     public function getLinks()
     {
         return $this->_links;