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, 16 insertions, 3 deletions

diff --git a/tests/LinkFilterTest.php b/tests/LinkFilterTest.php
index 37d5ca30..74162358 100644
--- a/tests/LinkFilterTest.php
+++ b/tests/LinkFilterTest.php
@@ -63,6 +63,12 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
             count(self::$linkFilter->filter(LinkFilter::$FILTER_TAG, ''))
         );
 
+        // Untagged only
+        $this->assertEquals(
+            self::$refDB->countUntaggedLinks(),
+            count(self::$linkFilter->filter(LinkFilter::$FILTER_TAG, false))
+        );
+
         $this->assertEquals(
             ReferenceLinkDB::$NB_LINKS_TOTAL,
             count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, ''))
@@ -146,7 +152,7 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
     public function testFilterDay()
     {
         $this->assertEquals(
-            3,
+            4,
             count(self::$linkFilter->filter(LinkFilter::$FILTER_DAY, '20121206'))
         );
     }
@@ -339,7 +345,7 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
         );
 
         $this->assertEquals(
-            7,
+            ReferenceLinkDB::$NB_LINKS_TOTAL - 1,
             count(self::$linkFilter->filter(LinkFilter::$FILTER_TEXT, '-revolution'))
         );
     }
@@ -399,7 +405,7 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
         );
 
         $this->assertEquals(
-            7,
+            ReferenceLinkDB::$NB_LINKS_TOTAL - 1,
             count(self::$linkFilter->filter(LinkFilter::$FILTER_TAG, '-free'))
         );
     }
@@ -429,6 +435,13 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
             1,
             count(self::$linkFilter->filter(
                 LinkFilter::$FILTER_TAG | LinkFilter::$FILTER_TEXT,
+                array(false, 'PSR-2')
+            ))
+        );
+        $this->assertEquals(
+            1,
+            count(self::$linkFilter->filter(
+                LinkFilter::$FILTER_TAG | LinkFilter::$FILTER_TEXT,
                 array($tags, '')
             ))
         );