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

tests/LinkDBTest.php

@@ -448,7 +448,7 @@ class LinkDBTest extends PHPUnit_Framework_TestCase
     public function testReorderLinksDesc()
     {
         self::$privateLinkDB->reorder('ASC');
-        $linkIds = array(42, 4, 1, 0, 7, 6, 8, 41);
+        $linkIds = array(42, 4, 9, 1, 0, 7, 6, 8, 41);
         $cpt = 0;
         foreach (self::$privateLinkDB as $key => $value) {
             $this->assertEquals($linkIds[$cpt++], $key);

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'))
         );
     }
@@ -425,6 +431,13 @@ class LinkFilterTest extends PHPUnit_Framework_TestCase
                 array('', $terms)
             ))
         );
+        $this->assertEquals(
+            1,
+            count(self::$linkFilter->filter(
+                LinkFilter::$FILTER_TAG | LinkFilter::$FILTER_TEXT,
+                array(false, 'PSR-2')
+            ))
+        );
         $this->assertEquals(
             1,
             count(self::$linkFilter->filter(

tests/api/controllers/GetLinksTest.php

@@ -94,7 +94,7 @@ class GetLinksTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals($this->refDB->countLinks(), count($data));
 
         // Check order
-        $order = [41, 8, 6, 7, 0, 1, 4, 42];
+        $order = [41, 8, 6, 7, 0, 1, 9, 4, 42];
         $cpt = 0;
         foreach ($data as $link) {
             $this->assertEquals(self::NB_FIELDS_LINK, count($link));
@@ -163,7 +163,7 @@ class GetLinksTest extends \PHPUnit_Framework_TestCase
         $data = json_decode((string) $response->getBody(), true);
         $this->assertEquals($this->refDB->countLinks(), count($data));
         // Check order
-        $order = [41, 8, 6, 7, 0, 1, 4, 42];
+        $order = [41, 8, 6, 7, 0, 1, 9, 4, 42];
         $cpt = 0;
         foreach ($data as $link) {
             $this->assertEquals(self::NB_FIELDS_LINK, count($link));

tests/api/controllers/InfoTest.php

@@ -80,7 +80,7 @@ class InfoTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(200, $response->getStatusCode());
         $data = json_decode((string) $response->getBody(), true);
 
-        $this->assertEquals(8, $data['global_counter']);
+        $this->assertEquals(\ReferenceLinkDB::$NB_LINKS_TOTAL, $data['global_counter']);
         $this->assertEquals(2, $data['private_counter']);
         $this->assertEquals('Shaarli', $data['settings']['title']);
         $this->assertEquals('?', $data['settings']['header_link']);
@@ -103,7 +103,7 @@ class InfoTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals(200, $response->getStatusCode());
         $data = json_decode((string) $response->getBody(), true);
 
-        $this->assertEquals(8, $data['global_counter']);
+        $this->assertEquals(\ReferenceLinkDB::$NB_LINKS_TOTAL, $data['global_counter']);
         $this->assertEquals(2, $data['private_counter']);
         $this->assertEquals($title, $data['settings']['title']);
         $this->assertEquals($headerLink, $data['settings']['header_link']);

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;
@@ -37,6 +37,16 @@ class ReferenceLinkDB
             'ut'
         );
 
+        $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',
@@ -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;