Fix error when filtering search tags

[github/shaarli/Shaarli.git] / application / LinkFilter.php

diff --git a/application/LinkFilter.php b/application/LinkFilter.php
index 17594e8f4ea5250d368b675932c62e65ce1b08a9..e693b28428ba3951d2a6898b75941e0c5bd50572 100644 (file)
--- a/application/LinkFilter.php
+++ b/application/LinkFilter.php
@@ -44,7 +44,7 @@ class LinkFilter
      * Filter links according to parameters.
      *
      * @param string $type          Type of filter (eg. tags, permalink, etc.).
-     * @param string $request       Filter content.
+     * @param mixed  $request       Filter content.
      * @param bool   $casesensitive Optional: Perform case sensitive filter if true.
      * @param bool   $privateonly   Optional: Only returns private links if true.
      *
@@ -55,16 +55,25 @@ class LinkFilter
         switch($type) {
             case self::$FILTER_HASH:
                 return $this->filterSmallHash($request);
-                break;
+            case self::$FILTER_TAG | self::$FILTER_TEXT:
+                if (!empty($request)) {
+                    $filtered = $this->links;
+                    if (isset($request[0])) {
+                        $filtered = $this->filterTags($request[0], $casesensitive, $privateonly);
+                    }
+                    if (isset($request[1])) {
+                        $lf = new LinkFilter($filtered);
+                        $filtered = $lf->filterFulltext($request[1], $privateonly);
+                    }
+                    return $filtered;
+                }
+                return $this->noFilter($privateonly);
             case self::$FILTER_TEXT:
                 return $this->filterFulltext($request, $privateonly);
-                break;
             case self::$FILTER_TAG:
                 return $this->filterTags($request, $casesensitive, $privateonly);
-                break;
             case self::$FILTER_DAY:
                 return $this->filterDay($request);
-                break;
             default:
                 return $this->noFilter($privateonly);
         }
@@ -101,6 +110,8 @@ class LinkFilter
      * @param string $smallHash permalink hash.
      *
      * @return array $filtered array containing permalink data.
+     *
+     * @throws LinkNotFoundException if the smallhash doesn't match any link.
      */
     private function filterSmallHash($smallHash)
     {
@@ -112,6 +123,11 @@ class LinkFilter
                 return $filtered;
             }
         }
+
+        if (empty($filtered)) {
+            throw new LinkNotFoundException();
+        }
+
         return $filtered;
     }
 
@@ -138,6 +154,10 @@ class LinkFilter
      */
     private function filterFulltext($searchterms, $privateonly = false)
     {
+        if (empty($searchterms)) {
+            return $this->links;
+        }
+
         $filtered = array();
         $search = mb_convert_case(html_entity_decode($searchterms), MB_CASE_LOWER, 'UTF-8');
         $exactRegex = '/"([^"]+)"/';
@@ -219,6 +239,12 @@ class LinkFilter
      */
     public function filterTags($tags, $casesensitive = false, $privateonly = false)
     {
+        // Implode if array for clean up.
+        $tags = is_array($tags) ? trim(implode(' ', $tags)) : $tags;
+        if (empty($tags)) {
+            return $this->links;
+        }
+
         $searchtags = self::tagsStrToArray($tags, $casesensitive);
         $filtered = array();
         if (empty($searchtags)) {
@@ -296,6 +322,11 @@ class LinkFilter
         $tagsOut = $casesensitive ? $tags : mb_convert_case($tags, MB_CASE_LOWER, 'UTF-8');
         $tagsOut = str_replace(',', ' ', $tagsOut);
 
-        return array_filter(explode(' ', trim($tagsOut)), 'strlen');
+        return array_values(array_filter(explode(' ', trim($tagsOut)), 'strlen'));
     }
 }
+
+class LinkNotFoundException extends Exception
+{
+    protected $message = 'The link you are trying to reach does not exist or has been deleted.';
+}