From 488fc63b67312640dcac68a324794ec4a591ba6d Mon Sep 17 00:00:00 2001
From: Maryana Rozhankivska <mariroz@mr.lviv.ua>
Date: Fri, 14 Feb 2014 17:27:22 +0200
Subject: [PATCH] duplicate check added. fix of issue #400

---
 inc/poche/Database.class.php | 16 ++++++++++++++++
 inc/poche/Poche.class.php    | 19 +++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/inc/poche/Database.class.php b/inc/poche/Database.class.php
index 9f553fa..58583bf 100644
--- a/inc/poche/Database.class.php
+++ b/inc/poche/Database.class.php
@@ -241,6 +241,22 @@ class Database {
         return isset($entry[0]) ? $entry[0] : null;
     }
 
+    public function retrieveOneByURL($url, $user_id) {
+        $entry  = NULL;
+        $sql    = "SELECT * FROM entries WHERE url=? AND user_id=?";
+        $params = array($url, $user_id);
+        $query  = $this->executeQuery($sql, $params);
+        $entry  = $query->fetchAll();
+
+        return isset($entry[0]) ? $entry[0] : null;
+    }
+
+    public function reassignTags($old_entry_id, $new_entry_id) {
+        $sql    = "UPDATE tags_entries SET entry_id=? WHERE entry_id=?";
+        $params = array($new_entry_id, $old_entry_id);
+        $query  = $this->executeQuery($sql, $params);
+    }
+
     public function getEntriesByView($view, $user_id, $limit = '') {
         switch ($_SESSION['sort'])
         {
diff --git a/inc/poche/Poche.class.php b/inc/poche/Poche.class.php
index d0e2de1..7616929 100644
--- a/inc/poche/Poche.class.php
+++ b/inc/poche/Poche.class.php
@@ -374,6 +374,11 @@ class Poche
                 $title = ($content['rss']['channel']['item']['title'] != '') ? $content['rss']['channel']['item']['title'] : _('Untitled');
                 $body = $content['rss']['channel']['item']['description'];
 
+                //search for possible duplicate if not in import mode
+                if (!$import) {
+                    $duplicate = $this->store->retrieveOneByURL($url->getUrl(), $this->user->getId());
+                }
+
                 if ($this->store->add($url->getUrl(), $title, $body, $this->user->getId())) {
                     Tools::logm('add link ' . $url->getUrl());
                     $sequence = '';
@@ -386,6 +391,20 @@ class Poche
                         Tools::logm('updating content article');
                         $this->store->updateContent($last_id, $content, $this->user->getId());
                     }
+
+                    if ($duplicate != NULL) {
+                        // duplicate exists, so, older entry needs to be deleted (as new entry should go to the top of list), BUT favorite mark and tags should be preserved
+                        Tools::logm('link ' . $url->getUrl() . ' is a duplicate');
+                        // 1) - preserve tags and favorite, then drop old entry
+                        $this->store->reassignTags($duplicate['id'], $last_id);
+                        if ($duplicate['is_fav']) {
+                          $this->store->favoriteById($last_id, $this->user->getId());
+                        }
+                        if ($this->store->deleteById($duplicate['id'], $this->user->getId())) {
+                          Tools::logm('previous link ' . $url->getUrl() .' entry deleted');
+                        }
+                    }
+
                     if (!$import) {
                         $this->messages->add('s', _('the link has been added successfully'));
                     }