Move Tags assigner to a separate file

[github/wallabag/wallabag.git] / src / Wallabag / CoreBundle / Helper / TagsAssigner.php

diff --git a/src/Wallabag/CoreBundle/Helper/TagsAssigner.php b/src/Wallabag/CoreBundle/Helper/TagsAssigner.php
new file mode 100644 (file)
index 0000000..ae712d7
--- /dev/null
+++ b/src/Wallabag/CoreBundle/Helper/TagsAssigner.php
@@ -0,0 +1,76 @@
+<?php
+
+namespace Wallabag\CoreBundle\Helper;
+
+use Wallabag\CoreBundle\Entity\Entry;
+use Wallabag\CoreBundle\Entity\Tag;
+use Wallabag\CoreBundle\Repository\TagRepository;
+
+class TagsAssigner
+{
+
+    /**
+     * @var TagRepository $tagRepository
+     */
+    protected $tagRepository;
+
+    public function __construct(TagRepository $tagRepository)
+    {
+        $this->tagRepository = $tagRepository;
+    }
+
+    /**
+     * Assign some tags to an entry.
+     *
+     * @param Entry        $entry
+     * @param array|string $tags          An array of tag or a string coma separated of tag
+     * @param array        $entitiesReady Entities from the EntityManager which are persisted but not yet flushed
+     *                                    It is mostly to fix duplicate tag on import @see http://stackoverflow.com/a/7879164/569101
+     *
+     * @return Tag[]
+     */
+    public function assignTagsToEntry(Entry $entry, $tags, array $entitiesReady = [])
+    {
+        $tagsEntities = [];
+
+        if (!is_array($tags)) {
+            $tags = explode(',', $tags);
+        }
+
+        // keeps only Tag entity from the "not yet flushed entities"
+        $tagsNotYetFlushed = [];
+        foreach ($entitiesReady as $entity) {
+            if ($entity instanceof Tag) {
+                $tagsNotYetFlushed[$entity->getLabel()] = $entity;
+            }
+        }
+
+        foreach ($tags as $label) {
+            $label = trim($label);
+
+            // avoid empty tag
+            if (0 === strlen($label)) {
+                continue;
+            }
+
+            if (isset($tagsNotYetFlushed[$label])) {
+                $tagEntity = $tagsNotYetFlushed[$label];
+            } else {
+                $tagEntity = $this->tagRepository->findOneByLabel($label);
+
+                if (null === $tagEntity) {
+                    $tagEntity = new Tag();
+                    $tagEntity->setLabel($label);
+                }
+            }
+
+            // only add the tag on the entry if the relation doesn't exist
+            if (false === $entry->getTags()->contains($tagEntity)) {
+                $entry->addTag($tagEntity);
+                $tagsEntities[] = $tagEntity;
+            }
+        }
+
+        return $tagsEntities;
+    }
+}