From 9921a789e5c67b2a1c724411ec741694052a3934 Mon Sep 17 00:00:00 2001
From: Tim Schumacher <tim@bandenkrieg.hacked.jp>
Date: Wed, 15 Oct 2014 17:23:12 +0200
Subject: [PATCH] Implemented search by tags with these operators: AND (&), OR
 (|)

Fixes #30
---
 .../Controller/TagController.php              | 100 +++++++++++++++---
 .../Resources/views/Event/index.html.twig     |  35 ++++--
 2 files changed, 116 insertions(+), 19 deletions(-)

diff --git a/src/Hackspace/Bundle/CalciferBundle/Controller/TagController.php b/src/Hackspace/Bundle/CalciferBundle/Controller/TagController.php
index 1d0c43b..56974f5 100755
--- a/src/Hackspace/Bundle/CalciferBundle/Controller/TagController.php
+++ b/src/Hackspace/Bundle/CalciferBundle/Controller/TagController.php
@@ -25,6 +25,7 @@ use Jsvrcek\ICS\Utility\Formatter;
 use Jsvrcek\ICS\CalendarStream;
 use Jsvrcek\ICS\CalendarExport;
 use Symfony\Component\Validator\Constraints\DateTime;
+use Doctrine\ORM\Query\ResultSetMappingBuilder;
 
 /**
  * Tag controller.
@@ -47,26 +48,98 @@ class TagController extends Controller
 
         /** @var EntityRepository $repo */
         $repo = $em->getRepository('CalciferBundle:Tag');
+        $tags = [];
+        $operator = 'or';
+        if (strpos($slug,'|') !== false) {
+            $slugs = explode('|',$slug);
+            foreach($slugs as $item) {
+                /** @var Tag $tag */
+                $tag = $repo->findOneBy(['slug' => $item]);
 
-        /** @var Tag $location */
-        $tag = $repo->findOneBy(['slug' => $slug]);
+                if ($tag instanceof Tag) {
+                    $tags[] = $tag;
+                }
+            }
+        } else if (strpos($slug,'&') !== false) {
+            $slugs = explode('&',$slug);
+            $operator = 'and';
+            foreach($slugs as $item) {
+                /** @var Tag $tag */
+                $tag = $repo->findOneBy(['slug' => $item]);
 
-        if (!$tag) {
+                if ($tag instanceof Tag) {
+                    $tags[] = $tag;
+                }
+            }
+        } else {
+            /** @var Tag $tag */
+            $tag = $repo->findOneBy(['slug' => $slug]);
+
+            if ($tag instanceof Tag) {
+                $tags[] = $tag;
+            }
+        }
+
+        if (count($tags) == 0) {
             throw $this->createNotFoundException('Unable to find tag entity.');
         }
 
         $now = new \DateTime();
         $now->setTime(0, 0, 0);
 
-        /** @var QueryBuilder $qb */
-        $qb = $em->createQueryBuilder();
-        $qb->select(array('e'))
-            ->from('CalciferBundle:Event', 'e')
-            ->join('e.tags', 't', 'WITH', $qb->expr()->in('t.id', $tag->id))
-            ->where('e.startdate >= :startdate')
-            ->orderBy('e.startdate')
-            ->setParameter('startdate', $now);
-        $entities = $qb->getQuery()->execute();
+        $entities = null;
+        if ($operator == 'and') {
+            $sql = <<<EOF
+SELECT * FROM events AS e
+WHERE id IN (
+WITH events_on_tags AS (
+  SELECT events_id, array_agg(tags_id) as tags
+  FROM events2tags
+  GROUP BY events_id
+)
+SELECT events_id FROM events_on_tags
+WHERE tags @> array[@tags@]
+)
+AND e.startdate >= :startdate
+ORDER BY e.startdate
+EOF;
+            $tag_ids = array_reduce($tags,function($carry,$item){
+                if (strlen($carry) == 0) {
+                    return $item->id;
+                } else {
+                    return $carry . ',' . $item->id;
+                }
+            });
+
+            $sql = str_replace('@tags@',$tag_ids,$sql);
+
+            $rsm = new ResultSetMappingBuilder($em);
+            $rsm->addRootEntityFromClassMetadata('CalciferBundle:Event','e');
+
+            $query = $em->createNativeQuery($sql,$rsm);
+
+            $query->setParameter('startdate',$now);
+
+            $entities = $query->getResult();
+
+        } else {
+            /** @var QueryBuilder $qb */
+            $qb = $em->createQueryBuilder();
+            $qb->select(array('e'))
+                ->from('CalciferBundle:Event', 'e')
+                ->where('e.startdate >= :startdate')
+                ->orderBy('e.startdate')
+                ->setParameter('startdate', $now);
+
+            $qb->join('e.tags', 't', 'WITH', $qb->expr()->in('t.id', array_reduce($tags,function($carry,$item){
+                if (strlen($carry) == 0) {
+                    return $item->id;
+                } else {
+                    return $carry . ',' . $item->id;
+                }
+            })));
+            $entities = $qb->getQuery()->execute();
+        }
 
         if ($format == 'ics') {
             $calendar = new Calendar();
@@ -110,7 +183,8 @@ class TagController extends Controller
         } else {
             return array(
                 'entities' => $entities,
-                'tag' => $tag,
+                'tags' => $tags,
+                'operator' => $operator,
             );
         }
     }
diff --git a/src/Hackspace/Bundle/CalciferBundle/Resources/views/Event/index.html.twig b/src/Hackspace/Bundle/CalciferBundle/Resources/views/Event/index.html.twig
index bc86b24..457520b 100755
--- a/src/Hackspace/Bundle/CalciferBundle/Resources/views/Event/index.html.twig
+++ b/src/Hackspace/Bundle/CalciferBundle/Resources/views/Event/index.html.twig
@@ -23,7 +23,22 @@
         <div class="ui column">
             <h1>
                 Termine
-                {% if tag|default(false) %} für Tag „{{ tag.name }}“{% endif %}
+                {% if tags|default(false) %}
+                    {% if tags|length == 1 %}
+                        für Tag {{ tags[0].name }}
+                    {% elseif(tags|length == 2) %}
+                        für die Tags {{ tags[0].name }} {% if operator == 'or' %}oder{% else %}und{% endif %} {{ tags[1].name }}
+                    {% else %}
+                        für die Tags
+                        {% for tag in tags %}
+                            {% if not loop.last %}
+                                {{ tag.name }}{% if loop.index < (tags|length - 1) %},{% endif %}
+                            {% else %}
+                                {% if operator == 'or' %}oder{% else %}und{% endif %} {{ tag.name }}
+                            {% endif %}
+                        {% endfor %}
+                    {% endif %}
+                {% endif %}
                 {% if location|default(false) %} für Ort „{{ location.name }}“ <a class="location-edit" href="{{ path("location_edit",{slug:location.slug}) }}"><i class="ui icon edit inverted green circular link" data-content="Ort bearbeiten" title="Ort bearbeiten"></i> </a> {% endif %}
             </h1>
             {% if tag|default(false) %}
@@ -68,10 +83,18 @@
         </div>
     </div>
 
-    <div class="ui three column page grid stackable">
-        {% for entity in entities %}
-            {{ include('CalciferBundle:Event:event_box.html.twig',{'truncate_summary':true}) }}
-        {% endfor %}
-    </div>
+    {% if entities|length > 0 %}
+        <div class="ui three column page grid stackable">
+            {% for entity in entities %}
+                {{ include('CalciferBundle:Event:event_box.html.twig',{'truncate_summary':true}) }}
+            {% endfor %}
+        </div>
+    {% else %}
+        <div class="ui one column page grid stackable">
+            <div class="ui column">
+                <p>Es konnten keine Termine gefunden werden.</p>
+            </div>
+        </div>
+    {% endif %}
 
 {% endblock %}