feat: Cache form attributes

src/App/Repository/Concerns/CachesData.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace Ushahidi\App\Repository\Concerns;
+
+use Illuminate\Support\Facades\Cache;
+use Ushahidi\Core\Entity;
+
+trait CachesData
+{
+
+    /**
+     * Cache lifetime in minutes
+     */
+    protected $cache_lifetime = 1;
+
+    // CreateRepository
+    // ReadRepository
+    // UpdateRepository
+    // DeleteRepository
+    public function get($id, $fresh = false)
+    {
+
+        $resource = $this->getEntity()->getResource();
+        $key = "$resource.$id";
+
+        // If `fresh` then wipe cached result first
+        if ($fresh) {
+            Cache::forget($key);
+        }
+
+        return Cache::tags([$resource])->remember($key, $this->cache_lifetime, function () use ($id) {
+            return parent::get($id);
+        });
+    }
+
+    // UpdateRepository
+    public function update(Entity $entity)
+    {
+        Cache::forget($entity->getResource() . '.' . $entity->getId());
+
+        return parent::update($entity);
+    }
+
+    // DeleteRepository
+    public function delete(Entity $entity)
+    {
+        Cache::forget($entity->getResource() . '.' . $entity->getId());
+
+        return parent::delete($entity);
+    }
+
+    /**
+     * Check if an entity with the given id exists
+     * @param  int $id
+     * @return bool
+     */
+    public function exists($id)
+    {
+        $resource = $this->getEntity()->getResource();
+        $key = "$resource.$id";
+
+        // If the record is cached, it exists obviously
+        if (Cache::has($key)) {
+            return true;
+        }
+
+        // @todo how can we cache this?!
+        return (bool) $this->selectCount([
+            $this->getTable().'.id' => $id
+        ]);
+    }
+}

src/App/Repository/Form/AttributeRepository.php

@@ -24,6 +24,7 @@
 use Ushahidi\App\Repository\OhanzeeRepository;
 use Ushahidi\App\Repository\JsonTranscodeRepository;
 use Ushahidi\App\Repository\FormsTagsTrait;
+use Ushahidi\App\Repository\Concerns\CachesData;
 
 use Ushahidi\Core\Tool\Permissions\InteractsWithFormPermissions;
 
@@ -47,6 +48,7 @@ class AttributeRepository extends OhanzeeRepository implements
     // Use the JSON transcoder to encode properties
     use JsonTranscodeRepository;
     use FormsTagsTrait;
+    use CachesData;
 
     /**
      * Construct