feat ： cache feed

app/code/Joshine/InstagramFeed/Block/MediaFeed.php

@@ -2,12 +2,23 @@
 namespace Joshine\InstagramFeed\Block;
 
 
+use Joshine\InstagramFeed\Model\Cache\Type;
 use Magento\Framework\App\Config\ScopeConfigInterface;
 use Magento\Framework\View\Element\Template;
 use Magento\Store\Model\ScopeInterface;
+use Magento\Framework\App\Cache;
+use phpDocumentor\Reflection\PseudoTypes\LiteralString;
+use Magento\Framework\Exception\NoSuchEntityException;
+use Magento\Framework\Serialize\Serializer\Json;
 
 class MediaFeed extends Template {
 
+    const TYPE_IDENTIFIER = 'instagram_feed';
+
+    const CACHE_TAG       = 'INSTAGRAM_FEED';
+
+    const CACHE_LIFETIME  = 60 * 60;
+
     protected $request;
 
     protected $_template = 'Joshine_InstagramFeed::mediafeed.phtml';
@@ -28,6 +39,12 @@ class MediaFeed extends Template {
      * @var \Magento\Framework\Json\Decoder
      */
     private $jsonDecoder;
+    /**
+     * @var string
+     */
+    private $id;
+
+    private $_json;
 
     public function __construct(
         Template\Context $context,
@@ -37,16 +54,18 @@ class MediaFeed extends Template {
         \Magento\Framework\HTTP\Client\Curl $curl,
         \Magento\Framework\Json\EncoderInterface $jsonEncoder,
         \Magento\Framework\Json\Decoder $jsonDecoder,
+        Json $json,
         array $data = []
     ) {
         parent::__construct($context, $data);
         $this->request = $request;
-
+        $this->id = $this->getId();
         $this->_objectManager = $objectManager;
         $this->apiAddress     = $apiAddress;
         $this->_curlClient    = $curl;
         $this->jsonEncoder    = $jsonEncoder;
         $this->jsonDecoder    = $jsonDecoder;
+        $this->_json = $json;
     }
 
     public function getCurlClient()
@@ -54,7 +73,18 @@ class MediaFeed extends Template {
         return $this->_curlClient;
     }
 
-    public function getMedia() {
+    public function getMediaByCache()
+    {
+        if ($this->_cacheState->isEnabled(Type::TYPE_IDENTIFIER)) {
+            if ($feed = $this->_cache->load($this->id)) {
+                return $this->_json->unserialize($feed);
+            }
+        }
+        return [];
+    }
+
+    public function getMediaByApi()
+    {
         $uid = $this->_objectManager->get(ScopeConfigInterface::class)
             ->getValue(
                 'joshine_instagram_feed/general/user_id',
@@ -80,4 +110,52 @@ class MediaFeed extends Template {
         }
         return $this->jsonDecoder->decode($this->getCurlClient()->getBody());
     }
+
+    public function cacheFeed($feed)
+    {
+        var_dump($this->_cacheState->isEnabled(Type::TYPE_IDENTIFIER));
+        if ($this->_cacheState->isEnabled(Type::TYPE_IDENTIFIER)) {
+            $this->save($feed, $this->id);
+        }
+        return true;
+    }
+
+    public function getId()
+    {
+        try {
+            return base64_encode($this->_storeManager->getStore()->getCode() . Type::TYPE_IDENTIFIER);
+        } catch (NoSuchEntityException $e) {
+            return base64_encode(date('Y-m-d') . Type::TYPE_IDENTIFIER);
+        }
+    }
+
+    public function load($cacheId)
+    {
+        if ($this->_cacheState->isEnabled(Type::TYPE_IDENTIFIER)) {
+            return $this->_cache->load($cacheId) ?: false;
+        }
+
+        return false;
+    }
+
+    public function save($data, $cacheId)
+    {
+        if ($this->_cacheState->isEnabled(Type::TYPE_IDENTIFIER)) {
+            return $this->_cache->save($data, $cacheId, [Type::CACHE_TAG], Type::CACHE_LIFETIME);
+        }
+
+        return false;
+    }
+
+    public function getMedia() {
+        $cache = $this->getMediaByCache();
+        if (!empty($cache)) {
+            return $cache;
+        }
+        $feed = $this->getMediaByApi();
+        if (isset($feed['data'])) {
+            $this->cacheFeed($feed);
+        }
+        return $feed;
+    }
 }
\ No newline at end of file

app/code/Joshine/Review/etc/cache.xml

+<?xml version="1.0"?>
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Cache/etc/cache.xsd">
+    <type name="instagram_feed" translate="label,description" instance="Joshine\InstagramFeed\Model\Cache\Type">
+        <label>Instagram Feed</label>
+        <description>Instagram feed cache.</description>
+    </type>
+</config>