Fuck off, Zuck

2 files changed, 20 insertions, 1 deletions

diff --git a/providers/Facebook.php b/providers/Facebook.php
index 20f5028..384c013 100644
--- a/providers/Facebook.php
+++ b/providers/Facebook.php
@@ -26,7 +26,23 @@ class Facebook extends \Providers\Provider {
              implode(DIRECTORY_SEPARATOR, [dirname(__FILE__), '..', 'bin', 'fb-scrape']) . ' ' .
              'python ' . implode(DIRECTORY_SEPARATOR, [dirname(__FILE__), '..', 'bin', 'fb-scrape', 'get-fb-content.py']) . ' ' .
              escapeshellarg($this->_feed), $jsonContent);
-        return json_decode(implode(PHP_EOL, $jsonContent), TRUE);
+        $cacheFile = sprintf($this->_getCachePath(), $this->_feed);
+        if (file_exists($cacheFile)) {
+            $cache = unserialize($this->_getCache($cacheFile));
+        }
+        else {
+            $cache = [];
+        }
+        $fetched = json_decode(implode(PHP_EOL, $jsonContent), TRUE);
+        $cacheIDs = array_map(function($obj) {
+            return $obj['id'];
+        }, $cache);
+        foreach ($fetched as $fetchedItem) {
+            if (!in_array($fetchedItem['id'], $cacheIDs)) {
+                $cache[] = $fetchedItem;
+            }
+        }
+        return $cache;
     }
 
     protected function _mapItems($content) {
diff --git a/providers/Provider.php b/providers/Provider.php
index 434b1d1..7e7dbf0 100644
--- a/providers/Provider.php
+++ b/providers/Provider.php
@@ -35,6 +35,9 @@ abstract class Provider {
             return unserialize($this->_getCache($cacheFile));
         } else {
             $content = $this->_fetchItems();
+            if (empty($content) && file_exists($cacheFile)) {
+                return unserialize($this->_getCache($cacheFile));
+            }
             file_put_contents($cacheFile, serialize($content));
             $this->_cacheTime = time();
             return $content;