refactor: loadCacheValue/saveCacheValue (#4205)

bridges/BugzillaBridge.php

@@ -164,7 +164,7 @@ class BugzillaBridge extends BridgeAbstract
         }
 
         $cache = $this->loadCacheValue($this->instance . $user);
-        if (!is_null($cache)) {
+        if ($cache) {
             return $cache;
         }
 

bridges/FurAffinityBridge.php

@@ -676,7 +676,7 @@ class FurAffinityBridge extends BridgeAbstract
                 $name = parent::getName();
                 if ($this->getOption('aCookie') !== null) {
                     $username = $this->loadCacheValue('username');
-                    if ($username !== null) {
+                    if ($username) {
                         $name = $username . '\'s ' . parent::getName();
                     }
                 }

bridges/ItakuBridge.php

@@ -667,7 +667,7 @@ class ItakuBridge extends BridgeAbstract
         if ($getJSON) { //get JSON object
             if ($cache) {
                 $data = $this->loadCacheValue($url);
-                if (is_null($data)) {
+                if (!$data) {
                     $data = getContents($url, $httpHeaders, $curlOptions);
                     $this->saveCacheValue($url, $data);
                 }

bridges/MastodonBridge.php

@@ -105,7 +105,7 @@ class MastodonBridge extends BridgeAbstract
                         break;
                     }
                     $rtUser = $this->loadCacheValue($rtContent['attributedTo']);
-                    if (!isset($rtUser)) {
+                    if (!$rtUser) {
                         // We fetch the author, since we cannot always assume the format of the URL.
                         $user = $this->fetchAP($rtContent['attributedTo']);
                         preg_match('/https?:\/\/([a-z0-9-\.]{0,})\//', $rtContent['attributedTo'], $matches);

bridges/PixivBridge.php

@@ -314,7 +314,7 @@ class PixivBridge extends BridgeAbstract
     {
         // checks if cookie is set, if not initialise it with the cookie from the config
         $value = $this->loadCacheValue('cookie');
-        if (!isset($value)) {
+        if (!$value) {
             $value = $this->getOption('cookie');
 
             // 30 days + 1 day to let cookie chance to renew

bridges/WordPressMadaraBridge.php

@@ -118,7 +118,7 @@ The default URI shows the Madara demo page.';
     {
         $url_cache = 'TitleInfo_' . preg_replace('/[^\w]/', '.', rtrim($url, '/'));
         $cache = $this->loadCacheValue($url_cache);
-        if (isset($cache)) {
+        if ($cache) {
             return $cache;
         }