refactor: Apply PHP7.0 sets

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

lib/Cache/Cache.php

@@ -230,7 +230,7 @@ class Cache extends Horde_Imap_Client_Cache_Backend {
 	 * @return void
 	 */
 	public function setMetaData($mailbox, $data) {
-		$this->_loadSliceMap($mailbox, isset($data['uidvalid']) ? $data['uidvalid'] : null);
+		$this->_loadSliceMap($mailbox, $data['uidvalid'] ?? null);
 		$this->_slicemap[$mailbox]['d'] = array_merge($this->_slicemap[$mailbox]['d'], $data);
 		$this->_toUpdate($mailbox, 'slicemap', true);
 	}

lib/Service/AiIntegrations/Cache.php

@@ -55,7 +55,7 @@ class Cache {
 	 * @return void
 	 */
 	public function addValue(string $key, ?string $value): void {
-		$this->cache->set($key, $value === null ? false : $value, self::CACHE_TTL);
+		$this->cache->set($key, $value ?? false, self::CACHE_TTL);
 	}
 
 

lib/Service/Attachment/UploadedFile.php

@@ -24,20 +24,20 @@ class UploadedFile {
 	 * @return string|null
 	 */
 	public function getFileName() {
-		return isset($this->fileData['name']) ? $this->fileData['name'] : null;
+		return $this->fileData['name'] ?? null;
 	}
 
 	/**
 	 * @return string|null
 	 */
 	public function getTempPath() {
-		return isset($this->fileData['tmp_name']) ? $this->fileData['tmp_name'] : null;
+		return $this->fileData['tmp_name'] ?? null;
 	}
 
 	/**
 	 * @return string
 	 */
 	public function getMimeType() {
-		return isset($this->fileData['type']) ? $this->fileData['type'] : 'application/octet-stream';
+		return $this->fileData['type'] ?? 'application/octet-stream';
 	}
 }

rector.php

@@ -22,5 +22,5 @@ return RectorConfig::configure()
 		phpunit: true,
 	)
 	->withPhpSets(
-		php55: true,
+		php70: true,
 	);