MAGETWO-71954: Expanded ReadInterface #10672

Author: Oleksii Korshenko

app/code/Magento/Email/Model/Template/Config/FileIterator.php

@@ -47,7 +47,6 @@ public function current()
             );
         }
 
-        /** @var \Magento\Framework\Filesystem\File\Read $fileRead */
         $fileRead = $this->fileReadFactory->create($this->key(), DriverPool::FILE);
         $contents = $fileRead->readAll();
         return str_replace('<template ', '<template module="' . $moduleName . '" ', $contents);

app/code/Magento/Translation/Model/Js/DataProvider.php

@@ -103,7 +103,6 @@ public function getData($themePath)
 
         $dictionary = [];
         foreach ($files as $filePath) {
-            /** @var \Magento\Framework\Filesystem\File\Read $read */
             $read = $this->fileReadFactory->create($filePath[0], \Magento\Framework\Filesystem\DriverPool::FILE);
             $content = $read->readAll();
             foreach ($this->getPhrases($content) as $phrase) {

lib/internal/Magento/Framework/Config/FileIterator.php

@@ -66,7 +66,6 @@ public function rewind()
      */
     public function current()
     {
-        /** @var \Magento\Framework\Filesystem\File\Read $fileRead */
         $fileRead = $this->fileReadFactory->create($this->key(), DriverPool::FILE);
         return $fileRead->readAll();
     }

lib/internal/Magento/Framework/Filesystem/File/ReadInterface.php

@@ -19,6 +19,15 @@ interface ReadInterface
      */
     public function read($length);
 
+    /**
+     * Returns the complete content of the file.
+     *
+     * @param string|null $flag
+     * @param resource|null $context
+     * @return string
+     */
+    public function readAll($flag = null, $context = null);
+
     /**
      * Reads the line with specified number of bytes from the current position.
      *