From b9732d7d1055c03fb353254b32a30b154234be67 Mon Sep 17 00:00:00 2001
From: Eric COURTIAL <e.courtial30@gmail.com>
Date: Mon, 9 Apr 2018 19:46:39 -0400
Subject: [PATCH 1/3] Added possibility to select PHP input file mode

---
 lib/internal/Magento/Framework/File/Csv.php | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/lib/internal/Magento/Framework/File/Csv.php b/lib/internal/Magento/Framework/File/Csv.php
index 3d177f89e2968..67177445a670d 100644
--- a/lib/internal/Magento/Framework/File/Csv.php
+++ b/lib/internal/Magento/Framework/File/Csv.php
@@ -126,13 +126,17 @@ public function getDataPairs($file, $keyIndex = 0, $valueIndex = 1)
     /**
      * Saving data row array into file
      *
-     * @param   string $file
-     * @param   array $data
-     * @return  $this
+     * @param string $file
+     * @param array $data
+     * @param string $mode
+     *
+     * @return $this
+     *
+     * @throws \Magento\Framework\Exception\FileSystemException
      */
-    public function saveData($file, $data)
+    public function saveData($file, $data, $mode = 'w')
     {
-        $fh = fopen($file, 'w');
+        $fh = fopen($file, $mode);
         foreach ($data as $dataRow) {
             $this->file->filePutCsv($fh, $dataRow, $this->_delimiter, $this->_enclosure);
         }

From 68e087843fbb17a2c3de1ed4ecd2c380feab8640 Mon Sep 17 00:00:00 2001
From: Eric COURTIAL <e.courtial30@gmail.com>
Date: Wed, 11 Apr 2018 19:11:17 -0400
Subject: [PATCH 2/3] Added a new method to replace the saveData one

---
 lib/internal/Magento/Framework/File/Csv.php | 34 +++++++++++++++++----
 1 file changed, 28 insertions(+), 6 deletions(-)

diff --git a/lib/internal/Magento/Framework/File/Csv.php b/lib/internal/Magento/Framework/File/Csv.php
index 67177445a670d..10ee9b193d543 100644
--- a/lib/internal/Magento/Framework/File/Csv.php
+++ b/lib/internal/Magento/Framework/File/Csv.php
@@ -126,21 +126,43 @@ public function getDataPairs($file, $keyIndex = 0, $valueIndex = 1)
     /**
      * Saving data row array into file
      *
-     * @param string $file
-     * @param array $data
+     * @param   string $file
+     * @param   array $data
+     * @return  $this
+     * @throws \Magento\Framework\Exception\FileSystemException
+     * @deprecated
+     * @see appendData
+     */
+    public function saveData($file, $data)
+    {
+        $fh = fopen($file, 'w');
+        foreach ($data as $dataRow) {
+            $this->file->filePutCsv($fh, $dataRow, $this->_delimiter, $this->_enclosure);
+        }
+        fclose($fh);
+        return $this;
+    }
+
+    /**
+     * Replace the saveData method by
+     * allowing to select the input mode
+     *
+     * @param $file
+     * @param $data
      * @param string $mode
      *
      * @return $this
      *
      * @throws \Magento\Framework\Exception\FileSystemException
      */
-    public function saveData($file, $data, $mode = 'w')
+    public function appendData($file, $data, $mode = 'w')
     {
-        $fh = fopen($file, $mode);
+        $fileHandler = fopen($file, $mode);
         foreach ($data as $dataRow) {
-            $this->file->filePutCsv($fh, $dataRow, $this->_delimiter, $this->_enclosure);
+            $this->file->filePutCsv($fileHandler, $dataRow, $this->_delimiter, $this->_enclosure);
         }
-        fclose($fh);
+        fclose($fileHandler);
+
         return $this;
     }
 }

From 9e01479c24c8658ed648a12f6bf69a1ccd0a7450 Mon Sep 17 00:00:00 2001
From: Stanislav Idolov <sidolov@magento.com>
Date: Thu, 3 May 2018 12:03:09 +0300
Subject: [PATCH 3/3] Refactored code for avoiding copy/paste

---
 lib/internal/Magento/Framework/File/Csv.php | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/lib/internal/Magento/Framework/File/Csv.php b/lib/internal/Magento/Framework/File/Csv.php
index 10ee9b193d543..571ad6b21efa7 100644
--- a/lib/internal/Magento/Framework/File/Csv.php
+++ b/lib/internal/Magento/Framework/File/Csv.php
@@ -126,29 +126,23 @@ public function getDataPairs($file, $keyIndex = 0, $valueIndex = 1)
     /**
      * Saving data row array into file
      *
-     * @param   string $file
-     * @param   array $data
-     * @return  $this
+     * @param string $file
+     * @param array $data
+     * @return $this
      * @throws \Magento\Framework\Exception\FileSystemException
      * @deprecated
      * @see appendData
      */
     public function saveData($file, $data)
     {
-        $fh = fopen($file, 'w');
-        foreach ($data as $dataRow) {
-            $this->file->filePutCsv($fh, $dataRow, $this->_delimiter, $this->_enclosure);
-        }
-        fclose($fh);
-        return $this;
+        return $this->appendData($file, $data, 'w');
     }
 
     /**
-     * Replace the saveData method by
-     * allowing to select the input mode
+     * Replace the saveData method by allowing to select the input mode
      *
-     * @param $file
-     * @param $data
+     * @param string $file
+     * @param array $data
      * @param string $mode
      *
      * @return $this