From f95150f6a9569fabcb31f3acd9f6b7bf50b5d145 Mon Sep 17 00:00:00 2001
From: Daniel Gasienica <daniel@gasienica.ch>
Date: Tue, 13 Feb 2018 11:17:30 -0500
Subject: [PATCH] Revert "Replace custom functions with `blob-util`"

This reverts commit 8a81e9c01bfe80c0e1bf76737092206c06949512.
---
 js/modules/types/attachment.js | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/js/modules/types/attachment.js b/js/modules/types/attachment.js
index f32a21e308..34a374bfa1 100644
--- a/js/modules/types/attachment.js
+++ b/js/modules/types/attachment.js
@@ -2,7 +2,6 @@
 
 const dataURLToBlob = require('blueimp-canvas-to-blob');
 const MIME = require('./mime');
-const { arrayBufferToBlob, blobToArrayBuffer } = require('blob-util');
 const { autoOrientImage } = require('../auto_orient_image');
 
 // Increment this everytime we change how attachments are processed. This allows us to
@@ -24,6 +23,26 @@ const CURRENT_PROCESS_VERSION = 1;
 //   data: ArrayBuffer
 // }
 
+// Data type conversion
+const blobToArrayBuffer = blob =>
+  new Promise((resolve, reject) => {
+    const fileReader = new FileReader();
+
+    fileReader.onload = event =>
+      resolve(event.target.result);
+
+    fileReader.onerror = (event) => {
+      const error = new Error('blobToArrayBuffer: Failed to convert blob');
+      error.cause = event;
+      reject(error);
+    };
+
+    fileReader.readAsArrayBuffer(blob);
+  });
+
+const arrayBufferToBlob = (arrayBuffer, mimeType) =>
+  new Blob([arrayBuffer], { type: mimeType });
+
 // Middleware
 // type ProcessingStep = Attachment -> Promise Attachment