Exclude streamifier dependancy

lib/utilities.js

@@ -2,8 +2,7 @@
 
 const fs = require('fs');
 const path = require('path');
-const streamifier = require('streamifier');
-
+const Readable = require('stream').Readable;
 
 /**
  * Returns true if argument is function.
@@ -50,7 +49,7 @@ const copyFile = function(src, dst, callback){
     runCb(err);
   });
   writable.on('close', () => runCb());
-  //Copieng file via piping streams.
+  //Copy file via piping streams.
   readable.pipe(writable);
 };
 
@@ -64,10 +63,19 @@ const saveBufferToFile = function(buffer, filePath, callback){
     callback(new Error('buffer variable should be a Buffer!'));
     return;
   }
-  const fstream = fs.createWriteStream(filePath);
-  streamifier.createReadStream(buffer).pipe(fstream);
+  //Setup readable stream from buffer.
+  let streamData = buffer;
+  let readStream = Readable();
+  readStream._read = ()=>{
+    readStream.push(streamData);
+    streamData = null;
+  };
+  //Setup file system writable stream.
+  let fstream = fs.createWriteStream(filePath);
   fstream.on('error', error => callback(error));
   fstream.on('close', () => callback());
+  //Copy file via piping streams.
+  readStream.pipe(fstream);
 };
 
 module.exports = {