* Move from Buffer to Text Decoder/Encoder

* Fixed #18 issue
* Updated README.md

README.md

@@ -51,9 +51,9 @@ The program works in two modes, encrypt and decrypt messages.
 To encrypt a message use one of the following commands:
 
 ```sh
-$ stegjs img.png -e 'Meeting tonight at midnight under the light.' 5x5
-$ stegjs https://google.com/img.png -e 'Xod(}bgwh2^j7>B8X' 1x1 ./secrets/go.png
-$ stegjs nyan.png -e '🐱' 2x1
+$ npx stegjs img.png -e "Meeting tonight at midnight under the light." 5x5
+$ npx stegjs https://upload.wikimedia.org/wikipedia/commons/4/47/PNG_transparency_demonstration_1.png -e "my_secret_pass" 1x1 ./secrets/go.png
+$ npx stegjs nyan.png -e "🐱" 2x1
 ```
 
 After that in the console, you will see the full path to the output image, message and pattern.
@@ -71,7 +71,7 @@ To receive an encrypted message, specify the path to the image with the secret m
 
 
 ```sh
-$ stegjs out.png -d
+$ npx stegjs out.png -d
 ```
 
 After that in the console, you will see the information contained in the encrypted image.

package.json

@@ -1,9 +1,9 @@
 {
   "name": "stegjs",
-  "version": "2.0.4",
+  "version": "2.0.6",
   "description": "Encrypt message to PNG image.",
-  "main": "lib/index.js",
-  "types": "lib",
+  "main": "lib/src/index.js",
+  "types": "lib/src",
   "scripts": {
     "lint": "eslint . --ext .ts",
     "build": "rimraf ./lib && tsc -p . --sourcemap",
@@ -19,7 +19,7 @@
     "test:dev": "jest --watchAll --coverage --detectOpenHandles"
   },
   "bin": {
-    "stegjs": "lib/index.js"
+    "stegjs": "lib/src/index.js"
   },
   "husky": {
     "hooks": {

src/converters.ts

@@ -1,13 +1,15 @@
+import { TextDecoder, TextEncoder } from 'util';
+
 /**
  * The function converts string into an array of bits.
  * @param str
  * @returns {Array}
  */
 export const stringToBits = (str: string): boolean[] => {
   // Make a new buffer, based on our incoming message.
-  const buffer = Buffer.from(str);
+  const buffer = new TextEncoder().encode(str);
 
-  // Let's make an array of bits, based on each
+  // Let's make an array of bits, based on each byte in the buffer.
   const bitarray = [];
 
   for (let i = 0; i < buffer.length; i++) {
@@ -32,7 +34,7 @@ export const stringToBits = (str: string): boolean[] => {
  * @returns {string|String}
  */
 export const bitsToString = (bits: number[]): string => {
-  const buf = Buffer.alloc(bits.length / 8);
+  const buf = new Uint8Array(bits.length / 8);
   let byteID = -1;
 
   let myBytes = [];
@@ -59,7 +61,7 @@ export const bitsToString = (bits: number[]): string => {
       myBytes = [];
     }
   }
-  return buf.toString();
+  return new TextDecoder().decode(buf);
 };
 
 /**

src/index.spec.ts

@@ -10,7 +10,7 @@ describe('Main Functionality', () => {
       `ts-node ${join(__dirname, 'index.ts')} --version`,
     );
     expect(stderr).toEqual('');
-    expect(stdout).toEqual('2.0.4\n');
+    expect(stdout).toEqual('2.0.6\n');
   });
   it('prints StegJS help information', async () => {
     const { stdout, stderr } = await exec(

src/index.ts

@@ -9,7 +9,7 @@
  Have the option of writing a message into the image by pattern –
  distance between the bits of the message.
 
- Also the program can get the message
+ Also, the program can get the message
  from already encoded PNG image.
 
  A program developed by Andrey Medvedev in 2016.
@@ -67,12 +67,14 @@ program.on('--help', () => {
 });
 
 /** The arguments passed by the program. */
-program.action((image, message, step, output) => {
-  imageValue = image;
-  messageValue = message;
-  stepValue = step;
-  outputValue = output;
-});
+program.action(
+  (image: string, message: string, step: string, output: string) => {
+    imageValue = image;
+    messageValue = message;
+    stepValue = step;
+    outputValue = output;
+  },
+);
 
 /** Parse arguments that come into the program. */
 program.parse(process.argv);
@@ -88,7 +90,7 @@ if (typeof imageValue === 'undefined') {
 /** If user does not specify output path, then throw output image to the current folder with name out.png */
 outputValue = outputValue || join(process.cwd(), '/out.png');
 
-/** Branching according of the program mode. */
+/** Branching according to the program mode. */
 if (program.opts()['encode']) {
   encode(imageValue, messageValue, stepValue, outputValue);
 }