lab-04-allan-andy-jonah

.eslintignore

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+**/node_modules/*
+**/vendor/*
+**/*.min.js
+**/coverage/*
+**/build/*

.eslintrc

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+{
+    "rules": {
+        "no-console": "off",
+        "indent": ["error", 2],
+        "quotes": ["error", "single"],
+        "semi": ["error", "always"],
+        "linebreak-style": ["error", "unix"]
+    },
+    "env": {
+        "es6": true,
+        "node": true,
+        "mocha": true,
+        "jasmine": true
+    },
+    "parserOptions": {
+        "ecmaFeatures": {
+            "modules": true,
+            "experimentalObjectRestSpread": true,
+            "impliedStrict": true
+        }
+    },
+    "extends": "eslint:recommended"
+}

.gitignore

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+
+# Created by https://www.gitignore.io/api/node,macos,linux,windows
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### macOS ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+
+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+ehthumbs.db
+ehthumbs_vista.db
+
+# Folder config file
+Desktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# End of https://www.gitignore.io/api/node,macos,linux,windows

README.md

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-![CF](https://camo.githubusercontent.com/70edab54bba80edb7493cad3135e9606781cbb6b/687474703a2f2f692e696d6775722e636f6d2f377635415363382e706e67) Lab 04: Bitmap Transformer
-===
+# Bitmap Transformer
 
-## To Submit this Assignment
-* have team leader fork this repository
-* have team leader add team members as collaborators to the team fork
-* team members should clone team fork
-* write all of your code in a directory name `bitmap-` + `<team name>` **e.g.** `bitmap-weasels`
-* submit a pull request to this repository when done
-* each person will submit a link to their own PR in canvas
-* each person write a question and observation on canvas
+This application takes a bit map image and applies four transformations to it, creating four additional files in the assets directory.
 
-## Learning Objectives  
-* students will be able to manipulate binary data using the node.js `Buffer` class
-* students will be able to architect modular solutions to solving problems
+  - Greyscale
+  - Infared
+  - Inverted Color
+  - Reversed (a flipped image)
 
-## Resources  
-* [Bitmap Specification](https://en.wikipedia.org/wiki/BMP_file_format)
-* [NodeJS Buffer docs](https://nodejs.org/api/buffer.html)
+# Run it!
 
-#### Feature Tasks
-
-For this assignment you will be building a bitmap (`.bmp`) reader and transformer. It will read a bitmap in from disk, run one or more color transforms on the bitmap and then write it out to a new file. This project will require the use of node buffers in order to manipulate binary data. Your project should include tests, as well as a `package.json`, `.eslintrc`, `README.md`, and a `.gitignore`. Make sure to run all your code through eslint. The process will look something like this:
-
-1. open the original bitmap file using fs and read it into a buffer
-2. convert the buffer header data into a Javascript Object (using constructors)
-3. run a transform on the buffer directly
-4. write the buffer to a new file
-
-The wikipedia article found here [Bitmap Specification](https://en.wikipedia.org/wiki/BMP_file_format) describes the byte specification of a "windows bitmap file." We'll be working with the simplest version, meaning no compression.
-
-* your project should have three ***(or more)*** transforms
-* invert the colors (***hint:*** subtract every color value from the max color value which is 255),
-* grayscale the colors (***hint:*** multiply each color value by a constant, just make sure your values don't go over 255)
-* (red|green|blue)scale the colors (***hint:*** same as above but only multiply one of the colors)
-
-#### Bonus:
-* ability to handle various sized bitmap
-* ability to handle LE and BE computers with a single if statement
-* utilizes a command line interface (CLI)
-* CLI can select the transforms
-
-#### Suggested Directory Structure (this is optional):
-* suggested directory structure:
-  - **index.js**
-  - **lib**
-    - bitmap file helper
-  - **model**
-    - bitmap constructor
-    - color constructor
-  - **test**
-    - bitmap file helper test
-    - bitmap constructor test
-    - color constructor test
-
-#### Rubric:
-* **tests:** 3pts
-* **package.json:** 2pts
-* **read bitmap meta data:** 5pts
-* **successfully apply transforms:** 5pts
-* **project design and organization:** 5pts
+  - open the file in the terminal
+  - navigate to the Lib directory
+  - run the command node bitmap-file-helper.js
+  - At this point you'll have 4 new files in your assets directory.

index.js

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+'use strict';
+
+const bitmapFileHelper = require(`${__dirname}/lib/bitmap-file-helper.js`);
+const bitmapConstructor = require(`${__dirname}/model/bitmap-constructor.js`);
+const greyScaleTransform = require(`${__dirname}/lib/grey-scale-transform.js`);
+const reverseTransform = require(`${__dirname}/lib/reverse-transform.js`);
+const invertTransform = require(`${__dirname}/lib/invert-transform.js`);
+const infraredTransform = require(`${__dirname}/lib/infrared-transform.js`);
+
+
+bitmapFileHelper(`${__dirname}/assets/palette-bitmap.bmp`, function(err, data) {
+  if(err) throw err;
+  let bmp = new bitmapConstructor.Bitmap(data);
+
+  bmp.colorArr = greyScaleTransform(bmp.colorArr);
+  bmp.newFile('greyscaled');
+});
+
+bitmapFileHelper(`${__dirname}/assets/palette-bitmap.bmp`, function(err, data) {
+  if(err) throw err;
+  let bmp = new bitmapConstructor.Bitmap(data);
+
+  bmp.pixelArr = reverseTransform(bmp.pixelArr);
+  bmp.newFile('reversed');
+});
+
+
+bitmapFileHelper(`${__dirname}/assets/palette-bitmap.bmp`, function(err, data) {
+  if(err) throw err;
+  let bmp = new bitmapConstructor.Bitmap(data);
+
+  bmp.colorArr = invertTransform(bmp.colorArr);
+  bmp.newFile('inverted');
+});
+
+bitmapFileHelper(`${__dirname}/assets/palette-bitmap.bmp`, function(err, data) {
+  if(err) throw err;
+  let bmp = new bitmapConstructor.Bitmap(data);
+
+  bmp.colorArr = infraredTransform(bmp.colorArr);
+  bmp.newFile('infrared');
+});

lib/bitmap-file-helper.js

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+'use strict';
+
+const fs = require('fs');
+
+const bitmapFileHelper = module.exports = function(file, callback) {
+  fs.readFile(file, function(err, data) {
+    if (err) return callback(err);
+    return callback(null, data);
+  });
+};

lib/grey-scale-transform.js

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+'use strict';
+
+module.exports = exports = function greyScale(colorArrayText) {
+  let colorArray = colorArrayText.match(/.{1,8}/g);
+  let greyArray = [];
+
+  colorArray.forEach(function(n) {
+    let pairsArray = n.match(/.{1,2}/g);
+    let b = parseInt(pairsArray[0],16); //hex value to decimal value;
+    let g = parseInt(pairsArray[1],16);
+    let r = parseInt(pairsArray[2],16);
+    var avg = Math.floor((Math.max(r,g,b) + Math.min(r,g,b)) / 2);
+    pairsArray[0] = avg.toString(16);
+    pairsArray[1] = avg.toString(16);
+    pairsArray[2] = avg.toString(16);
+    pairsArray.forEach(function(value, i){
+      if(value.length === 1){
+        pairsArray[i] = '0' + pairsArray[i];
+      }
+    });
+    let greyHex = pairsArray.join('');
+    greyArray.push(greyHex);
+  });
+
+  let greyColorArrayText = greyArray.join('');
+  return greyColorArrayText;
+};

lib/infrared-transform.js

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+'use strict';
+
+module.exports = exports = function greyScale(colorArrayText) {
+  let colorArray = colorArrayText.match(/.{1,8}/g);
+  let greyArray = [];
+
+  colorArray.forEach(function(n) {
+    let pairsArray = n.match(/.{1,2}/g);
+    let b = parseInt(pairsArray[0],16); //hex value to decimal value;
+    let g = parseInt(pairsArray[1],16);
+    let r = parseInt(pairsArray[2],16);
+    var avg = Math.floor((Math.max(r,g,b) + Math.min(r,g,b)) / 2);
+    pairsArray[0] = avg.toString(16);
+    pairsArray[1] = avg.toString(16);
+    pairsArray[2] = (255).toString(16);
+    pairsArray.forEach(function(value, i){
+      if(value.length === 1){
+        pairsArray[i] = '0' + pairsArray[i];
+      }
+    });
+    let greyHex = pairsArray.join('');
+    greyArray.push(greyHex);
+  });
+
+  let greyColorArrayText = greyArray.join('');
+  return greyColorArrayText;
+};

lib/invert-transform.js

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+'use strict';
+
+module.exports = exports = function invertColor(colorArrayText){
+  let colorArray = colorArrayText.match(/.{1,8}/g);
+  let invertedColorArray = [];
+
+  colorArray.forEach(function(n) {
+    let invertArray = [];
+    let pairsArray = n.match(/.{1,2}/g);
+    let b = parseInt(pairsArray[0],16); //hex value to decimal value;
+    let g = parseInt(pairsArray[1],16);
+    let r = parseInt(pairsArray[2],16);
+    let bInvert = (255-b).toString(16); // invert ;
+    let gInvert = (255-g).toString(16);
+    let rInvert = (255-r).toString(16);
+
+    invertArray.push(bInvert, gInvert, rInvert, '00');
+    invertArray.forEach(function(value, i){
+      if(value.length === 1){
+        invertArray[i] = '0'+invertArray[i];
+      }
+    });
+    invertedColorArray.push(invertArray.join(''));
+  });
+
+  let invertedColorString = invertedColorArray.join('');
+  return invertedColorString;
+};

lib/reverse-transform.js

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+'use strict';
+
+module.exports = exports = function reverser(pixelArrayText) {
+  let pixelArray = pixelArrayText.match(/.{1,2}/g);
+  let reversed = pixelArray.reverse().join('');
+
+  return reversed;
+};