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'use strict';

import path from 'path';

import gulp from 'gulp';

import uglify from 'gulp-uglify';

import cleanCSS from 'gulp-clean-css';

import autoprefixer from 'gulp-autoprefixer';

import concat from 'gulp-concat';

import header from 'gulp-header';

import babel from 'gulp-babel';

import gutil from 'gulp-util';

import sourcemaps from 'gulp-sourcemaps';

import connect from 'gulp-connect';

import browserify from 'browserify';

import babelify from 'babelify';

import source from 'vinyl-source-stream';

import buffer from 'vinyl-buffer';

import pkg from './package.json';

const appName = 'algorithm_visualizer';

const appEntryPoint = './js/index.js';

const outputPaths = {

javascript: './public',

css: './public',

sourceMaps: './'

};

const banner = [

'/**',

' * <%= pkg.name %> - <%= pkg.description %>',

' * @version v<%= pkg.version %>',

' * @author <%= pkg.author %>',

' * @link <%= pkg.homepage %>',

' * @license <%= pkg.license %>',

' */',

].join('\n');

// build directories

const cssDir = path.join(__dirname, 'css', '**', '*.css');

const jsDir = path.join(__dirname, 'js', '**', '*.js');

// CSS

gulp.task('minify-css', () => {

gutil.log('\n\nBuild CSS Paths: \n', cssDir, '\n\n');

return gulp.src(cssDir)

.pipe(autoprefixer())

.pipe(cleanCSS({

compatibility: 'ie8'

}))

.pipe(concat(`${appName}.min.css`))

.pipe(header(banner, {

pkg

}))

.pipe(gulp.dest(outputPaths.css))

.pipe(connect.reload());

});

gulp.task('build-css', () => {

gutil.log('\n\nBuild CSS Paths: \n', cssDir, '\n\n');

return gulp.src(cssDir)

.pipe(autoprefixer())

.pipe(concat(`${appName}.css`))

.pipe(header(banner, {

pkg

}))

.pipe(gulp.dest(outputPaths.css))

.pipe(connect.reload());

});

// JS

gulp.task('minify-js', () => {

gutil.log('\n\nBuild JS Paths: \n', jsDir, '\n\n');

return browserify({

entries: './js/index.js',

debug: true

})

.transform('babelify', {

presets: ['es2015']

})

.bundle()

.pipe(source(`${appName}.min.js`))

.pipe(header(banner, {

pkg

}))

.pipe(buffer())

.pipe(sourcemaps.init())

.pipe(uglify())

.pipe(sourcemaps.write(outputPaths.sourceMaps))

.pipe(gulp.dest(outputPaths.javascript))

.pipe(connect.reload());

});

gulp.task('build-js', () => {

gutil.log('\n\nBuild JS Paths: \n', jsDir, '\n\n');

return browserify({

entries: './js/index.js',

debug: true

})

.transform('babelify', {

presets: ['es2015']

})

.bundle()

.pipe(source(`${appName}.js`))

.pipe(header(banner, {

pkg

}))

.pipe(buffer())

.pipe(sourcemaps.init())

.pipe(sourcemaps.write(outputPaths.sourceMaps))

.pipe(gulp.dest(outputPaths.javascript))

.pipe(connect.reload());

});

// Build

gulp.task('compile-css', ['build-css', 'minify-css']);

gulp.task('compile-js', ['build-js', 'minify-js']);

gulp.task('build', ['compile-css', 'compile-js']);

// Server

gulp.task('connect', function() {

connect.server({

livereload: true

});

// Watch

gulp.task('watch', ['build'], function() {

gulp.watch(jsDir, ['compile-js']);

gulp.watch(cssDir, ['compile-css']);

});

// Default

gulp.task('default', ['connect', 'watch']);