/*
 * imagify-gulpjs - version 0.0.1 - 2017-07-28
 * WP Media <contact@wp-media.me>
 */
'use strict';

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

var ImagifyGulp = function () {
	function ImagifyGulp(settings) {
		_classCallCheck(this, ImagifyGulp);

		this.buffer_size = settings.buffer_size || 1;
		this.lib_url = settings.lib;
		this.default_thumb = "data:image/png;base64,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";
		this.images = settings.images;
		this.images_ids = Object.keys(settings.images);
		this.total_images = this.images_ids.length;
		this.processed_images = 0;
		this.inprocess_images = 0;
		this._before = new Function();
		this._each = new Function();
		this._done = new Function();
		this._error = new Function();
		this.global_original_size = 0;
		this.global_optimized_size = 0;
		this.global_gain = 0;
		this.global_percent = 0;
		this.context = settings.context || 'wp';
	}

	_createClass(ImagifyGulp, [{
		key: 'before',
		value: function before(fnc) {
			this._before = fnc;
			return this;
		}
	}, {
		key: 'each',
		value: function each(fnc) {
			this._each = fnc;
			return this;
		}
	}, {
		key: 'done',
		value: function done(fnc) {
			this._done = fnc;
			return this;
		}
	}, {
		key: 'error',
		value: function error(fnc) {
			this._error = fnc;
			return this;
		}
	}, {
		key: 'humanSize',
		value: function humanSize(bytes) {
			if (0 === bytes) return '0\xA0kB';

			var sizes = ['B', 'kB', 'MB'],
			    i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)), 10);

			return (bytes / Math.pow(1024, i)).toFixed(2) + '\xA0' + sizes[i];
		}
	}, {
		key: 'run',
		value: function run() {
			var cpt = this.images_ids.length > this.buffer_size ? this.buffer_size : this.images_ids.length;

			for (var i = 0; i < cpt; i++) {
				var id = this.images_ids.shift();
				this.process(id);
			}

			return this;
		}
	}, {
		key: 'stopProcess',
		value: function stopProcess() {
			this.total_images = this.total_images - this.images_ids.length;
			this.images_ids = [];
			return this;
		}
	}, {
		key: 'process',
		value: function process(id) {
			this.inprocess_images++;

			var data = {
				id: id,
				image_id: parseInt(id.toString().substr(1), 10),
				image_src: this.images[id],
				filename: this.images[id].split('/').pop(),
				thumbnail: this.default_thumb,
				error: ''
			};

			this.createThumb(data);
		}
	}, {
		key: 'createThumb',
		value: function createThumb(data) {
			var self = this,
			    image = new Image();

			image.onerror = function () {
				var data_before = data;
				data_before.id = data.image_id;

				self._before(data_before);
				self.send(data);
			};

			image.onload = function () {
				var maxWidth = 33,
				    maxHeight = 33,
				    imageWidth = image.width,
				    imageHeight = image.height,
				    ratio = 1,
				    newHeight = 0,
				    newWidth = 0,
				    canvas = null,
				    ctx = null;

				if (imageWidth < imageHeight) {
					ratio = maxWidth / imageWidth;
					newWidth = maxWidth;
					newHeight = imageHeight * ratio;
				} else {
					ratio = maxHeight / imageHeight;
					newHeight = maxHeight;
					newWidth = imageWidth * ratio;
				}

				canvas = document.createElement('canvas');

				canvas.width = newWidth;
				canvas.height = newHeight;
				image.width = newWidth;
				image.height = newHeight;

				ctx = canvas.getContext('2d');
				ctx.drawImage(this, 0, 0, newWidth, newHeight);

				try {
					data.thumbnail = canvas.toDataURL('image/jpeg');
				} catch (e) {
					data.thumbnail = self.default_thumb;
				}

				var before_data = data;
				before_data.id = data.image_id;

				self._before(before_data);

				self.send(data);

				canvas = null;
			};

			image.src = data.image_src;
		}
	}, {
		key: 'send',
		value: function send(data) {

			var self      = this,
				transport = new XMLHttpRequest(),
				err       = false,
				json      = {},
				response  = {
					id:        data.id,
					image:     data.image_id,
					filename:  data.filename,
					thumbnail: data.thumbnail,
					error:     ''
				};

			transport.onreadystatechange = function () {
				if (4 === this.readyState) {

					self.processed_images++;

					try {
						json = JSON.parse(this.responseText);
						err = false;
					} catch (e) {

						response.success = false;
						response.error = 'Unknown error occured';

						err = true;
					}

					response.progress = Math.floor(self.processed_images / self.total_images * 100);

					if (!err) {
						var json_data = json.data;

						response.success = json.success;

						if (true === json.success) {
							self.global_original_size  += json_data.original_overall_size;
							self.global_optimized_size += json_data.new_overall_size;
							self.global_gain           += json_data.overall_saving;
							self.global_percent         = ( 100 - self.global_optimized_size / self.global_optimized_size * 100 ).toFixed( 2 );

							response.original_size_human         = json_data.original_size_human;
							response.new_size_human              = json_data.new_size_human;
							response.overall_saving_human        = json_data.overall_saving_human;
							response.original_overall_size_human = json_data.original_overall_size_human;
							response.percent_human               = json_data.percent_human;
							response.thumbnails                  = json_data.thumbnails;
						} else {
							response.error_code = json_data.error_code;
							response.error      = json_data.error;
						}
					}

					self._each(response);

					if (self.inprocess_images < self.total_images) {
						self.process(self.images_ids.shift());
					}

					if ( self.processed_images === self.total_images ) {
						self._done( {
							global_original_size:  self.global_original_size,
							global_optimized_size: self.global_optimized_size,
							global_gain:           self.global_gain
						} );
					}
				}
			};

			transport.open('POST', this.lib_url, true);
			transport.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			transport.send('image=' + data.image_id + '&context=' + this.context);
		}
	}]);

	return ImagifyGulp;
}();
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