Light12306/Web12306/js/utility.js

define(function (require, exports, module) {
	exports.trimToDay = function (d) {
		d = d || new Date();
		if (!(d instanceof Date)) {
			d = new Date(d + '');
		}

		return new Date(d.getFullYear(), d.getMonth(), d.getDate());
	};
	/**
	 * 格式化数字显示
	 * @param {number} number 要格式化的数字
	 * @param {number} digits 要保留的数字位数
	 */
	exports.formatNumber = function (number, digits) {
		digits = digits || 2;

		var str = '' + Math.round(number * (10 ^ digits)) / (10 ^ digits);
		var fc = digits;
		var idx = str.indexOf(".");
		if (idx != -1) fc = digits - str.length - idx - 1;
		else str += ".";

		var ab = [];
		for (var i = 0; i < fc; i++) {
			ab.push("0");
		}

		return str + ab.join("");

	};
	//exports.addDays = function (date, days) {
	//	var x = new Date();
	//	x.setTime(date.getTime() - date.getTime() % (1000 * 3600 * 24) + 1000 * 3600 * 24 * days);
	//	return x;
	//};
	exports.addDays = function (date, offset) {
		date = exports.toDate(date);
		return new Date(date.getFullYear(), date.getMonth(), date.getDate() + offset);
	};
	exports.addMonths = function (date, offset) {
		date = exports.toDate(date);
		return new Date(date.getFullYear(), date.getMonth() + offset, date.getDate());
	};
	exports.toDate = function (date) {
		if (date instanceof Date)
			return date;

		var time = Date.parse(date);
		if (isNaN(time))
			return null;
		return new Date(time);
	};
	exports.formatDate = function (date, format) {
		/// <summary>格式化指定日期</summary>
		/// <param name="format" type="String">格式化字符串</param>
		if (!date)
			return "";

		date = exports.toDate(date);

		format = format || "yyyy-MM-dd";
		var o = {
			"M+": date.getMonth() + 1, //month
			"d+": date.getDate(), //day
			"h+": date.getHours(), //hour
			"m+": date.getMinutes(), //minute
			"s+": date.getSeconds(), //second
			"q+": Math.floor((date.getMonth() + 3) / 3), //quarter
			"S": date.getMilliseconds() //millisecond
		};

		if (/(y+)/i.test(format)) {
			format = format.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length));
		}

		for (var k in o) {
			if (o.hasOwnProperty(k)) {
				if (new RegExp("(" + k + ")").test(format)) {
					format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : ("00" + o[k]).substr(("" + o[k]).length));
				}
			}
		}
		return format;
	};
	exports.formatSellDate = function (date) {
		date = exports.toDate(date);
		var today = exports.addDays(new Date(), 0);

		var offset = Math.floor((date - today) / 1000 / 60);
		var hour = Math.floor(offset / 60);
		var minute = offset % 60;

		if (hour < 24) return "今天" + hour + "点" + (minute ? minute + "分" : "");
		else if (hour < 72) {
			return ["明天", '后天', '大后天'][Math.floor(hour / 24) - 1] + (hour % 24) + "点" + (minute ? minute + "分" : "");
		} else {
			return exports.formatDate(date, "MM月dd日 hh:mm");
		}
	};
	window.f = exports.formatSellDate;
	exports.getDaysDifference = function (date1, date2) {
		/// <summary>获得date1到date2之间隔了多少天</summary>

		return Math.floor((exports.trimToDay(exports.toDate(date2)).getTime() - exports.trimToDay(exports.toDate(date1)).getTime()) / 1000 / 60 / 60 / 24);
	}
	exports.format24hTo12h = function (str) {
		/// <summary>将24小时制式时间转换为12小时制式</summary>
		if (!str)
			return '';

		var args = str.split('/');
		return args.map(function (t) {
			if (!/0?(\d{1,2}):(\d{1,2})/.exec(t))
				return "";

			var h = parseInt(RegExp.$1, 10);
			return h < 13 ? "上午" + h + ":" + RegExp.$2 : "下午" + (h - 12) + ":" + RegExp.$2;

		});
	};
	exports.selectTrain = function (trainList, trainFilter, seatOrder, seatFirst, count) {
		var seat, train;
		if (seatFirst) {
			//席别优先
			seat = _.find(seatOrder, function (s) {
				var treg = _.find(trainFilter, function (t) {
					train = _.find(trainList, function (item) {
						return t.test(item.code) && (_.findWhere(item.tickets, {code: s}) || {}).count >= count;
					});
					return typeof (train) != 'undefined';
				});
				return typeof (treg) != 'undefined';
			});
		} else {
			//车次优先
			_.find(trainFilter, function (t) {
				seat = _.find(seatOrder, function (s) {
					train = _.find(trainList, function (item) {
						return t.test(item.code) && (_.findWhere(item.tickets, {code: s}) || {}).count >= count;
					});
					return typeof (train) != 'undefined';
				});
				return typeof (seat) != 'undefined';
			});
		}

		if (seat)
			return {seat: seat, train: train};
		return null;
	};
	exports.getVcValidate = function (vc) {
		return vc + " " + new Date().toLocaleString() + " keyup " + JSON.stringify({keyCode: vc.charCodeAt(vc.length - 1)});
	};
	exports.parseTimeSpanToMinutes = function (value) {
		/// <summary>将“小时:分钟”格式的时间标签转换为分钟</summary>
		return /0*(\d+)\s*:\s*0*(\d+)/.exec(value) ? (parseInt(RegExp.$1, 10) * 60 + parseInt(RegExp.$2)) : 0;
	};
	exports.formatMinutesToShortStr = function (minutes) {
		/// <summary>将分钟格式化为时间字符串</summary>

		var days = 0;
		var hours = Math.floor(minutes / 60);
		minutes = minutes % 60;

		return (days > 0 ? days + "天" : "") + (hours > 0 ? hours + "小时" : "") + (minutes > 0 ? minutes + "分钟" : "");
	};

	var encodeHTMLRules = {"&": "&#38;", "<": "&#60;", ">": "&#62;", '"': '&#34;', "'": '&#39;', "/": '&#47;'},
		matchHTML = /&(?!#?\w+;)|<|>|"|'|\//g;
	exports.htmlEncode = function (str) {
		return str.replace(matchHTML, function (m) {
			return encodeHTMLRules[m] || m;
		});
	};
	/*
	 * 分析时间字符串，并转换为相当于当天的秒数
	 */
	exports.toTimeSpan = function (str, includeHour) {

		includeHour = typeof includeHour === 'undefined' ? true : includeHour;

		var m = /(\d{1,2}):(\d{1,2})(:(\d{1,2}))?/i.exec(str);
		if (!m) return null;

		var th = m[4] || includeHour ? parseInt(m[1], 10) : 0;
		var tm = parseInt(m[2], 10);
		var ts = m[4] && !includeHour ? parseInt(m[4], 10) : 0;

		return th * 3600 + tm * 60 + ts;
	};
	$.fn.toBase64Data = function () {
		var arr = [];
		this.each(function () {
			if (!this.naturalHeight)
				return;

			var canvas = document.createElement("canvas");
			var height = this.naturalHeight;
			var width = this.naturalWidth;
			canvas.width = width;
			canvas.height = height;
			var ctx = canvas.getContext("2d");
			ctx.drawImage(this, 0, 0, width, height);

			var url = canvas.toDataURL();
			delete canvas;

			arr.push({
				type: "image",
				data: url
			});
		});

		return arr;
	};
});