/**
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* echarts日期运算格式化相关
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*
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* @desc echarts基于Canvas，纯Javascript图表库，提供直观，生动，可交互，可个性化定制的数据统计图表。
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* @author Kener (@Kener-林峰, kener.linfeng@gmail.com)
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*
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*/
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define(function() {
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var _timeGap = [
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{formatter: 'hh : mm : ss', value: 1000}, // 1s
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{formatter: 'hh : mm : ss', value: 1000 * 5}, // 5s
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{formatter: 'hh : mm : ss', value: 1000 * 10}, // 10s
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{formatter: 'hh : mm : ss', value: 1000 * 15}, // 15s
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{formatter: 'hh : mm : ss', value: 1000 * 30}, // 30s
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{formatter: 'hh : mm\nMM - dd', value: 60000}, // 1m
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{formatter: 'hh : mm\nMM - dd', value: 60000 * 5}, // 5m
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{formatter: 'hh : mm\nMM - dd', value: 60000 * 10}, // 10m
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{formatter: 'hh : mm\nMM - dd', value: 60000 * 15}, // 15m
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{formatter: 'hh : mm\nMM - dd', value: 60000 * 30}, // 30m
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{formatter: 'hh : mm\nMM - dd', value: 3600000}, // 1h
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{formatter: 'hh : mm\nMM - dd', value: 3600000 * 2}, // 2h
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{formatter: 'hh : mm\nMM - dd', value: 3600000 * 6}, // 6h
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{formatter: 'hh : mm\nMM - dd', value: 3600000 * 12}, // 12h
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{formatter: 'MM - dd\nyyyy', value: 3600000 * 24}, // 1d
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{formatter: 'week', value: 3600000 * 24 * 7}, // 7d
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{formatter: 'month', value: 3600000 * 24 * 31}, // 1M
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{formatter: 'quarter', value: 3600000 * 24 * 380 / 4}, // 3M
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{formatter: 'half-year', value: 3600000 * 24 * 380 / 2},// 6M
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{formatter: 'year', value: 3600000 * 24 * 380} // 1Y
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];
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/**
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* 获取最佳formatter
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* @params {number} min 最小值
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* @params {number} max 最大值
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* @params {=number} splitNumber 分隔段数
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*/
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function getAutoFormatter(min, max, splitNumber) {
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splitNumber = splitNumber > 1 ? splitNumber : 2;
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// 最优解
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var curValue;
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var totalGap;
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// 目标
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var formatter;
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var gapValue;
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for (var i = 0, l = _timeGap.length; i < l; i++) {
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curValue = _timeGap[i].value;
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totalGap = Math.ceil(max / curValue) * curValue
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- Math.floor(min / curValue) * curValue;
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if (Math.round(totalGap / curValue) <= splitNumber * 1.2) {
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formatter = _timeGap[i].formatter;
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gapValue = _timeGap[i].value;
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// console.log(formatter, gapValue,i);
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break;
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}
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}
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if (formatter == null) {
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formatter = 'year';
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curValue = 3600000 * 24 * 367;
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totalGap = Math.ceil(max / curValue) * curValue
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- Math.floor(min / curValue) * curValue;
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gapValue = Math.round(totalGap / (splitNumber - 1) / curValue) * curValue;
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}
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return {
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formatter: formatter,
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gapValue: gapValue
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};
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}
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/**
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* 一位数字补0
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*/
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function s2d (v) {
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return v < 10 ? ('0' + v) : v;
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}
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/**
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* 百分比计算
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*/
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function format(formatter, value) {
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if (formatter == 'week'
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|| formatter == 'month'
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|| formatter == 'quarter'
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|| formatter == 'half-year'
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|| formatter == 'year'
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) {
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formatter = 'MM - dd\nyyyy';
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}
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var date = getNewDate(value);
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var y = date.getFullYear();
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var M = date.getMonth() + 1;
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var d = date.getDate();
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var h = date.getHours();
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var m = date.getMinutes();
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var s = date.getSeconds();
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formatter = formatter.replace('MM', s2d(M));
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formatter = formatter.toLowerCase();
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formatter = formatter.replace('yyyy', y);
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formatter = formatter.replace('yy', y % 100);
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formatter = formatter.replace('dd', s2d(d));
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formatter = formatter.replace('d', d);
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formatter = formatter.replace('hh', s2d(h));
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formatter = formatter.replace('h', h);
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formatter = formatter.replace('mm', s2d(m));
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formatter = formatter.replace('m', m);
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formatter = formatter.replace('ss', s2d(s));
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formatter = formatter.replace('s', s);
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return formatter;
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}
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function nextMonday(value) {
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value = getNewDate(value);
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value.setDate(value.getDate() + 8 - value.getDay());
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return value;
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}
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function nextNthPerNmonth(value, nth, nmon) {
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value = getNewDate(value);
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value.setMonth(Math.ceil((value.getMonth() + 1) / nmon) * nmon);
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value.setDate(nth);
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return value;
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}
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function nextNthOnMonth(value, nth) {
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return nextNthPerNmonth(value, nth, 1);
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}
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function nextNthOnQuarterYear(value, nth) {
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return nextNthPerNmonth(value, nth, 3);
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}
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function nextNthOnHalfYear(value, nth) {
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return nextNthPerNmonth(value, nth, 6);
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}
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function nextNthOnYear(value, nth) {
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return nextNthPerNmonth(value, nth, 12);
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}
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function getNewDate(value) {
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return value instanceof Date
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? value
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: new Date(typeof value == 'string' ? value.replace(/-/g, '/') : value);
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}
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return {
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getAutoFormatter: getAutoFormatter,
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getNewDate: getNewDate,
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format: format,
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nextMonday: nextMonday,
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nextNthPerNmonth: nextNthPerNmonth,
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nextNthOnMonth: nextNthOnMonth,
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nextNthOnQuarterYear: nextNthOnQuarterYear,
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nextNthOnHalfYear: nextNthOnHalfYear,
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nextNthOnYear : nextNthOnYear
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};
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});
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