helpers.js
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/**
* Handlebars helpers
* bikai kai.bi@yoho.cn
* 2016-05-10
*/
'use strict';
const querystring = require('querystring');
const _ = require('lodash');
const moment = require('moment');
const config = require('../config/common');
/**
* 七牛图片路径处理
* @param {[tring]} url
* @param {[tring]} width
* @param {[tring]} height
* @param {[tring]} mode
* @return {[tring]}
*/
exports.image = (url, width, height, mode) => {
mode = _.isNumber(mode) ? mode : 2;
url = url || '';
return url.replace(/{width}/g, width).replace(/{height}/g, height).replace(/{mode}/g, mode);
};
/**
* 站内地址格式化
* @param {[string]} uri 路径
* @param {[object]} qs 查询字符串
* @param {[string]} module 模块
* @return {[string]}
*/
exports.url = (uri, qs, module) => {
const subDomain = '.m.yohobuy.com';
const subName = {
default: config.siteUrl,
guang: '//guang' + subDomain,
list: '//list' + subDomain,
search: '//search' + subDomain,
huodong: '//huodong' + subDomain,
activity: '//activity.yohobuy.com',
index: config.siteUrl
};
let url;
module = module || 'default';
if (subName[module]) {
url = subName[module];
} else {
url = '//' + module + subDomain; // 规则没匹配到就把模块当作子域名
}
url += uri;
if (qs) {
url += '?' + querystring.stringify(qs);
}
return url;
};
/**
* 大写转小写处理
* @param {[string]} str 转换字符
*/
exports.lowerCase = (str) => {
str = str || '';
return str.toLowerCase();
};
/**
* 小写转大写处理
* @param {[string]} str 转换字符
*/
exports.upperCase = (str) => {
str = str || '';
return str.toUpperCase();
};
/**
* 时间格式化
* @param format 格式化token @see{http://momentjs.cn/docs/#/displaying/format/}
* @param date 日期或者数字
* @return string
*
*/
exports.dateFormat = (format, date) => {
if (typeof format !== 'string' || typeof date === 'undefined') {
return '';
} else {
if (date instanceof Date) {
return moment(date).format(format);
} else {
let d = moment.unix(date);
return moment(d).utc().format(format);
}
}
};
/**
* 时间差格式化
* @param {[string]} format 格式化字符串
* @param {[number]} diff 相差值
* @param {[string]} type diff时间类型 默认ms
*
* Key Shorthand
* years y
* quarters Q
* months M
* weeks w
* days d
* hours h
* minutes m
* seconds s
* milliseconds ms
*
* @example
* let diff = 60 * 60 * 24 * (1.3) + 2;
*
* let s = helpers.dateDiffFormat('{d}天{h}小时', diff, 's');
* >>> 1天7小时
*/
exports.dateDiffFormat = (format, diff, type) => {
if (typeof format !== 'string' || typeof diff === 'undefined') {
return '';
} else {
type = type || 'ms';
let m = moment.duration(diff, type);
format.match(/(\{.*?\})/g).forEach((s) => {
format = format.replace(s, m.get(s.substring(1, s.length - 1)));
});
return format;
}
};