| 1 | | |
| 2 | | /** |
| 3 | | * Module dependencies. |
| 4 | | */ |
| 5 | 1 | var crypto = require('crypto'); |
| 6 | 1 | var __program = {}; |
| 7 | 1 | var __timer = {}; |
| 8 | | |
| 9 | | |
| 10 | 1 | function md5(str){ |
| 11 | 3 | var hash = crypto.createHash('md5'); |
| 12 | 3 | str += new Date().getTime(); |
| 13 | 3 | return hash.update(str, 'utf-8').digest('hex'); |
| 14 | | } |
| 15 | | |
| 16 | 1 | function abort(key){ |
| 17 | 1 | clearInterval(__program[key]); |
| 18 | 1 | delete __timer[key]; |
| 19 | | } |
| 20 | 1 | function again(func, interval, times){ |
| 21 | 3 | interval = interval || 1000; |
| 22 | | |
| 23 | 3 | var f = function () { |
| 24 | 3 | var that = this; |
| 25 | 3 | var args = f.arguments; |
| 26 | 3 | func.apply(that, args); //执行一次 |
| 27 | 3 | var key = md5(func.toString()); |
| 28 | 3 | var obj = {}; |
| 29 | 3 | if (times === 1) { |
| 30 | 1 | return; |
| 31 | | } |
| 32 | 2 | if (times > 1) { |
| 33 | 1 | obj.times = times; |
| 34 | 1 | obj.count = 0; |
| 35 | | } |
| 36 | 2 | __timer[key] = obj; |
| 37 | 2 | __program[key] = setInterval(function () { |
| 38 | 351 | func.apply(that, args); |
| 39 | 351 | if (__timer[key] && __timer[key].times) { |
| 40 | 1 | var obj = __timer[key]; |
| 41 | 1 | obj.count++; |
| 42 | 1 | if ((obj.times - 1) <= obj.count) { |
| 43 | 1 | abort(key); |
| 44 | | } |
| 45 | | } |
| 46 | | }, interval) |
| 47 | | } |
| 48 | 3 | return f; |
| 49 | | } |
| 50 | | |
| 51 | 1 | module.exports = again; |