| 1 | 1 | 'use strict'; |
| 2 | | |
| 3 | 1 | function format(diff, divisor, name, prev) { |
| 4 | 31 | var val = Math.floor(diff / divisor); |
| 5 | 31 | return val <= 1 ? prev : val + ' ' + name + 's ago'; |
| 6 | | } |
| 7 | | |
| 8 | 1 | function ago(date) { |
| 9 | | |
| 10 | 33 | var diff = Math.abs(Date.now() - date.getTime()); |
| 11 | | |
| 12 | 33 | if (diff < 60000) { // less than a minute |
| 13 | 2 | return 'just now'; |
| 14 | | } |
| 15 | | |
| 16 | 31 | for (var i = 0; i < ago.units.length; i++) { |
| 17 | 109 | if (diff < ago.units[i].max) { |
| 18 | 31 | return format(diff, ago.units[i].value, ago.units[i].name, ago.units[i].prev); |
| 19 | | } |
| 20 | | } |
| 21 | | |
| 22 | | } |
| 23 | | |
| 24 | 1 | ago.units = [ |
| 25 | | { max: 2760000, value: 60000, name: 'minute', prev: 'a minute ago' }, // max: 46 minutes |
| 26 | | { max: 72000000, value: 3600000, name: 'hour', prev: 'an hour ago' }, // max: 20 hours |
| 27 | | { max: 518400000, value: 86400000, name: 'day', prev: 'yesterday' }, // max: 6 days |
| 28 | | { max: 2419200000, value: 604800000, name: 'week', prev: 'last week' }, // max: 28 days |
| 29 | | { max: 28512000000, value: 2592000000, name: 'month', prev: 'last month' }, // max: 11 months |
| 30 | | { max: Infinity, value: 31536000000, name: 'year', prev: 'last year' } |
| 31 | | ]; |
| 32 | | |
| 33 | 1 | module.exports = ago; |