| |
| const MS_PER_SECOND = 1000; |
| const MS_PER_MINUTE = 60000; |
| const MS_PER_HOUR = 3600000; |
| const MS_PER_DAY = 86400000; |
| const MS_PER_YEAR = 31536000000; |
|
|
| export function timeDifferenceShort(current: number, previous: number) { |
| const elapsed = current - previous; |
|
|
| if (elapsed < MS_PER_MINUTE) { |
| return Math.round(elapsed / MS_PER_SECOND) + 's'; |
| } else if (elapsed < MS_PER_HOUR) { |
| return Math.round(elapsed / MS_PER_MINUTE) + 'm'; |
| } else if (elapsed < MS_PER_DAY) { |
| return Math.round(elapsed / MS_PER_HOUR) + 'h'; |
| } else if (elapsed < MS_PER_YEAR) { |
| return Math.round(elapsed / MS_PER_DAY) + 'd'; |
| } else { |
| return Math.round(elapsed / MS_PER_YEAR) + 'y'; |
| } |
| } |
|
|
| export function timeDifference(current: number, previous: ?number): string { |
| if (!previous) return ''; |
|
|
| const msPerMinute = 60 * 1000; |
| const msPerHour = msPerMinute * 60; |
| const msPerDay = msPerHour * 24; |
| const msPerMonth = msPerDay * 30; |
| const msPerYear = msPerDay * 365; |
|
|
| let elapsed = current - previous; |
|
|
| if (elapsed < msPerMinute) { |
| return 'Just now'; |
| } else if (elapsed < msPerHour) { |
| const now = Math.round(elapsed / msPerMinute); |
| if (now === 1) { |
| return '1 minute ago'; |
| } else { |
| return `${now} minutes ago`; |
| } |
| } else if (elapsed < msPerDay) { |
| const now = Math.round(elapsed / msPerHour); |
| if (now === 1) { |
| return '1 hour ago'; |
| } else { |
| return `${now} hours ago`; |
| } |
| } else if (elapsed < msPerMonth) { |
| const now = Math.round(elapsed / msPerDay); |
| if (now === 1) { |
| return 'Yesterday'; |
| } else if (now >= 7 && now <= 13) { |
| return '1 week ago'; |
| } else if (now >= 14 && now <= 20) { |
| return '2 weeks ago'; |
| } else if (now >= 21 && now <= 28) { |
| return '3 weeks ago'; |
| } else { |
| return `${now} days ago`; |
| } |
| } else if (elapsed < msPerYear) { |
| const now = Math.round(elapsed / msPerMonth); |
| if (now === 1) { |
| return '1 month ago'; |
| } else { |
| return `${now} months ago`; |
| } |
| } else { |
| const now = Math.round(elapsed / msPerYear); |
| if (now === 1) { |
| return '1 year ago'; |
| } else { |
| return `${now} years ago`; |
| } |
| } |
| } |
|
|
