// Thanks: https://stackoverflow.com/questions/3177836/how-to-format-time-since-xxx-e-g-4-minutes-ago-similar-to-stack-exchange-site
@Pipe({ name: 'myFromNow' })
export class FromNowPipe implements PipeTransform {
-
transform (arg: number | Date | string) {
const argDate = new Date(arg)
const seconds = Math.floor((Date.now() - argDate.getTime()) / 1000)
- let interval = Math.round(seconds / 31536000)
+ let interval = Math.floor(seconds / 31536000)
if (interval > 1) return $localize`${interval} years ago`
- if (interval === 1) return $localize`${interval} year ago`
+ if (interval === 1) return $localize`1 year ago`
- interval = Math.round(seconds / 2592000)
+ interval = Math.floor(seconds / 2419200)
+ // 12 months = 360 days, but a year ~ 365 days
+ // Display "1 year ago" rather than "12 months ago"
+ if (interval >= 12) return $localize`1 year ago`
if (interval > 1) return $localize`${interval} months ago`
- if (interval === 1) return $localize`${interval} month ago`
+ if (interval === 1) return $localize`1 month ago`
- interval = Math.round(seconds / 604800)
+ interval = Math.floor(seconds / 604800)
+ // 4 weeks ~ 28 days, but our month is 30 days
+ // Display "1 month ago" rather than "4 weeks ago"
+ if (interval >= 4) return $localize`1 month ago`
if (interval > 1) return $localize`${interval} weeks ago`
- if (interval === 1) return $localize`${interval} week ago`
+ if (interval === 1) return $localize`1 week ago`
- interval = Math.round(seconds / 86400)
+ interval = Math.floor(seconds / 86400)
if (interval > 1) return $localize`${interval} days ago`
- if (interval === 1) return $localize`${interval} day ago`
+ if (interval === 1) return $localize`1 day ago`
- interval = Math.round(seconds / 3600)
+ interval = Math.floor(seconds / 3600)
if (interval > 1) return $localize`${interval} hours ago`
- if (interval === 1) return $localize`${interval} hour ago`
+ if (interval === 1) return $localize`1 hour ago`
- interval = Math.round(seconds / 60)
+ interval = Math.floor(seconds / 60)
if (interval >= 1) return $localize`${interval} min ago`
return $localize`just now`