client/src/app/shared/shared-main/angular/from-now.pipe.ts

   1 import { Pipe, PipeTransform } from '@angular/core'
   2
   3 // Thanks: https://stackoverflow.com/questions/3177836/how-to-format-time-since-xxx-e-g-4-minutes-ago-similar-to-stack-exchange-site
   4 @Pipe({ name: 'myFromNow' })
   5 export class FromNowPipe implements PipeTransform {
   6   transform (arg: number | Date | string) {
   7     const argDate = new Date(arg)
   8     const seconds = Math.floor((Date.now() - argDate.getTime()) / 1000)
   9
  10     let interval = Math.floor(seconds / 31536000)
  11     if (interval > 1) return $localize`${interval} years ago`
  12     if (interval === 1) return $localize`1 year ago`
  13
  14     interval = Math.floor(seconds / 2419200)
  15     // 12 months = 360 days, but a year ~ 365 days
  16     // Display "1 year ago" rather than "12 months ago"
  17     if (interval >= 12) return $localize`1 year ago`
  18     if (interval > 1) return $localize`${interval} months ago`
  19     if (interval === 1) return $localize`1 month ago`
  20
  21     interval = Math.floor(seconds / 604800)
  22     // 4 weeks ~ 28 days, but our month is 30 days
  23     // Display "1 month ago" rather than "4 weeks ago"
  24     if (interval >= 4) return $localize`1 month ago`
  25     if (interval > 1) return $localize`${interval} weeks ago`
  26     if (interval === 1) return $localize`1 week ago`
  27
  28     interval = Math.floor(seconds / 86400)
  29     if (interval > 1) return $localize`${interval} days ago`
  30     if (interval === 1) return $localize`1 day ago`
  31
  32     interval = Math.floor(seconds / 3600)
  33     if (interval > 1) return $localize`${interval} hours ago`
  34     if (interval === 1) return $localize`1 hour ago`
  35
  36     interval = Math.floor(seconds / 60)
  37     if (interval >= 1) return $localize`${interval} min ago`
  38
  39     return $localize`just now`
  40   }
  41 }