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

   1 import { Pipe, PipeTransform } from '@angular/core'
   2 import { prepareIcu } from '@app/helpers'
   3
   4 // Thanks: https://stackoverflow.com/questions/3177836/how-to-format-time-since-xxx-e-g-4-minutes-ago-similar-to-stack-exchange-site
   5 @Pipe({ name: 'myFromNow' })
   6 export class FromNowPipe implements PipeTransform {
   7   private yearICU = prepareIcu($localize`{interval, plural, =1 {1 year ago} other {{interval} years ago}}`)
   8   private monthICU = prepareIcu($localize`{interval, plural, =1 {1 month ago} other {{interval} months ago}}`)
   9   private weekICU = prepareIcu($localize`{interval, plural, =1 {1 week ago} other {{interval} weeks ago}}`)
  10   private dayICU = prepareIcu($localize`{interval, plural, =1 {1 day ago} other {{interval} days ago}}`)
  11   private hourICU = prepareIcu($localize`{interval, plural, =1 {1 hour ago} other {{interval} hours ago}}`)
  12
  13   transform (arg: number | Date | string) {
  14     const argDate = new Date(arg)
  15     const seconds = Math.floor((Date.now() - argDate.getTime()) / 1000)
  16
  17     let interval = Math.floor(seconds / 31536000)
  18     if (interval >= 1) {
  19       return this.yearICU({ interval }, $localize`${interval} year(s) ago`)
  20     }
  21
  22     interval = Math.floor(seconds / 2419200)
  23     // 12 months = 360 days, but a year ~ 365 days
  24     // Display "1 year ago" rather than "12 months ago"
  25     if (interval >= 12) return $localize`1 year ago`
  26
  27     if (interval >= 1) {
  28       return this.monthICU({ interval }, $localize`${interval} month(s) ago`)
  29     }
  30
  31     interval = Math.floor(seconds / 604800)
  32     // 4 weeks ~ 28 days, but our month is 30 days
  33     // Display "1 month ago" rather than "4 weeks ago"
  34     if (interval >= 4) return $localize`1 month ago`
  35
  36     if (interval >= 1) {
  37       return this.weekICU({ interval }, $localize`${interval} week(s) ago`)
  38     }
  39
  40     interval = Math.floor(seconds / 86400)
  41     if (interval >= 1) {
  42       return this.dayICU({ interval }, $localize`${interval} day(s) ago`)
  43     }
  44
  45     interval = Math.floor(seconds / 3600)
  46     if (interval >= 1) {
  47       return this.hourICU({ interval }, $localize`${interval} hour(s) ago`)
  48     }
  49
  50     interval = Math.floor(seconds / 60)
  51     if (interval >= 1) return $localize`${interval} min ago`
  52
  53     return $localize`just now`
  54   }
  55 }