client/src/app/shared/misc/number-formatter.pipe.ts

   1 import { Pipe, PipeTransform } from '@angular/core'
   2
   3 // Thanks: https://github.com/danrevah/ngx-pipes/blob/master/src/pipes/math/bytes.ts
   4
   5 @Pipe({ name: 'myNumberFormatter' })
   6 export class NumberFormatterPipe implements PipeTransform {
   7   private dictionary: Array<{max: number, type: string}> = [
   8     { max: 1000, type: '' },
   9     { max: 1000000, type: 'K' },
  10     { max: 1000000000, type: 'M' }
  11   ]
  12
  13   transform (value: number) {
  14     const format = this.dictionary.find(d => value < d.max) || this.dictionary[this.dictionary.length - 1]
  15     const calc = Math.floor(value / (format.max / 1000))
  16
  17     return `${calc}${format.type}`
  18   }
  19 }