ceph/src/pybind/mgr/dashboard/frontend/src/app/shared/services/formatter.service.ts

   1 import { Injectable } from '@angular/core';
   2
   3 import _ from 'lodash';
   4
   5 @Injectable({
   6   providedIn: 'root'
   7 })
   8 export class FormatterService {
   9   format_number(n: any, divisor: number, units: string[], decimals: number = 1): string {
  10     if (_.isString(n)) {
  11       n = Number(n);
  12     }
  13     if (!_.isNumber(n)) {
  14       return '-';
  15     }
  16     let unit = n < 1 ? 0 : Math.floor(Math.log(n) / Math.log(divisor));
  17     unit = unit >= units.length ? units.length - 1 : unit;
  18     let result = _.round(n / Math.pow(divisor, unit), decimals).toString();
  19     if (result === '') {
  20       return '-';
  21     }
  22     if (units[unit] !== '') {
  23       result = `${result} ${units[unit]}`;
  24     }
  25     return result;
  26   }
  27
  28   /**
  29    * Convert the given value into bytes.
  30    * @param {string} value The value to be converted, e.g. 1024B, 10M, 300KiB or 1ZB.
  31    * @param error_value The value returned in case the regular expression did not match. Defaults to
  32    *                    null.
  33    * @returns Returns the given value in bytes without any unit appended or the defined error value
  34    *          in case xof an error.
  35    */
  36   toBytes(value: string, error_value: number = null): number | null {
  37     const base = 1024;
  38     const units = ['b', 'k', 'm', 'g', 't', 'p', 'e', 'z', 'y'];
  39     const m = RegExp('^(\\d+(.\\d+)?) ?([' + units.join('') + ']?(b|ib|B/s)?)?$', 'i').exec(value);
  40     if (m === null) {
  41       return error_value;
  42     }
  43     let bytes = parseFloat(m[1]);
  44     if (_.isString(m[3])) {
  45       bytes = bytes * Math.pow(base, units.indexOf(m[3].toLowerCase()[0]));
  46     }
  47     return Math.round(bytes);
  48   }
  49
  50   /**
  51    * Converts `x ms` to `x` (currently) or `0` if the conversion fails
  52    */
  53   toMilliseconds(value: string): number {
  54     const pattern = /^\s*(\d+)\s*(ms)?\s*$/i;
  55     const testResult = pattern.exec(value);
  56
  57     if (testResult !== null) {
  58       return +testResult[1];
  59     }
  60
  61     return 0;
  62   }
  63
  64   /**
  65    * Converts `x IOPS` to `x` (currently) or `0` if the conversion fails
  66    */
  67   toIops(value: string): number {
  68     const pattern = /^\s*(\d+)\s*(IOPS)?\s*$/i;
  69     const testResult = pattern.exec(value);
  70
  71     if (testResult !== null) {
  72       return +testResult[1];
  73     }
  74
  75     return 0;
  76   }
  77 }