1 files changed, 77 insertions, 0 deletions
diff --git a/src/pybind/mgr/dashboard/frontend/src/app/shared/services/formatter.service.ts b/src/pybind/mgr/dashboard/frontend/src/app/shared/services/formatter.service.ts
new file mode 100644
index 000000000..a4b6d427b
--- /dev/null
+++ b/src/pybind/mgr/dashboard/frontend/src/app/shared/services/formatter.service.ts
@@ -0,0 +1,77 @@
+import { Injectable } from '@angular/core';
+
+import _ from 'lodash';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class FormatterService {
+  format_number(n: any, divisor: number, units: string[], decimals: number = 1): string {
+    if (_.isString(n)) {
+      n = Number(n);
+    }
+    if (!_.isNumber(n)) {
+      return '-';
+    }
+    let unit = n < 1 ? 0 : Math.floor(Math.log(n) / Math.log(divisor));
+    unit = unit >= units.length ? units.length - 1 : unit;
+    let result = _.round(n / Math.pow(divisor, unit), decimals).toString();
+    if (result === '') {
+      return '-';
+    }
+    if (units[unit] !== '') {
+      result = `${result} ${units[unit]}`;
+    }
+    return result;
+  }
+
+  /**
+   * Convert the given value into bytes.
+   * @param {string} value The value to be converted, e.g. 1024B, 10M, 300KiB or 1ZB.
+   * @param error_value The value returned in case the regular expression did not match. Defaults to
+   *                    null.
+   * @returns Returns the given value in bytes without any unit appended or the defined error value
+   *          in case xof an error.
+   */
+  toBytes(value: string, error_value: number = null): number | null {
+    const base = 1024;
+    const units = ['b', 'k', 'm', 'g', 't', 'p', 'e', 'z', 'y'];
+    const m = RegExp('^(\\d+(.\\d+)?) ?([' + units.join('') + ']?(b|ib|B/s)?)?$', 'i').exec(value);
+    if (m === null) {
+      return error_value;
+    }
+    let bytes = parseFloat(m[1]);
+    if (_.isString(m[3])) {
+      bytes = bytes * Math.pow(base, units.indexOf(m[3].toLowerCase()[0]));
+    }
+    return Math.round(bytes);
+  }
+
+  /**
+   * Converts `x ms` to `x` (currently) or `0` if the conversion fails
+   */
+  toMilliseconds(value: string): number {
+    const pattern = /^\s*(\d+)\s*(ms)?\s*$/i;
+    const testResult = pattern.exec(value);
+
+    if (testResult !== null) {
+      return +testResult[1];
+    }
+
+    return 0;
+  }
+
+  /**
+   * Converts `x IOPS` to `x` (currently) or `0` if the conversion fails
+   */
+  toIops(value: string): number {
+    const pattern = /^\s*(\d+)\s*(IOPS)?\s*$/i;
+    const testResult = pattern.exec(value);
+
+    if (testResult !== null) {
+      return +testResult[1];
+    }
+
+    return 0;
+  }
+}