fixes #330pull/351/head
Jason Kulatunga
2 years ago
parent
ce2f990eb1
commit
3f272b36d4
@ -1,75 +1,27 @@
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/**
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* @license
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* Copyright (c) 2019 Jonathan Catmull.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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import { Pipe, PipeTransform } from '@angular/core';
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import {Pipe, PipeTransform} from '@angular/core';
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type unit = 'bytes' | 'KB' | 'MB' | 'GB' | 'TB' | 'PB';
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type unitPrecisionMap = {
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[u in unit]: number;
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};
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const defaultPrecisionMap: unitPrecisionMap = {
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bytes: 0,
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KB: 0,
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MB: 1,
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GB: 1,
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TB: 2,
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PB: 2
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};
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/*
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* Convert bytes into largest possible unit.
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* Takes an precision argument that can be a number or a map for each unit.
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* Usage:
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* bytes | fileSize:precision
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* @example
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* // returns 1 KB
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* {{ 1500 | fileSize }}
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* @example
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* // returns 2.1 GB
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* {{ 2100000000 | fileSize }}
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* @example
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* // returns 1.46 KB
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* {{ 1500 | fileSize:2 }}
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*/
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@Pipe({ name: 'fileSize' })
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@Pipe({name: 'fileSize'})
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export class FileSizePipe implements PipeTransform {
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private readonly units: unit[] = ['bytes', 'KB', 'MB', 'GB', 'TB', 'PB'];
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transform(bytes: number = 0, precision: number | unitPrecisionMap = defaultPrecisionMap): string {
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if (isNaN(parseFloat(String(bytes))) || !isFinite(bytes)) return '?';
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let unitIndex = 0;
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transform(bytes: number = 0, si = false, dp = 1): string {
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const thresh = si ? 1000 : 1024;
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while (bytes >= 1024) {
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bytes /= 1024;
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unitIndex++;
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if (Math.abs(bytes) < thresh) {
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return bytes + ' B';
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}
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const unit = this.units[unitIndex];
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const units = si
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? ['kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
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: ['KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'];
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let u = -1;
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const r = 10 ** dp;
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if (typeof precision === 'number') {
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return `${bytes.toFixed(+precision)} ${unit}`;
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}
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return `${bytes.toFixed(precision[unit])} ${unit}`;
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do {
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bytes /= thresh;
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++u;
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} while (Math.round(Math.abs(bytes) * r) / r >= thresh && u < units.length - 1);
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return bytes.toFixed(dp) + ' ' + units[u];
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}
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}
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