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| /** | ||
| * Copyright 2023-present DreamNum Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| import type { Nullable } from '../shared'; | ||
| import { Inject, Injector } from '@wendellhu/redi'; | ||
| import { FBase } from './f-base'; | ||
|
|
||
| export interface IFBlobSource { | ||
| /** | ||
| * Return the data inside this object as a blob. | ||
| */ | ||
| getBlob(): FBlob; | ||
|
|
||
| /** | ||
| * Return the data inside this object as a blob converted to the specified content type. | ||
| * @param contentType the content type refer to https://developer.mozilla.org/en-US/docs/Web/HTTP/MIME_types/Common_types | ||
| */ | ||
| getAs(contentType: string): FBlob; | ||
| } | ||
|
|
||
| export class FBlob extends FBase { | ||
| constructor( | ||
| private _blob: Nullable<Blob>, | ||
| @Inject(Injector) protected readonly _injector: Injector | ||
| ) { | ||
| super(); | ||
| } | ||
|
|
||
| /** | ||
| * Returns a copy of this blob. | ||
| * @returns a new blob by copying the current blob | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(blob); | ||
| * const newBlob = blob.copyBlob(); | ||
| * console.log(newBlob); | ||
| * ``` | ||
| */ | ||
| copyBlob() { | ||
| return this._injector.createInstance(FBlob, this._blob); | ||
| } | ||
|
|
||
| /** | ||
| * Return the data inside this object as a blob converted to the specified content type. | ||
| * @param contentType the content type refer to https://developer.mozilla.org/en-US/docs/Web/HTTP/MIME_types/Common_types | ||
| * @returns a new blob by converting the current blob to the specified content type | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(blob); | ||
| * const newBlob = blob.getBlob(); | ||
| * ``` | ||
| */ | ||
| getAs(contentType: string) { | ||
| const newBlob = this.copyBlob(); | ||
| newBlob.setContentType(contentType); | ||
| return newBlob; | ||
| } | ||
|
|
||
| /** | ||
| * get the blob as a string | ||
| * @returns | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(blob); | ||
| * const newBlob = blob.getDataAsString(); | ||
| * console.log(newBlob); | ||
| * ``` | ||
| */ | ||
| getDataAsString(): Promise<string>; | ||
| /** | ||
| * get the blob as a string | ||
| * @param charset the charset | ||
| * @returns the blob content as a string | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(blob); | ||
| * const newBlob = blob.getDataAsString('iso-8859-1'); | ||
| * console.log(newBlob); | ||
| * ``` | ||
| */ | ||
| getDataAsString(charset?: string): Promise<string>; | ||
| getDataAsString(charset?: string): Promise<string> { | ||
| if (this._blob === null) { | ||
| return Promise.resolve(''); | ||
| } | ||
|
|
||
| if (charset === undefined) { | ||
| return this._blob!.text(); | ||
| } | ||
| return new Promise((resolve, reject) => { | ||
| this._blob!.arrayBuffer().then((arrayBuffer) => { | ||
| const text = new TextDecoder(charset).decode(arrayBuffer); // 解码为字符串 | ||
| resolve(text); | ||
| }).catch((error) => { | ||
| reject(new Error(`Failed to read Blob as ArrayBuffer: ${error.message}`)); | ||
| }); | ||
| }); | ||
| } | ||
|
|
||
| /** | ||
| * Gets the data stored in this blob. | ||
| * @returns the blob content as a byte array | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(blob); | ||
| * const newBlob = blob.getBytes(); | ||
| * console.log(newBlob); | ||
| * ``` | ||
| */ | ||
| getBytes(): Promise<Uint8Array> { | ||
| if (!this._blob) { | ||
| return Promise.reject(new Error('Blob is undefined or null.')); | ||
| } | ||
| return this._blob.arrayBuffer().then((buffer) => new Uint8Array(buffer)); | ||
| } | ||
|
|
||
| /** | ||
| * Sets the data stored in this blob. | ||
| * @param bytes a byte array | ||
| * @returns the blob object | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(); | ||
| * const bytes = new Uint8Array(10); | ||
| * blob.setBytes(bytes); | ||
| * ``` | ||
| */ | ||
| setBytes(bytes: Uint8Array): FBlob { | ||
| this._blob = new Blob([bytes]); | ||
| return this; | ||
| } | ||
|
|
||
| /** | ||
| * Sets the data stored in this blob. | ||
| * @param data blob data string | ||
| * @returns the blob object | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(); | ||
| * blob.setDataFromString('Hello, World!'); | ||
| * ``` | ||
| */ | ||
| setDataFromString(data: string): FBlob; | ||
| /** | ||
| * Sets the data stored in this blob. | ||
| * @param data a string | ||
| * @param contentType the content type refer to https://developer.mozilla.org/en-US/docs/Web/HTTP/MIME_types/Common_types | ||
| * @returns the blob object | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(); | ||
| * blob.setDataFromString('Hello, World!', 'text/plain'); | ||
| * ``` | ||
| */ | ||
| setDataFromString(data: string, contentType?: string): FBlob; | ||
| setDataFromString(data: string, contentType?: string): FBlob { | ||
| const contentTypeVal = contentType ?? 'text/plain'; | ||
| const blob = new Blob([data], { type: contentTypeVal }); | ||
| this._blob = blob; | ||
| return this; | ||
| } | ||
|
|
||
| /** | ||
| * Gets the content type of the data stored in this blob. | ||
| * @returns the content type | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(blob); | ||
| * const newBlob = blob.getContentType(); | ||
| * console.log(newBlob); | ||
| * ``` | ||
| */ | ||
| getContentType() { | ||
| return this._blob?.type; | ||
| } | ||
|
|
||
| /** | ||
| * Sets the content type of the data stored in this blob. | ||
| * @param contentType the content type refer to https://developer.mozilla.org/en-US/docs/Web/HTTP/MIME_types/Common_types | ||
| * @returns the blob object | ||
| * @example | ||
| * ```ts | ||
| * const blob = UniverApi.newBlob(blob); | ||
| * const newBlob = blob.setContentType('text/plain'); | ||
| * console.log(newBlob); | ||
| * ``` | ||
| */ | ||
| setContentType(contentType: string): FBlob { | ||
| this._blob = this._blob?.slice(0, this._blob.size, contentType); | ||
| return this; | ||
| } | ||
| } |
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