Telegram Web K with changes to work inside I2P
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65 lines
1.6 KiB
65 lines
1.6 KiB
import {blobConstruct} from './bin_utils'; |
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export class FileManager { |
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public blobSupported = true; |
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constructor() { |
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try { |
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blobConstruct([], ''); |
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} catch(e) { |
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this.blobSupported = false; |
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} |
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} |
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public isAvailable() { |
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return this.blobSupported; |
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} |
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public write(fileWriter: ReturnType<FileManager['getFakeFileWriter']>, bytes: Uint8Array | Blob | string): Promise<void> { |
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if(bytes instanceof Blob) { // is file bytes |
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return new Promise((resolve, reject) => { |
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let fileReader = new FileReader(); |
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fileReader.onload = function(event) { |
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let arrayBuffer = event.target.result as ArrayBuffer; |
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let arr = new Uint8Array(arrayBuffer); |
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fileWriter.write(arr).then(resolve, reject); |
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}; |
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fileReader.readAsArrayBuffer(bytes); |
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}); |
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} else { |
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return fileWriter.write(bytes); |
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} |
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} |
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public getFakeFileWriter(mimeType: string, saveFileCallback?: (blob: Blob) => Promise<Blob>) { |
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const blobParts: Array<Uint8Array | string> = []; |
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const fakeFileWriter = { |
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write: async(part: Uint8Array | string) => { |
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if(!this.blobSupported) { |
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throw false; |
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} |
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blobParts.push(part); |
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}, |
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truncate: () => { |
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blobParts.length = 0; |
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}, |
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finalize: (saveToStorage = true) => { |
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const blob = blobConstruct(blobParts, mimeType); |
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if(saveToStorage && saveFileCallback) { |
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saveFileCallback(blob); |
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} |
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return blob; |
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} |
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}; |
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return fakeFileWriter; |
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} |
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} |
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export default new FileManager();
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