47 lines
1.8 KiB
TypeScript
47 lines
1.8 KiB
TypeScript
import {BleProtocolService} from './BleProtocolService';
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import {APP_COMMAND_TYPES, COMMAND_TYPES} from '../protocol/Constants';
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export class FileTransferService {
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private static instance: FileTransferService;
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private protocol = BleProtocolService.getInstance();
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private constructor() {
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}
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public static getInstance(): FileTransferService {
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if (!FileTransferService.instance) {
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FileTransferService.instance = new FileTransferService();
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}
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return FileTransferService.instance;
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}
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public async transferFile(deviceId: string, file: string | ArrayBuffer, type: APP_COMMAND_TYPES, onProgress?: (progress: number) => void): Promise<void> {
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try {
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const startAt = Date.now();
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let arrayBuffer: ArrayBuffer;
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if (file instanceof ArrayBuffer) {
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arrayBuffer = file
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} else {
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const response = await fetch(file);
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if (!response.ok) {
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throw new Error(`Failed to load file: ${response.statusText}`);
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}
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const blob = await response.blob();
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const reader = new FileReader();
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arrayBuffer = await new Promise<ArrayBuffer>((resolve, reject) => {
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reader.onload = () => resolve(reader.result as ArrayBuffer);
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reader.onerror = reject;
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reader.readAsArrayBuffer(blob);
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});
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}
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await this.protocol.send(deviceId, type, arrayBuffer, onProgress);
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const transferredAt = Date.now();
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console.debug(`File transferred in ${(transferredAt - startAt) / 1000} s`);
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} catch (e) {
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console.error("File transfer failed", e);
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throw e;
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}
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}
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}
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