72 lines
2.1 KiB
TypeScript
72 lines
2.1 KiB
TypeScript
import { AppendableBuffer, type LocalWriter, type VirtualWriter } from "../storage/globalApi";
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import * as fflate from "fflate";
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export async function processZip(dataArray: Uint8Array): Promise<string> {
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const jszip = await import("jszip");
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const blob = new Blob([dataArray], { type: "application/zip" });
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const zip = new jszip.default();
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const zipData = await zip.loadAsync(blob);
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const imageFile = Object.keys(zipData.files).find(fileName => /\.(jpg|jpeg|png)$/.test(fileName));
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if (imageFile) {
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const imageData = await zipData.files[imageFile].async("base64");
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return `data:image/png;base64,${imageData}`;
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} else {
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throw new Error("No image found in ZIP file");
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}
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}
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export class CharXWriter{
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zip:fflate.Zip
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writeEnd:boolean = false
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apb = new AppendableBuffer()
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constructor(private writer:LocalWriter|WritableStreamDefaultWriter<Uint8Array>|VirtualWriter){
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const handlerAsync = async (err:Error, dat:Uint8Array, final:boolean) => {
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if(dat){
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this.apb.append(dat)
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}
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if(final){
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this.writeEnd = true
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}
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}
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this.zip = new fflate.Zip()
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this.zip.ondata = handlerAsync
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}
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async init(){
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//do nothing, just to make compatible with other writer
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}
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async write(key:string,data:Uint8Array|string){
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console.log('write',key)
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let dat:Uint8Array
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if(typeof data === 'string'){
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dat = new TextEncoder().encode(data)
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}
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else{
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dat = data
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}
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this.writeEnd = false
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const file = new fflate.ZipDeflate(key, {
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level: 0
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});
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await this.zip.add(file)
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await file.push(dat, true)
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await this.writer.write(this.apb.buffer)
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this.apb.buffer = new Uint8Array(0)
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if(this.writeEnd){
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await this.writer.close()
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}
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}
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async end(){
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await this.zip.end()
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await this.writer.write(this.apb.buffer)
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this.apb.buffer = new Uint8Array(0)
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if(this.writeEnd){
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await this.writer.close()
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}
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}
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} |