node-unrar-js/esm/js/ExtractorFile.js

Pure JavaScript RAR archive extractor by compile the official unrar lib by Emscripten.

import * as fs from 'fs';
import * as path from 'path';
import { Extractor } from './Extractor';
export class ExtractorFile extends Extractor {
    constructor(
    // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types,@typescript-eslint/no-explicit-any
    unrar, filepath, targetPath, password, filenameTransform) {
        super(unrar, password);
        this.filenameTransform = filenameTransform;
        this._filePath = filepath;
        this.fileMap = {};
        this._target = targetPath;
    }
    open(filename) {
        const fd = fs.openSync(filename, 'r');
        this.fileMap[fd] = {
            size: fs.fstatSync(fd).size,
            pos: 0,
            name: filename,
        };
        return fd;
    }
    create(filename) {
        const fullpath = path.join(this._target, this.filenameTransform(filename));
        const dir = path.parse(fullpath).dir;
        // Skip if directory is the current directory
        if (dir !== '') {
            fs.mkdirSync(dir, { recursive: true });
        }
        const fd = fs.openSync(fullpath, 'w');
        this.fileMap[fd] = {
            size: 0,
            pos: 0,
            name: filename,
        };
        return fd;
    }
    closeFile(fd) {
        delete this.fileMap[fd];
        fs.closeSync(fd);
    }
    read(fd, buf, size) {
        const file = this.fileMap[fd];
        const buffer = Buffer.allocUnsafe(size);
        const readed = fs.readSync(fd, buffer, 0, size, file.pos);
        this.unrar.HEAPU8.set(buffer, buf);
        file.pos += readed;
        return readed;
    }
    write(fd, buf, size) {
        const file = this.fileMap[fd];
        const writeNum = fs.writeSync(fd, Buffer.from(this.unrar.HEAPU8.subarray(buf, buf + size)), 0, size);
        file.pos += writeNum;
        file.size += writeNum;
        return writeNum === size;
    }
    tell(fd) {
        return this.fileMap[fd].pos;
    }
    seek(fd, pos, method) {
        const file = this.fileMap[fd];
        let newPos = file.pos;
        if (method === 'SET') {
            newPos = 0;
        }
        else if (method === 'END') {
            newPos = file.size;
        }
        newPos += pos;
        if (newPos < 0 || newPos > file.size) {
            return false;
        }
        file.pos = newPos;
        return true;
    }
}
//# sourceMappingURL=ExtractorFile.js.map