cacheTypes/Archive.js

/**
 * An archive from an index
 * @category Cache Types
 * @hideconstructor
 */
class Archive {
	constructor() {
		/**
		 * The ID of the file
		 * @type {number}
		 */
		this.id = 0;

		this.name = "";

		/** @type {number} */
		this.hash = 0;

		/**
		 * Hashed name of the archive. Hashes can be brute forced or cracked hashes can be found online
		 * @type {number}
		 */
		this.nameHash = 0;

		/** @type {number} */
		this.crc = 0;

		/** @type {number} */
		this.revision = 0;

		this.filesLoaded = false;

		/** 
		 * The files containing definitions within the archive
		 * @type {Array}
		 */
		this.files = [];
	}

	loadFiles(data) {
		if (this.files.length == 1) {
			this.files[0].content = data;
			return;
		}
		let dataview = new DataView(data.buffer);
		let chunks = dataview.getUint8(data.length - 1);

		let chunkSizes = [];
		for (let i = 0; i < this.files.length; i++) {
			chunkSizes[i] = [];
		}
		let fileSizes = Array(this.files.length).fill(0);

		let streamPosition = data.length - 1 - chunks * this.files.length * 4;

		//the following two loops can be combined in to one
		for (let i = 0; i < chunks; i++) {
			let chunkSize = 0;
			for (let id = 0; id < this.files.length; id++) {
				//rip magic number

				let delta = dataview.getInt32(streamPosition);
				chunkSize += delta;
				streamPosition += 4;
				chunkSizes[id][i] = chunkSize;
				fileSizes[id] += chunkSize;
				//if (id > 32915 && id < 32950)
				//console.log(id, delta, streamPosition);
				//if (id > 32210 && id < 32220)
				//console.log(id, delta, streamPosition);
			}
		}
		//console.log(data);
		//console.log(chunkSizes);
		//console.log(fileSizes);

		let fileOffsets = Array(this.files.length).fill(0);

		streamPosition = 0;

		for (let i = 0; i < chunks; i++) {
			for (let id = 0; id < this.files.length; id++) {
				let chunkSize = chunkSizes[id][i];
				//console.log(chunkSize);
				//System.out.println(fileOffsets[id] + " " + chunkSize + " " + stream.getOffset() + " " + stream.remaining());
				//console.log(id + " " + fileOffsets[id] + " " + chunkSize);
				if (this.files[id].content == undefined) this.files[id].content = [];
				//dez - can be done in a better way
				var newData = new Uint8Array(dataview.buffer.slice(streamPosition, streamPosition + chunkSize));
				var contentUpdate = new Uint8Array(this.files[id].content.length + newData.length);
				contentUpdate.set(this.files[id].content);
				contentUpdate.set(newData, this.files[id].content.length);

				this.files[id].content = contentUpdate;
				fileOffsets[id] += chunkSize;

				if (id == 0) {
					//console.log(this.files[id].content);
					//console.log(newData);
					//console.log(streamPosition);
				}
				streamPosition += newData.byteLength;
				//console.log(fileOffsets[id]);
				//console.log(this.files[id].content);
			}
		}
		//console.log(fileOffsets);
		//console.log(this.files[0]);

	}
}

export default Archive;