@hamstudy/flamp/dist/block.js

JavaScript Amateur Multicast Protocol AMP-2 Version 3 Implemented from specification document http://www.w1hkj.com/files/flamp/Amp-2.V3.0.Protocol.pdf • Version 1.0.0 - W5ALT, Walt Fair, Jr. (Derived From) • Version 2.0.0 - W1HKJ, Dave Freese, w

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Block = void 0;
const amp_1 = require("./amp");
const crc16_1 = require("./crc16");
class Block {
    keyword;
    data;
    hash;
    controlWord;
    blockNum; // Data block number
    constructor(keyword, data) {
        this.keyword = keyword;
        this.data = data;
        let closeBrace = data.indexOf('}');
        let blockStuff = data.substring(1, closeBrace).split(':');
        this.hash = blockStuff[0];
        this.data = this.data.substring(closeBrace + 1);
        if (this.keyword === amp_1.LTypes.DATA) {
            this.blockNum = parseInt(blockStuff[1], 10);
        }
        else if (this.keyword === amp_1.LTypes.CNTL) {
            this.controlWord = blockStuff[1];
        }
    }
    static MakeBlock(opts) {
        switch (opts.keyword) {
            case amp_1.LTypes.DATA:
                return new this(opts.keyword, `{${opts.hash}:${opts.blockNum || 0}}${opts.data}`);
            case amp_1.LTypes.CNTL:
                return new this(opts.keyword, `{${opts.hash}:${opts.controlWord}}`);
            default:
                return new this(opts.keyword, `{${opts.hash}}${opts.data}`);
        }
    }
    get checksum() {
        return (0, crc16_1.crc16)(this.getHashString() + this.data);
    }
    get byteCount() {
        return this.getHashString().length + this.data.length;
    }
    getHashString() {
        let hash;
        switch (this.keyword) {
            case amp_1.LTypes.DATA:
                hash = `{${this.hash}:${this.blockNum}}`;
                break;
            case amp_1.LTypes.CNTL:
                hash = `{${this.hash}:${this.controlWord}}`;
                break;
            default:
                hash = `{${this.hash}}`;
                break;
        }
        return hash;
    }
    toString() {
        return `<${this.keyword} ${this.byteCount} ${this.checksum}>${this.getHashString()}${this.data}`;
    }
}
exports.Block = Block;