@signalk/streams/dist/canboatjs.js

Utilities for handling streams of Signal K data

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const stream_1 = require("stream");
const canboatjs_1 = require("@canboat/canboatjs");
class CanboatJs extends stream_1.Transform {
    fromPgn;
    app;
    analyzerOutEvent;
    constructor(options) {
        super({ objectMode: true });
        const opts = {
            ...options,
            useCamelCompat: options.useCamelCompat ?? true
        };
        this.fromPgn = new canboatjs_1.FromPgn(opts);
        const createDebug = options.createDebug ?? require('debug');
        const debug = createDebug('signalk:streams:canboatjs');
        this.fromPgn.on('warning', (pgn, warning) => {
            debug(`[warning] ${pgn.pgn} ${warning}`);
            options.app.emit('canboatjs:warning', warning);
        });
        this.fromPgn.on('error', (pgn, err) => {
            console.error(pgn.input, err.message);
            options.app.emit('canboatjs:error', err);
        });
        this.app = options.app;
        this.analyzerOutEvent = options.analyzerOutEvent ?? 'N2KAnalyzerOut';
    }
    _transform(chunk, encoding, done) {
        if (typeof chunk === 'object' &&
            chunk !== null &&
            'fromFile' in chunk &&
            chunk.fromFile) {
            const pgnData = this.fromPgn.parse(chunk.data);
            if (pgnData) {
                pgnData.timestamp = new Date(Number(chunk.timestamp)).toISOString();
                this.push(pgnData);
                this.app.emit(this.analyzerOutEvent, pgnData);
            }
            else {
                this.app.emit('canboatjs:unparsed:object', chunk);
            }
        }
        else {
            const pgnData = this.fromPgn.parse(chunk);
            if (pgnData) {
                this.push(pgnData);
                this.app.emit(this.analyzerOutEvent, pgnData);
            }
            else {
                this.app.emit('canboatjs:unparsed:data', chunk);
            }
        }
        done();
    }
}
exports.default = CanboatJs;