rxjs-obd/lib/model/OBDEvent.js

RxJS Implementation for OBD (On Board Diagnostics) of vehicles via ELM 327 connections.

import * as _ from 'lodash';
import { OBDData } from './OBDData';
import * as fromFields from './OBDFields';
/**
 * OBD Event that will be used in the internal part of the rxjs-obd stream.
 */
export class OBDEvent {
    /**
     * Constructor for OBD Events, only rxjs-obd observables should use it.
     *
     * @param _id The event identifier.
     * @param _connection The connection to ELM 327 OBD Reader.
     * @param _subject The subject to be notified only by pluckODBData from rxjs-obd.
     * @param _data The previous ODB data (Optional).
     */
    constructor(_id, _connection, _subject, _data = new OBDData()) {
        this._id = _id;
        this._connection = _connection;
        this._subject = _subject;
        this._data = _data;
        this._data.timestamp = new Date().getTime();
    }
    /**
     * Update the supported PIDs.
     *
     * @param segment The segment.
     * @param value The value.
     */
    supportedPIDs(segment, value) {
        this._data.supportedPIDs = Object.assign({}, this._data.supportedPIDs, { [segment]: value });
    }
    /**
     * Update a field of the public OBD Data.
     * @param name The field name.
     * @param value the new value of field.
     */
    update(name, value) {
        const field = fromFields[_.snakeCase(name).toUpperCase()];
        const formatted = field.formatter ? field.formatter(field.unit, value) : `${value} ${field.unit}`;
        const { code, label, unit } = field;
        this._data[name] = { code, label, unit, value, formatted };
    }
    /**
     * The subject to be notified only by pluckODBData from rxjs-obd.
     */
    next(data) {
        this._subject.next(data);
    }
    /**
     * Return the event id.
     * @returns the event id.
     */
    get id() {
        return this._id;
    }
    /**
     * Return the internal connection connection to be used by rxjs-obd operators only.
     * @returns The connection connection to ELM 327 OBD Reader.
     */
    get connection() {
        return this._connection;
    }
    /**
     * Return the public data of the rxjs-obd observables.
     * @returns The public data.
     */
    get data() {
        return this._data;
    }
}
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