node-red-contrib-mysensors/src/lib/decoder/mysensors-decoder.ts

Mysensors related nodes, for decoding / encoding mysensors serial protocol and MQTT topic, and wrapping arbitrary messages into mysensors compatible messages

import { IStorage } from '../storage-interface';
import { IStrongMysensorsMsg, MysensorsCommand } from '../mysensors-msg';
import {
    mysensor_command,
    mysensor_data,
    mysensor_internal,
    mysensor_sensor,
    mysensor_stream,
} from '../mysensors-types';
import { NullCheck } from '../nullcheck';

export abstract class MysensorsDecoder {
    protected enrichWithDb: boolean;

    constructor(enrich?: boolean, private database?: IStorage) {
        this.enrichWithDb = enrich && !!database || false;
    }

    protected async enrich(msg: IStrongMysensorsMsg<MysensorsCommand>): Promise<IStrongMysensorsMsg<MysensorsCommand>> {
        const newMsg: IStrongMysensorsMsg<MysensorsCommand> = {
            ...msg
        };
        newMsg.messageTypeStr = mysensor_command[msg.messageType];
        switch (msg.messageType)
        {
            case mysensor_command.C_INTERNAL:
                newMsg.subTypeStr = mysensor_internal[msg.subType];
                break;
            case mysensor_command.C_PRESENTATION:
                newMsg.subTypeStr = mysensor_sensor[msg.subType];
                break;
            case mysensor_command.C_REQ:
            case mysensor_command.C_SET:
                newMsg.subTypeStr = mysensor_data[msg.subType];
                break;
            case mysensor_command.C_STREAM:
                newMsg.subTypeStr = mysensor_stream[msg.subType];
                break;
        }
        if (this.enrichWithDb && this.database)
        {
            const res = await this.database.getChild(msg.nodeId, msg.childSensorId);
            if (NullCheck.isDefinedOrNonNull(res)) {
                newMsg.sensorTypeStr = mysensor_sensor[res.sType];
            }
        }

        return newMsg;
    }
}