node-red-contrib-symi/lib/handleTcp.js

Node-RED nodes for smart home device communication with Home Assistant integration, supporting HassKit, Clowire, Alive, LF and complete Symi protocols

/**
 * TCP协议处理器
 * 支持多种工业设备通信协议
 */

class HandleTcp {
    constructor(tcpClient, devtype) {
        this.tcpClient = tcpClient
        this.devtype = devtype
        this.protocol = null
        this.onData = null
        
        // 加载对应的协议处理器
        try {
            this.protocol = require(`./protocols/${devtype}`)
        } catch (e) {
            console.error(`协议 ${devtype} 不支持:`, e.message)
            return
        }
        
        // 注册数据接收回调
        this.tcpClient.onData = [this.handleReceive.bind(this), this]
    }
    
    /**
     * 处理接收到的数据
     * @param {Buffer} data 
     */
    handleReceive(data) {
        if (!this.protocol || !this.protocol.handleRece) return
        
        const processedData = this.protocol.handleRece(data)
        if (processedData && this.onData) {
            this.onData(processedData)
        }
    }
    
    /**
     * 写入数据（带锁）
     * @param {Buffer|Array} data 
     */
    write_lock(data) {
        if (!this.protocol || !this.protocol.handle_write) return
        
        const processedData = this.protocol.handle_write(data)
        if (processedData) {
            this.tcpClient.write_lock(processedData)
        }
    }
    
    /**
     * 获取对象转缓冲区的处理函数
     * @param {string} domain 
     */
    getObjToBuf(domain) {
        if (!this.protocol) return null
        return this.protocol.getObjToBuf ? this.protocol.getObjToBuf(domain) : null
    }
    
    /**
     * 获取缓冲区转对象的处理函数
     * @param {string} domain 
     */
    getBufToObj(domain) {
        if (!this.protocol) return null
        return this.protocol.getBufToObj ? this.protocol.getBufToObj(domain) : null
    }
}

module.exports = HandleTcp;