fix: rebuild MES as compilable go-zero+ent backend (renamed bj_power_mes), restore 3 workstation projects from pristine original, align naming; all Go projects go build clean

bj_power_mes/internal/camera/client.go

@@ -0,0 +1,154 @@
+package camera
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"fmt"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+// 命令常量
+const (
+	CmdTakePhoto          = "T1"
+	CmdGetDetectionResult = "GM,2,0"
+)
+
+type Client struct {
+	addr    string
+	conn    net.Conn
+	timeout time.Duration
+	mu      sync.Mutex
+}
+
+func NewClient(addr string, timeout ...time.Duration) *Client {
+	t := 1 * time.Second
+	if len(timeout) > 0 {
+		t = timeout[0]
+	}
+	return &Client{
+		addr:    addr,
+		timeout: t,
+	}
+}
+
+func (c *Client) Connect() error {
+	logx.Infof("正在连接相机: %s", c.addr)
+	conn, err := net.DialTimeout("tcp", c.addr, c.timeout)
+	if err != nil {
+		logx.Errorf("相机连接失败: %v", err)
+		return fmt.Errorf("相机连接失败: %w", err)
+	}
+	c.conn = conn
+	logx.Infof("相机连接成功: %s", c.addr)
+	return nil
+}
+
+func (c *Client) ConnectWithRetry(maxRetries int, retryInterval time.Duration) error {
+	var err error
+	for i := 0; i < maxRetries; i++ {
+		err = c.Connect()
+		if err == nil {
+			return nil
+		}
+		logx.Errorf("连接失败，%v后重试...", retryInterval)
+		time.Sleep(retryInterval)
+	}
+	return fmt.Errorf("连接相机失败: %w", err)
+}
+
+func (c *Client) IsConnected() bool {
+	return c.conn != nil
+}
+
+func (c *Client) Reconnect() error {
+	c.Close()
+	return c.Connect()
+}
+
+func (c *Client) SendCommand(cmd string) ([]byte, error) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	if c.conn == nil {
+		return nil, fmt.Errorf("未建立连接")
+	}
+
+	logx.Infof("发送相机指令: %s", cmd)
+	_, err := c.conn.Write([]byte(cmd + "\r"))
+	if err != nil {
+		logx.Errorf("发送指令失败: %v", err)
+		return nil, fmt.Errorf("发送指令失败: %w", err)
+	}
+	resp, err := c.readResponse()
+	if err != nil {
+		return nil, err
+	}
+	logx.Infof("收到相机响应: %s", string(resp))
+	return resp, nil
+}
+
+func (c *Client) readResponse() ([]byte, error) {
+	reader := bufio.NewReader(c.conn)
+	var buffer bytes.Buffer
+
+	if err := c.conn.SetReadDeadline(time.Now().Add(c.timeout)); err != nil {
+		return nil, err
+	}
+
+	for {
+		b, err := reader.ReadByte()
+		if err != nil {
+			return nil, err
+		}
+		buffer.WriteByte(b)
+		if b == '\r' || b == '\n' {
+			break
+		}
+	}
+	return buffer.Bytes(), nil
+}
+
+func (c *Client) SendCommandWithContext(ctx context.Context, cmd string) ([]byte, error) {
+	type result struct {
+		resp []byte
+		err  error
+	}
+	ch := make(chan result, 1)
+
+	go func() {
+		resp, err := c.SendCommand(cmd)
+		ch <- result{resp, err}
+	}()
+
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	case res := <-ch:
+		return res.resp, res.err
+	}
+}
+
+func (c *Client) TakePhoto() error {
+	_, err := c.SendCommand(CmdTakePhoto)
+	return err
+}
+
+func (c *Client) GetDetectionResult() (string, error) {
+	resp, err := c.SendCommand(CmdGetDetectionResult)
+	if err != nil {
+		return "", err
+	}
+	return string(resp), nil
+}
+func (c *Client) Close() {
+	if c.conn != nil {
+		c.conn.Close()
+		c.conn = nil
+		logx.Infof("相机连接已关闭")
+	}
+}