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/db/config.go

@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2025 Beijing Hardman Automation Equipment Co., LTD. All rights reserved.
+ *
+ *    Project: adapter
+ *    File: config.go
+ *    Last: 2025-05-16 16:15:18
+ *    Author: wangcheng@bj-hardman.com
+ */
+
 package db
 
 type DatabaseConf struct {

bj_power_mes/internal/db/db.go

@@ -1,3 +1,12 @@
+/*
+ * Copyright (c) 2025 Beijing Hardman Automation Equipment Co., LTD. All rights reserved.
+ *
+ *    Project: adapter
+ *    File: db.go
+ *    Last: 2025-05-16 16:13:58
+ *    Author: wangcheng@bj-hardman.com
+ */
+
 package db
 
 import (

bj_power_mes/internal/db/db_test.go

@@ -0,0 +1,54 @@
+package db
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"bj_power_mes/ent"
+	"bj_power_mes/ent/workpiece"
+)
+
+func TestNewDBWithParams(t *testing.T) {
+	client, _, err := NewDBWithParams("postgres", "postgres", "127.0.0.1", 5432, "bj_power_mes", false)
+	if err != nil {
+		t.Errorf("NewDBWithParams() error = %v", err)
+		return
+	}
+
+	defer client.Close()
+	ctx := context.Background()
+	slot, err := nextEmptyTempSlot(ctx, client)
+	if err != nil {
+		t.Errorf("nextEmptyTempSlot() error = %v", err)
+		return
+	}
+	t.Logf("nextEmptyTempSlot() = %v", slot)
+
+}
+
+// tempSlotCapacity 暂存台槽位总数。
+const tempSlotCapacity = 8
+
+// nextEmptyTempSlot 通过数据库查询已占用的 tempSlot，找第一个空位（1-8）。
+func nextEmptyTempSlot(ctx context.Context, entClient *ent.Client) (int, error) {
+	occupied, err := entClient.Workpiece.Query().
+		Where(workpiece.TempSlotNotNil()).
+		Select(workpiece.FieldTempSlot).
+		All(ctx)
+	if err != nil {
+		return 0, fmt.Errorf("查询暂存台占用失败: %w", err)
+	}
+
+	used := make(map[int]struct{}, len(occupied))
+	for _, wp := range occupied {
+		used[wp.TempSlot] = struct{}{}
+	}
+
+	for i := 1; i <= tempSlotCapacity; i++ {
+		if _, ok := used[i]; !ok {
+			return i, nil
+		}
+	}
+	return 0, fmt.Errorf("暂存台无空位")
+}