chenged display of devices according to user`s role. all changes are made in backend

server/internal/middleware/access.go

@@ -0,0 +1,37 @@
+package middleware
+
+import (
+	"smoop-api/internal/handlers"
+	"smoop-api/internal/models"
+
+	"github.com/gin-gonic/gin"
+)
+
+// DeviceAccessFilter middleware sets filtering context for device access
+func DeviceAccessFilter() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		userContext, exists := c.Get("user")
+		if !exists {
+			c.JSON(401, gin.H{"error": "unauthorized"})
+			c.Abort()
+			return
+		}
+
+		user, ok := userContext.(handlers.UserContext)
+		if !ok {
+			c.JSON(401, gin.H{"error": "invalid user data"})
+			c.Abort()
+			return
+		}
+
+		// Set filter flag and user ID in context
+		if user.Role == models.RoleAdmin {
+			c.Set("filterDevices", false) // Admin sees all devices
+		} else {
+			c.Set("filterDevices", true) // Regular user needs filtering
+			c.Set("userID", user.ID)     // Store user ID for filtering
+		}
+
+		c.Next()
+	}
+}