server code

server/internal/controller/device/device_v1_get_random_device.go

@@ -0,0 +1,37 @@
+/*
+SPDX-FileCopyrightText: 2026 M5Stack Technology CO LTD
+SPDX-License-Identifier: MIT
+*/
+
+package device
+
+import (
+	"context"
+	"stackChan/api/device/v1"
+	"stackChan/internal/dao"
+	"stackChan/internal/model/entity"
+	"stackChan/internal/web_socket"
+)
+
+func (c *ControllerV1) GetRandomDevice(ctx context.Context, req *v1.GetRandomDeviceReq) (res *v1.GetRandomDeviceRes, err error) {
+
+	// Obtain the list of online StackChan mac addresses (excluding the current user) from the websocket layer.
+	macList := web_socket.GetRandomStackChanDevice(req.Mac, 6)
+
+	if len(macList) == 0 {
+		res = (*v1.GetRandomDeviceRes)(&[]entity.Device{})
+		return res, nil
+	}
+
+	// Query device information based on the Mac list
+	list := make([]entity.Device, 0, len(macList))
+	err = dao.Device.
+		Ctx(ctx).
+		WhereIn("mac", macList).
+		Scan(&list)
+	if err != nil {
+		return nil, err
+	}
+	res = (*v1.GetRandomDeviceRes)(&list)
+	return res, nil
+}