fix(server): read purchaser identity from JWT claims for owned devices (#333)

go-admin's Authorizator runs per request with the IdentityHandler map,
which carries no user entry, so c.Get("userId") was always 0 and every
purchaser got an empty device list.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NTDbDcwbDw1TSAcE6wfh2F

server/app/goauto/device/handler.go

@@ -47,19 +47,24 @@ func (handler Handler) List(context *gin.Context) {
 }
 
 func currentUserID(c *gin.Context) uint64 {
-	value, ok := c.Get("userId")
-	if !ok {
-		return 0
-	}
-	switch id := value.(type) {
+	// #333: go-admin's Authorizator runs on every request with the
+	// IdentityHandler map, which has no "user" entry, so c.Get("userId") is
+	// always 0 there. The JWT "identity" claim is the authenticated user id.
+	switch id := jwt.ExtractClaims(c)["identity"].(type) {
+	case float64:
+		if id > 0 {
+			return uint64(id)
+		}
 	case int:
-		return uint64(id)
+		if id > 0 {
+			return uint64(id)
+		}
 	case int64:
-		return uint64(id)
+		if id > 0 {
+			return uint64(id)
+		}
 	case uint64:
 		return id
-	case float64:
-		return uint64(id)
 	}
 	return 0
 }

server/app/goauto/device/list_owner_handler_test.go

@@ -0,0 +1,84 @@
+package device
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	jwt "github.com/go-admin-team/go-admin-core/sdk/pkg/jwtauth"
+	"go-admin/app/goauto/models"
+)
+
+// #333: mirrors the real go-admin middleware, whose Authorizator sets
+// userId to 0 on every request while the JWT claims carry the identity.
+func listDevicesAs(t *testing.T, handler Handler, claims jwt.MapClaims) []DeviceListItem {
+	t.Helper()
+	gin.SetMode(gin.TestMode)
+	engine := gin.New()
+	engine.GET("/devices", func(c *gin.Context) {
+		c.Set(jwt.JwtPayloadKey, claims)
+		c.Set("userId", 0)
+		c.Next()
+	}, handler.List)
+	recorder := httptest.NewRecorder()
+	engine.ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, "/devices?page=1&pageSize=20", nil))
+	if recorder.Code != http.StatusOK {
+		t.Fatalf("status=%d body=%s", recorder.Code, recorder.Body.String())
+	}
+	var body struct {
+		Data DeviceListResponse `json:"data"`
+	}
+	if err := json.Unmarshal(recorder.Body.Bytes(), &body); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	return body.Data.Items
+}
+
+func seedOwnedDevice(t *testing.T, handler Handler, name string, owner *uint64) models.AgentDevice {
+	t.Helper()
+	device := models.AgentDevice{
+		InstallID: "install-" + name, Name: name, Manufacturer: "test", Model: "test",
+		AndroidVersion: "14", AgentVersion: "1", PDDVersion: "1", CapabilitiesJSON: "[]",
+		Status: models.DeviceStatusOnline, TokenDigest: fmt.Sprintf("digest-%s", name),
+		TokenIssuedAt: time.Now(), OwnerUserID: owner,
+	}
+	if err := handler.DB.Create(&device).Error; err != nil {
+		t.Fatalf("create device: %v", err)
+	}
+	return device
+}
+
+func deviceNames(items []DeviceListItem) map[string]bool {
+	names := map[string]bool{}
+	for _, item := range items {
+		names[item.Name] = true
+	}
+	return names
+}
+
+func TestDeviceListPurchaserSeesOnlyOwnDevicesFromJWTIdentity(t *testing.T) {
+	handler := Handler{DB: openTestDatabase(t)}
+	two, three := uint64(2), uint64(3)
+	seedOwnedDevice(t, handler, "caigou1-phone", &two)
+	seedOwnedDevice(t, handler, "caigou2-phone", &three)
+	seedOwnedDevice(t, handler, "unowned-phone", nil)
+
+	names := deviceNames(listDevicesAs(t, handler, jwt.MapClaims{"rolekey": "purchaser", "identity": float64(3)}))
+	if len(names) != 1 || !names["caigou2-phone"] {
+		t.Fatalf("purchaser 3 should see only own device, got %v", names)
+	}
+
+	all := deviceNames(listDevicesAs(t, handler, jwt.MapClaims{"rolekey": "admin", "identity": float64(1)}))
+	if len(all) != 3 {
+		t.Fatalf("admin should see all devices, got %v", all)
+	}
+
+	none := listDevicesAs(t, handler, jwt.MapClaims{"rolekey": "purchaser"})
+	if len(none) != 0 {
+		t.Fatalf("purchaser without identity must see no devices, got %d", len(none))
+	}
+}

server/app/goauto/shopeeproduct/current_user_test.go

@@ -0,0 +1,31 @@
+package shopeeproduct
+
+import (
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	jwt "github.com/go-admin-team/go-admin-core/sdk/pkg/jwtauth"
+)
+
+// #333: the real middleware sets userId=0 on every request; the operator used
+// for owned-device collection lookup and audit must come from the JWT identity.
+func TestCurrentUserIDReadsJWTIdentityNotUserIDKey(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	cases := []struct {
+		claims jwt.MapClaims
+		want   uint64
+	}{
+		{jwt.MapClaims{"rolekey": "purchaser", "identity": float64(3)}, 3},
+		{jwt.MapClaims{"rolekey": "purchaser"}, 0},
+		{jwt.MapClaims{"rolekey": "purchaser", "identity": float64(-1)}, 0},
+	}
+	for _, tc := range cases {
+		c, _ := gin.CreateTestContext(httptest.NewRecorder())
+		c.Set(jwt.JwtPayloadKey, tc.claims)
+		c.Set("userId", 0)
+		if got := currentUserID(c); got != tc.want {
+			t.Fatalf("claims %v: got %d want %d", tc.claims, got, tc.want)
+		}
+	}
+}

server/app/goauto/shopeeproduct/handler.go

@@ -427,22 +427,26 @@ func (handler Handler) service(c *gin.Context) (*Service, bool) {
 // purchasing roles per #40; role membership itself is enforced by the router
 // middleware, not here.
 func currentUserID(c *gin.Context) uint64 {
-	value, exists := c.Get("userId")
-	if !exists {
-		return 0
-	}
-	switch id := value.(type) {
+	// #333: go-admin's Authorizator runs on every request with the
+	// IdentityHandler map, which has no "user" entry, so c.Get("userId") is
+	// always 0 there. The JWT "identity" claim is the authenticated user id.
+	switch id := jwt.ExtractClaims(c)["identity"].(type) {
+	case float64:
+		if id > 0 {
+			return uint64(id)
+		}
 	case int:
-		return uint64(id)
+		if id > 0 {
+			return uint64(id)
+		}
 	case int64:
-		return uint64(id)
+		if id > 0 {
+			return uint64(id)
+		}
 	case uint64:
 		return id
-	case float64:
-		return uint64(id)
-	default:
-		return 0
 	}
+	return 0
 }
 
 func currentRole(c *gin.Context) string {