fix(hub): user alerts idor

fixes very unlikely scenario where user guesses another user's 15
character random system id and adds alerts for it

internal/hub/api_test.go

@@ -11,6 +11,7 @@ import (
 	beszelTests "github.com/henrygd/beszel/internal/tests"
 
 	"github.com/henrygd/beszel/internal/migrations"
+	"github.com/pocketbase/dbx"
 	"github.com/pocketbase/pocketbase/core"
 	pbTests "github.com/pocketbase/pocketbase/tests"
 	"github.com/stretchr/testify/require"
@@ -55,7 +56,7 @@ func TestApiRoutesAuthentication(t *testing.T) {
 	// Create test system
 	system, err := beszelTests.CreateRecord(hub, "systems", map[string]any{
 		"name":  "test-system",
-		"users": []string{user.Id},
+		"users": []string{user.Id, readOnlyUser.Id},
 		"host":  "127.0.0.1",
 	})
 	require.NoError(t, err, "Failed to create test system")
@@ -277,6 +278,24 @@ func TestApiRoutesAuthentication(t *testing.T) {
 				"systems": []string{system.Id},
 			}),
 		},
+		{
+			Name:   "POST /user-alerts - readonly user can create own alert",
+			Method: http.MethodPost,
+			URL:    "/api/beszel/user-alerts",
+			Headers: map[string]string{
+				"Authorization": readOnlyUserToken,
+			},
+			ExpectedStatus:  200,
+			ExpectedContent: []string{"\"success\":true"},
+			TestAppFactory:  testAppFactory,
+			Body: jsonReader(map[string]any{
+				"name": "CPU", "value": 80, "min": 10, "systems": []string{system.Id},
+			}),
+			AfterTestFunc: func(t testing.TB, app *pbTests.TestApp, res *http.Response) {
+				alerts, _ := app.CountRecords("alerts", dbx.HashExp{"user": readOnlyUser.Id})
+				require.EqualValues(t, 1, alerts)
+			},
+		},
 		{
 			Name:            "DELETE /user-alerts - no auth should fail",
 			Method:          http.MethodDelete,
@@ -314,6 +333,29 @@ func TestApiRoutesAuthentication(t *testing.T) {
 				})
 			},
 		},
+		{
+			Name:   "DELETE /user-alerts - readonly user can delete own alert",
+			Method: http.MethodDelete,
+			URL:    "/api/beszel/user-alerts",
+			Headers: map[string]string{
+				"Authorization": readOnlyUserToken,
+			},
+			ExpectedStatus:  200,
+			ExpectedContent: []string{"\"count\":1", "\"success\":true"},
+			TestAppFactory:  testAppFactory,
+			Body: jsonReader(map[string]any{
+				"name": "CPU", "systems": []string{system.Id},
+			}),
+			BeforeTestFunc: func(t testing.TB, app *pbTests.TestApp, e *core.ServeEvent) {
+				beszelTests.CreateRecord(app, "alerts", map[string]any{
+					"name": "CPU", "system": system.Id, "user": readOnlyUser.Id, "value": 80,
+				})
+			},
+			AfterTestFunc: func(t testing.TB, app *pbTests.TestApp, res *http.Response) {
+				alerts, _ := app.CountRecords("alerts", dbx.HashExp{"user": readOnlyUser.Id})
+				require.Zero(t, alerts)
+			},
+		},
 		{
 			Name:            "GET /containers/logs - no auth should fail",
 			Method:          http.MethodGet,