Add getting/deleting single event report (#3344)

Based on https://github.com/matrix-org/dendrite/pull/3342

Adds `GET /_synapse/admin/v1/event_reports/{reportID}` and `DELETE
/_synapse/admin/v1/event_reports/{reportID}`

3 files changed, 206 insertions, 1 deletions

diff --git a/clientapi/admin_test.go b/clientapi/admin_test.go
index 2444f0be..b2adeb75 100644
--- a/clientapi/admin_test.go
+++ b/clientapi/admin_test.go
@@ -1336,3 +1336,140 @@ func TestAdminQueryEventReports(t *testing.T) {
 		})
 	})
 }
+
+func TestEventReportsGetDelete(t *testing.T) {
+	alice := test.NewUser(t, test.WithAccountType(uapi.AccountTypeAdmin))
+	bob := test.NewUser(t)
+	room := test.NewRoom(t, alice)
+
+	// Add a name and alias
+	roomName := "Testing"
+	alias := "#testing"
+	room.CreateAndInsert(t, alice, spec.MRoomName, map[string]string{"name": roomName}, test.WithStateKey(""))
+	room.CreateAndInsert(t, alice, spec.MRoomCanonicalAlias, map[string]string{"alias": alias}, test.WithStateKey(""))
+
+	// Join the rooms with Bob
+	room.CreateAndInsert(t, bob, spec.MRoomMember, map[string]interface{}{
+		"membership": "join",
+	}, test.WithStateKey(bob.ID))
+
+	// Create a few events to report
+
+	eventIDToReport := room.CreateAndInsert(t, alice, "m.room.message", map[string]interface{}{"body": "hello world"})
+
+	test.WithAllDatabases(t, func(t *testing.T, dbType test.DBType) {
+		cfg, processCtx, close := testrig.CreateConfig(t, dbType)
+		routers := httputil.NewRouters()
+		cm := sqlutil.NewConnectionManager(processCtx, cfg.Global.DatabaseOptions)
+		caches := caching.NewRistrettoCache(128*1024*1024, time.Hour, caching.DisableMetrics)
+		defer close()
+		natsInstance := jetstream.NATSInstance{}
+		jsctx, _ := natsInstance.Prepare(processCtx, &cfg.Global.JetStream)
+		defer jetstream.DeleteAllStreams(jsctx, &cfg.Global.JetStream)
+
+		// Use an actual roomserver for this
+		rsAPI := roomserver.NewInternalAPI(processCtx, cfg, cm, &natsInstance, caches, caching.DisableMetrics)
+		rsAPI.SetFederationAPI(nil, nil)
+		userAPI := userapi.NewInternalAPI(processCtx, cfg, cm, &natsInstance, rsAPI, nil, caching.DisableMetrics, testIsBlacklistedOrBackingOff)
+
+		if err := api.SendEvents(context.Background(), rsAPI, api.KindNew, room.Events(), "test", "test", "test", nil, false); err != nil {
+			t.Fatalf("failed to send events: %v", err)
+		}
+
+		// We mostly need the rsAPI for this test, so nil for other APIs/caches etc.
+		AddPublicRoutes(processCtx, routers, cfg, &natsInstance, nil, rsAPI, nil, nil, nil, userAPI, nil, nil, caching.DisableMetrics)
+
+		accessTokens := map[*test.User]userDevice{
+			alice: {},
+			bob:   {},
+		}
+		createAccessTokens(t, accessTokens, userAPI, processCtx.Context(), routers)
+
+		reqBody := map[string]any{
+			"reason": "baaad",
+			"score":  -100,
+		}
+		body, err := json.Marshal(reqBody)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		w := httptest.NewRecorder()
+
+		var req *http.Request
+		// Report the event
+		req = httptest.NewRequest(http.MethodPost, fmt.Sprintf("/_matrix/client/v3/rooms/%s/report/%s", room.ID, eventIDToReport.EventID()), strings.NewReader(string(body)))
+		req.Header.Set("Authorization", "Bearer "+accessTokens[bob].accessToken)
+
+		routers.Client.ServeHTTP(w, req)
+
+		if w.Code != http.StatusOK {
+			t.Fatalf("expected report to succeed, got HTTP %d instead: %s", w.Code, w.Body.String())
+		}
+
+		t.Run("Can not query with invalid ID", func(t *testing.T) {
+			w = httptest.NewRecorder()
+			req = httptest.NewRequest(http.MethodGet, "/_synapse/admin/v1/event_reports/abc", strings.NewReader(string(body)))
+			req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+
+			routers.SynapseAdmin.ServeHTTP(w, req)
+
+			if w.Code != http.StatusBadRequest {
+				t.Fatalf("expected getting report to fail, got HTTP %d instead: %s", w.Code, w.Body.String())
+			}
+		})
+
+		t.Run("Can query with valid ID", func(t *testing.T) {
+			w = httptest.NewRecorder()
+			req = httptest.NewRequest(http.MethodGet, "/_synapse/admin/v1/event_reports/1", strings.NewReader(string(body)))
+			req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+
+			routers.SynapseAdmin.ServeHTTP(w, req)
+
+			if w.Code != http.StatusOK {
+				t.Fatalf("expected getting report to fail, got HTTP %d instead: %s", w.Code, w.Body.String())
+			}
+			resp := api.QueryAdminEventReportResponse{}
+			if err = json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+				t.Fatal(err)
+			}
+			// test a few things
+			if resp.EventID != eventIDToReport.EventID() {
+				t.Fatalf("expected eventID to be %s, got %s instead", eventIDToReport.EventID(), resp.EventID)
+			}
+			if resp.RoomName != roomName {
+				t.Fatalf("expected roomName to be %s, got %s instead", roomName, resp.RoomName)
+			}
+			if resp.CanonicalAlias != alias {
+				t.Fatalf("expected alias to be %s, got %s instead", alias, resp.CanonicalAlias)
+			}
+			if reflect.DeepEqual(resp.EventJSON, eventIDToReport.JSON()) {
+				t.Fatal("mismatching eventJSON")
+			}
+		})
+
+		t.Run("Can delete with a valid ID", func(t *testing.T) {
+			w = httptest.NewRecorder()
+			req = httptest.NewRequest(http.MethodDelete, "/_synapse/admin/v1/event_reports/1", strings.NewReader(string(body)))
+			req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+
+			routers.SynapseAdmin.ServeHTTP(w, req)
+
+			if w.Code != http.StatusOK {
+				t.Fatalf("expected getting report to fail, got HTTP %d instead: %s", w.Code, w.Body.String())
+			}
+		})
+
+		t.Run("Can not query deleted report", func(t *testing.T) {
+			w = httptest.NewRecorder()
+			req = httptest.NewRequest(http.MethodGet, "/_synapse/admin/v1/event_reports/1", strings.NewReader(string(body)))
+			req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+
+			routers.SynapseAdmin.ServeHTTP(w, req)
+
+			if w.Code == http.StatusOK {
+				t.Fatalf("expected getting report to fail, got HTTP %d instead: %s", w.Code, w.Body.String())
+			}
+		})
+	})
+}
diff --git a/clientapi/routing/admin.go b/clientapi/routing/admin.go
index e91e098a..68e62b08 100644
--- a/clientapi/routing/admin.go
+++ b/clientapi/routing/admin.go
@@ -530,6 +530,54 @@ func GetEventReports(
 	}
 }
 
+func GetEventReport(req *http.Request, rsAPI roomserverAPI.ClientRoomserverAPI, reportID string) util.JSONResponse {
+	parsedReportID, err := strconv.ParseUint(reportID, 10, 64)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			// Given this is an admin endpoint, let them know what didn't work.
+			JSON: spec.InvalidParam(err.Error()),
+		}
+	}
+
+	report, err := rsAPI.QueryAdminEventReport(req.Context(), parsedReportID)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusInternalServerError,
+			JSON: spec.Unknown(err.Error()),
+		}
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusOK,
+		JSON: report,
+	}
+}
+
+func DeleteEventReport(req *http.Request, rsAPI roomserverAPI.ClientRoomserverAPI, reportID string) util.JSONResponse {
+	parsedReportID, err := strconv.ParseUint(reportID, 10, 64)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			// Given this is an admin endpoint, let them know what didn't work.
+			JSON: spec.InvalidParam(err.Error()),
+		}
+	}
+
+	err = rsAPI.PerformAdminDeleteEventReport(req.Context(), parsedReportID)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusInternalServerError,
+			JSON: spec.Unknown(err.Error()),
+		}
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusOK,
+		JSON: struct{}{},
+	}
+}
+
 func parseUint64OrDefault(input string, defaultValue uint64) uint64 {
 	v, err := strconv.ParseUint(input, 10, 64)
 	if err != nil {
diff --git a/clientapi/routing/routing.go b/clientapi/routing/routing.go
index dc63a2c2..c96c6538 100644
--- a/clientapi/routing/routing.go
+++ b/clientapi/routing/routing.go
@@ -1535,7 +1535,7 @@ func Setup(
 	).Methods(http.MethodPost, http.MethodOptions)
 
 	synapseAdminRouter.Handle("/admin/v1/event_reports",
-		httputil.MakeAdminAPI("admin_report_event", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse {
+		httputil.MakeAdminAPI("admin_report_events", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse {
 			from := parseUint64OrDefault(req.URL.Query().Get("from"), 0)
 			limit := parseUint64OrDefault(req.URL.Query().Get("limit"), 100)
 			dir := req.URL.Query().Get("dir")
@@ -1547,4 +1547,24 @@ func Setup(
 			return GetEventReports(req, rsAPI, from, limit, backwards, userID, roomID)
 		}),
 	).Methods(http.MethodGet, http.MethodOptions)
+
+	synapseAdminRouter.Handle("/admin/v1/event_reports/{reportID}",
+		httputil.MakeAdminAPI("admin_report_event", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse {
+			vars, err := httputil.URLDecodeMapValues(mux.Vars(req))
+			if err != nil {
+				return util.ErrorResponse(err)
+			}
+			return GetEventReport(req, rsAPI, vars["reportID"])
+		}),
+	).Methods(http.MethodGet, http.MethodOptions)
+
+	synapseAdminRouter.Handle("/admin/v1/event_reports/{reportID}",
+		httputil.MakeAdminAPI("admin_report_event_delete", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse {
+			vars, err := httputil.URLDecodeMapValues(mux.Vars(req))
+			if err != nil {
+				return util.ErrorResponse(err)
+			}
+			return DeleteEventReport(req, rsAPI, vars["reportID"])
+		}),
+	).Methods(http.MethodDelete, http.MethodOptions)
 }