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}`

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())
+			}
+		})
+	})
+}

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 {

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)
 }

roomserver/api/api.go

@@ -272,6 +272,8 @@ type ClientRoomserverAPI interface {
 		score int64,
 	) (int64, error)
 	QueryAdminEventReports(ctx context.Context, from, limit uint64, backwards bool, userID, roomID string) ([]QueryAdminEventReportsResponse, int64, error)
+	QueryAdminEventReport(ctx context.Context, reportID uint64) (QueryAdminEventReportResponse, error)
+	PerformAdminDeleteEventReport(ctx context.Context, reportID uint64) error
 }
 
 type UserRoomserverAPI interface {

roomserver/api/query.go

@@ -363,6 +363,11 @@ type QueryAdminEventReportsResponse struct {
 	ReceivedTS       spec.Timestamp         `json:"received_ts"`
 }
 
+type QueryAdminEventReportResponse struct {
+	QueryAdminEventReportsResponse
+	EventJSON json.RawMessage `json:"event_json"`
+}
+
 // MarshalJSON stringifies the room ID and StateKeyTuple keys so they can be sent over the wire in HTTP API mode.
 func (r *QueryBulkStateContentResponse) MarshalJSON() ([]byte, error) {
 	se := make(map[string]string)

roomserver/internal/perform/perform_admin.go

@@ -354,3 +354,7 @@ func (r *Admin) PerformAdminDownloadState(
 
 	return nil
 }
+
+func (r *Admin) PerformAdminDeleteEventReport(ctx context.Context, reportID uint64) error {
+	return r.DB.AdminDeleteEventReport(ctx, reportID)
+}

roomserver/internal/query/query.go

@@ -1109,3 +1109,8 @@ func (r *Queryer) RoomsWithACLs(ctx context.Context) ([]string, error) {
 func (r *Queryer) QueryAdminEventReports(ctx context.Context, from uint64, limit uint64, backwards bool, userID, roomID string) ([]api.QueryAdminEventReportsResponse, int64, error) {
 	return r.DB.QueryAdminEventReports(ctx, from, limit, backwards, userID, roomID)
 }
+
+// QueryAdminEventReport returns a single event report.
+func (r *Queryer) QueryAdminEventReport(ctx context.Context, reportID uint64) (api.QueryAdminEventReportResponse, error) {
+	return r.DB.QueryAdminEventReport(ctx, reportID)
+}

roomserver/storage/interface.go

@@ -196,6 +196,8 @@ type Database interface {
 	// RoomsWithACLs returns all room IDs for rooms with ACLs
 	RoomsWithACLs(ctx context.Context) ([]string, error)
 	QueryAdminEventReports(ctx context.Context, from uint64, limit uint64, backwards bool, userID string, roomID string) ([]api.QueryAdminEventReportsResponse, int64, error)
+	QueryAdminEventReport(ctx context.Context, reportID uint64) (api.QueryAdminEventReportResponse, error)
+	AdminDeleteEventReport(ctx context.Context, reportID uint64) error
 }
 
 type UserRoomKeys interface {

roomserver/storage/postgres/reported_events_table.go

@@ -75,10 +75,20 @@ OFFSET $3
 LIMIT $4
 `
 
+const selectReportedEventSQL = `
+SELECT id, room_nid, event_nid, reporting_user_nid, event_sender_nid, reason, score, received_ts
+FROM roomserver_reported_events
+WHERE id = $1
+`
+
+const deleteReportedEventSQL = `DELETE FROM roomserver_reported_events WHERE id = $1`
+
 type reportedEventsStatements struct {
 	insertReportedEventsStmt     *sql.Stmt
 	selectReportedEventsDescStmt *sql.Stmt
 	selectReportedEventsAscStmt  *sql.Stmt
+	selectReportedEventStmt      *sql.Stmt
+	deleteReportedEventStmt      *sql.Stmt
 }
 
 func CreateReportedEventsTable(db *sql.DB) error {
@@ -93,6 +103,8 @@ func PrepareReportedEventsTable(db *sql.DB) (tables.ReportedEvents, error) {
 		{&s.insertReportedEventsStmt, insertReportedEventSQL},
 		{&s.selectReportedEventsDescStmt, selectReportedEventsDescSQL},
 		{&s.selectReportedEventsAscStmt, selectReportedEventsAscSQL},
+		{&s.selectReportedEventStmt, selectReportedEventSQL},
+		{&s.deleteReportedEventStmt, deleteReportedEventSQL},
 	}.Prepare(db)
 }
 
@@ -178,3 +190,32 @@ func (r *reportedEventsStatements) SelectReportedEvents(
 
 	return result, count, rows.Err()
 }
+
+func (r *reportedEventsStatements) SelectReportedEvent(
+	ctx context.Context,
+	txn *sql.Tx,
+	reportID uint64,
+) (api.QueryAdminEventReportResponse, error) {
+	stmt := sqlutil.TxStmt(txn, r.selectReportedEventStmt)
+
+	var row api.QueryAdminEventReportResponse
+	if err := stmt.QueryRowContext(ctx, reportID).Scan(
+		&row.ID,
+		&row.RoomNID,
+		&row.EventNID,
+		&row.ReportingUserNID,
+		&row.SenderNID,
+		&row.Reason,
+		&row.Score,
+		&row.ReceivedTS,
+	); err != nil {
+		return api.QueryAdminEventReportResponse{}, err
+	}
+	return row, nil
+}
+
+func (r *reportedEventsStatements) DeleteReportedEvent(ctx context.Context, txn *sql.Tx, reportID uint64) error {
+	stmt := sqlutil.TxStmt(txn, r.deleteReportedEventStmt)
+	_, err := stmt.ExecContext(ctx, reportID)
+	return err
+}

roomserver/storage/shared/storage.go

@@ -2040,6 +2040,74 @@ func (d *Database) QueryAdminEventReports(ctx context.Context, from uint64, limi
 	return reports, count, nil
 }
 
+func (d *Database) QueryAdminEventReport(ctx context.Context, reportID uint64) (api.QueryAdminEventReportResponse, error) {
+
+	report, err := d.ReportedEventsTable.SelectReportedEvent(ctx, nil, reportID)
+	if err != nil {
+		return api.QueryAdminEventReportResponse{}, err
+	}
+
+	// Get a map from EventStateKeyNID to userID
+	userNIDMap, err := d.EventStateKeys(ctx, []types.EventStateKeyNID{report.ReportingUserNID, report.SenderNID})
+	if err != nil {
+		logrus.WithError(err).Error("unable to map userNIDs to userIDs")
+		return report, err
+	}
+
+	roomIDs, err := d.RoomsTable.BulkSelectRoomIDs(ctx, nil, []types.RoomNID{report.RoomNID})
+	if err != nil {
+		return report, err
+	}
+
+	if len(roomIDs) != 1 {
+		return report, fmt.Errorf("expected one roomID, got %d", len(roomIDs))
+	}
+
+	// TODO: replace this with something more efficient, as it loads the entire state snapshot.
+	stateContent, err := d.GetBulkStateContent(ctx, roomIDs, []gomatrixserverlib.StateKeyTuple{
+		{EventType: spec.MRoomName, StateKey: ""},
+		{EventType: spec.MRoomCanonicalAlias, StateKey: ""},
+	}, false)
+	if err != nil {
+		return report, err
+	}
+
+	eventIDMap, err := d.EventIDs(ctx, []types.EventNID{report.EventNID})
+	if err != nil {
+		logrus.WithError(err).Error("unable to map eventNIDs to eventIDs")
+		return report, err
+	}
+	if len(eventIDMap) != 1 {
+		return report, fmt.Errorf("expected %d eventIDs, got %d", 1, len(eventIDMap))
+	}
+
+	eventJSONs, err := d.EventJSONTable.BulkSelectEventJSON(ctx, nil, []types.EventNID{report.EventNID})
+	if err != nil {
+		return report, err
+	}
+	if len(eventJSONs) != 1 {
+		return report, fmt.Errorf("expected %d eventJSONs, got %d", 1, len(eventJSONs))
+	}
+
+	roomName, canonicalAlias := findRoomNameAndCanonicalAlias(stateContent, roomIDs[0])
+
+	report.Sender = userNIDMap[report.SenderNID]
+	report.UserID = userNIDMap[report.ReportingUserNID]
+	report.RoomID = roomIDs[0]
+	report.RoomName = roomName
+	report.CanonicalAlias = canonicalAlias
+	report.EventID = eventIDMap[report.EventNID]
+	report.EventJSON = eventJSONs[0].EventJSON
+
+	return report, nil
+}
+
+func (d *Database) AdminDeleteEventReport(ctx context.Context, reportID uint64) error {
+	return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
+		return d.ReportedEventsTable.DeleteReportedEvent(ctx, txn, reportID)
+	})
+}
+
 // findRoomNameAndCanonicalAlias loops over events to find the corresponding room name and canonicalAlias
 // for a given roomID.
 func findRoomNameAndCanonicalAlias(events []tables.StrippedEvent, roomID string) (name, canonicalAlias string) {

roomserver/storage/sqlite3/reported_events_table.go

@@ -74,10 +74,20 @@ LIMIT $3
 OFFSET $4
 `
 
+const selectReportedEventSQL = `
+SELECT id, room_nid, event_nid, reporting_user_nid, event_sender_nid, reason, score, received_ts
+FROM roomserver_reported_events
+WHERE id = $1
+`
+
+const deleteReportedEventSQL = `DELETE FROM roomserver_reported_events WHERE id = $1`
+
 type reportedEventsStatements struct {
 	insertReportedEventsStmt     *sql.Stmt
 	selectReportedEventsDescStmt *sql.Stmt
 	selectReportedEventsAscStmt  *sql.Stmt
+	selectReportedEventStmt      *sql.Stmt
+	deleteReportedEventStmt      *sql.Stmt
 }
 
 func CreateReportedEventsTable(db *sql.DB) error {
@@ -92,6 +102,8 @@ func PrepareReportedEventsTable(db *sql.DB) (tables.ReportedEvents, error) {
 		{&s.insertReportedEventsStmt, insertReportedEventSQL},
 		{&s.selectReportedEventsDescStmt, selectReportedEventsDescSQL},
 		{&s.selectReportedEventsAscStmt, selectReportedEventsAscSQL},
+		{&s.selectReportedEventStmt, selectReportedEventSQL},
+		{&s.deleteReportedEventStmt, deleteReportedEventSQL},
 	}.Prepare(db)
 }
 
@@ -178,3 +190,32 @@ func (r *reportedEventsStatements) SelectReportedEvents(
 
 	return result, count, rows.Err()
 }
+
+func (r *reportedEventsStatements) SelectReportedEvent(
+	ctx context.Context,
+	txn *sql.Tx,
+	reportID uint64,
+) (api.QueryAdminEventReportResponse, error) {
+	stmt := sqlutil.TxStmt(txn, r.selectReportedEventStmt)
+
+	var row api.QueryAdminEventReportResponse
+	if err := stmt.QueryRowContext(ctx, reportID).Scan(
+		&row.ID,
+		&row.RoomNID,
+		&row.EventNID,
+		&row.ReportingUserNID,
+		&row.SenderNID,
+		&row.Reason,
+		&row.Score,
+		&row.ReceivedTS,
+	); err != nil {
+		return api.QueryAdminEventReportResponse{}, err
+	}
+	return row, nil
+}
+
+func (r *reportedEventsStatements) DeleteReportedEvent(ctx context.Context, txn *sql.Tx, reportID uint64) error {
+	stmt := sqlutil.TxStmt(txn, r.deleteReportedEventStmt)
+	_, err := stmt.ExecContext(ctx, reportID)
+	return err
+}

roomserver/storage/tables/interface.go

@@ -147,6 +147,12 @@ type ReportedEvents interface {
 		reportingUserID types.EventStateKeyNID,
 		roomNID types.RoomNID,
 	) ([]api.QueryAdminEventReportsResponse, int64, error)
+	SelectReportedEvent(
+		ctx context.Context,
+		txn *sql.Tx,
+		reportID uint64,
+	) (api.QueryAdminEventReportResponse, error)
+	DeleteReportedEvent(ctx context.Context, txn *sql.Tx, reportID uint64) error
 }
 
 type MembershipState int64