Add pushrules tests (#3044)

partly takes care of https://github.com/matrix-org/dendrite/issues/2870
by making sure that rule IDs don't start with a dot.

Co-authored-by: kegsay <kegan@matrix.org>

5 files changed, 430 insertions, 68 deletions

diff --git a/clientapi/clientapi_test.go b/clientapi/clientapi_test.go
index 76295ba5..0be26273 100644
--- a/clientapi/clientapi_test.go
+++ b/clientapi/clientapi_test.go
@@ -8,10 +8,12 @@ import (
 	"io"
 	"net/http"
 	"net/http/httptest"
+	"net/url"
 	"strings"
 	"testing"
 	"time"
 
+	"github.com/matrix-org/dendrite/internal/pushrules"
 	"github.com/matrix-org/gomatrix"
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
@@ -1235,3 +1237,396 @@ func Test3PID(t *testing.T) {
 		}
 	})
 }
+
+func TestPushRules(t *testing.T) {
+	alice := test.NewUser(t)
+
+	// create the default push rules, used when validating responses
+	localpart, serverName, _ := gomatrixserverlib.SplitID('@', alice.ID)
+	pushRuleSets := pushrules.DefaultAccountRuleSets(localpart, serverName)
+	defaultRules, err := json.Marshal(pushRuleSets)
+	assert.NoError(t, err)
+
+	ruleID1 := "myrule"
+	ruleID2 := "myrule2"
+	ruleID3 := "myrule3"
+
+	test.WithAllDatabases(t, func(t *testing.T, dbType test.DBType) {
+		cfg, processCtx, close := testrig.CreateConfig(t, dbType)
+		cfg.ClientAPI.RateLimiting.Enabled = false
+		caches := caching.NewRistrettoCache(128*1024*1024, time.Hour, caching.DisableMetrics)
+		natsInstance := jetstream.NATSInstance{}
+		defer close()
+
+		routers := httputil.NewRouters()
+		cm := sqlutil.NewConnectionManager(processCtx, cfg.Global.DatabaseOptions)
+		rsAPI := roomserver.NewInternalAPI(processCtx, cfg, cm, &natsInstance, caches, caching.DisableMetrics)
+		userAPI := userapi.NewInternalAPI(processCtx, cfg, cm, &natsInstance, rsAPI, nil)
+
+		// 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: {},
+		}
+		createAccessTokens(t, accessTokens, userAPI, processCtx.Context(), routers)
+
+		testCases := []struct {
+			name           string
+			request        *http.Request
+			wantStatusCode int
+			validateFunc   func(t *testing.T, respBody *bytes.Buffer) // used when updating rules, otherwise wantStatusCode should be enough
+			queryAttr      map[string]string
+		}{
+			{
+				name:           "can not get rules without trailing slash",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can get default rules",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					assert.Equal(t, defaultRules, respBody.Bytes())
+				},
+			},
+			{
+				name:           "can get rules by scope",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					assert.Equal(t, gjson.GetBytes(defaultRules, "global").Raw, respBody.String())
+				},
+			},
+			{
+				name:           "can not get invalid rules by scope",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/doesnotexist/", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not get rules for invalid scope and kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/doesnotexist/invalid/", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not get rules for invalid kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/invalid/", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can get rules by scope and kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					assert.Equal(t, gjson.GetBytes(defaultRules, "global.override").Raw, respBody.String())
+				},
+			},
+			{
+				name:           "can get rules by scope and content kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/content/", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					assert.Equal(t, gjson.GetBytes(defaultRules, "global.content").Raw, respBody.String())
+				},
+			},
+			{
+				name:           "can not get rules by scope and room kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/room/", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not get rules by scope and sender kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/sender/", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can get rules by scope and underride kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/underride/", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					assert.Equal(t, gjson.GetBytes(defaultRules, "global.underride").Raw, respBody.String())
+				},
+			},
+			{
+				name:           "can not get rules by scope, kind and ID for invalid scope",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/doesnotexist/doesnotexist/.m.rule.master", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not get rules by scope, kind and ID for invalid kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/doesnotexist/.m.rule.master", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can get rules by scope, kind and ID",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/.m.rule.master", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+			},
+			{
+				name:           "can not get rules by scope, kind and ID for invalid ID",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/.m.rule.doesnotexist", strings.NewReader("")),
+				wantStatusCode: http.StatusNotFound,
+			},
+			{
+				name:           "can not get status for invalid attribute",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/invalid", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not get status for invalid kind",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/invalid/.m.rule.master/enabled", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not get enabled status for invalid scope",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/invalid/override/.m.rule.master/enabled", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not get enabled status for invalid rule",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/doesnotexist/enabled", strings.NewReader("")),
+				wantStatusCode: http.StatusNotFound,
+			},
+			{
+				name:           "can get enabled rules by scope, kind and ID",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/enabled", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					assert.False(t, gjson.GetBytes(respBody.Bytes(), "enabled").Bool(), "expected master rule to be disabled")
+				},
+			},
+			{
+				name:           "can get actions scope, kind and ID",
+				request:        httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/actions", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					actions := gjson.GetBytes(respBody.Bytes(), "actions").Array()
+					// only a basic check
+					assert.Equal(t, 1, len(actions))
+				},
+			},
+			{
+				name:           "can not set enabled status with invalid JSON",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/enabled", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not set attribute for invalid attribute",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/doesnotexist", strings.NewReader("{}")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not set attribute for invalid scope",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/invalid/override/.m.rule.master/enabled", strings.NewReader("{}")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not set attribute for invalid kind",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/invalid/.m.rule.master/enabled", strings.NewReader("{}")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not set attribute for invalid rule",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/override/invalid/enabled", strings.NewReader("{}")),
+				wantStatusCode: http.StatusNotFound,
+			},
+			{
+				name:           "can set enabled status with valid JSON",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/enabled", strings.NewReader(`{"enabled":true}`)),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					rec := httptest.NewRecorder()
+					req := httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/enabled", strings.NewReader(""))
+					req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+					routers.Client.ServeHTTP(rec, req)
+					assert.Equal(t, http.StatusOK, rec.Code, rec.Body.String())
+					assert.True(t, gjson.GetBytes(rec.Body.Bytes(), "enabled").Bool(), "expected master rule to be enabled: %s", rec.Body.String())
+				},
+			},
+			{
+				name:           "can set actions with valid JSON",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/actions", strings.NewReader(`{"actions":["dont_notify","notify"]}`)),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					rec := httptest.NewRecorder()
+					req := httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/override/.m.rule.master/actions", strings.NewReader(""))
+					req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+					routers.Client.ServeHTTP(rec, req)
+					assert.Equal(t, http.StatusOK, rec.Code, rec.Body.String())
+					assert.Equal(t, 2, len(gjson.GetBytes(rec.Body.Bytes(), "actions").Array()), "expected 2 actions %s", rec.Body.String())
+				},
+			},
+			{
+				name:           "can not create new push rule with invalid JSON",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/content/myrule", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not create new push rule with invalid rule content",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/content/myrule", strings.NewReader("{}")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not create new push rule with invalid scope",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/invalid/content/myrule", strings.NewReader(`{"actions":["notify"],"pattern":"world"}`)),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can create new push rule with valid rule content",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/content/myrule", strings.NewReader(`{"actions":["notify"],"pattern":"world"}`)),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					rec := httptest.NewRecorder()
+					req := httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/content/myrule/actions", strings.NewReader(""))
+					req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+					routers.Client.ServeHTTP(rec, req)
+					assert.Equal(t, http.StatusOK, rec.Code, rec.Body.String())
+					assert.Equal(t, 1, len(gjson.GetBytes(rec.Body.Bytes(), "actions").Array()), "expected 1 action %s", rec.Body.String())
+				},
+			},
+			{
+				name:           "can not create new push starting with a dot",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/content/.myrule", strings.NewReader(`{"actions":["notify"],"pattern":"world"}`)),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:    "can create new push rule after existing",
+				request: httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/content/myrule2", strings.NewReader(`{"actions":["notify"],"pattern":"world"}`)),
+				queryAttr: map[string]string{
+					"after": ruleID1,
+				},
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					rec := httptest.NewRecorder()
+					req := httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/content/", strings.NewReader(""))
+					req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+					routers.Client.ServeHTTP(rec, req)
+					assert.Equal(t, http.StatusOK, rec.Code, rec.Body.String())
+					rules := gjson.ParseBytes(rec.Body.Bytes())
+					for i, rule := range rules.Array() {
+						if rule.Get("rule_id").Str == ruleID1 && i != 0 {
+							t.Fatalf("expected '%s' to be the first, but wasn't", ruleID1)
+						}
+						if rule.Get("rule_id").Str == ruleID2 && i != 1 {
+							t.Fatalf("expected '%s' to be the second, but wasn't", ruleID2)
+						}
+					}
+				},
+			},
+			{
+				name:    "can create new push rule before existing",
+				request: httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/content/myrule3", strings.NewReader(`{"actions":["notify"],"pattern":"world"}`)),
+				queryAttr: map[string]string{
+					"before": ruleID1,
+				},
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					rec := httptest.NewRecorder()
+					req := httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/content/", strings.NewReader(""))
+					req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+					routers.Client.ServeHTTP(rec, req)
+					assert.Equal(t, http.StatusOK, rec.Code, rec.Body.String())
+					rules := gjson.ParseBytes(rec.Body.Bytes())
+					for i, rule := range rules.Array() {
+						if rule.Get("rule_id").Str == ruleID3 && i != 0 {
+							t.Fatalf("expected '%s' to be the first, but wasn't", ruleID3)
+						}
+						if rule.Get("rule_id").Str == ruleID1 && i != 1 {
+							t.Fatalf("expected '%s' to be the second, but wasn't", ruleID1)
+						}
+						if rule.Get("rule_id").Str == ruleID2 && i != 2 {
+							t.Fatalf("expected '%s' to be the third, but wasn't", ruleID1)
+						}
+					}
+				},
+			},
+			{
+				name:           "can modify existing push rule",
+				request:        httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/content/myrule2", strings.NewReader(`{"actions":["dont_notify"],"pattern":"world"}`)),
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					rec := httptest.NewRecorder()
+					req := httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/content/myrule2/actions", strings.NewReader(""))
+					req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+					routers.Client.ServeHTTP(rec, req)
+					assert.Equal(t, http.StatusOK, rec.Code, rec.Body.String())
+					actions := gjson.GetBytes(rec.Body.Bytes(), "actions").Array()
+					// there should only be one action
+					assert.Equal(t, "dont_notify", actions[0].Str)
+				},
+			},
+			{
+				name:    "can move existing push rule to the front",
+				request: httptest.NewRequest(http.MethodPut, "/_matrix/client/v3/pushrules/global/content/myrule2", strings.NewReader(`{"actions":["dont_notify"],"pattern":"world"}`)),
+				queryAttr: map[string]string{
+					"before": ruleID3,
+				},
+				wantStatusCode: http.StatusOK,
+				validateFunc: func(t *testing.T, respBody *bytes.Buffer) {
+					rec := httptest.NewRecorder()
+					req := httptest.NewRequest(http.MethodGet, "/_matrix/client/v3/pushrules/global/content/", strings.NewReader(""))
+					req.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+					routers.Client.ServeHTTP(rec, req)
+					assert.Equal(t, http.StatusOK, rec.Code, rec.Body.String())
+					rules := gjson.ParseBytes(rec.Body.Bytes())
+					for i, rule := range rules.Array() {
+						if rule.Get("rule_id").Str == ruleID2 && i != 0 {
+							t.Fatalf("expected '%s' to be the first, but wasn't", ruleID2)
+						}
+						if rule.Get("rule_id").Str == ruleID3 && i != 1 {
+							t.Fatalf("expected '%s' to be the second, but wasn't", ruleID3)
+						}
+						if rule.Get("rule_id").Str == ruleID1 && i != 2 {
+							t.Fatalf("expected '%s' to be the third, but wasn't", ruleID1)
+						}
+					}
+				},
+			},
+			{
+				name:           "can not delete push rule with invalid scope",
+				request:        httptest.NewRequest(http.MethodDelete, "/_matrix/client/v3/pushrules/invalid/content/myrule2", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not delete push rule with invalid kind",
+				request:        httptest.NewRequest(http.MethodDelete, "/_matrix/client/v3/pushrules/global/invalid/myrule2", strings.NewReader("")),
+				wantStatusCode: http.StatusBadRequest,
+			},
+			{
+				name:           "can not delete push rule with non-existent rule",
+				request:        httptest.NewRequest(http.MethodDelete, "/_matrix/client/v3/pushrules/global/content/doesnotexist", strings.NewReader("")),
+				wantStatusCode: http.StatusNotFound,
+			},
+			{
+				name:           "can delete existing push rule",
+				request:        httptest.NewRequest(http.MethodDelete, "/_matrix/client/v3/pushrules/global/content/myrule2", strings.NewReader("")),
+				wantStatusCode: http.StatusOK,
+			},
+		}
+
+		for _, tc := range testCases {
+			t.Run(tc.name, func(t *testing.T) {
+				rec := httptest.NewRecorder()
+
+				if tc.queryAttr != nil {
+					params := url.Values{}
+					for k, v := range tc.queryAttr {
+						params.Set(k, v)
+					}
+
+					tc.request = httptest.NewRequest(tc.request.Method, tc.request.URL.String()+"?"+params.Encode(), tc.request.Body)
+				}
+
+				tc.request.Header.Set("Authorization", "Bearer "+accessTokens[alice].accessToken)
+
+				routers.Client.ServeHTTP(rec, tc.request)
+				assert.Equal(t, tc.wantStatusCode, rec.Code, rec.Body.String())
+				if tc.validateFunc != nil {
+					tc.validateFunc(t, rec.Body)
+				}
+				t.Logf("%s", rec.Body.String())
+			})
+		}
+	})
+}
diff --git a/clientapi/routing/pushrules.go b/clientapi/routing/pushrules.go
index 856f52c7..f1a539ad 100644
--- a/clientapi/routing/pushrules.go
+++ b/clientapi/routing/pushrules.go
@@ -31,7 +31,7 @@ func errorResponse(ctx context.Context, err error, msg string, args ...interface
 }
 
 func GetAllPushRules(ctx context.Context, device *userapi.Device, userAPI userapi.ClientUserAPI) util.JSONResponse {
-	ruleSets, err := queryPushRules(ctx, device.UserID, userAPI)
+	ruleSets, err := userAPI.QueryPushRules(ctx, device.UserID)
 	if err != nil {
 		return errorResponse(ctx, err, "queryPushRulesJSON failed")
 	}
@@ -42,7 +42,7 @@ func GetAllPushRules(ctx context.Context, device *userapi.Device, userAPI userap
 }
 
 func GetPushRulesByScope(ctx context.Context, scope string, device *userapi.Device, userAPI userapi.ClientUserAPI) util.JSONResponse {
-	ruleSets, err := queryPushRules(ctx, device.UserID, userAPI)
+	ruleSets, err := userAPI.QueryPushRules(ctx, device.UserID)
 	if err != nil {
 		return errorResponse(ctx, err, "queryPushRulesJSON failed")
 	}
@@ -57,7 +57,7 @@ func GetPushRulesByScope(ctx context.Context, scope string, device *userapi.Devi
 }
 
 func GetPushRulesByKind(ctx context.Context, scope, kind string, device *userapi.Device, userAPI userapi.ClientUserAPI) util.JSONResponse {
-	ruleSets, err := queryPushRules(ctx, device.UserID, userAPI)
+	ruleSets, err := userAPI.QueryPushRules(ctx, device.UserID)
 	if err != nil {
 		return errorResponse(ctx, err, "queryPushRules failed")
 	}
@@ -66,7 +66,8 @@ func GetPushRulesByKind(ctx context.Context, scope, kind string, device *userapi
 		return errorResponse(ctx, jsonerror.InvalidArgumentValue("invalid push rule set"), "pushRuleSetByScope failed")
 	}
 	rulesPtr := pushRuleSetKindPointer(ruleSet, pushrules.Kind(kind))
-	if rulesPtr == nil {
+	// Even if rulesPtr is not nil, there may not be any rules for this kind
+	if rulesPtr == nil || (rulesPtr != nil && len(*rulesPtr) == 0) {
 		return errorResponse(ctx, jsonerror.InvalidArgumentValue("invalid push rules kind"), "pushRuleSetKindPointer failed")
 	}
 	return util.JSONResponse{
@@ -76,7 +77,7 @@ func GetPushRulesByKind(ctx context.Context, scope, kind string, device *userapi
 }
 
 func GetPushRuleByRuleID(ctx context.Context, scope, kind, ruleID string, device *userapi.Device, userAPI userapi.ClientUserAPI) util.JSONResponse {
-	ruleSets, err := queryPushRules(ctx, device.UserID, userAPI)
+	ruleSets, err := userAPI.QueryPushRules(ctx, device.UserID)
 	if err != nil {
 		return errorResponse(ctx, err, "queryPushRules failed")
 	}
@@ -101,7 +102,10 @@ func GetPushRuleByRuleID(ctx context.Context, scope, kind, ruleID string, device
 func PutPushRuleByRuleID(ctx context.Context, scope, kind, ruleID, afterRuleID, beforeRuleID string, body io.Reader, device *userapi.Device, userAPI userapi.ClientUserAPI) util.JSONResponse {
 	var newRule pushrules.Rule
 	if err := json.NewDecoder(body).Decode(&newRule); err != nil {
-		return errorResponse(ctx, err, "JSON Decode failed")
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.BadJSON(err.Error()),
+		}
 	}
 	newRule.RuleID = ruleID
 
@@ -110,7 +114,7 @@ func PutPushRuleByRuleID(ctx context.Context, scope, kind, ruleID, afterRuleID,
 		return errorResponse(ctx, jsonerror.InvalidArgumentValue(errs[0].Error()), "rule sanity check failed: %v", errs)
 	}
 
-	ruleSets, err := queryPushRules(ctx, device.UserID, userAPI)
+	ruleSets, err := userAPI.QueryPushRules(ctx, device.UserID)
 	if err != nil {
 		return errorResponse(ctx, err, "queryPushRules failed")
 	}
@@ -120,6 +124,7 @@ func PutPushRuleByRuleID(ctx context.Context, scope, kind, ruleID, afterRuleID,
 	}
 	rulesPtr := pushRuleSetKindPointer(ruleSet, pushrules.Kind(kind))
 	if rulesPtr == nil {
+		// while this should be impossible (ValidateRule would already return an error), better keep it around
 		return errorResponse(ctx, jsonerror.InvalidArgumentValue("invalid push rules kind"), "pushRuleSetKindPointer failed")
 	}
 	i := pushRuleIndexByID(*rulesPtr, ruleID)
@@ -144,7 +149,7 @@ func PutPushRuleByRuleID(ctx context.Context, scope, kind, ruleID, afterRuleID,
 		}
 
 		// Add new rule.
-		i, err := findPushRuleInsertionIndex(*rulesPtr, afterRuleID, beforeRuleID)
+		i, err = findPushRuleInsertionIndex(*rulesPtr, afterRuleID, beforeRuleID)
 		if err != nil {
 			return errorResponse(ctx, err, "findPushRuleInsertionIndex failed")
 		}
@@ -153,7 +158,7 @@ func PutPushRuleByRuleID(ctx context.Context, scope, kind, ruleID, afterRuleID,
 		util.GetLogger(ctx).WithField("after", afterRuleID).WithField("before", beforeRuleID).Infof("Added new push rule at %d", i)
 	}
 
-	if err := putPushRules(ctx, device.UserID, ruleSets, userAPI); err != nil {
+	if err = userAPI.PerformPushRulesPut(ctx, device.UserID, ruleSets); err != nil {
 		return errorResponse(ctx, err, "putPushRules failed")
 	}
 
@@ -161,7 +166,7 @@ func PutPushRuleByRuleID(ctx context.Context, scope, kind, ruleID, afterRuleID,
 }
 
 func DeletePushRuleByRuleID(ctx context.Context, scope, kind, ruleID string, device *userapi.Device, userAPI userapi.ClientUserAPI) util.JSONResponse {
-	ruleSets, err := queryPushRules(ctx, device.UserID, userAPI)
+	ruleSets, err := userAPI.QueryPushRules(ctx, device.UserID)
 	if err != nil {
 		return errorResponse(ctx, err, "queryPushRules failed")
 	}
@@ -180,7 +185,7 @@ func DeletePushRuleByRuleID(ctx context.Context, scope, kind, ruleID string, dev
 
 	*rulesPtr = append((*rulesPtr)[:i], (*rulesPtr)[i+1:]...)
 
-	if err := putPushRules(ctx, device.UserID, ruleSets, userAPI); err != nil {
+	if err = userAPI.PerformPushRulesPut(ctx, device.UserID, ruleSets); err != nil {
 		return errorResponse(ctx, err, "putPushRules failed")
 	}
 
@@ -192,7 +197,7 @@ func GetPushRuleAttrByRuleID(ctx context.Context, scope, kind, ruleID, attr stri
 	if err != nil {
 		return errorResponse(ctx, err, "pushRuleAttrGetter failed")
 	}
-	ruleSets, err := queryPushRules(ctx, device.UserID, userAPI)
+	ruleSets, err := userAPI.QueryPushRules(ctx, device.UserID)
 	if err != nil {
 		return errorResponse(ctx, err, "queryPushRules failed")
 	}
@@ -238,7 +243,7 @@ func PutPushRuleAttrByRuleID(ctx context.Context, scope, kind, ruleID, attr stri
 		return errorResponse(ctx, err, "pushRuleAttrSetter failed")
 	}
 
-	ruleSets, err := queryPushRules(ctx, device.UserID, userAPI)
+	ruleSets, err := userAPI.QueryPushRules(ctx, device.UserID)
 	if err != nil {
 		return errorResponse(ctx, err, "queryPushRules failed")
 	}
@@ -258,7 +263,7 @@ func PutPushRuleAttrByRuleID(ctx context.Context, scope, kind, ruleID, attr stri
 	if !reflect.DeepEqual(attrGet((*rulesPtr)[i]), attrGet(&newPartialRule)) {
 		attrSet((*rulesPtr)[i], &newPartialRule)
 
-		if err := putPushRules(ctx, device.UserID, ruleSets, userAPI); err != nil {
+		if err = userAPI.PerformPushRulesPut(ctx, device.UserID, ruleSets); err != nil {
 			return errorResponse(ctx, err, "putPushRules failed")
 		}
 	}
@@ -266,28 +271,6 @@ func PutPushRuleAttrByRuleID(ctx context.Context, scope, kind, ruleID, attr stri
 	return util.JSONResponse{Code: http.StatusOK, JSON: struct{}{}}
 }
 
-func queryPushRules(ctx context.Context, userID string, userAPI userapi.ClientUserAPI) (*pushrules.AccountRuleSets, error) {
-	var res userapi.QueryPushRulesResponse
-	if err := userAPI.QueryPushRules(ctx, &userapi.QueryPushRulesRequest{UserID: userID}, &res); err != nil {
-		util.GetLogger(ctx).WithError(err).Error("userAPI.QueryPushRules failed")
-		return nil, err
-	}
-	return res.RuleSets, nil
-}
-
-func putPushRules(ctx context.Context, userID string, ruleSets *pushrules.AccountRuleSets, userAPI userapi.ClientUserAPI) error {
-	req := userapi.PerformPushRulesPutRequest{
-		UserID:   userID,
-		RuleSets: ruleSets,
-	}
-	var res struct{}
-	if err := userAPI.PerformPushRulesPut(ctx, &req, &res); err != nil {
-		util.GetLogger(ctx).WithError(err).Error("userAPI.PerformPushRulesPut failed")
-		return err
-	}
-	return nil
-}
-
 func pushRuleSetByScope(ruleSets *pushrules.AccountRuleSets, scope pushrules.Scope) *pushrules.RuleSet {
 	switch scope {
 	case pushrules.GlobalScope:
diff --git a/internal/pushrules/validate.go b/internal/pushrules/validate.go
index f50c51bd..b54ec3fb 100644
--- a/internal/pushrules/validate.go
+++ b/internal/pushrules/validate.go
@@ -10,6 +10,10 @@ import (
 func ValidateRule(kind Kind, rule *Rule) []error {
 	var errs []error
 
+	if len(rule.RuleID) > 0 && rule.RuleID[:1] == "." {
+		errs = append(errs, fmt.Errorf("invalid rule ID: rule can not start with a dot"))
+	}
+
 	if !validRuleIDRE.MatchString(rule.RuleID) {
 		errs = append(errs, fmt.Errorf("invalid rule ID: %s", rule.RuleID))
 	}
diff --git a/userapi/api/api.go b/userapi/api/api.go
index ba1c374f..7c47efd2 100644
--- a/userapi/api/api.go
+++ b/userapi/api/api.go
@@ -90,7 +90,7 @@ type ClientUserAPI interface {
 	QueryDevices(ctx context.Context, req *QueryDevicesRequest, res *QueryDevicesResponse) error
 	QueryAccountData(ctx context.Context, req *QueryAccountDataRequest, res *QueryAccountDataResponse) error
 	QueryPushers(ctx context.Context, req *QueryPushersRequest, res *QueryPushersResponse) error
-	QueryPushRules(ctx context.Context, req *QueryPushRulesRequest, res *QueryPushRulesResponse) error
+	QueryPushRules(ctx context.Context, userID string) (*pushrules.AccountRuleSets, error)
 	QueryAccountAvailability(ctx context.Context, req *QueryAccountAvailabilityRequest, res *QueryAccountAvailabilityResponse) error
 	PerformAccountCreation(ctx context.Context, req *PerformAccountCreationRequest, res *PerformAccountCreationResponse) error
 	PerformDeviceCreation(ctx context.Context, req *PerformDeviceCreationRequest, res *PerformDeviceCreationResponse) error
@@ -99,7 +99,7 @@ type ClientUserAPI interface {
 	PerformPasswordUpdate(ctx context.Context, req *PerformPasswordUpdateRequest, res *PerformPasswordUpdateResponse) error
 	PerformPusherDeletion(ctx context.Context, req *PerformPusherDeletionRequest, res *struct{}) error
 	PerformPusherSet(ctx context.Context, req *PerformPusherSetRequest, res *struct{}) error
-	PerformPushRulesPut(ctx context.Context, req *PerformPushRulesPutRequest, res *struct{}) error
+	PerformPushRulesPut(ctx context.Context, userID string, ruleSets *pushrules.AccountRuleSets) error
 	PerformAccountDeactivation(ctx context.Context, req *PerformAccountDeactivationRequest, res *PerformAccountDeactivationResponse) error
 	PerformOpenIDTokenCreation(ctx context.Context, req *PerformOpenIDTokenCreationRequest, res *PerformOpenIDTokenCreationResponse) error
 	QueryNotifications(ctx context.Context, req *QueryNotificationsRequest, res *QueryNotificationsResponse) error
@@ -555,19 +555,6 @@ const (
 	HTTPKind  PusherKind = "http"
 )
 
-type PerformPushRulesPutRequest struct {
-	UserID   string                     `json:"user_id"`
-	RuleSets *pushrules.AccountRuleSets `json:"rule_sets"`
-}
-
-type QueryPushRulesRequest struct {
-	UserID string `json:"user_id"`
-}
-
-type QueryPushRulesResponse struct {
-	RuleSets *pushrules.AccountRuleSets `json:"rule_sets"`
-}
-
 type QueryNotificationsRequest struct {
 	Localpart  string                       `json:"localpart"`   // Required.
 	ServerName gomatrixserverlib.ServerName `json:"server_name"` // Required.
diff --git a/userapi/internal/user_api.go b/userapi/internal/user_api.go
index 6dad91dd..139ca758 100644
--- a/userapi/internal/user_api.go
+++ b/userapi/internal/user_api.go
@@ -26,6 +26,7 @@ import (
 	appserviceAPI "github.com/matrix-org/dendrite/appservice/api"
 	"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
 	fedsenderapi "github.com/matrix-org/dendrite/federationapi/api"
+	"github.com/matrix-org/dendrite/internal/pushrules"
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
 	"github.com/sirupsen/logrus"
@@ -872,36 +873,28 @@ func (a *UserInternalAPI) QueryPushers(ctx context.Context, req *api.QueryPusher
 
 func (a *UserInternalAPI) PerformPushRulesPut(
 	ctx context.Context,
-	req *api.PerformPushRulesPutRequest,
-	_ *struct{},
+	userID string,
+	ruleSets *pushrules.AccountRuleSets,
 ) error {
-	bs, err := json.Marshal(&req.RuleSets)
+	bs, err := json.Marshal(ruleSets)
 	if err != nil {
 		return err
 	}
 	userReq := api.InputAccountDataRequest{
-		UserID:      req.UserID,
+		UserID:      userID,
 		DataType:    pushRulesAccountDataType,
 		AccountData: json.RawMessage(bs),
 	}
 	var userRes api.InputAccountDataResponse // empty
-	if err := a.InputAccountData(ctx, &userReq, &userRes); err != nil {
-		return err
-	}
-	return nil
+	return a.InputAccountData(ctx, &userReq, &userRes)
 }
 
-func (a *UserInternalAPI) QueryPushRules(ctx context.Context, req *api.QueryPushRulesRequest, res *api.QueryPushRulesResponse) error {
-	localpart, domain, err := gomatrixserverlib.SplitID('@', req.UserID)
-	if err != nil {
-		return fmt.Errorf("failed to split user ID %q for push rules", req.UserID)
-	}
-	pushRules, err := a.DB.QueryPushRules(ctx, localpart, domain)
+func (a *UserInternalAPI) QueryPushRules(ctx context.Context, userID string) (*pushrules.AccountRuleSets, error) {
+	localpart, domain, err := gomatrixserverlib.SplitID('@', userID)
 	if err != nil {
-		return fmt.Errorf("failed to query push rules: %w", err)
+		return nil, fmt.Errorf("failed to split user ID %q for push rules", userID)
 	}
-	res.RuleSets = pushRules
-	return nil
+	return a.DB.QueryPushRules(ctx, localpart, domain)
 }
 
 func (a *UserInternalAPI) SetAvatarURL(ctx context.Context, localpart string, serverName gomatrixserverlib.ServerName, avatarURL string) (*authtypes.Profile, bool, error) {