Refactor arrtrix webhook to use fixed path and remove legacy config

- Switch arrtrix webhook to a fixed path: /_arrtrix/webhook
- Remove Radarr-specific and secret-based config from arrtrix
- Simplify connector and webhook handler logic
- Update NixOS module to drop legacy webhook config
- Add new tests for generic arrtrix webhook handler

.editorconfig

@@ -0,0 +1,6 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8

.gitattributes

@@ -1,4 +1 @@
-* text=auto
-core.autocrlf=false
-core.eol=lf
-core.filemode=false
+* text=auto eol=lf

modules/nixos/services/communication/matrix/default.nix

@@ -18,7 +18,7 @@
   keyFile = "/var/lib/element-call/key";
 
   mkMautrix = bridge: i: conf: {
-    ${bridge} =
+    ${bridge} = mkMerge [
       {
         enable = true;
         registerToSynapse = true;
@@ -43,7 +43,8 @@
           };
         };
       }
-      // conf;
+      conf
+    ];
   };
 in {
   options.${namespace}.services.communication.matrix = {
@@ -110,7 +111,13 @@ in {
       (mkMautrix "mautrix-signal" 1 {})
       (mkMautrix "mautrix-telegram" 2 {})
       (mkMautrix "mautrix-whatsapp" 3 {})
-      (mkMautrix "arrtrix" 4 {})
+      (mkMautrix "arrtrix" 4 {
+        settings.network.webhooks.radarr = {
+          enabled = true;
+          path = "/_arrtrix/webhooks/radarr";
+          secret = "";
+        };
+      })
       {
         matrix-synapse = {
           enable = true;

modules/nixos/temp/services/arrtrix/default.nix

@@ -15,11 +15,6 @@
   settingsFormat = pkgs.formats.json {};
 
   defaultConfig = {
-    network.webhooks.radarr = {
-      enabled = false;
-      path = "/_arrtrix/webhooks/radarr";
-      secret = "";
-    };
     bridge = {
       command_prefix = "!arr";
       relay.enabled = true;

packages/arrtrix/pkg/config/config_test.go

@@ -120,3 +120,40 @@ encryption:
 		t.Fatalf("expected hidden double puppet secrets to stay internal-only")
 	}
 }
+
+func TestLoadIgnoresLegacyWebhookSettings(t *testing.T) {
+	cfg, err := Load([]byte(`
+network:
+  webhooks:
+    radarr:
+      enabled: true
+      path: /_arrtrix/webhooks/radarr
+      secret: legacy-secret
+bridge:
+  command_prefix: "!arr"
+homeserver:
+  address: http://127.0.0.1:8008
+  domain: test.local
+appservice:
+  id: arrtrix
+  bot:
+    username: arrtrixbot
+    displayname: Arrtrix Bot
+  username_template: arrtrix_{{.}}
+database:
+  type: sqlite3-fk-wal
+  uri: file:arrtrix.db?_txlock=immediate
+logging:
+  min_level: info
+  writers:
+    - type: stdout
+      format: pretty-colored
+`))
+	if err != nil {
+		t.Fatalf("Load returned error: %v", err)
+	}
+
+	if cfg == nil {
+		t.Fatal("expected config to load")
+	}
+}

packages/arrtrix/pkg/connector/config.go

@@ -14,40 +14,23 @@ import (
 //go:embed example-config.yaml
 var ExampleConfig string
 
-type Config struct {
-	Webhooks WebhooksConfig `yaml:"webhooks"`
-}
-
-type WebhooksConfig struct {
-	Radarr webhook.RadarrConfig `yaml:"radarr"`
-}
-
-func (c *Config) applyDefaults() {
-	c.Webhooks.Radarr.ApplyDefaults()
-}
-
-func (c *Config) Validate() error {
-	return c.Webhooks.Radarr.Validate()
-}
+type Config struct{}
 
 func upgradeConfig(helper up.Helper) {}
 
 func (s *ArrtrixConnector) GetConfig() (string, any, up.Upgrader) {
-	s.Config.applyDefaults()
 	return ExampleConfig, &s.Config, up.SimpleUpgrader(upgradeConfig)
 }
 
 func (s *ArrtrixConnector) ValidateConfig() error {
-	s.Config.applyDefaults()
-	return s.Config.Validate()
+	return nil
 }
 
 func (s *ArrtrixConnector) MountRoutes(router *http.ServeMux) error {
-	s.Config.applyDefaults()
 	if s.Bridge == nil {
 		return fmt.Errorf("bridge is not initialized")
 	}
-	return webhook.MountRadarr(router, s.Bridge, s.Config.Webhooks.Radarr)
+	return webhook.MountArr(router, s.Bridge)
 }
 
 var _ bridgev2.ConfigValidatingNetwork = (*ArrtrixConnector)(nil)

packages/arrtrix/pkg/connector/config_test.go

@@ -1,23 +0,0 @@
-package connector
-
-import "testing"
-
-func TestConfigDefaultsApplyRadarrWebhookPath(t *testing.T) {
-	var cfg Config
-
-	cfg.applyDefaults()
-
-	if cfg.Webhooks.Radarr.Path == "" {
-		t.Fatal("expected radarr webhook path default to be set")
-	}
-}
-
-func TestConfigValidateRejectsEnabledWebhookWithoutSecret(t *testing.T) {
-	cfg := Config{}
-	cfg.Webhooks.Radarr.Enabled = true
-	cfg.applyDefaults()
-
-	if err := cfg.Validate(); err == nil {
-		t.Fatal("expected missing secret to fail validation")
-	}
-}

packages/arrtrix/pkg/connector/example-config.yaml

@@ -1,10 +1,4 @@
-# Arrtrix-specific runtime options.
+# No network-specific config is required yet.
 #
-webhooks:
-  radarr:
-    enabled: false
-    path: /_arrtrix/webhooks/radarr
-    secret: ""
-    # The first implementation delivers notifications to the only configured
-    # management room. If more than one management room exists, the webhook is
-    # rejected until routing is configured more explicitly.
+# Arr-stack webhooks are exposed automatically on the fixed built-in path:
+#   POST /_arrtrix/webhook

packages/arrtrix/pkg/webhook/arr.go

@@ -14,30 +14,21 @@ import (
 	"maunium.net/go/mautrix/id"
 )
 
-const (
-	defaultRadarrWebhookPath = "/_arrtrix/webhooks/radarr"
-	radarrSecretHeader       = "X-Arrtrix-Webhook-Secret"
-)
+const ArrWebhookPath = "/_arrtrix/webhook"
 
 var (
 	ErrNoManagementRoom        = errors.New("no management room configured")
 	ErrAmbiguousManagementRoom = errors.New("multiple management rooms configured")
 )
 
-type RadarrConfig struct {
-	Enabled bool   `yaml:"enabled"`
-	Path    string `yaml:"path"`
-	Secret  string `yaml:"secret"`
+type payload struct {
+	EventType string     `json:"eventType"`
+	Movie     *movie     `json:"movie"`
+	MovieFile *movieFile `json:"movieFile"`
+	IsUpgrade bool       `json:"isUpgrade"`
 }
 
-type radarrPayload struct {
-	EventType string           `json:"eventType"`
-	Movie     *radarrMovie     `json:"movie"`
-	MovieFile *radarrMovieFile `json:"movieFile"`
-	IsUpgrade bool             `json:"isUpgrade"`
-}
-
-type radarrMovie struct {
+type movie struct {
 	Title  string `json:"title"`
 	Year   int    `json:"year"`
 	ImdbID string `json:"imdbId"`
@@ -45,7 +36,7 @@ type radarrMovie struct {
 	Path   string `json:"path"`
 }
 
-type radarrMovieFile struct {
+type movieFile struct {
 	Quality      string `json:"quality"`
 	RelativePath string `json:"relativePath"`
 	SceneName    string `json:"sceneName"`
@@ -60,62 +51,30 @@ type noticeSender interface {
 	SendNotice(context.Context, id.RoomID, string) error
 }
 
-type RadarrHandler struct {
-	config   RadarrConfig
+type ArrHandler struct {
 	resolver roomResolver
 	sender   noticeSender
 }
 
-func (c *RadarrConfig) ApplyDefaults() {
-	if c.Path == "" {
-		c.Path = defaultRadarrWebhookPath
+func MountArr(router *http.ServeMux, bridge *bridgev2.Bridge) error {
+	if bridge == nil {
+		return fmt.Errorf("bridge is not initialized")
 	}
-}
-
-func (c *RadarrConfig) Validate() error {
-	c.ApplyDefaults()
-	if !c.Enabled {
-		return nil
-	}
-	if !strings.HasPrefix(c.Path, "/") {
-		return fmt.Errorf("network.webhooks.radarr.path must start with /")
-	}
-	if strings.TrimSpace(c.Secret) == "" {
-		return fmt.Errorf("network.webhooks.radarr.secret must be set when the webhook is enabled")
-	}
-	return nil
-}
-
-func MountRadarr(router *http.ServeMux, bridge *bridgev2.Bridge, cfg RadarrConfig) error {
-	cfg.ApplyDefaults()
-	if !cfg.Enabled {
-		return nil
-	}
-	if err := cfg.Validate(); err != nil {
-		return err
-	}
-
-	handler := &RadarrHandler{
-		config:   cfg,
+	handler := &ArrHandler{
 		resolver: bridgeRoomResolver{bridge: bridge},
 		sender:   bridgeNoticeSender{bridge: bridge},
 	}
-	router.Handle(fmt.Sprintf("POST %s", cfg.Path), handler)
+	router.Handle(fmt.Sprintf("POST %s", ArrWebhookPath), handler)
 	return nil
 }
 
-func (h *RadarrHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	if !authorized(r, h.config.Secret) {
-		http.Error(w, "invalid webhook secret", http.StatusUnauthorized)
-		return
-	}
-
-	var payload radarrPayload
-	if err := json.NewDecoder(r.Body).Decode(&payload); err != nil {
+func (h *ArrHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	var body payload
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
 		http.Error(w, "invalid webhook payload", http.StatusBadRequest)
 		return
 	}
-	if strings.TrimSpace(payload.EventType) == "" {
+	if strings.TrimSpace(body.EventType) == "" {
 		http.Error(w, "missing eventType", http.StatusBadRequest)
 		return
 	}
@@ -130,7 +89,7 @@ func (h *RadarrHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if err = h.sender.SendNotice(r.Context(), roomID, renderRadarrNotice(payload)); err != nil {
+	if err = h.sender.SendNotice(r.Context(), roomID, renderNotice(body)); err != nil {
 		http.Error(w, "failed to deliver webhook", http.StatusBadGateway)
 		return
 	}
@@ -164,6 +123,7 @@ func (r bridgeRoomResolver) ResolveManagementRoom(ctx context.Context) (id.RoomI
 	if err = rows.Err(); err != nil {
 		return "", fmt.Errorf("failed to iterate management rooms: %w", err)
 	}
+
 	switch len(owners) {
 	case 0:
 		return "", ErrNoManagementRoom
@@ -187,43 +147,30 @@ func (s bridgeNoticeSender) SendNotice(ctx context.Context, roomID id.RoomID, ma
 	return err
 }
 
-func authorized(r *http.Request, secret string) bool {
-	if secret == "" {
-		return true
-	}
-	if r.Header.Get(radarrSecretHeader) == secret {
-		return true
-	}
-	if bearer := strings.TrimPrefix(r.Header.Get("Authorization"), "Bearer "); bearer == secret && bearer != r.Header.Get("Authorization") {
-		return true
-	}
-	return r.URL.Query().Get("secret") == secret
-}
-
-func renderRadarrNotice(payload radarrPayload) string {
-	title := "Radarr"
-	if payload.Movie != nil {
-		title = payload.Movie.Title
-		if payload.Movie.Year != 0 {
-			title = fmt.Sprintf("%s (%d)", title, payload.Movie.Year)
+func renderNotice(body payload) string {
+	title := "Arr"
+	if body.Movie != nil {
+		title = body.Movie.Title
+		if body.Movie.Year != 0 {
+			title = fmt.Sprintf("%s (%d)", title, body.Movie.Year)
 		}
 	}
 
-	lines := []string{fmt.Sprintf("**Radarr %s**", payload.EventType)}
-	if title != "Radarr" {
+	lines := []string{fmt.Sprintf("**Arr %s**", body.EventType)}
+	if title != "Arr" {
 		lines = append(lines, fmt.Sprintf("Movie: %s", title))
 	}
-	if payload.MovieFile != nil && payload.MovieFile.Quality != "" {
-		lines = append(lines, fmt.Sprintf("Quality: %s", payload.MovieFile.Quality))
+	if body.MovieFile != nil && body.MovieFile.Quality != "" {
+		lines = append(lines, fmt.Sprintf("Quality: %s", body.MovieFile.Quality))
 	}
-	if payload.MovieFile != nil && payload.MovieFile.RelativePath != "" {
-		lines = append(lines, fmt.Sprintf("File: `%s`", payload.MovieFile.RelativePath))
+	if body.MovieFile != nil && body.MovieFile.RelativePath != "" {
+		lines = append(lines, fmt.Sprintf("File: `%s`", body.MovieFile.RelativePath))
 	}
-	if payload.EventType == "Download" {
-		lines = append(lines, fmt.Sprintf("Upgrade: %t", payload.IsUpgrade))
+	if body.EventType == "Download" {
+		lines = append(lines, fmt.Sprintf("Upgrade: %t", body.IsUpgrade))
 	}
-	if payload.Movie != nil && payload.Movie.ImdbID != "" {
-		lines = append(lines, fmt.Sprintf("IMDb: `%s`", payload.Movie.ImdbID))
+	if body.Movie != nil && body.Movie.ImdbID != "" {
+		lines = append(lines, fmt.Sprintf("IMDb: `%s`", body.Movie.ImdbID))
 	}
 	return strings.Join(lines, "\n")
 }
@@ -238,4 +185,4 @@ func convertUserIDs(users []id.UserID) []string {
 
 var _ roomResolver = bridgeRoomResolver{}
 var _ noticeSender = bridgeNoticeSender{}
-var _ http.Handler = (*RadarrHandler)(nil)
+var _ http.Handler = (*ArrHandler)(nil)

packages/arrtrix/pkg/webhook/arr_test.go

@@ -0,0 +1,114 @@
+package webhook
+
+import (
+	"context"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"maunium.net/go/mautrix/id"
+)
+
+type stubRoomResolver struct {
+	roomID id.RoomID
+	err    error
+}
+
+func (s stubRoomResolver) ResolveManagementRoom(context.Context) (id.RoomID, error) {
+	return s.roomID, s.err
+}
+
+type stubNoticeSender struct {
+	roomID  id.RoomID
+	message string
+	err     error
+}
+
+func (s *stubNoticeSender) SendNotice(_ context.Context, roomID id.RoomID, message string) error {
+	s.roomID = roomID
+	s.message = message
+	return s.err
+}
+
+func TestMountArrRequiresBridge(t *testing.T) {
+	router := http.NewServeMux()
+	if err := MountArr(router, nil); err == nil {
+		t.Fatal("expected nil bridge to fail")
+	}
+}
+
+func TestArrHandlerDeliversNotice(t *testing.T) {
+	sender := &stubNoticeSender{}
+	handler := &ArrHandler{
+		resolver: stubRoomResolver{roomID: "!room:test"},
+		sender:   sender,
+	}
+
+	req := httptest.NewRequest(http.MethodPost, ArrWebhookPath, strings.NewReader(`{"eventType":"Download","movie":{"title":"Dune","year":2021,"imdbId":"tt1160419"},"movieFile":{"quality":"1080p","relativePath":"Dune (2021)/Dune.mkv"},"isUpgrade":false}`))
+	rec := httptest.NewRecorder()
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusAccepted {
+		t.Fatalf("expected accepted status, got %d", rec.Code)
+	}
+	if sender.roomID != "!room:test" {
+		t.Fatalf("expected notice sent to management room, got %q", sender.roomID)
+	}
+	if !strings.Contains(sender.message, "**Arr Download**") || !strings.Contains(sender.message, "Dune (2021)") {
+		t.Fatalf("unexpected message: %s", sender.message)
+	}
+}
+
+func TestArrHandlerReportsAmbiguousManagementRoom(t *testing.T) {
+	handler := &ArrHandler{
+		resolver: stubRoomResolver{err: ErrAmbiguousManagementRoom},
+		sender:   &stubNoticeSender{},
+	}
+
+	req := httptest.NewRequest(http.MethodPost, ArrWebhookPath, strings.NewReader(`{"eventType":"Test"}`))
+	rec := httptest.NewRecorder()
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusConflict {
+		t.Fatalf("expected conflict status, got %d", rec.Code)
+	}
+}
+
+func TestRenderNoticeForTestEvent(t *testing.T) {
+	msg := renderNotice(payload{EventType: "Test"})
+	if strings.TrimSpace(msg) != "**Arr Test**" {
+		t.Fatalf("unexpected test-event message: %q", msg)
+	}
+}
+
+func TestArrHandlerReturnsBadGatewayOnSendFailure(t *testing.T) {
+	handler := &ArrHandler{
+		resolver: stubRoomResolver{roomID: "!room:test"},
+		sender:   &stubNoticeSender{err: errors.New("send failed")},
+	}
+
+	req := httptest.NewRequest(http.MethodPost, ArrWebhookPath, strings.NewReader(`{"eventType":"Test"}`))
+	rec := httptest.NewRecorder()
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusBadGateway {
+		t.Fatalf("expected bad gateway status, got %d", rec.Code)
+	}
+}
+
+func TestArrHandlerRejectsMissingEventType(t *testing.T) {
+	handler := &ArrHandler{
+		resolver: stubRoomResolver{roomID: "!room:test"},
+		sender:   &stubNoticeSender{},
+	}
+
+	req := httptest.NewRequest(http.MethodPost, ArrWebhookPath, strings.NewReader(`{"movie":{"title":"Dune"}}`))
+	rec := httptest.NewRecorder()
+	handler.ServeHTTP(rec, req)
+
+	if rec.Code != http.StatusBadRequest {
+		t.Fatalf("expected bad request status, got %d", rec.Code)
+	}
+}

packages/arrtrix/pkg/webhook/radarr_test.go

@@ -1,131 +0,0 @@
-package webhook
-
-import (
-	"context"
-	"errors"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-
-	"maunium.net/go/mautrix/id"
-)
-
-type stubRoomResolver struct {
-	roomID id.RoomID
-	err    error
-}
-
-func (s stubRoomResolver) ResolveManagementRoom(context.Context) (id.RoomID, error) {
-	return s.roomID, s.err
-}
-
-type stubNoticeSender struct {
-	roomID  id.RoomID
-	message string
-	err     error
-}
-
-func (s *stubNoticeSender) SendNotice(_ context.Context, roomID id.RoomID, message string) error {
-	s.roomID = roomID
-	s.message = message
-	return s.err
-}
-
-func TestRadarrConfigDefaultsAndValidation(t *testing.T) {
-	cfg := RadarrConfig{Enabled: true, Secret: "secret"}
-	cfg.ApplyDefaults()
-	if cfg.Path != defaultRadarrWebhookPath {
-		t.Fatalf("expected default path %q, got %q", defaultRadarrWebhookPath, cfg.Path)
-	}
-	if err := cfg.Validate(); err != nil {
-		t.Fatalf("expected config to validate, got %v", err)
-	}
-}
-
-func TestRadarrConfigRequiresSecretWhenEnabled(t *testing.T) {
-	cfg := RadarrConfig{Enabled: true}
-	if err := cfg.Validate(); err == nil {
-		t.Fatal("expected missing secret to fail validation")
-	}
-}
-
-func TestRadarrHandlerRejectsUnauthorizedRequests(t *testing.T) {
-	handler := &RadarrHandler{
-		config:   RadarrConfig{Enabled: true, Secret: "secret"},
-		resolver: stubRoomResolver{roomID: "!room:test"},
-		sender:   &stubNoticeSender{},
-	}
-
-	req := httptest.NewRequest(http.MethodPost, defaultRadarrWebhookPath, strings.NewReader(`{"eventType":"Test"}`))
-	rec := httptest.NewRecorder()
-	handler.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusUnauthorized {
-		t.Fatalf("expected unauthorized status, got %d", rec.Code)
-	}
-}
-
-func TestRadarrHandlerDeliversNotice(t *testing.T) {
-	sender := &stubNoticeSender{}
-	handler := &RadarrHandler{
-		config:   RadarrConfig{Enabled: true, Secret: "secret"},
-		resolver: stubRoomResolver{roomID: "!room:test"},
-		sender:   sender,
-	}
-
-	req := httptest.NewRequest(http.MethodPost, defaultRadarrWebhookPath+"?secret=secret", strings.NewReader(`{"eventType":"Download","movie":{"title":"Dune","year":2021,"imdbId":"tt1160419"},"movieFile":{"quality":"1080p","relativePath":"Dune (2021)/Dune.mkv"},"isUpgrade":false}`))
-	rec := httptest.NewRecorder()
-	handler.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusAccepted {
-		t.Fatalf("expected accepted status, got %d", rec.Code)
-	}
-	if sender.roomID != "!room:test" {
-		t.Fatalf("expected notice sent to management room, got %q", sender.roomID)
-	}
-	if !strings.Contains(sender.message, "**Radarr Download**") || !strings.Contains(sender.message, "Dune (2021)") {
-		t.Fatalf("unexpected message: %s", sender.message)
-	}
-}
-
-func TestRadarrHandlerReportsAmbiguousManagementRoom(t *testing.T) {
-	handler := &RadarrHandler{
-		config:   RadarrConfig{Enabled: true, Secret: "secret"},
-		resolver: stubRoomResolver{err: ErrAmbiguousManagementRoom},
-		sender:   &stubNoticeSender{},
-	}
-
-	req := httptest.NewRequest(http.MethodPost, defaultRadarrWebhookPath, strings.NewReader(`{"eventType":"Test"}`))
-	req.Header.Set(radarrSecretHeader, "secret")
-	rec := httptest.NewRecorder()
-	handler.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusConflict {
-		t.Fatalf("expected conflict status, got %d", rec.Code)
-	}
-}
-
-func TestRenderRadarrNoticeForTestEvent(t *testing.T) {
-	msg := renderRadarrNotice(radarrPayload{EventType: "Test"})
-	if strings.TrimSpace(msg) != "**Radarr Test**" {
-		t.Fatalf("unexpected test-event message: %q", msg)
-	}
-}
-
-func TestRadarrHandlerReturnsBadGatewayOnSendFailure(t *testing.T) {
-	handler := &RadarrHandler{
-		config:   RadarrConfig{Enabled: true, Secret: "secret"},
-		resolver: stubRoomResolver{roomID: "!room:test"},
-		sender:   &stubNoticeSender{err: errors.New("send failed")},
-	}
-
-	req := httptest.NewRequest(http.MethodPost, defaultRadarrWebhookPath, strings.NewReader(`{"eventType":"Test"}`))
-	req.Header.Set(radarrSecretHeader, "secret")
-	rec := httptest.NewRecorder()
-	handler.ServeHTTP(rec, req)
-
-	if rec.Code != http.StatusBadGateway {
-		t.Fatalf("expected bad gateway status, got %d", rec.Code)
-	}
-}