feat: add client call feature switches

server/im_agora_http.go

@@ -20,6 +20,8 @@ const (
 	imReasonCallNotFound       = "CALL_NOT_FOUND"
 	imReasonCallNotAllowed     = "CALL_NOT_ALLOWED"
 	imReasonCallStateInvalid   = "CALL_STATE_INVALID"
+
+	imClientFeatureConfigGroup = "im_client_feature"
 )
 
 type imCallRTCJoinRequest struct {
@@ -189,6 +191,46 @@ func loadIMAgoraConfig() (imAgoraConfig, error) {
 	return config, nil
 }
 
+func imCallFeatureFlags() (bool, bool) {
+	runtimeEnabled := imCallRuntimeEnabled()
+	if !runtimeEnabled || store.ThirdPartyConfig == nil {
+		return false, false
+	}
+	values, err := store.ThirdPartyConfig.Get(imClientFeatureConfigGroup, "audio_call_enabled", "video_call_enabled")
+	if err != nil {
+		return false, false
+	}
+	return imTruthy(values["audio_call_enabled"]), imTruthy(values["video_call_enabled"])
+}
+
+func imCallRuntimeEnabled() bool {
+	webrtcEnabled := len(globals.iceServers) > 0
+	agoraEnabled := false
+	if config, err := loadIMAgoraConfig(); err == nil {
+		agoraEnabled = config.Enabled
+	}
+	return webrtcEnabled || agoraEnabled
+}
+
+func imCallFeatureEnabled() bool {
+	audioCall, videoCall := imCallFeatureFlags()
+	return audioCall || videoCall
+}
+
+func imCallTimeoutSeconds() int {
+	if globals.callEstablishmentTimeout > 0 {
+		return globals.callEstablishmentTimeout
+	}
+	if imCallFeatureEnabled() {
+		return defaultCallEstablishmentTimeout
+	}
+	return 0
+}
+
+func imCanCall(allowed bool) bool {
+	return allowed && imCallFeatureEnabled()
+}
+
 func findCallRecordForRTCJoin(tenantID types.TenantID, uid types.Uid, body imCallRTCJoinRequest) (*types.CallRecord, error) {
 	if store.Calls == nil {
 		return nil, types.ErrUnsupported