001/*-
002 * #%L
003 * HAPI FHIR Subscription Server
004 * %%
005 * Copyright (C) 2014 - 2024 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.jpa.subscription.match.deliver.websocket;
021
022import ca.uhn.fhir.jpa.subscription.match.registry.ActiveSubscription;
023import ca.uhn.fhir.jpa.subscription.match.registry.SubscriptionRegistry;
024import ca.uhn.fhir.jpa.subscription.model.CanonicalSubscriptionChannelType;
025import jakarta.annotation.Nonnull;
026import org.hl7.fhir.r4.model.IdType;
027import org.slf4j.Logger;
028import org.slf4j.LoggerFactory;
029import org.springframework.beans.factory.annotation.Autowired;
030
031public class WebsocketConnectionValidator {
032        private static Logger ourLog = LoggerFactory.getLogger(WebsocketConnectionValidator.class);
033
034        @Autowired
035        SubscriptionRegistry mySubscriptionRegistry;
036
037        /**
038         * Constructor
039         */
040        public WebsocketConnectionValidator() {
041                super();
042        }
043
044        public WebsocketValidationResponse validate(@Nonnull IdType id) {
045                if (!id.hasIdPart() || !id.isIdPartValid()) {
046                        return WebsocketValidationResponse.INVALID_RESPONSE(
047                                        "Invalid bind request - No ID included: " + id.getValue());
048                }
049
050                if (!id.hasResourceType()) {
051                        id = id.withResourceType("Subscription");
052                }
053
054                ActiveSubscription activeSubscription = mySubscriptionRegistry.get(id.getIdPart());
055
056                if (activeSubscription == null) {
057                        return WebsocketValidationResponse.INVALID_RESPONSE(
058                                        "Invalid bind request - Unknown subscription: " + id.getValue());
059                }
060
061                if (activeSubscription.getSubscription().getChannelType() != CanonicalSubscriptionChannelType.WEBSOCKET) {
062                        return WebsocketValidationResponse.INVALID_RESPONSE("Subscription " + id.getValue() + " is not a "
063                                        + CanonicalSubscriptionChannelType.WEBSOCKET + " subscription");
064                }
065
066                return WebsocketValidationResponse.VALID_RESPONSE(activeSubscription);
067        }
068}