001/*-
002 * #%L
003 * HAPI FHIR Subscription Server
004 * %%
005 * Copyright (C) 2014 - 2023 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 org.hl7.fhir.r4.model.IdType;
026import org.slf4j.Logger;
027import org.slf4j.LoggerFactory;
028import org.springframework.beans.factory.annotation.Autowired;
029
030import javax.annotation.Nonnull;
031
032public class WebsocketConnectionValidator {
033        private static Logger ourLog = LoggerFactory.getLogger(WebsocketConnectionValidator.class);
034
035        @Autowired
036        SubscriptionRegistry mySubscriptionRegistry;
037
038        /**
039         * Constructor
040         */
041        public WebsocketConnectionValidator() {
042                super();
043        }
044
045        public WebsocketValidationResponse validate(@Nonnull IdType id) {
046                if (!id.hasIdPart() || !id.isIdPartValid()) {
047                        return WebsocketValidationResponse.INVALID_RESPONSE(
048                                        "Invalid bind request - No ID included: " + id.getValue());
049                }
050
051                if (!id.hasResourceType()) {
052                        id = id.withResourceType("Subscription");
053                }
054
055                ActiveSubscription activeSubscription = mySubscriptionRegistry.get(id.getIdPart());
056
057                if (activeSubscription == null) {
058                        return WebsocketValidationResponse.INVALID_RESPONSE(
059                                        "Invalid bind request - Unknown subscription: " + id.getValue());
060                }
061
062                if (activeSubscription.getSubscription().getChannelType() != CanonicalSubscriptionChannelType.WEBSOCKET) {
063                        return WebsocketValidationResponse.INVALID_RESPONSE("Subscription " + id.getValue() + " is not a "
064                                        + CanonicalSubscriptionChannelType.WEBSOCKET + " subscription");
065                }
066
067                return WebsocketValidationResponse.VALID_RESPONSE(activeSubscription);
068        }
069}