001package ca.uhn.fhir.jpa.subscription.match.deliver.websocket;
002
003/*-
004 * #%L
005 * HAPI FHIR Subscription Server
006 * %%
007 * Copyright (C) 2014 - 2021 Smile CDR, Inc.
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 *
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 *
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import ca.uhn.fhir.jpa.subscription.model.CanonicalSubscriptionChannelType;
024import ca.uhn.fhir.jpa.subscription.match.registry.ActiveSubscription;
025import ca.uhn.fhir.jpa.subscription.match.registry.SubscriptionRegistry;
026import com.sun.istack.NotNull;
027import org.hl7.fhir.r4.model.IdType;
028import org.slf4j.Logger;
029import org.slf4j.LoggerFactory;
030import org.springframework.beans.factory.annotation.Autowired;
031
032public class WebsocketConnectionValidator {
033        private static Logger ourLog = LoggerFactory.getLogger(WebsocketConnectionValidator.class);
034
035        @Autowired
036        SubscriptionRegistry mySubscriptionRegistry;
037
038
039        /**
040         * Constructor
041         */
042        public WebsocketConnectionValidator() {
043                super();
044        }
045
046        public WebsocketValidationResponse validate(@NotNull IdType id) {
047                if (!id.hasIdPart() || !id.isIdPartValid()) {
048                        return WebsocketValidationResponse.INVALID_RESPONSE("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("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 " + CanonicalSubscriptionChannelType.WEBSOCKET + " subscription");
063                }
064
065                return WebsocketValidationResponse.VALID_RESPONSE(activeSubscription);
066        }
067}