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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) [2017-2021] Payara Foundation and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://github.com/payara/Payara/blob/master/LICENSE.txt
 * See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * The Payara Foundation designates this particular file as subject to the "Classpath"
 * exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
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package fish.payara.microprofile.jwtauth.jaxrs;

import java.lang.reflect.Method;

import jakarta.annotation.security.DenyAll;
import jakarta.annotation.security.PermitAll;
import jakarta.annotation.security.RolesAllowed;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.ws.rs.container.DynamicFeature;
import jakarta.ws.rs.container.ResourceInfo;
import jakarta.ws.rs.core.Context;
import jakarta.ws.rs.core.FeatureContext;
import jakarta.ws.rs.ext.Provider;

/**
 * This JAX-RS dynamic feature will install filters for JAX-RS resources
 * that check roles or deny all access.
 * 
 * @author Arjan Tijms
 */
@Provider
public class RolesAllowedDynamicFeature implements DynamicFeature {
    
    @Context
    private HttpServletRequest request;
    
    @Context
    private HttpServletResponse response;

    @Override
    public void configure(ResourceInfo resourceInfo, FeatureContext configuration) {
        Method resourceMethod = resourceInfo.getResourceMethod();

        // ## Method level access
        
        // Deny All (Excluded) resources cannot be accessed by anyone
        if (resourceMethod.isAnnotationPresent(DenyAll.class)) {
            configuration.register(new DenyAllRequestFilter());
            return;
        }
        
        // Permit All (Unchecked) resources are free to be accessed by everyone
        if (resourceMethod.isAnnotationPresent(PermitAll.class)) {
            // Still register the filter, as the principal should still be injected
            configuration.register(new RolesAllowedRequestFilter(request, response));
            return;
        }

        // Access is granted via role 
        RolesAllowed rolesAllowed = resourceMethod.getAnnotation(RolesAllowed.class);
        if (rolesAllowed != null) {
            configuration.register(new RolesAllowedRequestFilter(request, response, rolesAllowed.value()));
            return;
        }
        
        // ## Class level access

        rolesAllowed = resourceInfo.getResourceClass().getAnnotation(RolesAllowed.class);
        if (rolesAllowed != null) {
            configuration.register(new RolesAllowedRequestFilter(request, response, rolesAllowed.value()));
        }
    }
 
}