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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
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 *
 * 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://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 */

package org.glassfish.admin.rest.cli;

import com.sun.enterprise.config.serverbeans.AuthRealm;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.Configs;
import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.security.auth.realm.BadRealmException;
import com.sun.enterprise.security.auth.realm.NoSuchRealmException;
import com.sun.enterprise.security.auth.realm.Realm;
import com.sun.enterprise.security.auth.realm.RealmsManager;
import com.sun.enterprise.util.LocalStringManagerImpl;
import com.sun.enterprise.util.SystemPropertyConstants;
import java.util.List;
import java.util.Properties;
import org.glassfish.api.ActionReport;
import org.glassfish.api.ActionReport.ExitCode;
import org.glassfish.api.Param;
import org.glassfish.api.admin.AdminCommand;
import org.glassfish.api.admin.AdminCommandContext;
import org.glassfish.api.admin.CommandLock;
import org.glassfish.api.admin.ExecuteOn;
import org.glassfish.api.admin.RestEndpoint;
import org.glassfish.api.admin.RestEndpoints;
import org.glassfish.api.admin.RestParam;
import org.glassfish.api.admin.RuntimeType;
import org.glassfish.api.admin.ServerEnvironment;
import org.glassfish.config.support.CommandTarget;
import org.glassfish.config.support.TargetType;

import org.jvnet.hk2.annotations.Service;
import org.glassfish.hk2.api.PerLookup;
import org.jvnet.hk2.config.types.Property;

import javax.inject.Inject;
import javax.inject.Named;

/**
 * returns the list of targets
 *
 * @author ludovic Champenois
 */
@Service(name = "__supports-user-management")
@PerLookup
@CommandLock(CommandLock.LockType.NONE)
@ExecuteOn({RuntimeType.DAS})
@TargetType({CommandTarget.DAS,CommandTarget.STANDALONE_INSTANCE,
    CommandTarget.CLUSTER, CommandTarget.CONFIG,CommandTarget.CLUSTERED_INSTANCE})
@RestEndpoints({
    @RestEndpoint(configBean=AuthRealm.class,
        opType=RestEndpoint.OpType.GET, 
        path="supports-user-management", 
        description="Check Support",
        params={
            @RestParam(name="realmName", value="$parent")
        })
})
public class SupportsUserManagementCommand implements AdminCommand {

    @Inject
    com.sun.enterprise.config.serverbeans.Domain domain;

    //TODO: for consistency with other commands dealing with realms
    //uncomment this below.
    //@Param(name="authrealmname")
    @Param
    String realmName;


    @Param(name = "target", primary=true, optional = true, defaultValue =
    SystemPropertyConstants.DEFAULT_SERVER_INSTANCE_NAME)
    private String target;

    @Inject
    @Named(ServerEnvironment.DEFAULT_INSTANCE_NAME)
    private Config config;

    @Inject
    private Configs configs;

    @Inject
    RealmsManager realmsManager;

    private static final LocalStringManagerImpl _localStrings =
	new LocalStringManagerImpl(SupportsUserManagementCommand.class);

    @Override
    public void execute(AdminCommandContext context) {
        Config tmp = null;
        try {
            tmp = configs.getConfigByName(target);
        } catch (Exception ex) {
        }

        if (tmp != null) {
            config = tmp;
        }
        if (tmp == null) {
            Server targetServer = domain.getServerNamed(target);
            if (targetServer != null) {
                config = domain.getConfigNamed(targetServer.getConfigRef());
            }
            com.sun.enterprise.config.serverbeans.Cluster cluster = domain.getClusterNamed(target);
            if (cluster != null) {
                config = domain.getConfigNamed(cluster.getConfigRef());
            }
        }
        ActionReport report = context.getActionReport();
        report.setActionExitCode(ExitCode.SUCCESS);
        try {
            report.setMessage("" + supportsUserManagement(realmName));
        } catch (BadRealmException ex) {
            //throw new RuntimeException(ex);
            report.setFailureCause(ex);
            report.setActionExitCode(ExitCode.FAILURE);
        } catch (NoSuchRealmException ex) {
            //throw new RuntimeException(ex);
            report.setFailureCause(ex);
            report.setActionExitCode(ExitCode.FAILURE);
        } catch (Exception ex) {
            report.setFailureCause(ex);
            report.setActionExitCode(ExitCode.FAILURE);
        }

    }

    private boolean supportsUserManagement(String realmName)
            throws BadRealmException, NoSuchRealmException {
        Realm r = realmsManager.getFromLoadedRealms(config.getName(), realmName);
        if (r != null) {
            return r.supportsUserManagement();
        }
        List authRealmConfigs = config.getSecurityService().getAuthRealm();
        for (AuthRealm authRealm : authRealmConfigs) {
            if (realmName.equals(authRealm.getName())) {
                List propConfigs = authRealm.getProperty();
                Properties props = new Properties();
                for (Property p : propConfigs) {
                    String value = p.getValue();
                    props.setProperty(p.getName(), value);
                }
                r = Realm.instantiate(authRealm.getName(), authRealm.getClassname(), props, config.getName());
                return r.supportsUserManagement();
            }
        }
        throw new NoSuchRealmException(
                _localStrings.getLocalString("NO_SUCH_REALM", "No Such Realm: {0}",
                new Object[] {realmName}));
    }
    
}