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/*
 * Copyright 2017-2020 original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micronaut.security.ldap.context;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jakarta.inject.Singleton;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import javax.naming.directory.InitialDirContext;
import java.util.Collections;
import java.util.Map;
import java.util.Properties;

/**
 * Default implementation of {@link ContextBuilder}.
 *
 * @author James Kleeh
 * @since 1.0
 */
@Singleton
public class DefaultContextBuilder implements ContextBuilder {

    private static final Logger LOG = LoggerFactory.getLogger(DefaultContextBuilder.class);

    @Override
    public DirContext build(ContextSettings contextSettings) throws NamingException {
        return build(contextSettings.getFactory(),
                contextSettings.getUrl(),
                contextSettings.getDn(),
                contextSettings.getPassword(),
                contextSettings.getPooled(),
                contextSettings.getAdditionalProperties());
    }

    @Override
    public DirContext build(String factory, String server, String user, String password, boolean pooled) throws NamingException {
        return build(factory, server, user, password, pooled, Collections.emptyMap());
    }

    private DirContext build(String factory, String server, String user, String password, boolean pooled, Map additionalProperties) throws NamingException {
        Properties props = new Properties();
        props.put(Context.INITIAL_CONTEXT_FACTORY, factory);
        props.put(Context.PROVIDER_URL, server);
        props.put(Context.SECURITY_AUTHENTICATION, "simple");
        props.put(Context.SECURITY_PRINCIPAL, user);
        props.put(Context.SECURITY_CREDENTIALS, password);
        if (pooled) {
            props.put("com.sun.jndi.ldap.connect.pool", "true");
        }
        if (!additionalProperties.isEmpty()) {
            props.putAll(additionalProperties);
        }
        return new InitialDirContext(props);
    }

    @Override
    public void close(DirContext context) {
        if (context != null) {
            try {
                context.close();
            } catch (Throwable e) {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Exception occurred while closing an LDAP context", e);
                }
            }
        }
    }
}