/**
 *
 * Copyright 2016 Fernando Ramirez
 *
 * 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
 *
 *     http://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 org.jivesoftware.smackx.blocking.provider;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.jivesoftware.smack.packet.IqData;
import org.jivesoftware.smack.packet.XmlEnvironment;
import org.jivesoftware.smack.provider.IqProvider;
import org.jivesoftware.smack.xml.XmlPullParser;
import org.jivesoftware.smack.xml.XmlPullParserException;

import org.jivesoftware.smackx.blocking.element.UnblockContactsIQ;

import org.jxmpp.jid.Jid;
import org.jxmpp.jid.impl.JidCreate;

/**
 * Unblock contact IQ provider class.
 *
 * @author Fernando Ramirez
 * @see <a href="http://xmpp.org/extensions/xep-0191.html">XEP-0191: Blocking
 *      Command</a>
 */
public class UnblockContactsIQProvider extends IqProvider<UnblockContactsIQ> {

    @Override
    public UnblockContactsIQ parse(XmlPullParser parser, int initialDepth, IqData iqData, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException {
        List<Jid> jids = null;

        outerloop: while (true) {
            XmlPullParser.Event eventType = parser.next();
            switch (eventType) {
            case START_ELEMENT:
                if (parser.getName().equals("item")) {
                    if (jids == null) {
                        jids = new ArrayList<>();
                    }
                    jids.add(JidCreate.from(parser.getAttributeValue("", "jid")));
                }
                break;

            case END_ELEMENT:
                if (parser.getDepth() == initialDepth) {
                    break outerloop;
                }
                break;

            default:
                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
                break;
            }
        }

        return new UnblockContactsIQ(jids);
    }

}