/**
 *
 * Copyright © 2003-2007 Jive Software, 2014-2015 Florian Schmaus
 *
 * 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.smack.roster.provider;

import java.io.IOException;

import org.jivesoftware.smack.SmackException;
import org.jivesoftware.smack.provider.IQProvider;
import org.jivesoftware.smack.roster.packet.RosterPacket;
import org.jivesoftware.smack.util.ParserUtils;
import org.jxmpp.jid.BareJid;
import org.jxmpp.jid.impl.JidCreate;
import org.jxmpp.util.XmppStringUtils;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

public class RosterPacketProvider extends IQProvider<RosterPacket> {

    public static final RosterPacketProvider INSTANCE = new RosterPacketProvider();

    @Override
    public RosterPacket parse(XmlPullParser parser, int initialDepth) throws XmlPullParserException, IOException,
                    SmackException {
        RosterPacket roster = new RosterPacket();
        RosterPacket.Item item = null;

        String version = parser.getAttributeValue("", "ver");
        roster.setVersion(version);

        outerloop: while (true) {
            int eventType = parser.next();
            switch(eventType) {
            case XmlPullParser.START_TAG:
                String startTag = parser.getName();
                switch (startTag) {
                case "item":
                    String jidString = parser.getAttributeValue("", "jid");
                    String name = parser.getAttributeValue("", "name");

                    // workaround for bug in jxmpp 0.5.0-alpha5, where
                    // JidCreate.bareFrom(String), which we would want to use
                    // here, does not produce correct results
                    String localpart = XmppStringUtils.parseLocalpart(jidString);
                    BareJid jid;
                    if (localpart.length() != 0) {
                        jid = JidCreate.entityBareFrom(jidString);
                    } else {
                        jid = JidCreate.domainBareFrom(jidString);
                    }

                    // Create packet.
                    item = new RosterPacket.Item(jid, name);
                    // Set status.
                    String ask = parser.getAttributeValue("", "ask");
                    RosterPacket.ItemStatus status = RosterPacket.ItemStatus.fromString(ask);
                    item.setItemStatus(status);
                    // Set type.
                    String subscription = parser.getAttributeValue("", "subscription");
                    RosterPacket.ItemType type = RosterPacket.ItemType.valueOf(subscription != null ? subscription : "none");
                    item.setItemType(type);
                    // Set approval status.
                    boolean approved = ParserUtils.getBooleanAttribute(parser, "approved", false);
                    item.setApproved(approved);
                    break;
                case "group":
                    // TODO item!= null
                    final String groupName = parser.nextText();
                    if (groupName != null && groupName.trim().length() > 0) {
                        item.addGroupName(groupName);
                    }
                    break;
                }
                break;
            case XmlPullParser.END_TAG:
                String endTag = parser.getName();
                switch(endTag) {
                case "item":
                    roster.addRosterItem(item);
                    break;
                case "query":
                    break outerloop;
                }
            }
        }
        return roster;
    }

}