001/*
002 *
003 * Copyright 2016 Fernando Ramirez
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.jivesoftware.smackx.mam.provider;
018
019import java.io.IOException;
020import java.util.ArrayList;
021import java.util.List;
022
023import org.jivesoftware.smack.packet.IqData;
024import org.jivesoftware.smack.packet.XmlEnvironment;
025import org.jivesoftware.smack.provider.IqProvider;
026import org.jivesoftware.smack.xml.XmlPullParser;
027import org.jivesoftware.smack.xml.XmlPullParserException;
028
029import org.jivesoftware.smackx.mam.element.MamElementFactory;
030import org.jivesoftware.smackx.mam.element.MamPrefsIQ;
031import org.jivesoftware.smackx.mam.element.MamPrefsIQ.DefaultBehavior;
032
033import org.jxmpp.JxmppContext;
034import org.jxmpp.jid.Jid;
035import org.jxmpp.jid.impl.JidCreate;
036
037/**
038 * MAM Preferences IQ Provider class.
039 *
040 * @see <a href="http://xmpp.org/extensions/xep-0313.html">XEP-0313: Message
041 *      Archive Management</a>
042 * @author Fernando Ramirez
043 *
044 */
045public class MamPrefsIQProvider extends IqProvider<MamPrefsIQ> {
046
047    public static final MamPrefsIQProvider INSTANCE = new MamPrefsIQProvider();
048
049    @Override
050    public MamPrefsIQ parse(XmlPullParser parser, int initialDepth, IqData iqData, XmlEnvironment xmlEnvironment, JxmppContext jxmppContext) throws XmlPullParserException, IOException {
051        MamElementFactory elementFactory =  MamElementFactory.forParser(parser);
052        String defaultBehaviorString = parser.getAttributeValue("", "default");
053        DefaultBehavior defaultBehavior = null;
054        if (defaultBehaviorString != null) {
055            defaultBehavior = DefaultBehavior.valueOf(defaultBehaviorString);
056        }
057
058        List<Jid> alwaysJids = null;
059        List<Jid> neverJids = null;
060
061        outerloop: while (true) {
062            final XmlPullParser.Event eventType = parser.next();
063            switch (eventType) {
064            case START_ELEMENT:
065                final String name = parser.getName();
066                switch (name) {
067                case "always":
068                    alwaysJids = iterateJids(parser);
069                    break;
070                case "never":
071                    neverJids = iterateJids(parser);
072                    break;
073                }
074                break;
075            case END_ELEMENT:
076                if (parser.getDepth() == initialDepth) {
077                    break outerloop;
078                }
079                break;
080            default:
081                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
082                break;
083            }
084        }
085
086        return elementFactory.newPrefsIQ(alwaysJids, neverJids, defaultBehavior);
087    }
088
089    private static List<Jid> iterateJids(XmlPullParser parser) throws XmlPullParserException, IOException {
090        List<Jid> jids = new ArrayList<>();
091
092        int initialDepth = parser.getDepth();
093
094        outerloop: while (true) {
095            final XmlPullParser.Event eventType = parser.next();
096            switch (eventType) {
097            case START_ELEMENT:
098                final String name = parser.getName();
099                switch (name) {
100                case "jid":
101                    parser.next();
102                    jids.add(JidCreate.from(parser.getText()));
103                    break;
104                }
105                break;
106            case  END_ELEMENT:
107                if (parser.getDepth() == initialDepth) {
108                    break outerloop;
109                }
110                break;
111            default:
112                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
113                break;
114            }
115        }
116
117        return jids;
118    }
119
120}