75 lines
2.5 KiB
Java
75 lines
2.5 KiB
Java
/**
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*
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* Copyright 2018 Miguel Hincapie.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.chat_markers.filter;
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import org.jivesoftware.smack.filter.StanzaExtensionFilter;
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import org.jivesoftware.smack.packet.Stanza;
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import org.jivesoftware.smack.packet.XmlElement;
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import org.jivesoftware.smackx.chatstates.ChatState;
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import org.jivesoftware.smackx.chatstates.ChatStateManager;
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/**
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* Chat Markers Manager class (XEP-0333).
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*
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* @author Miguel Hincapie
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* @see <a href="http://xmpp.org/extensions/xep-0333.html">XEP-0333: Chat
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* Markers</a>
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*/
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public final class EligibleForChatMarkerFilter extends StanzaExtensionFilter {
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public static final EligibleForChatMarkerFilter INSTANCE = new EligibleForChatMarkerFilter(ChatStateManager.NAMESPACE);
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private EligibleForChatMarkerFilter(String namespace) {
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super(namespace);
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}
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/**
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* From XEP-0333, Protocol Format: The Chat Marker MUST have an 'id' which is the 'id' of the
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* message being marked.<br>
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* In order to make Chat Markers works together with XEP-0085 as it said in
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* 8.5 Interaction with Chat States, only messages with <code>active</code> chat
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* state are accepted.
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*
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* @param message to be analyzed.
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* @return true if the message contains a stanza Id.
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* @see <a href="http://xmpp.org/extensions/xep-0333.html">XEP-0333: Chat Markers</a>
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*/
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@Override
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public boolean accept(Stanza message) {
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if (!message.hasStanzaIdSet()) {
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return false;
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}
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if (super.accept(message)) {
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XmlElement extension = message.getExtension(ChatStateManager.NAMESPACE);
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String chatStateElementName = extension.getElementName();
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ChatState state;
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try {
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state = ChatState.valueOf(chatStateElementName);
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return state == ChatState.active;
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}
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catch (Exception ex) {
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return false;
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}
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}
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return true;
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}
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}
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