Initial implementation of XMPP Publish/Subscribe

Change-Id: I9930056b83004fa7a085f72f63ba973f9ec2d95b
diff --git a/protocols/xmpp/pubsub/ctl/src/test/java/org/onosproject/xmpp/pubsub/ctl/XmppPubSubControllerTest.java b/protocols/xmpp/pubsub/ctl/src/test/java/org/onosproject/xmpp/pubsub/ctl/XmppPubSubControllerTest.java
new file mode 100644
index 0000000..28f799d
--- /dev/null
+++ b/protocols/xmpp/pubsub/ctl/src/test/java/org/onosproject/xmpp/pubsub/ctl/XmppPubSubControllerTest.java
@@ -0,0 +1,341 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.onosproject.xmpp.pubsub.ctl;
+
+import com.google.common.collect.Lists;
+import org.dom4j.Document;
+import org.dom4j.Element;
+import org.dom4j.Namespace;
+import org.dom4j.tree.DefaultElement;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.net.DeviceId;
+import org.onosproject.xmpp.core.XmppController;
+import org.onosproject.xmpp.core.XmppDevice;
+import org.onosproject.xmpp.core.XmppDeviceId;
+import org.onosproject.xmpp.core.XmppDeviceListener;
+import org.onosproject.xmpp.core.XmppIqListener;
+import org.onosproject.xmpp.core.XmppMessageListener;
+import org.onosproject.xmpp.core.XmppPresenceListener;
+import org.onosproject.xmpp.core.XmppSession;
+import org.onosproject.xmpp.pubsub.XmppPubSubConstants;
+import org.onosproject.xmpp.pubsub.XmppPublishEventsListener;
+import org.onosproject.xmpp.pubsub.XmppSubscribeEventsListener;
+import org.onosproject.xmpp.pubsub.model.XmppEventNotification;
+import org.onosproject.xmpp.pubsub.model.XmppPubSubError;
+import org.onosproject.xmpp.pubsub.model.XmppPublish;
+import org.onosproject.xmpp.pubsub.model.XmppRetract;
+import org.onosproject.xmpp.pubsub.model.XmppSubscribe;
+import org.onosproject.xmpp.pubsub.model.XmppUnsubscribe;
+import org.xmpp.packet.IQ;
+import org.xmpp.packet.Packet;
+import org.xmpp.packet.PacketError;
+
+import java.net.InetSocketAddress;
+import java.util.List;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.hamcrest.CoreMatchers.nullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.onosproject.xmpp.pubsub.XmppPubSubConstants.PubSubApplicationCondition.ITEM_NOT_FOUND;
+
+/**
+ * Test class for XmppPubSubController class.
+ */
+public class XmppPubSubControllerTest {
+
+    private String nodeAttribute = "test";
+    private String node = "node";
+    private String toJid = "xmpp@onosproject.org";
+    private String fromJid = "test@xmpp.org";
+    private String pubSub = "pubsub";
+    private String publish = "publish";
+    private String retract = "retract";
+    private String subscribe = "subscribe";
+    private String unsubscribe = "unsubscribe";
+    private String item = "item";
+    private String id = "id";
+    private String itemId = "id-000";
+    private String entry = "entry";
+    private String testNamespace = "jabber:test:item";
+
+
+    XmppPubSubControllerImpl pubSubController;
+    XmppControllerAdapter xmppControllerAdapter;
+    XmppDeviceAdapter testDevice;
+
+    TestXmppPublishEventsListener testXmppPublishEventsListener;
+    TestXmppSubscribeEventsListener testXmppSubscribeEventsListener;
+
+    static class TestXmppPublishEventsListener implements XmppPublishEventsListener {
+
+        final List<XmppPublish> handledPublishMsgs = Lists.newArrayList();
+        final List<XmppRetract> handledRetractMsgs = Lists.newArrayList();
+
+        @Override
+        public void handlePublish(XmppPublish publishEvent) {
+            handledPublishMsgs.add(publishEvent);
+        }
+
+        @Override
+        public void handleRetract(XmppRetract retractEvent) {
+            handledRetractMsgs.add(retractEvent);
+        }
+    }
+
+    static class TestXmppSubscribeEventsListener implements XmppSubscribeEventsListener {
+
+        final List<XmppSubscribe> handledSubscribeMsgs = Lists.newArrayList();
+        final List<XmppUnsubscribe> handledUnsubscribeMsgs = Lists.newArrayList();
+
+
+        @Override
+        public void handleSubscribe(XmppSubscribe subscribeEvent) {
+            handledSubscribeMsgs.add(subscribeEvent);
+        }
+
+        @Override
+        public void handleUnsubscribe(XmppUnsubscribe unsubscribeEvent) {
+            handledUnsubscribeMsgs.add(unsubscribeEvent);
+        }
+    }
+
+    @Before
+    public void setUp() {
+        testDevice = new XmppDeviceAdapter();
+        xmppControllerAdapter = new XmppControllerAdapter();
+        pubSubController = new XmppPubSubControllerImpl();
+        pubSubController.xmppController = xmppControllerAdapter;
+        testXmppPublishEventsListener = new TestXmppPublishEventsListener();
+        testXmppSubscribeEventsListener = new TestXmppSubscribeEventsListener();
+        pubSubController.activate();
+    }
+
+    @Test
+    public void testActivate() {
+        assertThat(xmppControllerAdapter.iqListener, is(notNullValue()));
+    }
+
+    @Test
+    public void testDeactivate() {
+        pubSubController.deactivate();
+        assertThat(xmppControllerAdapter.iqListener, is(nullValue()));
+    }
+
+    @Test
+    public void testAddRemoveListeners() {
+        pubSubController.addXmppPublishEventsListener(testXmppPublishEventsListener);
+        assertThat(pubSubController.xmppPublishEventsListeners.size(), is(1));
+        pubSubController.addXmppSubscribeEventsListener(testXmppSubscribeEventsListener);
+        assertThat(pubSubController.xmppSubscribeEventsListeners.size(), is(1));
+        pubSubController.removeXmppPublishEventsListener(testXmppPublishEventsListener);
+        assertThat(pubSubController.xmppPublishEventsListeners.size(), is(0));
+        pubSubController.removeXmppSubscribeEventsListener(testXmppSubscribeEventsListener);
+        assertThat(pubSubController.xmppSubscribeEventsListeners.size(), is(0));
+    }
+
+    @Test
+    public void testNotifyEvent() {
+        XmppEventNotification eventNotification = new XmppEventNotification(nodeAttribute,
+                                                                            new DefaultElement(nodeAttribute));
+        pubSubController.notify(DeviceId.NONE, eventNotification);
+        assertThat(testDevice.sentPackets.size(), is(1));
+        assertThat(testDevice.sentPackets.get(0), is(eventNotification));
+    }
+
+    @Test
+    public void testNotifyError() {
+        XmppPubSubError xmppPubSubError =
+                new XmppPubSubError(ITEM_NOT_FOUND);
+        pubSubController.notifyError(DeviceId.NONE, xmppPubSubError);
+        assertThat(testDevice.sentErrors.size(), is(1));
+    }
+
+    @Test
+    public void testHandlePubSubMessages() {
+        pubSubController.addXmppPublishEventsListener(testXmppPublishEventsListener);
+        pubSubController.addXmppSubscribeEventsListener(testXmppSubscribeEventsListener);
+        XmppSubscribe xmppSubscribe = buildXmppSubscribe();
+        xmppControllerAdapter.iqListener.handleIqStanza(xmppSubscribe);
+        assertThat(testXmppSubscribeEventsListener.handledSubscribeMsgs.size(), is(1));
+        XmppUnsubscribe xmppUnsubscribe = buildXmppUnsubscribe();
+        xmppControllerAdapter.iqListener.handleIqStanza(xmppUnsubscribe);
+        assertThat(testXmppSubscribeEventsListener.handledUnsubscribeMsgs.size(), is(1));
+        XmppPublish xmppPublish = buildXmppPublish();
+        xmppControllerAdapter.iqListener.handleIqStanza(xmppPublish);
+        assertThat(testXmppPublishEventsListener.handledPublishMsgs.size(), is(1));
+        XmppRetract xmppRetract = buildXmppRetract();
+        xmppControllerAdapter.iqListener.handleIqStanza(xmppRetract);
+        assertThat(testXmppPublishEventsListener.handledRetractMsgs.size(), is(1));
+    }
+
+    private XmppSubscribe buildXmppSubscribe() {
+        IQ iq = new IQ(IQ.Type.set);
+        iq.setTo(toJid);
+        iq.setFrom(fromJid);
+        Element element = new DefaultElement(pubSub, Namespace.get(XmppPubSubConstants.PUBSUB_NAMESPACE));
+        Element childElement = new DefaultElement(subscribe);
+        childElement.addAttribute(node, nodeAttribute);
+        element.add(childElement);
+        iq.setChildElement(element);
+        XmppSubscribe xmppSubscribe = new XmppSubscribe(iq);
+        return xmppSubscribe;
+    }
+
+    private XmppUnsubscribe buildXmppUnsubscribe() {
+        IQ iq = new IQ(IQ.Type.set);
+        iq.setTo(toJid);
+        iq.setFrom(fromJid);
+        Element element = new DefaultElement(pubSub, Namespace.get(XmppPubSubConstants.PUBSUB_NAMESPACE));
+        Element childElement = new DefaultElement(unsubscribe);
+        childElement.addAttribute(node, nodeAttribute);
+        element.add(childElement);
+        iq.setChildElement(element);
+        XmppUnsubscribe xmppUnsubscribe = new XmppUnsubscribe(iq);
+        return xmppUnsubscribe;
+    }
+
+    private XmppPublish buildXmppPublish() {
+        IQ iq = new IQ(IQ.Type.set);
+        iq.setTo(toJid);
+        iq.setFrom(fromJid);
+        Element element = new DefaultElement(pubSub, Namespace.get(XmppPubSubConstants.PUBSUB_NAMESPACE));
+        Element publishElement = new DefaultElement(publish).addAttribute(node, nodeAttribute);
+        Element itemElement = new DefaultElement(item).addAttribute(id, itemId);
+        Element entryElement = new DefaultElement(entry, Namespace.get(testNamespace));
+        itemElement.add(entryElement);
+        publishElement.add(itemElement);
+        element.add(publishElement);
+        iq.setChildElement(element);
+        XmppPublish xmppPublish = new XmppPublish(iq);
+        return xmppPublish;
+    }
+
+    private XmppRetract buildXmppRetract() {
+        IQ iq = new IQ(IQ.Type.set);
+        iq.setTo(toJid);
+        iq.setFrom(fromJid);
+        Element element = new DefaultElement(pubSub, Namespace.get(XmppPubSubConstants.PUBSUB_NAMESPACE));
+        Element retractElement = new DefaultElement(retract).addAttribute(node, nodeAttribute);
+        Element itemElement = new DefaultElement(item).addAttribute(id, itemId);
+        retractElement.add(itemElement);
+        element.add(retractElement);
+        iq.setChildElement(element);
+        XmppRetract xmppRetract = new XmppRetract(iq);
+        return xmppRetract;
+    }
+
+
+    private class XmppControllerAdapter implements XmppController {
+
+        XmppIqListener iqListener;
+
+        @Override
+        public XmppDevice getDevice(XmppDeviceId xmppDeviceId) {
+            return testDevice;
+        }
+
+        @Override
+        public void addXmppDeviceListener(XmppDeviceListener deviceListener) {
+
+        }
+
+        @Override
+        public void removeXmppDeviceListener(XmppDeviceListener deviceListener) {
+
+        }
+
+        @Override
+        public void addXmppIqListener(XmppIqListener iqListener, String namespace) {
+            this.iqListener = iqListener;
+        }
+
+        @Override
+        public void removeXmppIqListener(XmppIqListener iqListener, String namespace) {
+            this.iqListener = null;
+        }
+
+        @Override
+        public void addXmppMessageListener(XmppMessageListener messageListener) {
+
+        }
+
+        @Override
+        public void removeXmppMessageListener(XmppMessageListener messageListener) {
+
+        }
+
+        @Override
+        public void addXmppPresenceListener(XmppPresenceListener presenceListener) {
+
+        }
+
+        @Override
+        public void removeXmppPresenceListener(XmppPresenceListener presenceListener) {
+
+        }
+    }
+
+    private class XmppDeviceAdapter implements XmppDevice {
+
+        final List<Packet> sentPackets = Lists.newArrayList();
+        final List<PacketError> sentErrors = Lists.newArrayList();
+
+        @Override
+        public XmppSession getSession() {
+            return null;
+        }
+
+        @Override
+        public InetSocketAddress getIpAddress() {
+            return null;
+        }
+
+        @Override
+        public void registerConnectedDevice() {
+
+        }
+
+        @Override
+        public void disconnectDevice() {
+
+        }
+
+        @Override
+        public void sendPacket(Packet packet) {
+            sentPackets.add(packet);
+        }
+
+        @Override
+        public void writeRawXml(Document document) {
+
+        }
+
+        @Override
+        public void handlePacket(Packet packet) {
+
+        }
+
+        @Override
+        public void sendError(PacketError packetError) {
+            sentErrors.add(packetError);
+        }
+
+    }
+
+}