[VOL-4707] Expose programmed subscribers via REST and move classes and interfaces to the API.

Change-Id: Ibfb9caa48455fd349932297cb9191ee0f0341ffa
Signed-off-by: Gustavo Silva <gsilva@furukawalatam.com>
diff --git a/api/src/main/java/org/opencord/olt/DiscoveredSubscriber.java b/api/src/main/java/org/opencord/olt/DiscoveredSubscriber.java
new file mode 100644
index 0000000..8d837f4
--- /dev/null
+++ b/api/src/main/java/org/opencord/olt/DiscoveredSubscriber.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2021-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.opencord.olt;
+
+import org.onosproject.net.AnnotationKeys;
+import org.onosproject.net.Device;
+import org.onosproject.net.Port;
+import org.opencord.sadis.SubscriberAndDeviceInformation;
+
+import java.util.Objects;
+
+/**
+ * Contains a subscriber's information and status for a specific device and port.
+ */
+public class DiscoveredSubscriber {
+
+    /**
+     * Describe whether the subscriber needs to be added or removed.
+     */
+    public enum Status {
+        ADDED,
+        REMOVED,
+        // Used for the remove subscriber calls from REST/CLI
+        ADMIN_REMOVED,
+    }
+
+    public Port port;
+    public Device device;
+    public Enum<Status> status;
+    public boolean hasSubscriber;
+    public SubscriberAndDeviceInformation subscriberAndDeviceInformation;
+
+    /**
+     * Creates the class with the proper information.
+     *
+     * @param device        the device of the subscriber
+     * @param port          the port
+     * @param status        the status for this specific subscriber
+     * @param hasSubscriber is the subscriber present
+     * @param si            the information about the tags/dhcp and other info.
+     */
+    public DiscoveredSubscriber(Device device, Port port, Status status, boolean hasSubscriber,
+                                SubscriberAndDeviceInformation si) {
+        this.device = device;
+        this.port = port;
+        this.status = status;
+        this.hasSubscriber = hasSubscriber;
+        subscriberAndDeviceInformation = si;
+    }
+
+    /**
+     * Returns the port name for the subscriber.
+     *
+     * @return the port name.
+     */
+    public String portName() {
+        return getPortName(port);
+    }
+
+    @Override
+    public String toString() {
+
+        return String.format("%s (status: %s, provisionSubscriber: %s)",
+                portWithName(this.port),
+                this.status, this.hasSubscriber
+        );
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        DiscoveredSubscriber that = (DiscoveredSubscriber) o;
+        return hasSubscriber == that.hasSubscriber &&
+                port.equals(that.port) &&
+                device.equals(that.device) &&
+                status.equals(that.status);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(port, device, status, hasSubscriber, subscriberAndDeviceInformation);
+    }
+
+    private String portWithName(Port port) {
+        return port.element().id().toString() + '/' +
+                port.number() + '[' +
+                getPortName(port) + ']';
+    }
+    private String getPortName(Port port) {
+        String name = port.annotations().value(AnnotationKeys.PORT_NAME);
+        return name == null ? "" : name;
+    }
+}