Add support for monitoring issues that are waiting for feedback

src/main/java/io/spring/issuebot/github/Event.java

@@ -0,0 +1,164 @@
+/*
+ * Copyright 2015 the original author or authors.
+ *
+ * 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 io.spring.issuebot.github;
+
+import java.time.OffsetDateTime;
+
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Getter;
+
+/**
+ * An event that has been performed on an {@link Issue}.
+ *
+ * @author Andy Wilkinson
+ */
+@Getter
+public class Event {
+
+	private final Type type;
+
+	private final OffsetDateTime creationTime;
+
+	private final Label label;
+
+	/**
+	 * Creates a new {@code Event}.
+	 *
+	 * @param type the type of the event
+	 * @param creationTime the timestamp of when the event was created
+	 * @param label the label associated with the event
+	 */
+	@JsonCreator
+	public Event(@JsonProperty("event") String type,
+			@JsonProperty("created_at") OffsetDateTime creationTime,
+			@JsonProperty("label") Label label) {
+		this.type = Type.valueFrom(type);
+		this.creationTime = creationTime;
+		this.label = label;
+	}
+
+	/**
+	 * The type of an {@link Event}.
+	 *
+	 * @author Andy Wilkinson
+	 */
+	public enum Type {
+
+		/**
+		 * The issue was closed by the actor.
+		 */
+		CLOSED("closed"),
+
+		/**
+		 * The issue was reopened by the actor.
+		 */
+		REOPENED("reopened"),
+
+		/**
+		 * The actor subscribed to receive notifications for an issue.
+		 */
+		SUBSCRIBED("subscribed"),
+
+		/**
+		 * The issue was merged by the actor.
+		 */
+		MERGED("merged"),
+
+		/**
+		 * The issue was referenced from a commit message.
+		 */
+		REFERENCED("referenced"),
+
+		/**
+		 * The actor was {@code @mentioned} in an issue body.
+		 */
+		MENTIONED("mentioned"),
+
+		/**
+		 * The issue was assigned to the actor.
+		 */
+		ASSIGNED("assigned"),
+
+		/**
+		 * The actor was unassigned from the issue.
+		 */
+		UNASSIGNED("unassigned"),
+
+		/**
+		 * A label was added to the issue.
+		 */
+		LABELED("labeled"),
+
+		/**
+		 * A label was removed from the issue.
+		 */
+		UNLABELED("unlabeled"),
+
+		/**
+		 * The issue was added to a milestone.
+		 */
+		MILESTONED("milestoned"),
+
+		/**
+		 * The issue was removed from a milestone.
+		 */
+		DEMILESTONED("demilestoned"),
+
+		/**
+		 * The issue title was changed.
+		 */
+		RENAMED("renamed"),
+
+		/**
+		 * The issue was locked by the actor.
+		 */
+		LOCKED("locked"),
+
+		/**
+		 * The issue was unlocked by the actor.
+		 */
+		UNLOCKED("unlocked"),
+
+		/**
+		 * The pull request's branch was deleted.
+		 */
+		HEAD_REF_DELETED("head_ref_deleted"),
+
+		/**
+		 * The pull request's branch was restored.
+		 */
+		HEAD_REF_RESTORED("head_ref_restored");
+
+		private String type;
+
+		Type(String type) {
+			this.type = type;
+		}
+
+		static Type valueFrom(String type) {
+			for (Type value : values()) {
+				if (type.equals(value.type)) {
+					return value;
+				}
+			}
+			throw new IllegalArgumentException(
+					"'" + type + "' is not a valid event type");
+		}
+	}
+
+}