Introduce Checkable#GetLastComment()

lib/icinga/checkable-comment.cpp

@@ -7,6 +7,7 @@
 #include "base/timer.hpp"
 #include "base/utility.hpp"
 #include "base/logger.hpp"
+#include <utility>
 
 using namespace icinga;
 
@@ -42,6 +43,20 @@ std::set<Comment::Ptr> Checkable::GetComments() const
 	return m_Comments;
 }
 
+Comment::Ptr Checkable::GetLastComment() const
+{
+	std::unique_lock<std::mutex> lock (m_CommentMutex);
+	Comment::Ptr lastComment;
+
+	for (auto& comment : m_Comments) {
+		if (!lastComment || comment->GetEntryTime() > lastComment->GetEntryTime()) {
+			lastComment = comment;
+		}
+	}
+
+	return std::move(lastComment);
+}
+
 void Checkable::RegisterComment(const Comment::Ptr& comment)
 {
 	std::unique_lock<std::mutex> lock(m_CommentMutex);

lib/icinga/checkable.hpp

@@ -152,6 +152,7 @@ public:
 	void RemoveCommentsByType(int type, const String& removedBy = String());
 
 	std::set<Comment::Ptr> GetComments() const;
+	Comment::Ptr GetLastComment() const;
 	void RegisterComment(const Comment::Ptr& comment);
 	void UnregisterComment(const Comment::Ptr& comment);