From caacc7a87f58f6729026cd56d384c6366493746b Mon Sep 17 00:00:00 2001
From: Sylvain Berfini <sylvain.berfini@belledonne-communications.com>
Date: Mon, 27 Nov 2017 10:55:29 +0100
Subject: [PATCH] Started ChatRoom getLastChatMessage

---
 include/linphone/api/c-chat-room.h | 7 +++++++
 src/c-wrapper/api/c-chat-room.cpp  | 4 ++++
 src/chat/chat-room/chat-room.cpp   | 4 ++++
 src/chat/chat-room/chat-room.h     | 2 ++
 src/db/main-db.cpp                 | 5 +++++
 src/db/main-db.h                   | 1 +
 6 files changed, 23 insertions(+)

diff --git a/include/linphone/api/c-chat-room.h b/include/linphone/api/c-chat-room.h
index d4e0d65b9..966f36896 100644
--- a/include/linphone/api/c-chat-room.h
+++ b/include/linphone/api/c-chat-room.h
@@ -202,6 +202,13 @@ LINPHONE_PUBLIC bctbx_list_t *linphone_chat_room_get_history_events (LinphoneCha
  */
 LINPHONE_PUBLIC bctbx_list_t *linphone_chat_room_get_history_range_events (LinphoneChatRoom *cr, int begin, int end);
 
+/**
+ * Gets the last chat message sent or received in this chat room
+ * @param[in] cr The #LinphoneChatRoom object corresponding to the conversation for which last message should be retrieved
+ * @return the latest #LinphoneChatMessage
+ */
+LINPHONE_PUBLIC LinphoneChatMessage *linphone_chat_room_get_last_message_in_history(LinphoneChatRoom *cr);
+
 LINPHONE_PUBLIC LinphoneChatMessage * linphone_chat_room_find_message(LinphoneChatRoom *cr, const char *message_id);
 
 /**
diff --git a/src/c-wrapper/api/c-chat-room.cpp b/src/c-wrapper/api/c-chat-room.cpp
index 76aca9c08..90ffa6a66 100644
--- a/src/c-wrapper/api/c-chat-room.cpp
+++ b/src/c-wrapper/api/c-chat-room.cpp
@@ -217,6 +217,10 @@ bctbx_list_t *linphone_chat_room_get_history_range_events (LinphoneChatRoom *cr,
 	);
 }
 
+LinphoneChatMessage *linphone_chat_room_get_last_message_in_history(LinphoneChatRoom *cr) {
+	return L_GET_C_BACK_PTR(L_GET_CPP_PTR_FROM_C_OBJECT(cr)->getLastMessageInHistory());
+}
+
 LinphoneChatMessage *linphone_chat_room_find_message (LinphoneChatRoom *cr, const char *message_id) {
 	return L_GET_C_BACK_PTR(L_GET_CPP_PTR_FROM_C_OBJECT(cr)->findMessage(message_id));
 }
diff --git a/src/chat/chat-room/chat-room.cpp b/src/chat/chat-room/chat-room.cpp
index 1cda16c65..3578537a6 100644
--- a/src/chat/chat-room/chat-room.cpp
+++ b/src/chat/chat-room/chat-room.cpp
@@ -447,6 +447,10 @@ list<shared_ptr<ChatMessage> > ChatRoom::getHistoryRange (int startm, int endm)
 	return list<shared_ptr<ChatMessage>>();
 }
 
+shared_ptr<ChatMessage> ChatRoom::getLastMessageInHistory() const {
+	return getCore()->getPrivate()->mainDb->getLastChatMessage(getChatRoomId());
+}
+
 int ChatRoom::getUnreadChatMessagesCount () {
 	return getCore()->getPrivate()->mainDb->getUnreadChatMessagesCount(getChatRoomId());
 }
diff --git a/src/chat/chat-room/chat-room.h b/src/chat/chat-room/chat-room.h
index b7e557353..4e6bc3d9a 100644
--- a/src/chat/chat-room/chat-room.h
+++ b/src/chat/chat-room/chat-room.h
@@ -58,6 +58,8 @@ public:
 
 	virtual CapabilitiesMask getCapabilities () const = 0;
 
+	std::shared_ptr<ChatMessage> getLastMessageInHistory() const;
+
 	// TODO: Remove useless functions.
 	void compose ();
 	std::shared_ptr<ChatMessage> createFileTransferMessage (const LinphoneContent *initialContent);
diff --git a/src/db/main-db.cpp b/src/db/main-db.cpp
index e6e22caaa..41969d42c 100644
--- a/src/db/main-db.cpp
+++ b/src/db/main-db.cpp
@@ -1389,6 +1389,11 @@ MainDb::MainDb (const shared_ptr<Core> &core) : AbstractDb(*new MainDbPrivate),
 		return list<shared_ptr<ChatMessage>>();
 	}
 
+	shared_ptr<ChatMessage> MainDb::getLastChatMessage(const ChatRoomId &chatRoomId) const {
+		// TODO.
+		return nullptr;
+	}
+
 	list<shared_ptr<EventLog>> MainDb::getHistory (const ChatRoomId &chatRoomId, int nLast, FilterMask mask) const {
 		return getHistoryRange(chatRoomId, 0, nLast - 1, mask);
 	}
diff --git a/src/db/main-db.h b/src/db/main-db.h
index 6c2975efa..28e09437e 100644
--- a/src/db/main-db.h
+++ b/src/db/main-db.h
@@ -77,6 +77,7 @@ public:
 	int getUnreadChatMessagesCount (const ChatRoomId &chatRoomId = ChatRoomId()) const;
 	void markChatMessagesAsRead (const ChatRoomId &chatRoomId = ChatRoomId()) const;
 	std::list<std::shared_ptr<ChatMessage>> getUnreadChatMessages (const ChatRoomId &chatRoomId = ChatRoomId()) const;
+	std::shared_ptr<ChatMessage> getLastChatMessage(const ChatRoomId &chatRoomId = ChatRoomId()) const;
 
 	// ---------------------------------------------------------------------------
 	// Conference events.