Added ChatRoom::isEmpty method

include/linphone/api/c-chat-room.h

@@ -169,6 +169,13 @@ LINPHONE_PUBLIC void linphone_chat_room_delete_history(LinphoneChatRoom *cr);
  */
 LINPHONE_PUBLIC int linphone_chat_room_get_history_size(LinphoneChatRoom *cr);
 
+/**
+ * Returns whether or not a #LinphoneChatRoom has at least one #LinphoneChatMessage or not.
+ * @param[in] cr The #LinphoneChatRoom object corresponding to the conversation
+ * @return true if there are no #LinphoneChatMessage, false otherwise.
+ */
+LINPHONE_PUBLIC bool_t linphone_chat_room_is_empty (LinphoneChatRoom *cr);
+
 /**
  * Gets nb_message most recent messages from cr chat room, sorted from oldest to most recent.
  * @param[in] cr The #LinphoneChatRoom object corresponding to the conversation for which messages should be retrieved

src/c-wrapper/api/c-chat-room.cpp

@@ -208,6 +208,10 @@ int linphone_chat_room_get_history_size (LinphoneChatRoom *cr) {
 	return L_GET_CPP_PTR_FROM_C_OBJECT(cr)->getChatMessageCount();
 }
 
+bool_t linphone_chat_room_is_empty (LinphoneChatRoom *cr) {
+	return (bool_t)L_GET_CPP_PTR_FROM_C_OBJECT(cr)->isEmpty();
+}
+
 void linphone_chat_room_delete_message (LinphoneChatRoom *cr, LinphoneChatMessage *msg) {
 	shared_ptr<LinphonePrivate::EventLog> event = LinphonePrivate::MainDb::getEventFromKey(
 		L_GET_PRIVATE_FROM_C_OBJECT(msg)->dbKey

src/chat/chat-room/abstract-chat-room.h

@@ -81,7 +81,7 @@ public:
 	virtual void deleteHistory () = 0;
 
 	virtual std::shared_ptr<ChatMessage> getLastChatMessageInHistory () const = 0;
-
+	virtual bool isEmpty () const = 0;
 	virtual int getChatMessageCount () const = 0;
 	virtual int getUnreadChatMessageCount () const = 0;
 

src/chat/chat-room/chat-room.cpp

@@ -464,6 +464,10 @@ shared_ptr<ChatMessage> ChatRoom::getLastChatMessageInHistory () const {
 	return getCore()->getPrivate()->mainDb->getLastChatMessage(getConferenceId());
 }
 
+bool ChatRoom::isEmpty () const {
+	return getCore()->getPrivate()->mainDb->getLastChatMessage(getConferenceId()) == nullptr;
+}
+
 int ChatRoom::getChatMessageCount () const {
 	return getCore()->getPrivate()->mainDb->getChatMessageCount(getConferenceId());
 }

src/chat/chat-room/chat-room.h

@@ -61,7 +61,7 @@ public:
 	void deleteHistory () override;
 
 	std::shared_ptr<ChatMessage> getLastChatMessageInHistory () const override;
-
+	bool isEmpty () const override;
 	int getChatMessageCount () const override;
 	int getUnreadChatMessageCount () const override;
 

src/chat/chat-room/proxy-chat-room.cpp

@@ -140,6 +140,11 @@ shared_ptr<ChatMessage> ProxyChatRoom::getLastChatMessageInHistory () const {
 	return d->chatRoom->getLastChatMessageInHistory();
 }
 
+bool ProxyChatRoom::isEmpty () const {
+	L_D();
+	return d->chatRoom->isEmpty();
+}
+
 int ProxyChatRoom::getChatMessageCount () const {
 	L_D();
 	return d->chatRoom->getChatMessageCount();

src/chat/chat-room/proxy-chat-room.h

@@ -56,7 +56,7 @@ public:
 	void deleteHistory () override;
 
 	std::shared_ptr<ChatMessage> getLastChatMessageInHistory () const override;
-
+	bool isEmpty () const override;
 	int getChatMessageCount () const override;
 	int getUnreadChatMessageCount () const override;