From cfef90021917df0052bb49e9e35298260e7ca38c Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 4 Oct 2020 22:38:33 +0200
Subject: Matrix: remove initial delay when entering room

---
 src/plugins/Matrix.cpp | 34 ++++++++++++++++++++++++----------
 1 file changed, 24 insertions(+), 10 deletions(-)

(limited to 'src/plugins/Matrix.cpp')

diff --git a/src/plugins/Matrix.cpp b/src/plugins/Matrix.cpp
index 34c47f1..ca3fc28 100644
--- a/src/plugins/Matrix.cpp
+++ b/src/plugins/Matrix.cpp
@@ -42,20 +42,30 @@ namespace QuickMedia {
         return user->read_marker_event_id;
     }
 
-    void RoomData::prepend_messages_reverse(std::vector<std::shared_ptr<Message>> new_messages) {
+    size_t RoomData::prepend_messages_reverse(std::vector<std::shared_ptr<Message>> new_messages) {
         std::lock_guard<std::mutex> lock(room_mutex);
-        for(auto &new_message : new_messages) {
-            message_by_event_id[new_message->event_id] = new_message;
+        size_t num_inserted = 0;
+        for(auto it = new_messages.begin(); it != new_messages.end(); ++it) {
+            if(message_by_event_id.find((*it)->event_id) == message_by_event_id.end()) {
+                message_by_event_id.insert(std::make_pair((*it)->event_id, *it));
+                messages.insert(messages.begin(), std::move(*it));
+                ++num_inserted;
+            }
         }
-        messages.insert(messages.begin(), new_messages.rbegin(), new_messages.rend());
+        return num_inserted;
     }
 
-    void RoomData::append_messages(std::vector<std::shared_ptr<Message>> new_messages) {
+    size_t RoomData::append_messages(std::vector<std::shared_ptr<Message>> new_messages) {
         std::lock_guard<std::mutex> lock(room_mutex);
-        for(auto &new_message : new_messages) {
-            message_by_event_id[new_message->event_id] = new_message;
+        size_t num_inserted = 0;
+        for(auto it = new_messages.begin(); it != new_messages.end(); ++it) {
+            if(message_by_event_id.find((*it)->event_id) == message_by_event_id.end()) {
+                message_by_event_id.insert(std::make_pair((*it)->event_id, *it));
+                messages.push_back(std::move(*it));
+                ++num_inserted;
+            }
         }
-        messages.insert(messages.end(), new_messages.begin(), new_messages.end());
+        return num_inserted;
     }
 
     std::shared_ptr<Message> RoomData::get_message_by_id(const std::string &id) {
@@ -225,6 +235,7 @@ namespace QuickMedia {
         }
 
         // TODO: Thread safe?
+        /*
         if(!room->initial_fetch_finished) {
             PluginResult result = get_previous_room_messages(room);
             if(result == PluginResult::OK) {
@@ -234,6 +245,7 @@ namespace QuickMedia {
                 return result;
             }
         }
+        */
 
         room->acquire_room_lock();
         room_messages_to_body_items(room->get_messages_thread_unsafe().data(), room->get_messages_thread_unsafe().size(), result_items);
@@ -249,6 +261,7 @@ namespace QuickMedia {
             return PluginResult::ERR;
         }
 
+        /*
         if(!room->initial_fetch_finished) {
             PluginResult result = get_previous_room_messages(room);
             if(result == PluginResult::OK) {
@@ -258,6 +271,7 @@ namespace QuickMedia {
                 return result;
             }
         }
+        */
 
         room->acquire_room_lock();
         size_t num_new_messages = room->get_messages_thread_unsafe().size() - room->last_read_index;
@@ -670,10 +684,10 @@ namespace QuickMedia {
 
         // TODO: Loop and std::move instead? doesn't insert create copies?
         if(message_dir == MessageDirection::BEFORE) {
-            room_data->prepend_messages_reverse(std::move(new_messages));
+            size_t num_inserted_messages = room_data->prepend_messages_reverse(std::move(new_messages));
             // TODO: Is this thread-safe?
             if(room_data->last_read_index != 0)
-                room_data->last_read_index += new_messages.size();
+                room_data->last_read_index += num_inserted_messages;
         } else if(message_dir == MessageDirection::AFTER) {
             room_data->append_messages(std::move(new_messages));
         }
-- 
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