Matrix: add display name colors depending on user id

1 files changed, 15 insertions, 0 deletions

diff --git a/src/plugins/Matrix.cpp b/src/plugins/Matrix.cpp
index 529d42a..a28aedc 100644
--- a/src/plugins/Matrix.cpp
+++ b/src/plugins/Matrix.cpp
@@ -182,6 +182,7 @@ namespace QuickMedia {
                     body_item->thumbnail_url = user_info.avatar_url;
                 // TODO: Show image thumbnail inline instead of url to image
                 body_item->url = messages[i].url;
+                body_item->author_color = user_info.display_name_color;
                 result_items.push_back(std::move(body_item));
                 prev_user_id = messages[i].user_id;
             }
@@ -327,6 +328,19 @@ namespace QuickMedia {
         return PluginResult::OK;
     }
 
+    static sf::Color user_id_to_color(const std::string &user_id) {
+        uint32_t color = 2166136261;
+        for(unsigned char c : user_id) {
+            color = (color * 16777619) ^ c;
+        }
+        sf::Color result = (sf::Color)color;
+        result.r = 64 + std::max(0, (int)result.r - 64);
+        result.g = 64 + std::max(0, (int)result.g - 64);
+        result.b = 64 + std::max(0, (int)result.b - 64);
+        result.a = 255;
+        return result;
+    }
+
     void Matrix::events_add_user_info(const Json::Value &events_json, RoomData *room_data) {
         if(!events_json.isArray())
             return;
@@ -371,6 +385,7 @@ namespace QuickMedia {
             // TODO: What if the user hasn't selected an avatar?
             user_info.avatar_url = homeserver + "/_matrix/media/r0/thumbnail/" + user_info.avatar_url + "?width=32&height=32&method=crop";
             user_info.display_name = display_name_json.asString();
+            user_info.display_name_color = user_id_to_color(sender_json_str);
             room_data->user_info.push_back(std::move(user_info));
             room_data->user_info_by_user_id.insert(std::make_pair(sender_json_str, room_data->user_info.size() - 1));
         }