db.d: add del_user_tickers() method

Author: mathiascode

src/db.d

@@ -1014,6 +1014,25 @@ final class Database
         return true;
     }
 
+    void del_user_tickers(RoomType type)(string username)
+    {
+        auto sql = text(
+            "DELETE FROM ", tickers_table,
+            " WHERE username = ? AND room IN (",
+            "  SELECT r.room FROM ", rooms_table, " r",
+            "  WHERE r.room = ", tickers_table, ".room"
+        );
+        auto parameters = [username];
+
+        if (type != RoomType.any) {
+            sql ~= " AND r.type = ?";
+            parameters ~= [text(cast(int) type)];
+        }
+        sql ~= ");";
+
+        query(sql, parameters);
+    }
+
     string del_oldest_ticker(string room_name)
     {
         enum sql = text(

src/server/server.d

@@ -444,14 +444,13 @@ final class Server
 
     void del_user_tickers(RoomType type)(string username)
     {
-        // Joined rooms
+        db.del_user_tickers!type(username);
+
+        // Send ticker removal messages in joined rooms
+        enum permanent = false;
         foreach (ref room ; rooms)
             if (type == RoomType.any || room.type == type)
-                room.del_ticker(username);
-
-        // Stored rooms
-        foreach (ref ticker ; db.user_tickers!type(username))
-            db.del_ticker(ticker.room_name, username);
+                room.del_ticker(username, permanent);
     }
 
     Room get_room(string room_name)