init

matches/matches.tool.js

@@ -0,0 +1,71 @@
+const UserTool = require('../users/users.tool');
+const config = require('../config.js');
+
+
+var MatchTool = {};
+
+
+MatchTool.calculateELO = (player_elo, opponent_elo, progress, won, lost) =>
+{
+    var p_elo = player_elo || 1000;
+    var o_elo = opponent_elo || 1000;
+
+    var p_elo_log = Math.pow(10.0, p_elo / 400.0);
+    var o_elo_log = Math.pow(10.0,  o_elo / 400.0);
+    var p_expected = p_elo_log / (p_elo_log + o_elo_log);
+    var p_score = won ? 1.0 : (lost ? 0.0 : 0.5);
+    
+    progress = Math.min(Math.max(progress, 0.0), 1.0);
+    var elo_k = progress * config.elo_k + (1.0 - progress) * config.elo_ini_k;
+    var new_elo = Math.round(p_elo + elo_k * (p_score - p_expected));
+    return new_elo;
+}
+
+MatchTool.GetPlayerData = (player) => 
+{
+    var data = {};
+    data.username = player.username;
+    data.elo = player.elo;
+    data.reward = {};
+    return data;
+}
+
+MatchTool.GainMatchReward = async(player, opponent, winner_username) => {
+    
+    var player_elo = player.elo;
+    var opponent_elo = opponent.elo;
+    var won = winner_username == player.username;
+    var lost = winner_username == opponent.username;
+
+    //Rewards
+    var xp = won ? config.xp_victory : config.xp_defeat;
+    var coins = won ? config.coins_victory : config.coins_defeat;
+
+    player.xp += xp;
+    player.coins += coins;
+
+    //Match winrate
+    player.matches +=1;
+
+    if(won)
+        player.victories += 1;
+    else if (lost)
+        player.defeats += 1;
+    
+    //Calculate elo
+    var match_count = player.matches || 0;
+    var match_progress = Math.min(Math.max(match_count / config.elo_ini_match, 0.0), 1.0);
+    var new_elo = MatchTool.calculateELO(player_elo, opponent_elo, match_progress, won, lost);
+    player.elo = new_elo;
+    player.save();
+
+    var reward = {
+        elo: player.elo,
+        xp: xp,
+        coins: coins
+    }; 
+
+    return reward;
+};
+
+module.exports = MatchTool;