From af4fdad3bd82c926ef742aa419c18cb15595703d Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Sat, 4 Dec 2010 19:55:38 +0100
Subject: Added riichi handler.

---
 server/game.cpp   |  6 +++++-
 server/game.h     |  6 ++++++
 server/player.cpp | 40 ++++++++++++++++++++++------------------
 3 files changed, 33 insertions(+), 19 deletions(-)

diff --git a/server/game.cpp b/server/game.cpp
index 66a791c..c8950ce 100644
--- a/server/game.cpp
+++ b/server/game.cpp
@@ -195,7 +195,11 @@ void Game::handle_action_draw(Action action) {
 			round_end();
 		} break;
 		
-		case Action::Riichi:
+		case Action::Riichi: {
+			players[current_player].declare_riichi();
+			round_update_draw();
+		} break;
+		
 		case Action::Kan:
 		case Action::Draw:
 			// Not implemented yet.
diff --git a/server/game.h b/server/game.h
index c347a6b..f8d9ff4 100644
--- a/server/game.h
+++ b/server/game.h
@@ -34,6 +34,9 @@ class Game : public boost::enable_shared_from_this<Game> {
 				int score;
 				int wind;
 				
+				//! Indexes of tiles that will give tenpai (used after riichi declaration).
+				List<int> tenpai_indexes;
+				
 				//! Prepare for a new round.
 				void round_start(int w);
 				
@@ -84,6 +87,9 @@ class Game : public boost::enable_shared_from_this<Game> {
 				//! Claim last discard from pond.
 				Tile claim();
 				
+				//! Declare riichi.
+				void declare_riichi();
+				
 				//! Make chi from tile.
 				void make_chi(Tile tile, int target);
 				
diff --git a/server/player.cpp b/server/player.cpp
index 8397c48..7e890fb 100644
--- a/server/player.cpp
+++ b/server/player.cpp
@@ -7,6 +7,7 @@ void Game::Player::round_start(int w) {
 	hand.clear();
 	open.clear();
 	pond.clear();
+	tenpai_indexes.clear();
 	riichi = false;
 	score = 25000;
 	wind = w;
@@ -54,8 +55,15 @@ Actions Game::Player::get_actions_draw() {
 		}
 	
 	} else {
-		// Only tile that can be discarded is the last drawn one.
-		possible_actions.push_back(Action(Action::Discard, Action::Hand, hand.size() - 1));
+		if(tenpai_indexes) {
+			for(List<int>::iterator it = tenpai_indexes.begin(); it != tenpai_indexes.end(); it++) {
+				possible_actions.push_back(Action(Action::Discard, Action::Hand, *it));
+			}
+			tenpai_indexes.clear();
+		} else {
+			// Only tile that can be discarded is the last drawn one.
+			possible_actions.push_back(Action(Action::Discard, Action::Hand, hand.size() - 1));
+		}
 	}
 	
 	return possible_actions;
@@ -105,26 +113,18 @@ bool Game::Player::can_riichi() {
 		return false;
 	}
 	
-	Tiles tiles = hand;
-	
-	tiles.sort();
-	
-	// Take first tile out of the set.
-	Tile out = tiles.front();
-	tiles.erase(tiles.begin());
-	
-	// Iterate over the rest of the set, exchanging the tile until a tenpai is found or all is tested.
-	for(Tiles::iterator it = tiles.begin(); it != tiles.end(); it++) {
+	// Iterate over the hand, testing to remove each tile and see if it gives tenpai.
+	for(Tiles::iterator it = hand.begin(); it != hand.end(); it++) {
+		Tiles tiles = hand;
+		tiles.del(it - hand.begin());
+		tiles.sort();
+		
 		if(Hand::tenpai(tiles)) {
-			return true;
+			tenpai_indexes.push_back(it - hand.begin());
 		}
-		
-		// TODO: Skip unnecessary tests if player got several equal tiles on hand.
-		
-		std::swap(*it, out);
 	}
 	
-	return false;
+	return bool(tenpai_indexes);
 }
 
 Game::Player::Targets Game::Player::can_chi(Tile tile) {
@@ -225,6 +225,10 @@ Tile Game::Player::claim() {
 	return t;
 }
 
+void Game::Player::declare_riichi() {
+	riichi = true;
+}
+
 void Game::Player::make_chi(Tile tile, int target) {
 	Tiles chi;
 	
-- 
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