Merge pull request 'Some more changes for the new game handling api and also rate limiting' (#13) from game-handler into master

Reviewed-on: #13

api/handler/handler.go

@@ -0,0 +1,142 @@
+package handler
+
+import (
+	"mchess_server/api"
+	"mchess_server/chess"
+	"mchess_server/lobbies"
+	"mchess_server/utils"
+	"net/http"
+	"sync"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"go.uber.org/ratelimit"
+)
+
+var mut sync.Mutex
+var limiter = ratelimit.New(10)
+
+func HostGameHandler(c *gin.Context) {
+	limiter.Take()
+
+	player := chess.NewPlayer(uuid.New())
+	u := lobbies.GetUsher()
+
+	mut.Lock()
+	defer mut.Unlock()
+	lobby := u.CreateNewPrivateLobby(player)
+	u.AddPlayerToLobbyAndStartGameIfFull(player, lobby)
+
+	passphrase := lobby.Passphrase.String()
+	info := api.PlayerInfo{
+		PlayerID:   &player.Uuid,
+		LobbyID:    &lobby.Uuid,
+		Passphrase: &passphrase,
+	}
+	c.Header("Access-Control-Allow-Origin", "*")
+	c.IndentedJSON(http.StatusOK, info)
+}
+
+func GetLobbyForPassphraseHandler(c *gin.Context) {
+	limiter.Take()
+
+	reqPassphrase := c.Param("phrase")
+	if reqPassphrase == "" {
+		c.IndentedJSON(http.StatusBadRequest, reqPassphrase)
+		return
+	}
+
+	passPhraseWithSpaces := utils.ConvertToPassphraseWithSpaces(reqPassphrase)
+	lobby := lobbies.GetLobbyRegistry().GetLobbyByPassphrase(passPhraseWithSpaces)
+
+	if lobby == nil {
+		c.IndentedJSON(http.StatusNotFound, reqPassphrase)
+		return
+	}
+
+	lobbyInfo := api.LobbyInfo{
+		ID: &lobby.Uuid,
+	}
+
+	c.IndentedJSON(http.StatusOK, lobbyInfo)
+}
+
+// TODO: this will be replaced by the JoinGameHandler()
+func JoinPrivateGame(c *gin.Context) {
+	limiter.Take()
+
+	req := api.PlayerInfo{}
+	err := c.ShouldBindJSON(&req)
+	if err != nil || req.Passphrase == nil || *req.Passphrase == "" {
+		c.IndentedJSON(http.StatusNotFound, req)
+	}
+
+	u := lobbies.GetUsher()
+
+	if req.Passphrase != nil &&
+		*req.Passphrase != "" &&
+		req.PlayerID != nil &&
+		req.LobbyID != nil { //is reconnect
+		lobby := u.FindExistingPrivateLobby(utils.Passphrase(*req.Passphrase))
+		_, found := lobby.GetPlayerByUUID(*req.PlayerID)
+		if found {
+			c.IndentedJSON(
+				http.StatusOK,
+				api.PlayerInfo{
+					PlayerID:   req.PlayerID,
+					LobbyID:    req.LobbyID,
+					Passphrase: req.Passphrase,
+				})
+			return
+		} else {
+			c.IndentedJSON(http.StatusNotFound, req)
+		}
+	}
+
+	player := chess.NewPlayer(uuid.New())
+
+	mut.Lock()
+	defer mut.Unlock()
+	lobby := u.FindExistingPrivateLobby(utils.Passphrase(*req.Passphrase))
+	if lobby != nil {
+		u.AddPlayerToLobbyAndStartGameIfFull(player, lobby)
+	} else {
+		c.IndentedJSON(http.StatusNotFound, req)
+		return
+	}
+
+	info := api.PlayerInfo{
+		PlayerID:   &player.Uuid,
+		LobbyID:    &lobby.Uuid,
+		Passphrase: req.Passphrase,
+	}
+	c.Header("Access-Control-Allow-Origin", "*")
+	c.IndentedJSON(http.StatusOK, info)
+}
+
+func JoinGameHandler(c *gin.Context) {
+	limiter.Take()
+
+	id := c.Param("id")
+	idAsUUID, err := uuid.Parse(id)
+	if err != nil {
+		c.IndentedJSON(http.StatusBadRequest, nil)
+		return
+	}
+
+	passphrase := api.Passphrase{}
+	c.ShouldBindJSON(&passphrase)
+
+	u := lobbies.GetUsher()
+	lobby := u.GetLobbyByID(idAsUUID)
+	if lobby == nil {
+		c.IndentedJSON(http.StatusNotFound, nil)
+		return
+	}
+
+	lobbyInfo := api.LobbyInfo{
+		ID: &lobby.Uuid,
+	}
+
+	c.IndentedJSON(http.StatusOK, lobbyInfo)
+}

api/handler/handler_test.go

@@ -0,0 +1,57 @@
+package handler
+
+import (
+	"encoding/json"
+	"mchess_server/api"
+	"mchess_server/utils"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_GetLobbyFromPassphraseHandler(t *testing.T) {
+	var passphraseURLParameter string
+	var hostedLobbyId uuid.UUID
+
+	t.Run("host a lobby", func(t *testing.T) {
+		r1 := httptest.NewRecorder()
+		ctx1, e1 := gin.CreateTestContext(r1)
+		e1.GET("/api/hostPrivate", HostGameHandler)
+		hostGameRequest, _ := http.NewRequest("GET", "/api/hostPrivate", nil)
+		ctx1.Request = hostGameRequest
+
+		e1.ServeHTTP(r1, hostGameRequest)
+
+		playerInfo := api.PlayerInfo{}
+		err := json.Unmarshal(r1.Body.Bytes(), &playerInfo)
+		assert.NoError(t, err)
+
+		receivedPhrase := *playerInfo.Passphrase
+		hostedLobbyId = *playerInfo.LobbyID
+
+		passphrase := utils.NewPassphraseFromString(receivedPhrase)
+		passphraseURLParameter = passphrase.AsURLParam()
+	})
+
+	t.Run("see if the lobby can be fetched by using the passphrase", func(t *testing.T) {
+		r2 := httptest.NewRecorder()
+		ctx2, engine := gin.CreateTestContext(r2)
+		engine.GET("/api/getLobbyForPassphrase/:phrase", GetLobbyForPassphraseHandler)
+
+		url := "/api/getLobbyForPassphrase/" + passphraseURLParameter
+		getLobbyRequest, _ := http.NewRequest("GET", url, nil)
+		ctx2.Request = getLobbyRequest
+
+		engine.ServeHTTP(r2, getLobbyRequest)
+
+		lobbyInfo := api.LobbyInfo{}
+		err := json.Unmarshal(r2.Body.Bytes(), &lobbyInfo)
+		assert.NoError(t, err)
+
+		assert.Equal(t, hostedLobbyId, *lobbyInfo.ID)
+	})
+}

api/handler/websocket.go

@@ -0,0 +1,81 @@
+package handler
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"mchess_server/api"
+	"net/http"
+
+	"mchess_server/lobbies"
+
+	"github.com/gin-gonic/gin"
+	gorillaws "github.com/gorilla/websocket"
+)
+
+var upgrader = gorillaws.Upgrader{
+	CheckOrigin: func(r *http.Request) bool {
+		return true
+	},
+}
+
+func RegisterWebSocketConnection(c *gin.Context) {
+	limiter.Take()
+
+	log.Println(c.Request)
+	conn, err := upgrader.Upgrade(c.Writer, c.Request, nil)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	go waitForAndHandlePlayerID(c, conn)
+}
+
+func waitForAndHandlePlayerID(ctx context.Context, conn *gorillaws.Conn) {
+	limiter.Take()
+
+	msgType, msg, err := conn.ReadMessage()
+	if err != nil {
+		errorMessage := fmt.Sprintf("Reading from websocket connection did not work: %s", err)
+		log.Println(errorMessage)
+		conn.Close()
+		return
+	}
+
+	log.Println("read from websocket endpoint: ", msgType, string(msg), err)
+
+	var info api.PlayerInfo
+	err = json.Unmarshal(msg, &info)
+	if err != nil {
+		errorMessage := fmt.Sprintf("Unmarshaling message did not work: %s", err)
+		log.Println(errorMessage)
+		conn.WriteMessage(msgType, []byte(errorMessage))
+		conn.Close()
+		return
+	}
+
+	lobby := lobbies.GetLobbyRegistry().GetLobbyByUUID(*info.LobbyID)
+	if lobby == nil {
+		conn.WriteMessage(msgType, []byte("lobby not found"))
+		conn.Close()
+		return
+	}
+
+	player, found := lobby.GetPlayerByUUID(*info.PlayerID)
+	if !found {
+		conn.WriteMessage(msgType, []byte("player not found"))
+		conn.Close()
+		return
+	}
+	if player.Conn.HasWebsocketConnection() {
+		player.Conn.Close("closing existing connection")
+	}
+	lobby.Game.SetWebsocketConnectionFor(ctx, player, conn)
+	log.Println("player after setting connection: ", player)
+}
+
+func ConnectWsForGame(c *gin.Context) {
+	limiter.Take()
+
+}

api/lobby_info.go

@@ -0,0 +1,7 @@
+package api
+
+import "github.com/google/uuid"
+
+type LobbyInfo struct {
+	ID *uuid.UUID `json:"id,omitempty"`
+}

api/passphrase.go

@@ -0,0 +1,5 @@
+package api
+
+type Passphrase struct {
+	Value *string `json:"value,omitempty"`
+}

chess/board.go

@@ -80,9 +80,9 @@ func (b *Board) CheckAndPlay(move *types.Move) (bool, Violation) {
 		}
 	}
 
-	wasSpecialMove, err := tempBoard.handleSpecialMove(*move)
-	if err != nil {
-		return false, InvalidMove
+	wasSpecialMove, violation := tempBoard.handleSpecialMove(*move)
+	if violation != "" {
+		return false, violation
 	}
 
 	if !wasSpecialMove {
@@ -188,21 +188,21 @@ func (p Position) getCopyOfPosition() Position {
 	return position
 }
 
-func (b *Board) handleSpecialMove(move types.Move) (bool, error) {
+func (b *Board) handleSpecialMove(move types.Move) (bool, Violation) {
 	var was bool
-	var err error
+	var violation Violation
 	var pieceAtStartSquare = b.getPieceAt(move.StartSquare)
 
 	switch piece := pieceAtStartSquare.(type) {
 	case Pawn:
-		was, err = piece.HandlePossiblePromotion(b, move)
+		was, violation = piece.HandlePossiblePromotion(b, move)
 		if !was {
-			was, err = piece.HandleEnPassant(b, move, b.getLastMove())
+			was, violation = piece.HandleEnPassant(b, move, b.getLastMove())
 		}
 	case King:
-		was, err = piece.HandleCastling(b, move)
+		was, violation = piece.HandleCastling(b, move)
 	}
-	return was, err
+	return was, violation
 }
 
 type GameEndedReason string

chess/board_castling_test.go

@@ -0,0 +1,329 @@
+package chess
+
+import (
+	"mchess_server/types"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_Board_WhiteCastlesLeft(t *testing.T) {
+	board := newBoard()
+
+	board.position[types.Coordinate{Col: 5, Row: 1}] = King{Color: types.White}
+	board.position[types.Coordinate{Col: 1, Row: 1}] = Rook{Color: types.White}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 1},
+		EndSquare:   types.Coordinate{Col: 3, Row: 1},
+		ColorMoved:  types.White,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.True(t, valid)
+}
+
+func Test_Board_WhiteCastlesRight(t *testing.T) {
+	board := newBoard()
+
+	board.position[types.Coordinate{Col: 5, Row: 1}] = King{Color: types.White}
+	board.position[types.Coordinate{Col: 8, Row: 1}] = Rook{Color: types.White}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 1},
+		EndSquare:   types.Coordinate{Col: 7, Row: 1},
+		ColorMoved:  types.White,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.True(t, valid)
+}
+
+func Test_Board_BlackCastlesLeft(t *testing.T) {
+	board := newBoard()
+	board.colorToMove = types.Black
+
+	board.position[types.Coordinate{Col: 5, Row: 8}] = King{Color: types.Black}
+	board.position[types.Coordinate{Col: 1, Row: 8}] = Rook{Color: types.Black}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 8},
+		EndSquare:   types.Coordinate{Col: 3, Row: 8},
+		ColorMoved:  types.Black,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.True(t, valid)
+}
+
+func Test_Board_BlackCastlesRight(t *testing.T) {
+	board := newBoard()
+	board.colorToMove = types.Black
+
+	board.position[types.Coordinate{Col: 5, Row: 8}] = King{Color: types.Black}
+	board.position[types.Coordinate{Col: 8, Row: 8}] = Rook{Color: types.Black}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 8},
+		EndSquare:   types.Coordinate{Col: 7, Row: 8},
+		ColorMoved:  types.Black,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.True(t, valid)
+}
+
+func Test_Board_WhiteCastlesLeft_QueenCoversSquareInBetween(t *testing.T) {
+	board := newBoard()
+
+	board.position[types.Coordinate{Col: 5, Row: 1}] = King{Color: types.White}
+	board.position[types.Coordinate{Col: 1, Row: 1}] = Rook{Color: types.White}
+	board.position[types.Coordinate{Col: 4, Row: 5}] = Queen{Color: types.Black}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 1},
+		EndSquare:   types.Coordinate{Col: 3, Row: 1},
+		ColorMoved:  types.White,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_WhiteCastlesRight_QueenCoversSquareInBetween(t *testing.T) {
+	board := newBoard()
+
+	board.position[types.Coordinate{Col: 5, Row: 1}] = King{Color: types.White}
+	board.position[types.Coordinate{Col: 8, Row: 1}] = Rook{Color: types.White}
+	board.position[types.Coordinate{Col: 6, Row: 5}] = Queen{Color: types.Black}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 1},
+		EndSquare:   types.Coordinate{Col: 7, Row: 1},
+		ColorMoved:  types.White,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_WhiteCastlesLeft_KingInCheck(t *testing.T) {
+	board := newBoard()
+
+	board.position[types.Coordinate{Col: 5, Row: 1}] = King{Color: types.White}
+	board.position[types.Coordinate{Col: 1, Row: 1}] = Rook{Color: types.White}
+	board.position[types.Coordinate{Col: 5, Row: 5}] = Queen{Color: types.Black}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 1},
+		EndSquare:   types.Coordinate{Col: 3, Row: 1},
+		ColorMoved:  types.White,
+	}
+
+	valid, violation := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+	assert.Equal(t, CastlingWhileKingInCheck, violation)
+}
+
+func Test_Board_WhiteCastlesLeft_QueenCoversKingsSquare(t *testing.T) {
+	board := newBoard()
+
+	board.position[types.Coordinate{Col: 5, Row: 1}] = King{Color: types.White}
+	board.position[types.Coordinate{Col: 1, Row: 1}] = Rook{Color: types.White}
+	board.position[types.Coordinate{Col: 3, Row: 5}] = Queen{Color: types.Black}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 1},
+		EndSquare:   types.Coordinate{Col: 3, Row: 1},
+		ColorMoved:  types.White,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_BlackCastlesLeft_QueenCoversSquareInBetween(t *testing.T) {
+	board := newBoard()
+	board.colorToMove = types.Black
+
+	board.position[types.Coordinate{Col: 5, Row: 8}] = King{Color: types.Black}
+	board.position[types.Coordinate{Col: 1, Row: 8}] = Rook{Color: types.Black}
+	board.position[types.Coordinate{Col: 4, Row: 4}] = Queen{Color: types.White}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 8},
+		EndSquare:   types.Coordinate{Col: 3, Row: 8},
+		ColorMoved:  types.Black,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_BlackCastlesRight_QueenCoversSquareInBetween(t *testing.T) {
+	board := newBoard()
+	board.colorToMove = types.Black
+
+	board.position[types.Coordinate{Col: 5, Row: 8}] = King{Color: types.Black}
+	board.position[types.Coordinate{Col: 8, Row: 8}] = Rook{Color: types.Black}
+	board.position[types.Coordinate{Col: 6, Row: 4}] = Queen{Color: types.White}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 8},
+		EndSquare:   types.Coordinate{Col: 7, Row: 8},
+		ColorMoved:  types.Black,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_BlackCastlesLeft_KingInCheck(t *testing.T) {
+	board := newBoard()
+	board.colorToMove = types.Black
+
+	board.position[types.Coordinate{Col: 5, Row: 8}] = King{Color: types.Black}
+	board.position[types.Coordinate{Col: 1, Row: 8}] = Rook{Color: types.Black}
+	board.position[types.Coordinate{Col: 5, Row: 4}] = Queen{Color: types.White}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 8},
+		EndSquare:   types.Coordinate{Col: 3, Row: 8},
+		ColorMoved:  types.Black,
+	}
+
+	valid, violation := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+	assert.Equal(t, CastlingWhileKingInCheck, violation)
+}
+
+func Test_Board_BlackCastlesLeft_QueenCoversKingsSquare(t *testing.T) {
+	board := newBoard()
+	board.colorToMove = types.Black
+
+	board.position[types.Coordinate{Col: 5, Row: 8}] = King{Color: types.Black}
+	board.position[types.Coordinate{Col: 1, Row: 8}] = Rook{Color: types.Black}
+	board.position[types.Coordinate{Col: 3, Row: 4}] = Queen{Color: types.White}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 8},
+		EndSquare:   types.Coordinate{Col: 3, Row: 8},
+		ColorMoved:  types.Black,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_WhiteCastlesLeft_NoRook(t *testing.T) {
+	board := newBoard()
+
+	board.position[types.Coordinate{Col: 5, Row: 1}] = King{Color: types.White}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 1},
+		EndSquare:   types.Coordinate{Col: 3, Row: 1},
+		ColorMoved:  types.White,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_WhiteCastlesRight_NoRook(t *testing.T) {
+	board := newBoard()
+
+	board.position[types.Coordinate{Col: 5, Row: 1}] = King{Color: types.White}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 1},
+		EndSquare:   types.Coordinate{Col: 7, Row: 1},
+		ColorMoved:  types.White,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_BlackCastlesLeft_NoRook(t *testing.T) {
+	board := newBoard()
+	board.colorToMove = types.Black
+
+	kingSquare := types.Coordinate{Col: 5, Row: 8}
+	kingDestinationSquare := types.Coordinate{Col: 3, Row: 8}
+
+	board.position[kingSquare] = King{Color: types.Black}
+
+	castling := types.Move{
+		StartSquare: kingSquare,
+		EndSquare:   kingDestinationSquare,
+		ColorMoved:  types.Black,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+	assert.Equal(t, nil, board.getPieceAt(kingDestinationSquare))
+}
+
+func Test_Board_BlackCastlesRight_NoRook(t *testing.T) {
+	board := newBoard()
+	board.colorToMove = types.Black
+
+	board.position[types.Coordinate{Col: 5, Row: 8}] = King{Color: types.Black}
+
+	castling := types.Move{
+		StartSquare: types.Coordinate{Col: 5, Row: 8},
+		EndSquare:   types.Coordinate{Col: 7, Row: 8},
+		ColorMoved:  types.Black,
+	}
+
+	valid, _ := board.CheckAndPlay(&castling)
+
+	assert.False(t, valid)
+}
+
+func Test_Board_fixBugThatPreventsCastling(t *testing.T) {
+	board := newBoard()
+	board.Init()
+
+	//white move
+	valid, violation := board.CheckAndPlay(&types.Move{StartSquare: types.Coordinate{Col: 5, Row: 2}, EndSquare: types.Coordinate{Col: 5, Row: 3}})
+	assert.True(t, valid)
+	assert.Empty(t, violation)
+	//black move
+	valid, violation = board.CheckAndPlay(&types.Move{StartSquare: types.Coordinate{Col: 5, Row: 7}, EndSquare: types.Coordinate{Col: 5, Row: 6}})
+	assert.True(t, valid)
+	assert.Empty(t, violation)
+	//white move
+	valid, violation = board.CheckAndPlay(&types.Move{StartSquare: types.Coordinate{Col: 4, Row: 2}, EndSquare: types.Coordinate{Col: 4, Row: 3}})
+	assert.True(t, valid)
+	assert.Empty(t, violation)
+	//black move
+	valid, violation = board.CheckAndPlay(&types.Move{StartSquare: types.Coordinate{Col: 6, Row: 7}, EndSquare: types.Coordinate{Col: 6, Row: 6}})
+	assert.True(t, valid)
+	assert.Empty(t, violation)
+	//queen moves to check the king
+	valid, violation = board.CheckAndPlay(&types.Move{StartSquare: types.Coordinate{Col: 4, Row: 1}, EndSquare: types.Coordinate{Col: 8, Row: 5}})
+	assert.True(t, valid)
+	assert.Empty(t, violation)
+
+	//this moves should be valid but it was not because of a bug
+	valid, violation = board.CheckAndPlay(&types.Move{StartSquare: types.Coordinate{Col: 5, Row: 8}, EndSquare: types.Coordinate{Col: 5, Row: 7}})
+	assert.True(t, valid)
+	assert.Empty(t, violation)
+}

chess/game.go

@@ -8,8 +8,7 @@ import (
 	"mchess_server/types"
 
 	"github.com/google/uuid"
-	"github.com/samber/lo"
-	"nhooyr.io/websocket"
+	gorillaws "github.com/gorilla/websocket"
 )
 
 type Game struct {
@@ -210,13 +209,8 @@ func (game Game) broadcastGameEnd(reason GameEndedReason) error {
 }
 
 func (game *Game) playerDisconnected(p *Player) {
-	log.Println(string(p.color), " disconnected")
-	playerStillInGame := lo.Filter(game.players, func(player *Player, _ int) bool {
-		return player.color != p.color
-	})
-	game.players = playerStillInGame
 }
 
-func (game *Game) SetWebsocketConnectionFor(ctx context.Context, p *Player, ws *websocket.Conn) {
+func (game *Game) SetWebsocketConnectionFor(ctx context.Context, p *Player, ws *gorillaws.Conn) {
 	p.SetWebsocketConnectionAndSendBoardState(ctx, ws, game.board.PGN(), game.board.colorToMove)
 }

chess/king.go

@@ -29,25 +29,26 @@ func (k King) AfterMoveAction(board *Board, fromSquare types.Coordinate) {
 	}
 }
 
-func (k King) HandleCastling(board *Board, move types.Move) (bool, error) {
+func (k King) HandleCastling(board *Board, move types.Move) (bool, Violation) {
+	if !k.isMoveCastlingMove(board, move) {
+		return false, ""
+	}
+
 	if k.hadMovedBefore(board) {
-		return false, nil
+		return false, ""
 	}
 
-	valid, dir := k.movedOnValidCastlingSquare(board, move)
+	if board.isSquareAttacked(move.StartSquare, k.Color.Opposite()) {
+		return false, CastlingWhileKingInCheck
+	}
+
+	valid, dir := k.isCastlingAllowed(board, move)
 	if !valid {
-		return false, nil
-	}
-
-	switch k.Color {
-	case types.White:
-		board.state.WhiteKingMoved = true
-	case types.Black:
-		board.state.BlackKingMoved = true
+		return false, ""
 	}
 
 	k.playCastlingOnBoard(board, move, dir)
-	return true, nil
+	return true, ""
 }
 
 func (k King) hadMovedBefore(b *Board) bool {
@@ -64,52 +65,95 @@ func (k King) hadMovedBefore(b *Board) bool {
 type CastlingDirection string
 
 const (
+	NoDirection   CastlingDirection = ""
 	CastlingRight CastlingDirection = "right"
 	CastlingLeft  CastlingDirection = "left"
 )
 
-func (k King) movedOnValidCastlingSquare(b *Board, move types.Move) (bool, CastlingDirection) {
+func (k King) isMoveCastlingMove(b *Board, move types.Move) bool {
+	var destinationSquareForKingRight types.Coordinate
+	var destinationSquareForKingLeft types.Coordinate
+
+	switch k.Color {
+	case types.White:
+		destinationSquareForKingRight = types.Coordinate{Col: 7, Row: 1}
+		destinationSquareForKingLeft = types.Coordinate{Col: 3, Row: 1}
+
+	case types.Black:
+		destinationSquareForKingRight = types.Coordinate{Col: 7, Row: 8}
+		destinationSquareForKingLeft = types.Coordinate{Col: 3, Row: 8}
+	}
+
+	if move.EndSquare == destinationSquareForKingRight ||
+		move.EndSquare == destinationSquareForKingLeft {
+		return true
+	}
+
+	return false
+}
+
+func (k King) isCastlingAllowed(b *Board, move types.Move) (bool, CastlingDirection) {
 	var valid = false
 
 	switch k.Color {
 	case types.White:
-		castlingSquareRight := types.Coordinate{Col: 7, Row: 1}
-		castlingSquareLeft := types.Coordinate{Col: 3, Row: 1}
+		destinationSquareForKingRight := types.Coordinate{Col: 7, Row: 1}
+		destinationSquareForKingLeft := types.Coordinate{Col: 3, Row: 1}
 
-		if move.EndSquare == castlingSquareRight &&
-			b.getPieceAt(castlingSquareRight) == nil &&
-			b.getPieceAt(*castlingSquareRight.Left(1)) == nil &&
+		if move.EndSquare == destinationSquareForKingRight &&
+			b.getPieceAt(destinationSquareForKingRight) == nil &&
+			b.getPieceAt(*destinationSquareForKingRight.Left(1)) == nil &&
+			!b.isSquareAttacked(destinationSquareForKingRight, types.Black) &&
+			!b.isSquareAttacked(*destinationSquareForKingRight.Left(1), types.Black) &&
 			!b.state.WhiteHRookMoved {
-			return true, CastlingRight
+			_, ok := b.getPieceAt(types.Coordinate{Col: 8, Row: 1}).(Rook)
+			if ok {
+				return true, CastlingRight
+			}
 		}
 
-		if move.EndSquare == castlingSquareLeft &&
-			b.getPieceAt(castlingSquareLeft) == nil &&
-			b.getPieceAt(*castlingSquareLeft.Right(1)) == nil &&
-			b.getPieceAt(*castlingSquareLeft.Left(1)) == nil &&
+		if move.EndSquare == destinationSquareForKingLeft &&
+			b.getPieceAt(destinationSquareForKingLeft) == nil &&
+			b.getPieceAt(*destinationSquareForKingLeft.Right(1)) == nil &&
+			b.getPieceAt(*destinationSquareForKingLeft.Left(1)) == nil &&
+			!b.isSquareAttacked(destinationSquareForKingLeft, types.Black) &&
+			!b.isSquareAttacked(*destinationSquareForKingLeft.Right(1), types.Black) &&
 			!b.state.WhiteARookMoved {
-			return true, CastlingLeft
+			_, ok := b.getPieceAt(types.Coordinate{Col: 1, Row: 1}).(Rook)
+			if ok {
+				return true, CastlingLeft
+			}
 		}
 	case types.Black:
-		castlingSquareRight := types.Coordinate{Col: 7, Row: 8}
-		castlingSquareLeft := types.Coordinate{Col: 3, Row: 8}
+		destinationSquareForKingRight := types.Coordinate{Col: 7, Row: 8}
+		destinationSquareForKingLeft := types.Coordinate{Col: 3, Row: 8}
 
-		if move.EndSquare == castlingSquareRight &&
-			b.getPieceAt(castlingSquareRight) == nil &&
-			b.getPieceAt(*castlingSquareRight.Left(1)) == nil &&
+		if move.EndSquare == destinationSquareForKingRight &&
+			b.getPieceAt(destinationSquareForKingRight) == nil &&
+			b.getPieceAt(*destinationSquareForKingRight.Left(1)) == nil &&
+			!b.isSquareAttacked(destinationSquareForKingRight, types.White) &&
+			!b.isSquareAttacked(*destinationSquareForKingRight.Left(1), types.White) &&
 			!b.state.BlackHRookMoved {
-			return true, CastlingRight
+			_, ok := b.getPieceAt(types.Coordinate{Col: 8, Row: 8}).(Rook)
+			if ok {
+				return true, CastlingRight
+			}
 		}
 
-		if move.EndSquare == castlingSquareLeft &&
-			b.getPieceAt(castlingSquareLeft) == nil &&
-			b.getPieceAt(*castlingSquareLeft.Right(1)) == nil &&
-			b.getPieceAt(*castlingSquareLeft.Left(1)) == nil &&
+		if move.EndSquare == destinationSquareForKingLeft &&
+			b.getPieceAt(destinationSquareForKingLeft) == nil &&
+			b.getPieceAt(*destinationSquareForKingLeft.Right(1)) == nil &&
+			b.getPieceAt(*destinationSquareForKingLeft.Left(1)) == nil &&
+			!b.isSquareAttacked(destinationSquareForKingLeft, types.White) &&
+			!b.isSquareAttacked(*destinationSquareForKingLeft.Right(1), types.White) &&
 			!b.state.BlackARookMoved {
-			return true, CastlingLeft
+			_, ok := b.getPieceAt(types.Coordinate{Col: 1, Row: 8}).(Rook)
+			if ok {
+				return true, CastlingLeft
+			}
 		}
 	}
-	return valid, CastlingRight
+	return valid, NoDirection
 }
 
 func (k King) playCastlingOnBoard(board *Board, move types.Move, dir CastlingDirection) {

chess/pawn.go

@@ -32,7 +32,7 @@ func (p Pawn) GetColor() types.ChessColor {
 	return p.Color
 }
 
-func (p *Pawn) HandlePossiblePromotion(b *Board, move types.Move) (bool, error) {
+func (p *Pawn) HandlePossiblePromotion(b *Board, move types.Move) (bool, Violation) {
 	var isPromotionMove bool
 	var promotionToPiece types.PieceShortName
 
@@ -62,14 +62,14 @@ func (p *Pawn) HandlePossiblePromotion(b *Board, move types.Move) (bool, error)
 		b.position[move.EndSquare] = GetPieceForShortName(promotionToPiece)
 	}
 
-	return isPromotionMove, nil
+	return isPromotionMove, ""
 }
 
-func (p *Pawn) HandleEnPassant(b *Board, move, lastMove types.Move) (bool, error) {
+func (p *Pawn) HandleEnPassant(b *Board, move, lastMove types.Move) (bool, Violation) {
 	var wasEnPassant bool
 
 	if lastMove.PieceMoved.ToCommon() != types.PawnShortName {
-		return false, nil
+		return false, ""
 	}
 
 	switch move.ColorMoved {
@@ -127,7 +127,7 @@ func (p *Pawn) HandleEnPassant(b *Board, move, lastMove types.Move) (bool, error
 		b.position[move.EndSquare] = GetPieceForShortName(move.PieceMoved)
 	}
 
-	return wasEnPassant, nil
+	return wasEnPassant, ""
 }
 func (p Pawn) getAllMoves(fromSquare types.Coordinate) []types.Coordinate {
 	theoreticalMoves := make([]types.Coordinate, 0, 4)

chess/player.go

@@ -10,7 +10,7 @@ import (
 	"mchess_server/types"
 
 	"github.com/google/uuid"
-	"nhooyr.io/websocket"
+	gorillaws "github.com/gorilla/websocket"
 )
 
 type Player struct {
@@ -34,13 +34,13 @@ func (p Player) hasWebsocketConnection() bool {
 	return p.Conn.HasWebsocketConnection()
 }
 
-func (p *Player) SetWebsocketConnection(ctx context.Context, ws *websocket.Conn) {
+func (p *Player) SetWebsocketConnection(ctx context.Context, ws *gorillaws.Conn) {
 	p.Conn.SetWebsocketConnection(ws)
 }
 
 func (p *Player) SetWebsocketConnectionAndSendBoardState(
 	ctx context.Context,
-	ws *websocket.Conn,
+	ws *gorillaws.Conn,
 	boardPosition string,
 	turnColor types.ChessColor,
 ) {

chess/violation.go

@@ -3,12 +3,15 @@ package chess
 type Violation string
 
 var (
-	InvalidMove            Violation = "invalid move"
-	NoPieceAtStartSquare   Violation = "no piece at start square"
-	WrongColorMoved        Violation = "wrong color moved"
-	TargetSquareIsOccupied Violation = "target square is occupied"
-	KingInCheck            Violation = "king would be in check after move"
-	SomethingWentWrong     Violation = "something went wrong"
+	InvalidMove              Violation = "invalid move"
+	NoPieceAtStartSquare     Violation = "no piece at start square"
+	WrongColorMoved          Violation = "wrong color moved"
+	TargetSquareIsOccupied   Violation = "target square is occupied"
+	KingInCheck              Violation = "king would be in check after move"
+	SomethingWentWrong       Violation = "something went wrong"
+	CastlingThroughCheck     Violation = "king would move through check"
+	CastlingWhileKingInCheck Violation = "king cannot castle while in check"
+	CastlingKingMovedBefore  Violation = "king cannot caslte because he moved before"
 )
 
 func (v Violation) String() string {

connection/type.go

@@ -3,13 +3,15 @@ package connection
 import (
 	"context"
 	"log"
+	"sync"
 
-	"nhooyr.io/websocket"
+	gorillaws "github.com/gorilla/websocket"
 )
 
 type Connection struct {
-	ws                      *websocket.Conn
+	ws                      *gorillaws.Conn
 	wsConnectionEstablished chan bool
+	wsWriteLock             sync.Mutex
 	ctx                     context.Context
 	buffer                  MessageBuffer
 	disconnectCallback      func()
@@ -28,7 +30,7 @@ func NewConnection(options ...func(*Connection)) *Connection {
 	return &connection
 }
 
-func WithWebsocket(ws *websocket.Conn) func(*Connection) {
+func WithWebsocket(ws *gorillaws.Conn) func(*Connection) {
 	return func(c *Connection) {
 		c.ws = ws
 	}
@@ -56,7 +58,7 @@ func (conn *Connection) HasWebsocketConnection() bool {
 	return conn.ws != nil
 }
 
-func (conn *Connection) SetWebsocketConnection(ws *websocket.Conn) {
+func (conn *Connection) SetWebsocketConnection(ws *gorillaws.Conn) {
 	if ws == nil {
 		return
 	}
@@ -70,7 +72,7 @@ func (conn *Connection) SetWebsocketConnection(ws *websocket.Conn) {
 
 	go func() {
 		for {
-			_, msg, err := conn.ws.Read(conn.ctx)
+			_, msg, err := conn.ws.ReadMessage()
 			if err != nil {
 				log.Println("while reading from websocket: %w", err)
 				if conn.disconnectCallback != nil {
@@ -84,12 +86,15 @@ func (conn *Connection) SetWebsocketConnection(ws *websocket.Conn) {
 }
 
 func (conn *Connection) Write(msg []byte) error {
+	conn.wsWriteLock.Lock()
+	defer conn.wsWriteLock.Unlock()
+
 	if conn.ws == nil { //if ws is not yet set, we wait for it
 		<-conn.wsConnectionEstablished
 	}
 
 	log.Printf("Writing message: %s", string(msg))
-	return conn.ws.Write(conn.ctx, websocket.MessageText, msg)
+	return conn.ws.WriteMessage(gorillaws.TextMessage, msg)
 }
 
 func (conn *Connection) Read() ([]byte, error) {
@@ -103,6 +108,7 @@ func (conn *Connection) Read() ([]byte, error) {
 }
 
 func (conn *Connection) Close(msg string) {
-	conn.ws.Close(websocket.StatusCode(400), msg)
+	conn.ws.WriteMessage(gorillaws.TextMessage, []byte(msg))
+	conn.ws.Close()
 	conn.ws = nil
 }

go.mod

@@ -1,46 +1,46 @@
 module mchess_server
 
-go 1.21.1
+go 1.22
 
 require (
-	github.com/gin-gonic/gin v1.9.1
-	github.com/google/uuid v1.5.0
+	github.com/gin-gonic/gin v1.10.0
+	github.com/google/uuid v1.6.0
 	github.com/samber/lo v1.39.0
-	github.com/stretchr/testify v1.8.4
-	github.com/tjarratt/babble v0.0.0-20210505082055-cbca2a4833c1
-	nhooyr.io/websocket v1.8.10
+	github.com/stretchr/testify v1.9.0
 )
 
+require github.com/benbjohnson/clock v1.3.0 // indirect
+
 require (
-	github.com/bytedance/sonic v1.10.2 // indirect
-	github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d // indirect
-	github.com/chenzhuoyu/iasm v0.9.1 // indirect
+	github.com/bytedance/sonic v1.11.6 // indirect
+	github.com/bytedance/sonic/loader v0.1.1 // indirect
+	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cloudwego/iasm v0.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-playground/validator/v10 v10.16.0 // indirect
+	github.com/go-playground/validator/v10 v10.20.0 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
-	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/gorilla/websocket v1.5.1
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.6 // indirect
-	github.com/leodido/go-urn v1.2.4 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
-	github.com/onsi/ginkgo v1.16.5 // indirect
-	github.com/onsi/gomega v1.27.10 // indirect
-	github.com/pelletier/go-toml/v2 v2.1.1 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.12 // indirect
-	golang.org/x/arch v0.6.0 // indirect
-	golang.org/x/crypto v0.17.0 // indirect
-	golang.org/x/exp v0.0.0-20231226003508-02704c960a9b // indirect
-	golang.org/x/net v0.19.0 // indirect
-	golang.org/x/sys v0.15.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
-	google.golang.org/protobuf v1.32.0 // indirect
+	go.uber.org/ratelimit v0.3.1
+	golang.org/x/arch v0.8.0 // indirect
+	golang.org/x/crypto v0.23.0 // indirect
+	golang.org/x/exp v0.0.0-20240506185415-9bf2ced13842 // indirect
+	golang.org/x/net v0.25.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/text v0.15.0 // indirect
+	google.golang.org/protobuf v1.34.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,65 +1,47 @@
-github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
-github.com/bytedance/sonic v1.10.0-rc/go.mod h1:ElCzW+ufi8qKqNW0FY314xriJhyJhuoJ3gFZdAHF7NM=
-github.com/bytedance/sonic v1.10.2 h1:GQebETVBxYB7JGWJtLBi07OVzWwt+8dWA00gEVW2ZFE=
-github.com/bytedance/sonic v1.10.2/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
-github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY=
-github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
-github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d h1:77cEq6EriyTZ0g/qfRdp61a3Uu/AWrgIq2s0ClJV1g0=
-github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d/go.mod h1:8EPpVsBuRksnlj1mLy4AWzRNQYxauNi62uWcE3to6eA=
-github.com/chenzhuoyu/iasm v0.9.0/go.mod h1:Xjy2NpN3h7aUqeqM+woSuuvxmIe6+DDsiNLIrkAmYog=
-github.com/chenzhuoyu/iasm v0.9.1 h1:tUHQJXo3NhBqw6s33wkGn9SP3bvrWLdlVIJ3hQBL7P0=
-github.com/chenzhuoyu/iasm v0.9.1/go.mod h1:Xjy2NpN3h7aUqeqM+woSuuvxmIe6+DDsiNLIrkAmYog=
+github.com/benbjohnson/clock v1.3.0 h1:ip6w0uFQkncKQ979AypyG0ER7mqUSBdKLOgAle/AT8A=
+github.com/benbjohnson/clock v1.3.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
+github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0=
+github.com/bytedance/sonic v1.11.6/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4=
+github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM=
+github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=
+github.com/cloudwego/base64x v0.1.4 h1:jwCgWpFanWmN8xoIUHa2rtzmkd5J2plF/dnLS6Xd/0Y=
+github.com/cloudwego/base64x v0.1.4/go.mod h1:0zlkT4Wn5C6NdauXdJRhSKRlJvmclQ1hhJgA0rcu/8w=
+github.com/cloudwego/iasm v0.2.0 h1:1KNIy1I1H9hNNFEEH3DVnI4UujN+1zjpuk6gwHLTssg=
+github.com/cloudwego/iasm v0.2.0/go.mod h1:8rXZaNYT2n95jn+zTI1sDr+IgcD2GVs0nlbbQPiEFhY=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
-github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/gabriel-vasile/mimetype v1.4.3 h1:in2uUcidCuFcDKtdcBxlR0rJ1+fsokWf+uqxgUFjbI0=
 github.com/gabriel-vasile/mimetype v1.4.3/go.mod h1:d8uq/6HKRL6CGdk+aubisF/M5GcPfT7nKyLpA0lbSSk=
 github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
-github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg=
-github.com/gin-gonic/gin v1.9.1/go.mod h1:hPrL7YrpYKXt5YId3A/Tnip5kqbEAP+KLuI3SUcPTeU=
+github.com/gin-gonic/gin v1.10.0 h1:nTuyha1TYqgedzytsKYqna+DfLos46nTv2ygFy86HFU=
+github.com/gin-gonic/gin v1.10.0/go.mod h1:4PMNQiOhvDRa013RKVbsiNwoyezlm2rm0uX/T7kzp5Y=
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lobbies/lobby.go

@@ -1,4 +1,4 @@
-package lobby_registry
+package lobbies
 
 import (
 	"mchess_server/chess"

lobbies/registry.go

@@ -1,4 +1,4 @@
-package lobby_registry
+package lobbies
 
 import (
 	"mchess_server/utils"

lobbies/usher.go

@@ -0,0 +1,50 @@
+package lobbies
+
+import (
+	"mchess_server/chess"
+	"mchess_server/utils"
+
+	"github.com/google/uuid"
+)
+
+type Usher struct {
+}
+
+var usherInstance *Usher
+
+func newUsher() *Usher {
+	return &Usher{}
+}
+
+func GetUsher() *Usher {
+	if usherInstance == nil {
+		usherInstance = newUsher()
+	}
+	return usherInstance
+}
+
+func (u *Usher) WelcomeNewPlayer(player *chess.Player) *Lobby {
+	lobby := GetLobbyRegistry().GetLobbyForPlayer()
+	return lobby
+}
+
+func (u *Usher) CreateNewPrivateLobby(player *chess.Player) *Lobby {
+	lobby := GetLobbyRegistry().CreateNewPrivateLobby()
+	return lobby
+}
+
+func (u *Usher) FindExistingPrivateLobby(p utils.Passphrase) *Lobby {
+	lobby := GetLobbyRegistry().GetLobbyByPassphrase(p)
+	if lobby == nil || lobby.IsFull() {
+		return nil
+	}
+	return lobby
+}
+
+func (*Usher) GetLobbyByID(id uuid.UUID) *Lobby {
+	return GetLobbyRegistry().GetLobbyByUUID(id)
+}
+
+func (u *Usher) AddPlayerToLobbyAndStartGameIfFull(player *chess.Player, lobby *Lobby) {
+	lobby.AddPlayerAndStartGameIfFull(player)
+}

main.go

@@ -1,28 +1,16 @@
 package main
 
 import (
-	"context"
-	"encoding/json"
 	"flag"
-	"fmt"
 	"log"
-	"mchess_server/api"
-	"mchess_server/chess"
-	lobbies "mchess_server/lobby_registry"
-	"mchess_server/usher"
-	"mchess_server/utils"
-	"net/http"
-	"sync"
+	"mchess_server/api/handler"
 
 	"github.com/gin-gonic/gin"
-	"github.com/google/uuid"
-	"nhooyr.io/websocket"
 )
 
 var cert_path = "/etc/letsencrypt/live/chess.sw-gross.de/"
 var cert_file = cert_path + "fullchain.pem"
 var key_file = cert_path + "privkey.pem"
-var mut sync.Mutex
 
 func main() {
 	var debugMode bool
@@ -35,10 +23,13 @@ func main() {
 	}
 
 	router := gin.Default()
-	router.GET("/api/random", registerForRandomGame)
-	router.GET("/api/hostPrivate", hostPrivateGame)
-	router.POST("/api/joinPrivate", joinPrivateGame)
-	router.GET("/api/ws", registerWebSocketConnection)
+	router.GET("/api/hostPrivate", handler.HostGameHandler)
+	router.POST("/api/joinPrivate", handler.JoinPrivateGame)
+	router.GET("/api/ws", handler.RegisterWebSocketConnection)
+
+	router.GET("/api/getLobbyForPassphrase/:phrase", handler.GetLobbyForPassphraseHandler)
+	router.GET("/api/registerWsForGame/:id", handler.ConnectWsForGame)
+	router.POST("/api/joinGame/:id", handler.JoinGameHandler)
 
 	if debugMode {
 		log.Println("Starting service WITHOUT TLS")
@@ -50,139 +41,3 @@ func main() {
 		log.Fatal(router.RunTLS("chess.sw-gross.de:9999", cert_file, key_file))
 	}
 }
-
-func registerForRandomGame(c *gin.Context) {
-	player := chess.NewPlayer(uuid.New())
-	usher := usher.GetUsher()
-
-	mut.Lock()
-	defer mut.Unlock()
-	lobby := usher.WelcomeNewPlayer(player)
-	usher.AddPlayerToLobbyAndStartGameIfFull(player, lobby)
-
-	info := api.PlayerInfo{
-		PlayerID: &player.Uuid,
-		LobbyID:  &lobby.Uuid,
-	}
-	log.Println("responding with info ", info)
-
-	c.Header("Access-Control-Allow-Origin", "*")
-	c.IndentedJSON(http.StatusOK, info)
-}
-
-func hostPrivateGame(c *gin.Context) {
-	player := chess.NewPlayer(uuid.New())
-	u := usher.GetUsher()
-
-	mut.Lock()
-	defer mut.Unlock()
-	lobby := u.CreateNewPrivateLobby(player)
-	u.AddPlayerToLobbyAndStartGameIfFull(player, lobby)
-
-	passphrase := lobby.Passphrase.String()
-	info := api.PlayerInfo{
-		PlayerID:   &player.Uuid,
-		LobbyID:    &lobby.Uuid,
-		Passphrase: &passphrase,
-	}
-	c.Header("Access-Control-Allow-Origin", "*")
-	c.IndentedJSON(http.StatusOK, info)
-}
-
-func joinPrivateGame(c *gin.Context) {
-	req := api.PlayerInfo{}
-	log.Println(c.Request.Body)
-	err := c.ShouldBindJSON(&req)
-	if err != nil || req.Passphrase == nil || *req.Passphrase == "" {
-		c.IndentedJSON(http.StatusNotFound, req)
-	}
-
-	u := usher.GetUsher()
-
-	if req.Passphrase != nil &&
-		*req.Passphrase != "" &&
-		req.PlayerID != nil &&
-		req.LobbyID != nil { //is reconnect
-		lobby := u.FindExistingPrivateLobby(utils.Passphrase(*req.Passphrase))
-		_, found := lobby.GetPlayerByUUID(*req.PlayerID)
-		if found {
-			c.IndentedJSON(
-				http.StatusOK,
-				api.PlayerInfo{
-					PlayerID:   req.PlayerID,
-					LobbyID:    req.LobbyID,
-					Passphrase: req.Passphrase,
-				})
-			return
-		} else {
-			c.IndentedJSON(http.StatusNotFound, req)
-		}
-	}
-
-	player := chess.NewPlayer(uuid.New())
-
-	mut.Lock()
-	defer mut.Unlock()
-	lobby := u.FindExistingPrivateLobby(utils.Passphrase(*req.Passphrase))
-	if lobby != nil {
-		u.AddPlayerToLobbyAndStartGameIfFull(player, lobby)
-	} else {
-		c.IndentedJSON(http.StatusNotFound, req)
-		return
-	}
-
-	info := api.PlayerInfo{
-		PlayerID:   &player.Uuid,
-		LobbyID:    &lobby.Uuid,
-		Passphrase: req.Passphrase,
-	}
-	c.Header("Access-Control-Allow-Origin", "*")
-	c.IndentedJSON(http.StatusOK, info)
-}
-
-func registerWebSocketConnection(c *gin.Context) {
-	webSocketConn, err := websocket.Accept(c.Writer, c.Request, &websocket.AcceptOptions{OriginPatterns: []string{"chess.sw-gross.de", "localhost:*"}})
-	if err != nil {
-		log.Println(err)
-		return
-	}
-	go waitForAndHandlePlayerID(c, webSocketConn)
-}
-
-func waitForAndHandlePlayerID(ctx context.Context, conn *websocket.Conn) {
-	msgType, msg, err := conn.Read(ctx)
-	if err != nil {
-		errorMessage := fmt.Sprintf("Reading from websocket connection did not work: %s", err)
-		log.Println(errorMessage)
-		conn.Close(websocket.StatusCode(400), errorMessage)
-		return
-	}
-
-	log.Println("read from websocket endpoint: ", msgType, string(msg), err)
-
-	var info api.PlayerInfo
-	err = json.Unmarshal(msg, &info)
-	if err != nil {
-		errorMessage := fmt.Sprintf("Unmarshaling message did not work: %s", err)
-		log.Println(errorMessage)
-		conn.Close(websocket.StatusCode(400), errorMessage)
-		return
-	}
-
-	lobby := lobbies.GetLobbyRegistry().GetLobbyByUUID(*info.LobbyID)
-	if lobby == nil {
-		conn.Close(websocket.StatusCode(400), "lobby not found")
-		return
-	}
-
-	player, found := lobby.GetPlayerByUUID(*info.PlayerID)
-	if !found {
-		conn.Close(websocket.StatusCode(400), "player not found")
-		return
-	}
-	if player.Conn.HasWebsocketConnection() {
-		player.Conn.Close("closing existing connection")
-	}
-	lobby.Game.SetWebsocketConnectionFor(ctx, player, conn)
-	log.Println("player after setting connection: ", player)
-}

usher/usher.go

@@ -1,45 +0,0 @@
-package usher
-
-import (
-	"mchess_server/chess"
-	lobbies "mchess_server/lobby_registry"
-	"mchess_server/utils"
-)
-
-type Usher struct {
-}
-
-var instance *Usher
-
-func newUsher() *Usher {
-	return &Usher{}
-}
-
-func GetUsher() *Usher {
-	if instance == nil {
-		instance = newUsher()
-	}
-	return instance
-}
-
-func (u *Usher) WelcomeNewPlayer(player *chess.Player) *lobbies.Lobby {
-	lobby := lobbies.GetLobbyRegistry().GetLobbyForPlayer()
-	return lobby
-}
-
-func (u *Usher) CreateNewPrivateLobby(player *chess.Player) *lobbies.Lobby {
-	lobby := lobbies.GetLobbyRegistry().CreateNewPrivateLobby()
-	return lobby
-}
-
-func (u *Usher) FindExistingPrivateLobby(p utils.Passphrase) *lobbies.Lobby {
-	lobby := lobbies.GetLobbyRegistry().GetLobbyByPassphrase(p)
-	if lobby == nil || lobby.IsFull() {
-		return nil
-	}
-	return lobby
-}
-
-func (u *Usher) AddPlayerToLobbyAndStartGameIfFull(player *chess.Player, lobby *lobbies.Lobby) {
-	lobby.AddPlayerAndStartGameIfFull(player)
-}

utils/passphrase.go

@@ -2,101 +2,56 @@ package utils
 
 import (
 	"strings"
-
-	"github.com/tjarratt/babble"
+	"unicode"
 )
 
 type Passphrase string
 
 func NewPassphrase() Passphrase {
 	var phrase string
-	var retries int
 	var word string
-	var words = 2
+	var words = 3
+
 	//TODO make sure passphrases are unique
 	for words > 0 {
-		retries = 20
-		for {
-			word = getCleanWord()
-			if isAccecpable(word) {
-				phrase = phrase + word + " "
-				break
-			}
-			if retries == 1 { //this is our last try, we take any word
-				phrase = phrase + word + " "
-			}
-			retries -= 1
-		}
+		word = getCleanWord()
+		phrase = phrase + word + " "
 		words -= 1
 	}
 	return Passphrase(strings.TrimSpace(phrase))
 }
 
+func NewPassphraseFromString(s string) Passphrase {
+	return Passphrase(s)
+}
+
+func (p Passphrase) AsURLParam() string {
+	var result string
+	phraseAsString := p.String()
+
+	segments := strings.Split(phraseAsString, " ")
+
+	for _, segment := range segments {
+		runes := []rune(segment)
+		runes[0] = unicode.ToUpper(runes[0])
+		result += string(runes)
+	}
+
+	return result
+}
+
+func ConvertToPassphraseWithSpaces(s string) Passphrase {
+	result := ""
+	for _, rune := range s {
+		if unicode.IsUpper(rune) {
+			result += " "
+		}
+		result += strings.ToLower(string(rune))
+	}
+
+	return NewPassphraseFromString(strings.Trim(result, " "))
+}
+
 func (p Passphrase) String() string {
 	return string(p)
 }
-
-func isAccecpable(s string) bool {
-	l := len(s)
-	if l > 8 || l < 3 {
-		return false
-	}
-
-	for _, rune := range s {
-		if !isEnglishLetter(rune) {
-			return false
-		}
-	}
-	return true
-}
-
-func isProfanity(s string) bool {
-	contains := []string{
-		"nigg",
-		"fag",
-		"ass",
-		"bitch",
-		"rape",
-		"ass",
-		"scrot",
-		"rect",
-	}
-	startsWith := []string{
-		"spic",
-		"chin",
-		"cunt",
-	}
-
-	for _, word := range contains {
-		if strings.Contains(s, word) {
-			return true
-		}
-	}
-	for _, word := range startsWith {
-		if strings.HasPrefix(s, word) {
-			return true
-		}
-	}
-	return false
-}
-
-func isEnglishLetter(r rune) bool {
-	if (r < 'a' || r > 'z') && (r < 'A' || r > 'Z') {
-		return false
-	}
-	return true
-}
-
-func getCleanWord() string {
-	var word string
-
-	babbler := babble.NewBabbler()
-	babbler.Count = 1
-
-	for {
-		word = babbler.Babble()
-		if !isProfanity(word) {
-			return word
-		}
-	}
-}

utils/passphrase_test.go

@@ -0,0 +1,36 @@
+package utils
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_onlyUniqueWords(t *testing.T) {
+	wordsDistribution := make(map[string]int)
+
+	for _, word := range CleanWords {
+		wordsDistribution[word] += 1
+	}
+
+	for _, v := range wordsDistribution {
+		assert.Equal(t, 1, v)
+	}
+
+	assert.Equal(t, numberOfCleanWords, len(wordsDistribution))
+}
+
+func Test_Passphrase_AsURLParam(t *testing.T) {
+	phrase := NewPassphraseFromString("this is a Test phrase")
+
+	asParams := phrase.AsURLParam()
+
+	assert.Equal(t, "ThisIsATestPhrase", asParams)
+}
+
+func Test_Passphrase_ConvertToPassphraseWithSpaces(t *testing.T) {
+	fromURL := "ThisIsATestPhraseWithManyWords"
+	phrase := ConvertToPassphraseWithSpaces(fromURL)
+
+	assert.Equal(t, NewPassphraseFromString("this is a test phrase with many words"), phrase)
+}