THIS IS JUST A TEST

.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+	// Use IntelliSense to learn about possible attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Launch Package",
+			"type": "go",
+			"request": "launch",
+			"mode": "debug",
+			"program": "${workspaceFolder}/main.go"
+		}
+	]
+}

README

@@ -1,3 +1,2 @@
-Prerequisites:
     1. Install a word file:
         the server uses babbler that expects a word list at /usr/share/dict/words in order to generate the passphrases for lobbies.

api/handler/handler.go

@@ -1,139 +0,0 @@
-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,
-		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
-	}
-
-	passphrase := api.Passphrase{
-		Value: (*string)(&lobby.Passphrase),
-	}
-
-	c.Header("Access-Control-Allow-Origin", "*")
-	c.IndentedJSON(http.StatusOK, passphrase)
-}
-
-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)
-		return
-	}
-
-	u := lobbies.GetUsher()
-
-	if req.PlayerID != nil { //is reconnect
-		lobby := u.FindExistingPrivateLobby(utils.Passphrase(*req.Passphrase))
-		var found bool
-		if lobby != nil {
-			_, found = lobby.GetPlayerByUUID(*req.PlayerID)
-		}
-		if found {
-			c.Header("Access-Control-Allow-Origin", "*")
-			c.IndentedJSON(
-				http.StatusOK,
-				api.PlayerInfo{
-					PlayerID:   req.PlayerID,
-					Passphrase: req.Passphrase,
-				})
-			return
-		} else {
-			c.IndentedJSON(http.StatusNotFound, req)
-			return
-		}
-	}
-
-	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,
-		Passphrase: req.Passphrase,
-	}
-	c.Header("Access-Control-Allow-Origin", "*")
-	c.IndentedJSON(http.StatusOK, info)
-}
-
-func JoinGameHandler(c *gin.Context) {
-	limiter.Take()
-
-	passphrase := api.Passphrase{}
-	err := c.ShouldBindJSON(&passphrase)
-	if err != nil {
-		c.IndentedJSON(http.StatusBadRequest, nil)
-		return
-	}
-
-	u := lobbies.GetUsher()
-	lobby := u.FindExistingPrivateLobby(utils.Passphrase(*passphrase.Value))
-	if lobby == nil {
-		c.IndentedJSON(http.StatusNotFound, nil)
-		return
-	}
-
-	lobbyInfo := api.Passphrase{
-		Value: (*string)(&lobby.Passphrase),
-	}
-
-	c.IndentedJSON(http.StatusOK, lobbyInfo)
-}

api/handler/handler_test.go

@@ -1,55 +0,0 @@
-package handler
-
-import (
-	"encoding/json"
-	"mchess_server/api"
-	"mchess_server/utils"
-	"net/http"
-	"net/http/httptest"
-	"testing"
-
-	"github.com/gin-gonic/gin"
-	"github.com/stretchr/testify/assert"
-)
-
-func Test_GetLobbyFromPassphraseHandler(t *testing.T) {
-	var passphraseURLParameter string
-	var receivedPhrase string
-
-	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
-
-		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)
-
-		passhrase := api.Passphrase{}
-		err := json.Unmarshal(r2.Body.Bytes(), &passhrase)
-		assert.NoError(t, err)
-
-		assert.Equal(t, http.StatusOK, r2.Code)
-	})
-}

api/handler/websocket.go

@@ -1,83 +0,0 @@
-package handler
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"log"
-	"mchess_server/api"
-	"mchess_server/utils"
-	"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()
-
-	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().GetLobbyByPassphrase(utils.NewPassphraseFromString(*info.Passphrase))
-	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
-	}
-
-	lobby.Game.SetWebsocketConnectionFor(ctx, player, conn)
-
-	log.Println("player after setting connection: ")
-	log.Println("id: ", player.Uuid)
-	log.Println("color: ", player.GetColor())
-	log.Println("Connection: ", player.Conn.ID)
-}
-
-func ConnectWsForGame(c *gin.Context) {
-	limiter.Take()
-
-}

api/passphrase.go

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

api/player_info.go

@@ -4,5 +4,6 @@ import "github.com/google/uuid"
 
 type PlayerInfo struct {
 	PlayerID   *uuid.UUID `json:"playerID,omitempty"`
+	LobbyID    *uuid.UUID `json:"lobbyID,omitempty"`
 	Passphrase *string    `json:"passphrase,omitempty"`
 }

chess/board.go

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

chess/board_castling_test.go

@@ -1,329 +0,0 @@
-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

@@ -8,7 +8,8 @@ import (
 	"mchess_server/types"
 
 	"github.com/google/uuid"
-	gorillaws "github.com/gorilla/websocket"
+	"github.com/samber/lo"
+	"nhooyr.io/websocket"
 )
 
 type Game struct {
@@ -58,8 +59,8 @@ func (game Game) GetPlayer2() *Player {
 }
 
 func (game *Game) prepare() {
-	game.players[0].SetColor(types.White)
-	game.players[1].SetColor(types.Black)
+	game.players[0].color = types.White
+	game.players[1].color = types.Black
 
 	game.currentTurnPlayer = game.GetPlayer1()
 
@@ -99,13 +100,13 @@ func (game *Game) Handle() {
 			game.gameState = PlayerToMove
 
 		case PlayerToMove:
-			log.Println("with ", game.currentTurnPlayer.GetColor(), " to move")
+			log.Println("with ", game.currentTurnPlayer.GetPlayerColor(), " to move")
 			receivedMove, err = game.currentTurnPlayer.ReadMove()
 			if err != nil {
 				log.Println("Error while reading message:", err)
 				return
 			}
-			log.Println("Player ", game.currentTurnPlayer.color.String(), " moved:\n", receivedMove)
+			log.Println("Player ", game.currentTurnPlayer, " moved:\n", receivedMove)
 
 			game.gameState = CheckMove
 		case CheckMove:
@@ -117,7 +118,7 @@ func (game *Game) Handle() {
 					log.Println("Error marshalling 'colorDetermined' message for player 1", err)
 					return
 				}
-				game.currentTurnPlayer.writeMessage(string(invalidMoveMessage))
+				game.currentTurnPlayer.writeMessage(invalidMoveMessage)
 				game.gameState = PlayerToMove
 				continue
 			}
@@ -157,14 +158,6 @@ func (game *Game) AddPlayersToGame(player *Player) {
 	game.players = append(game.players, player)
 }
 
-func (game *Game) AreBothPlayersConnected() bool {
-	if len(game.GetPlayers()) < 2 {
-		return false
-	}
-
-	return game.players[0].hasWebsocketConnection() && game.players[1].hasWebsocketConnection()
-}
-
 func (game *Game) killGame() {
 	log.Println("Game should be killed")
 }
@@ -181,22 +174,21 @@ func (game Game) notifyPlayersAboutGameStart() error {
 		return err
 	}
 
-	game.GetPlayer1().writeMessage(string(colorDeterminedPlayer1))
+	game.GetPlayer1().writeMessage(colorDeterminedPlayer1)
 	game.GetPlayer1().SendBoardState(types.Move{}, game.board.PGN(), types.White)
 
-	game.GetPlayer2().writeMessage(string(colorDeterminedPlayer2))
+	game.GetPlayer2().writeMessage(colorDeterminedPlayer2)
 	game.GetPlayer2().SendBoardState(types.Move{}, game.board.PGN(), types.White)
 	return nil
 }
 
 func (game Game) broadcastMove(move types.Move) error {
-	log.Println("broadcast move")
-	err := game.GetPlayer1().SendBoardState(move, game.board.PGN(), game.currentTurnPlayer.GetColor())
+	err := game.GetPlayer1().SendBoardState(move, game.board.PGN(), game.currentTurnPlayer.color)
 	if err != nil {
 		return err
 	}
 
-	err = game.GetPlayer2().SendBoardState(move, game.board.PGN(), game.currentTurnPlayer.GetColor())
+	err = game.GetPlayer2().SendBoardState(move, game.board.PGN(), game.currentTurnPlayer.color)
 	if err != nil {
 		return err
 	}
@@ -218,12 +210,13 @@ 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 *gorillaws.Conn) {
-	p.SetWebsocketConnectionAndSendBoardState(ctx, ws, &game.board)
-}
-
-func (game *Game) SendBoardStateTo(p *Player) {
-	p.SendBoardState(game.board.getLastMove(), game.board.PGN(), game.board.colorToMove)
+func (game *Game) SetWebsocketConnectionFor(ctx context.Context, p *Player, ws *websocket.Conn) {
+	p.SetWebsocketConnectionAndSendBoardState(ctx, ws, game.board.PGN(), game.board.colorToMove)
 }

chess/king.go

@@ -29,26 +29,25 @@ func (k King) AfterMoveAction(board *Board, fromSquare types.Coordinate) {
 	}
 }
 
-func (k King) HandleCastling(board *Board, move types.Move) (bool, Violation) {
-	if !k.isMoveCastlingMove(board, move) {
-		return false, ""
-	}
-
+func (k King) HandleCastling(board *Board, move types.Move) (bool, error) {
 	if k.hadMovedBefore(board) {
-		return false, ""
+		return false, nil
 	}
 
-	if board.isSquareAttacked(move.StartSquare, k.Color.Opposite()) {
-		return false, CastlingWhileKingInCheck
-	}
-
-	valid, dir := k.isCastlingAllowed(board, move)
+	valid, dir := k.movedOnValidCastlingSquare(board, move)
 	if !valid {
-		return false, ""
+		return false, nil
+	}
+
+	switch k.Color {
+	case types.White:
+		board.state.WhiteKingMoved = true
+	case types.Black:
+		board.state.BlackKingMoved = true
 	}
 
 	k.playCastlingOnBoard(board, move, dir)
-	return true, ""
+	return true, nil
 }
 
 func (k King) hadMovedBefore(b *Board) bool {
@@ -65,95 +64,52 @@ func (k King) hadMovedBefore(b *Board) bool {
 type CastlingDirection string
 
 const (
-	NoDirection   CastlingDirection = ""
 	CastlingRight CastlingDirection = "right"
 	CastlingLeft  CastlingDirection = "left"
 )
 
-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) {
+func (k King) movedOnValidCastlingSquare(b *Board, move types.Move) (bool, CastlingDirection) {
 	var valid = false
 
 	switch k.Color {
 	case types.White:
-		destinationSquareForKingRight := types.Coordinate{Col: 7, Row: 1}
-		destinationSquareForKingLeft := types.Coordinate{Col: 3, Row: 1}
+		castlingSquareRight := types.Coordinate{Col: 7, Row: 1}
+		castlingSquareLeft := types.Coordinate{Col: 3, Row: 1}
 
-		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) &&
+		if move.EndSquare == castlingSquareRight &&
+			b.getPieceAt(castlingSquareRight) == nil &&
+			b.getPieceAt(*castlingSquareRight.Left(1)) == nil &&
 			!b.state.WhiteHRookMoved {
-			_, ok := b.getPieceAt(types.Coordinate{Col: 8, Row: 1}).(Rook)
-			if ok {
-				return true, CastlingRight
-			}
+			return true, CastlingRight
 		}
 
-		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) &&
+		if move.EndSquare == castlingSquareLeft &&
+			b.getPieceAt(castlingSquareLeft) == nil &&
+			b.getPieceAt(*castlingSquareLeft.Right(1)) == nil &&
+			b.getPieceAt(*castlingSquareLeft.Left(1)) == nil &&
 			!b.state.WhiteARookMoved {
-			_, ok := b.getPieceAt(types.Coordinate{Col: 1, Row: 1}).(Rook)
-			if ok {
-				return true, CastlingLeft
-			}
+			return true, CastlingLeft
 		}
 	case types.Black:
-		destinationSquareForKingRight := types.Coordinate{Col: 7, Row: 8}
-		destinationSquareForKingLeft := types.Coordinate{Col: 3, Row: 8}
+		castlingSquareRight := types.Coordinate{Col: 7, Row: 8}
+		castlingSquareLeft := types.Coordinate{Col: 3, Row: 8}
 
-		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) &&
+		if move.EndSquare == castlingSquareRight &&
+			b.getPieceAt(castlingSquareRight) == nil &&
+			b.getPieceAt(*castlingSquareRight.Left(1)) == nil &&
 			!b.state.BlackHRookMoved {
-			_, ok := b.getPieceAt(types.Coordinate{Col: 8, Row: 8}).(Rook)
-			if ok {
-				return true, CastlingRight
-			}
+			return true, CastlingRight
 		}
 
-		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) &&
+		if move.EndSquare == castlingSquareLeft &&
+			b.getPieceAt(castlingSquareLeft) == nil &&
+			b.getPieceAt(*castlingSquareLeft.Right(1)) == nil &&
+			b.getPieceAt(*castlingSquareLeft.Left(1)) == nil &&
 			!b.state.BlackARookMoved {
-			_, ok := b.getPieceAt(types.Coordinate{Col: 1, Row: 8}).(Rook)
-			if ok {
-				return true, CastlingLeft
-			}
+			return true, CastlingLeft
 		}
 	}
-	return valid, NoDirection
+	return valid, CastlingRight
 }
 
 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, Violation) {
+func (p *Pawn) HandlePossiblePromotion(b *Board, move types.Move) (bool, error) {
 	var isPromotionMove bool
 	var promotionToPiece types.PieceShortName
 
@@ -62,14 +62,14 @@ func (p *Pawn) HandlePossiblePromotion(b *Board, move types.Move) (bool, Violati
 		b.position[move.EndSquare] = GetPieceForShortName(promotionToPiece)
 	}
 
-	return isPromotionMove, ""
+	return isPromotionMove, nil
 }
 
-func (p *Pawn) HandleEnPassant(b *Board, move, lastMove types.Move) (bool, Violation) {
+func (p *Pawn) HandleEnPassant(b *Board, move, lastMove types.Move) (bool, error) {
 	var wasEnPassant bool
 
 	if lastMove.PieceMoved.ToCommon() != types.PawnShortName {
-		return false, ""
+		return false, nil
 	}
 
 	switch move.ColorMoved {
@@ -127,7 +127,7 @@ func (p *Pawn) HandleEnPassant(b *Board, move, lastMove types.Move) (bool, Viola
 		b.position[move.EndSquare] = GetPieceForShortName(move.PieceMoved)
 	}
 
-	return wasEnPassant, ""
+	return wasEnPassant, nil
 }
 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"
-	gorillaws "github.com/gorilla/websocket"
+	"nhooyr.io/websocket"
 )
 
 type Player struct {
@@ -34,27 +34,18 @@ func (p Player) hasWebsocketConnection() bool {
 	return p.Conn.HasWebsocketConnection()
 }
 
-func (p *Player) SetWebsocketConnection(ctx context.Context, ws *gorillaws.Conn) {
+func (p *Player) SetWebsocketConnection(ctx context.Context, ws *websocket.Conn) {
 	p.Conn.SetWebsocketConnection(ws)
-	p.Conn.SetForColor(p.color)
 }
 
 func (p *Player) SetWebsocketConnectionAndSendBoardState(
 	ctx context.Context,
-	ws *gorillaws.Conn,
-	board *Board,
+	ws *websocket.Conn,
+	boardPosition string,
+	turnColor types.ChessColor,
 ) {
 	p.SetWebsocketConnection(ctx, ws)
-	p.SendBoardState(board.getLastMove(), board.PGN(), board.colorToMove)
-}
-
-func (p *Player) SetColor(color types.ChessColor) {
-	p.color = color
-	p.Conn.SetForColor(p.color)
-}
-
-func (p *Player) GetColor() types.ChessColor {
-	return p.color
+	p.SendBoardState(types.Move{}, boardPosition, turnColor)
 }
 
 func (p *Player) SetDisconnectCallback(cb func(*Player)) {
@@ -72,8 +63,8 @@ func (p *Player) IsInGame() bool {
 }
 
 func (p *Player) SendBoardState(move types.Move, boardPosition string, turnColor types.ChessColor) error {
-	var pColor = p.GetColor()
-	if p.GetColor() == "" { // we default to white if we do not know the color yet
+	var pColor = p.color
+	if p.color == "" { // we default to white if we do not know the color yet
 		pColor = types.White
 	}
 
@@ -89,8 +80,11 @@ func (p *Player) SendBoardState(move types.Move, boardPosition string, turnColor
 		return err
 	}
 
-	p.writeMessage(string(messageToSend))
-
+	err = p.writeMessage(messageToSend)
+	if err != nil {
+		log.Println("Error during message writing:", err)
+		return err
+	}
 	return nil
 }
 
@@ -105,8 +99,11 @@ func (p *Player) SendMoveAndPosition(move types.Move, boardPosition string) erro
 		return err
 	}
 
-	p.writeMessage(string(messageToSend))
-
+	err = p.writeMessage(messageToSend)
+	if err != nil {
+		log.Println("Error during message writing:", err)
+		return err
+	}
 	return nil
 }
 
@@ -120,20 +117,26 @@ func (p *Player) SendGameEnded(reason GameEndedReason) error {
 		log.Println("Error while marshalling: ", err)
 		return err
 	}
-	p.writeMessage(string(messageToSend))
-
+	err = p.writeMessage(messageToSend)
+	if err != nil {
+		log.Println("Error during message writing:", err)
+		return err
+	}
 	return nil
 }
 
-func (p *Player) writeMessage(msg string) {
-	p.Conn.Write(msg)
+func (p *Player) writeMessage(msg []byte) error {
+	return p.Conn.Write(msg)
 }
 
 func (p *Player) ReadMove() (types.Move, error) {
-	receivedMessage := p.readMessage()
+	receivedMessage, err := p.readMessage()
+	if err != nil {
+		return types.Move{}, err
+	}
 
 	var msg api.WebsocketMessage
-	err := json.Unmarshal(receivedMessage, &msg)
+	err = json.Unmarshal(receivedMessage, &msg)
 	if err != nil {
 		return types.Move{}, err
 	}
@@ -145,9 +148,13 @@ func (p *Player) ReadMove() (types.Move, error) {
 	return *msg.Move, nil
 }
 
-func (p *Player) readMessage() []byte {
-	msg := p.Conn.Read()
-	log.Printf("Reading message from %s: %s", p.color.String(), string(msg))
+func (p *Player) readMessage() ([]byte, error) {
+	msg, err := p.Conn.Read()
+	log.Printf("Reading message: %s from player %s", string(msg), p.Uuid.String())
 
-	return msg
+	return msg, err
+}
+
+func (p Player) GetPlayerColor() string {
+	return string(p.color)
 }

chess/violation.go

@@ -3,15 +3,12 @@ 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"
-	CastlingThroughCheck     Violation = "king would move through check"
-	CastlingWhileKingInCheck Violation = "king cannot castle while in check"
-	CastlingKingMovedBefore  Violation = "king cannot caslte because he moved before"
+	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"
 )
 
 func (v Violation) String() string {

connection/message_buffer.go

@@ -50,7 +50,7 @@ func (b *MessageBuffer) Insert(msg string) {
 	b.cond.Broadcast()
 }
 
-func (b *MessageBuffer) Get() string {
+func (b *MessageBuffer) Get() (string, error) {
 	b.cond.L.Lock()
 	defer b.cond.L.Unlock()
 
@@ -69,7 +69,7 @@ func (b *MessageBuffer) Get() string {
 	}
 	b.getIndex = b.incrementAndWrapIndex(b.getIndex)
 
-	return msg.content
+	return msg.content, nil
 }
 
 func (b MessageBuffer) incrementAndWrapIndex(index int) int {

connection/message_buffer_test.go

@@ -66,7 +66,8 @@ func Test_MessageBuffer_GetWaitsForFirstData(t *testing.T) {
 		buf.Insert("delayed-message")
 	}()
 
-	msg := buf.Get()
+	msg, err := buf.Get()
+	assert.NoError(t, err)
 
 	endTime := time.Now()
 
@@ -78,7 +79,8 @@ func Test_MessageBuffer_GetWaitsForNewData(t *testing.T) {
 	buf := newMessageBuffer(2)
 
 	buf.Insert("message-1")
-	msg := buf.Get()
+	msg, err := buf.Get()
+	assert.NoError(t, err)
 	assert.Equal(t, "message-1", msg)
 
 	go func() {
@@ -87,7 +89,8 @@ func Test_MessageBuffer_GetWaitsForNewData(t *testing.T) {
 		buf.Insert("delayed-message")
 	}()
 
-	msg = buf.Get()
+	msg, err = buf.Get()
+	assert.NoError(t, err)
 	assert.Equal(t, "delayed-message", msg)
 }
 
@@ -114,7 +117,8 @@ func Test_MessageBuffer_IndexesAreCorrectAfterOverwritingOldData(t *testing.T) {
 		},
 		buf.messages)
 
-	msg := buf.Get()
+	msg, err := buf.Get()
+	assert.NoError(t, err)
 	assert.Equal(t, "message-2", msg)
 }
 
@@ -122,11 +126,13 @@ func Test_MessageBuffer_GetWaitsForNewDataIfOldOneWasAlreadyGotten(t *testing.T)
 	buf := newMessageBuffer(2)
 
 	buf.Insert(message1)
-	msg := buf.Get()
+	msg, err := buf.Get()
+	assert.NoError(t, err)
 	assert.Equal(t, message1, msg)
 
 	buf.Insert(message2)
-	msg = buf.Get()
+	msg, err = buf.Get()
+	assert.NoError(t, err)
 	assert.Equal(t, message2, msg)
 
 	go func() {
@@ -134,7 +140,8 @@ func Test_MessageBuffer_GetWaitsForNewDataIfOldOneWasAlreadyGotten(t *testing.T)
 		buf.Insert(message3)
 	}()
 
-	msg = buf.Get()
+	msg, err = buf.Get()
+	assert.NoError(t, err)
 	assert.Equal(t, message3, msg)
 
 }
@@ -150,8 +157,9 @@ func Test_MessageBuffer_InsertCatchesUpWithRead(t *testing.T) {
 	buf.Insert(message6)
 	buf.Insert(message7)
 
-	msg := buf.Get()
+	msg, err := buf.Get()
 
+	assert.NoError(t, err)
 	assert.Equal(t, message3, msg)
 }
 
@@ -164,7 +172,7 @@ func Test_MessageBuffer_FuckShitUp(t *testing.T) {
 	var readMsg = make([]string, 0)
 	go func() {
 		for i := 0; i < size*10; i++ {
-			msg := buf.Get()
+			msg, _ := buf.Get()
 			if msg == "99" {
 				break
 			}

connection/type.go

@@ -3,38 +3,22 @@ package connection
 import (
 	"context"
 	"log"
-	"mchess_server/types"
-	"sync"
 
-	"github.com/google/uuid"
-	gorillaws "github.com/gorilla/websocket"
+	"nhooyr.io/websocket"
 )
 
 type Connection struct {
-	ID                 uuid.UUID
-	ws                 *gorillaws.Conn
-	ctx                context.Context
-	rxBuffer           *MessageBuffer
-	txBuffer           *MessageBuffer
-	disconnectCallback func()
-	forColor           types.ChessColor
-
-	/* this is a hack since a user using the same
-	browser might get the same object of type Connection in two instances of
-	the same browser. Then if  Close() gets called for both of these instances
-	the first Close() will set ws=nil, and the seconds one will dereference this
-	nil pointer. The correct way to fix this, is to make sure, two instances
-	of the same browser do not get the same connection instance.
-	At the moment, the usage of localStorage 'identifies' an already connected
-	player and reuses the old Connection struct instance */
-	closingMutex sync.Mutex
+	ws                      *websocket.Conn
+	wsConnectionEstablished chan bool
+	ctx                     context.Context
+	buffer                  MessageBuffer
+	disconnectCallback      func()
 }
 
 func NewConnection(options ...func(*Connection)) *Connection {
 	connection := Connection{
-		ID:       uuid.New(),
-		rxBuffer: newMessageBuffer(100),
-		txBuffer: newMessageBuffer(100),
+		buffer:                  *newMessageBuffer(100),
+		wsConnectionEstablished: make(chan bool),
 	}
 
 	for _, option := range options {
@@ -44,7 +28,7 @@ func NewConnection(options ...func(*Connection)) *Connection {
 	return &connection
 }
 
-func WithWebsocket(ws *gorillaws.Conn) func(*Connection) {
+func WithWebsocket(ws *websocket.Conn) func(*Connection) {
 	return func(c *Connection) {
 		c.ws = ws
 	}
@@ -64,10 +48,6 @@ func WithDisconnectCallback(cb func()) func(*Connection) {
 	}
 }
 
-func (conn *Connection) SetForColor(color types.ChessColor) {
-	conn.forColor = color
-}
-
 func (conn *Connection) SetDisconnectCallback(cb func()) {
 	conn.disconnectCallback = cb
 }
@@ -76,81 +56,53 @@ func (conn *Connection) HasWebsocketConnection() bool {
 	return conn.ws != nil
 }
 
-func (conn *Connection) readFromRxBuffer() {
-	for {
-		_, msg, err := conn.ws.ReadMessage()
-		if err != nil {
-			conn.logConnection("while reading from websocket: %w", "ERROR:", err.Error())
-			conn.Close("")
-			return
-		}
-		conn.rxBuffer.Insert(string(msg))
-	}
-}
-
-func (conn *Connection) writeTxBuffer() {
-	for {
-		msg := conn.txBuffer.Get()
-
-		if conn.ws == nil {
-			return
-		}
-
-		err := conn.ws.WriteMessage(gorillaws.TextMessage, []byte(msg))
-		if err != nil {
-			conn.logConnection("while writing to websocket: %w", "ERROR:", err.Error())
-			return
-		}
-	}
-}
-
-func (conn *Connection) SetWebsocketConnection(ws *gorillaws.Conn) {
+func (conn *Connection) SetWebsocketConnection(ws *websocket.Conn) {
 	if ws == nil {
-		conn.logConnection("ERROR: setting ws = null")
 		return
 	}
 
 	conn.ws = ws
 
-	go conn.readFromRxBuffer()
-	go conn.writeTxBuffer()
+	select {
+	case conn.wsConnectionEstablished <- true:
+	default:
+	}
 
-	defer conn.logConnection("websocket connection set")
+	go func() {
+		for {
+			_, msg, err := conn.ws.Read(conn.ctx)
+			if err != nil {
+				log.Println("while reading from websocket: %w", err)
+				if conn.disconnectCallback != nil {
+					conn.disconnectCallback()
+				}
+				return
+			}
+			conn.buffer.Insert(string(msg))
+		}
+	}()
 }
 
-func (conn *Connection) Write(msg string) {
-	conn.logConnection("Writing message: ", string(msg))
-	conn.txBuffer.Insert(msg)
+func (conn *Connection) Write(msg []byte) error {
+	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)
 }
 
-func (conn *Connection) Read() []byte {
-	msg := conn.rxBuffer.Get()
+func (conn *Connection) Read() ([]byte, error) {
+	msg, err := conn.buffer.Get()
+	if err != nil {
+		conn.ws = nil
+		return nil, err // TODO: Tell game-handler that connection was lost
+	}
 
-	return []byte(msg)
+	return []byte(msg), err
 }
 
 func (conn *Connection) Close(msg string) {
-	/* This is a hack, do not try this at home.
-	See more details at the definition of Connection */
-	conn.closingMutex.Lock()
-	defer conn.closingMutex.Unlock()
-
-	if conn == nil || conn.ws == nil {
-		return
-	}
-
-	conn.logConnection("closing websocket connection")
-	conn.ws.WriteMessage(gorillaws.TextMessage, []byte(msg))
-	conn.ws.Close()
+	conn.ws.Close(websocket.StatusCode(400), msg)
 	conn.ws = nil
-	conn.txBuffer.Insert("we do this to make txBuffer.Get() return")
-}
-
-func (con *Connection) logConnection(v ...string) {
-	a := ""
-
-	for _, s := range v {
-		a += s + ", "
-	}
-	log.Println(a, "on connection ", con.ID, ", for color ", con.forColor.String())
 }

go.mod

@@ -1,46 +1,46 @@
 module mchess_server
 
-go 1.22
+go 1.21.1
 
 require (
-	github.com/gin-gonic/gin v1.10.0
+	github.com/gin-gonic/gin v1.9.1
 	github.com/google/uuid v1.6.0
-	github.com/samber/lo v1.41.0
-	github.com/stretchr/testify v1.9.0
+	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
 )
 
-require github.com/benbjohnson/clock v1.3.5 // indirect
-
 require (
-	github.com/bytedance/sonic v1.11.9 // 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/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/davecgh/go-spew v1.1.1 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.4 // 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 v10.22.0 // indirect
-	github.com/goccy/go-json v0.10.3 // indirect
-	github.com/gorilla/websocket v1.5.3
+	github.com/go-playground/validator/v10 v10.17.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.6 // 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/pelletier/go-toml/v2 v2.2.2 // 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/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
-	go.uber.org/ratelimit v0.3.1
-	golang.org/x/arch v0.8.0 // indirect
-	golang.org/x/crypto v0.24.0 // indirect
-	golang.org/x/exp v0.0.0-20240613232115-7f521ea00fb8 // indirect
-	golang.org/x/net v0.26.0 // indirect
-	golang.org/x/sys v0.21.0 // indirect
-	golang.org/x/text v0.16.0 // indirect
-	google.golang.org/protobuf v1.34.2 // indirect
+	golang.org/x/arch v0.7.0 // indirect
+	golang.org/x/crypto v0.19.0 // indirect
+	golang.org/x/exp v0.0.0-20240205201215-2c58cdc269a3 // indirect
+	golang.org/x/net v0.21.0 // indirect
+	golang.org/x/sys v0.17.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/protobuf v1.32.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,55 +1,69 @@
-github.com/benbjohnson/clock v1.3.5 h1:VvXlSJBzZpA/zum6Sj74hxwYI2DIxRWuNIoXAzHZz5o=
-github.com/benbjohnson/clock v1.3.5/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 v1.11.9 h1:LFHENlIY/SLzDWverzdOvgMztTxcfcF+cqNsz9pK5zg=
-github.com/bytedance/sonic v1.11.9/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/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=
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 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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-github.com/gabriel-vasile/mimetype v1.4.4 h1:QjV6pZ7/XZ7ryI2KuyeEDE8wnh7fHP9YnQy+R0LnH8I=
-github.com/gabriel-vasile/mimetype v1.4.4/go.mod h1:JwLei5XPtWdGiMFB5Pjle1oEeoSeEuJfJE+TtfvdB/s=
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-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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 github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
 github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
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 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
-github.com/go-playground/validator/v10 v10.20.0 h1:K9ISHbSaI0lyB2eWMPJo+kOS/FBExVwjEviJTixqxL8=
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 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
-github.com/klauspost/cpuid/v2 v2.2.7 h1:ZWSB3igEs+d0qvnxR/ZBzXVmxkgt8DdzP6m9pfuVLDM=
-github.com/klauspost/cpuid/v2 v2.2.7/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
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+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
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+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+nhooyr.io/websocket v1.8.10 h1:mv4p+MnGrLDcPlBoWsvPP7XCzTYMXP9F9eIGoKbgx7Q=
+nhooyr.io/websocket v1.8.10/go.mod h1:rN9OFWIUwuxg4fR5tELlYC04bXYowCP9GX47ivo2l+c=
 nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

lobbies/usher.go

@@ -1,38 +0,0 @@
-package lobbies
-
-import (
-	"mchess_server/chess"
-	"mchess_server/utils"
-)
-
-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 {
-	return GetLobbyRegistry().GetLobbyForPlayer()
-}
-
-func (u *Usher) CreateNewPrivateLobby(player *chess.Player) *Lobby {
-	return GetLobbyRegistry().CreateNewPrivateLobby()
-}
-
-func (u *Usher) FindExistingPrivateLobby(p utils.Passphrase) *Lobby {
-	return GetLobbyRegistry().GetLobbyByPassphrase(p)
-}
-
-func (u *Usher) AddPlayerToLobbyAndStartGameIfFull(player *chess.Player, lobby *Lobby) {
-	lobby.AddPlayerAndStartGameIfFull(player)
-}

lobby_registry/lobby.go

@@ -1,4 +1,4 @@
-package lobbies
+package lobby_registry
 
 import (
 	"mchess_server/chess"
@@ -8,15 +8,17 @@ import (
 )
 
 type Lobby struct {
-	Uuid       uuid.UUID
-	Game       *chess.Game
-	Passphrase utils.Passphrase
+	Uuid         uuid.UUID
+	Game         *chess.Game
+	PlayerJoined chan bool
+	Passphrase   utils.Passphrase
 }
 
 func NewEmptyLobbyWithUUID(uuid uuid.UUID) *Lobby {
 	return &Lobby{
-		Uuid: uuid,
-		Game: chess.NewGame(),
+		Uuid:         uuid,
+		Game:         chess.NewGame(),
+		PlayerJoined: make(chan bool),
 	}
 }
 
@@ -29,16 +31,12 @@ func newEmptyLobbyWithPassphrase() *Lobby {
 
 func (l *Lobby) AddPlayerAndStartGameIfFull(player *chess.Player) {
 	l.Game.AddPlayersToGame(player)
-	if l.ContainsTwoPlayers() {
+	if l.IsFull() {
 		l.Game.StartHandling()
 	}
 }
 
-func (w *Lobby) AreBothPlayersConnected() bool {
-	return w.Game.AreBothPlayersConnected()
-}
-
-func (w *Lobby) ContainsTwoPlayers() bool {
+func (w *Lobby) IsFull() bool {
 	return len(w.Game.GetPlayers()) == 2
 }
 

lobby_registry/registry.go

@@ -1,4 +1,4 @@
-package lobbies
+package lobby_registry
 
 import (
 	"mchess_server/utils"
@@ -7,7 +7,7 @@ import (
 )
 
 type LobbyRegistry struct {
-	lobbies map[utils.Passphrase]*Lobby
+	lobbies map[uuid.UUID]*Lobby
 }
 
 var instance *LobbyRegistry
@@ -21,7 +21,7 @@ func GetLobbyRegistry() *LobbyRegistry {
 }
 
 func newLobbyRegistry() *LobbyRegistry {
-	return &LobbyRegistry{lobbies: make(map[utils.Passphrase]*Lobby)}
+	return &LobbyRegistry{lobbies: make(map[uuid.UUID]*Lobby)}
 }
 
 func (r *LobbyRegistry) CreateNewPrivateLobby() *Lobby {
@@ -32,7 +32,7 @@ func (r *LobbyRegistry) CreateNewPrivateLobby() *Lobby {
 
 func (r *LobbyRegistry) GetLobbyForPlayer() *Lobby {
 	for _, lobby := range r.lobbies {
-		if !lobby.ContainsTwoPlayers() {
+		if !lobby.IsFull() {
 			return lobby
 		}
 	}
@@ -42,6 +42,10 @@ func (r *LobbyRegistry) GetLobbyForPlayer() *Lobby {
 	return newLobby
 }
 
+func (r *LobbyRegistry) GetLobbyByUUID(uuid uuid.UUID) *Lobby {
+	return r.lobbies[uuid]
+}
+
 func (r *LobbyRegistry) GetLobbyByPassphrase(p utils.Passphrase) *Lobby {
 	for _, lobby := range r.lobbies {
 		if lobby.Passphrase == p {
@@ -52,6 +56,6 @@ func (r *LobbyRegistry) GetLobbyByPassphrase(p utils.Passphrase) *Lobby {
 }
 
 func (r *LobbyRegistry) addNewLobby(lobby *Lobby) uuid.UUID {
-	r.lobbies[lobby.Passphrase] = lobby
+	r.lobbies[lobby.Uuid] = lobby
 	return lobby.Uuid
 }

main.go

@@ -1,19 +1,30 @@
 package main
 
 import (
+	"context"
+	"encoding/json"
 	"flag"
+	"fmt"
 	"log"
-	"mchess_server/api/handler"
+	"mchess_server/api"
+	"mchess_server/chess"
+	lobbies "mchess_server/lobby_registry"
+	"mchess_server/usher"
+	"mchess_server/utils"
+	"net/http"
+	"sync"
 
 	"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() {
-	log.SetFlags(log.LstdFlags | log.Lmicroseconds)
 	var debugMode bool
 
 	debugModeLong := flag.Bool("debug", false, "activates debug mode")
@@ -24,13 +35,10 @@ func main() {
 	}
 
 	router := gin.Default()
-	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)
+	router.GET("/api/random", registerForRandomGame)
+	router.GET("/api/hostPrivate", hostPrivateGame)
+	router.POST("/api/joinPrivate", joinPrivateGame)
+	router.GET("/api/ws", registerWebSocketConnection)
 
 	if debugMode {
 		log.Println("Starting service WITHOUT TLS")
@@ -42,3 +50,139 @@ 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)
+}

types/common.go

@@ -16,10 +16,6 @@ func (c ChessColor) Opposite() ChessColor {
 	}
 }
 
-func (c ChessColor) String() string {
-	return string(c)
-}
-
 type AdditionalState struct {
 	BlackKingMoved  bool
 	WhiteKingMoved  bool

usher/usher.go

@@ -0,0 +1,45 @@
+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

@@ -2,56 +2,101 @@ package utils
 
 import (
 	"strings"
-	"unicode"
+
+	"github.com/tjarratt/babble"
 )
 
 type Passphrase string
 
 func NewPassphrase() Passphrase {
 	var phrase string
+	var retries int
 	var word string
-	var words = 3
-
+	var words = 2
 	//TODO make sure passphrases are unique
 	for words > 0 {
-		word = getCleanWord()
-		phrase = phrase + word + " "
+		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
+		}
 		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

@@ -1,36 +0,0 @@
-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)
-}