complete game

.tool-versions

@@ -1,2 +1,2 @@
-go            1.20
+go            1.21.0
 golangci-lint 1.53

cmd/cli/main.go

@@ -1,4 +1,87 @@
+//nolint:forbidigo
 package main
 
+import (
+	"bufio"
+	"errors"
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/Crocmagnon/gordle/lib/gordle"
+)
+
+const (
+	defaultWordLength  = 5
+	defaultMaxAttempts = 5
+)
+
 func main() {
+	wordLength := flag.Int("l", defaultWordLength, "word length")
+	dictionary := flag.String("f", "", "dictionary file")
+	maxAttempts := flag.Int("m", defaultMaxAttempts, "maximum number of attempts")
+
+	flag.Parse()
+
+	if !validateInput(dictionary, wordLength, maxAttempts) {
+		os.Exit(1)
+	}
+
+	file, err := os.Open(*dictionary)
+	if err != nil {
+		fmt.Println(err.Error())
+		os.Exit(1)
+	}
+
+	word, err := gordle.PickWord(file, *wordLength)
+	if err != nil {
+		fmt.Println(err.Error())
+		os.Exit(1)
+	}
+
+	fmt.Printf("length %d ; you have %d attempts\n", *wordLength, *maxAttempts)
+
+	scanner := bufio.NewScanner(os.Stdin)
+	game := gordle.New(*maxAttempts, word)
+
+	for !game.Over() && scanner.Scan() {
+		var feedback gordle.FullFeedback
+
+		text := strings.ToUpper(scanner.Text())
+		feedback, err = game.TryWord(text)
+
+		fmt.Println(feedback)
+
+		switch {
+		case errors.Is(err, gordle.ErrGameWon):
+			fmt.Println("you won")
+		case errors.Is(err, gordle.ErrGameLost):
+			fmt.Println("you lost")
+		}
+	}
+}
+
+func validateInput(dictionary *string, wordLength *int, maxAttempts *int) bool {
+	ok := true //nolint:varnamelen
+
+	if *dictionary == "" {
+		fmt.Println("dictionary file is mandatory")
+
+		ok = false
+	}
+
+	if *wordLength <= 0 {
+		fmt.Println("word length must be positive")
+
+		ok = false
+	}
+
+	if *maxAttempts <= 0 {
+		fmt.Println("max attempts must be positive")
+
+		ok = false
+	}
+
+	return ok
 }

go.mod

@@ -1,3 +1,3 @@
 module github.com/Crocmagnon/gordle
 
-go 1.20
+go 1.21

lib/gordle/gordle.go

@@ -4,11 +4,40 @@ import (
 	"bufio"
 	"errors"
 	"fmt"
+	"io"
 	"math/rand"
 	"strings"
 )
 
-var ErrWordNotFound = errors.New("word not found with requested length")
+var (
+	ErrWordNotFound = errors.New("word not found with requested length")
+	ErrGameWon      = errors.New("won game")
+	ErrGameLost     = errors.New("game over")
+)
+
+type (
+	Feedback     string
+	FullFeedback []Feedback
+)
+
+func (ff FullFeedback) Wins() bool {
+	for _, f := range ff {
+		if f != FeedbackCorrect {
+			return false
+		}
+	}
+
+	return true
+}
+
+func (ff FullFeedback) String() string {
+	str := strings.Builder{}
+	for _, f := range ff {
+		str.WriteString(string(f))
+	}
+
+	return str.String()
+}
 
 const (
 	FeedbackNotInWord  = Feedback("N")
@@ -16,9 +45,43 @@ const (
 	FeedbackCorrect    = Feedback("C")
 )
 
-type Feedback string
+type Game struct {
+	maxAttempts    int
+	currentAttempt int
+	pickedWord     string
+	over           bool
+}
 
-func GetWord(reader *strings.Reader, wordLength int) (string, error) {
+func New(maxAttempts int, pickedWord string) *Game {
+	g := &Game{
+		maxAttempts: maxAttempts,
+		pickedWord:  pickedWord,
+	}
+
+	return g
+}
+
+func (g *Game) TryWord(word string) (FullFeedback, error) {
+	feedback := CheckWord(g.pickedWord, word)
+	if feedback.Wins() {
+		g.over = true
+		return feedback, ErrGameWon
+	}
+
+	g.currentAttempt++
+	if g.currentAttempt >= g.maxAttempts {
+		g.over = true
+		return feedback, ErrGameLost
+	}
+
+	return feedback, nil
+}
+
+func (g *Game) Over() bool {
+	return g.over
+}
+
+func PickWord(reader io.Reader, wordLength int) (string, error) {
 	var candidates []string
 
 	scanner := bufio.NewScanner(reader)
@@ -43,7 +106,7 @@ func GetWord(reader *strings.Reader, wordLength int) (string, error) {
 	return candidates[rnd], nil
 }
 
-func CheckWord(word, input string) []Feedback {
+func CheckWord(word, input string) FullFeedback {
 	wordRunes := []rune(word)
 	inputRunes := []rune(input)
 	res := []Feedback{}

lib/gordle/gordle_test.go

@@ -9,7 +9,7 @@ import (
 	"github.com/Crocmagnon/gordle/lib/gordle"
 )
 
-func TestGetWord(t *testing.T) {
+func TestPickWord(t *testing.T) {
 	t.Parallel()
 
 	tests := []struct {
@@ -26,7 +26,7 @@ func TestGetWord(t *testing.T) {
 		t.Run(test.want, func(t *testing.T) {
 			t.Parallel()
 			input := "test\ntests"
-			got, err := gordle.GetWord(strings.NewReader(input), test.length)
+			got, err := gordle.PickWord(strings.NewReader(input), test.length)
 			if !errors.Is(err, test.wantErr) {
 				t.Fatalf("got err %q want %q", test.wantErr, err)
 			}
@@ -38,26 +38,26 @@ func TestGetWord(t *testing.T) {
 	}
 }
 
-func TestTryWord(t *testing.T) {
+func TestCheckWord(t *testing.T) {
 	t.Parallel()
 
 	tests := []struct {
 		name  string
 		word  string
 		input string
-		want  []gordle.Feedback
+		want  gordle.FullFeedback
 	}{
-		{"empty", "", "", []gordle.Feedback{}},
-		{"missing input", "i", "", []gordle.Feedback{gordle.FeedbackNotInWord}},
-		{"correct single", "i", "i", []gordle.Feedback{gordle.FeedbackCorrect}},
-		{"incorrect place", "ab", "ba", []gordle.Feedback{gordle.FeedbackWrongPlace, gordle.FeedbackWrongPlace}},
+		{"empty", "", "", gordle.FullFeedback{}},
+		{"missing input", "i", "", gordle.FullFeedback{gordle.FeedbackNotInWord}},
+		{"correct single", "i", "i", gordle.FullFeedback{gordle.FeedbackCorrect}},
+		{"incorrect place", "ab", "ba", gordle.FullFeedback{gordle.FeedbackWrongPlace, gordle.FeedbackWrongPlace}},
 		{
 			"some correct some incorrect", "aba", "baa",
-			[]gordle.Feedback{gordle.FeedbackWrongPlace, gordle.FeedbackWrongPlace, gordle.FeedbackCorrect},
+			gordle.FullFeedback{gordle.FeedbackWrongPlace, gordle.FeedbackWrongPlace, gordle.FeedbackCorrect},
 		},
 		{
 			"complex", "testing", "xsesing",
-			[]gordle.Feedback{
+			gordle.FullFeedback{
 				gordle.FeedbackNotInWord,
 				gordle.FeedbackWrongPlace,
 				gordle.FeedbackWrongPlace,