add modules

internal/modules/formatter/interface.go

@@ -0,0 +1,6 @@
+package formatter
+
+type IFormatter interface {
+	FormatText(text string) string
+	FormatString(text string) string
+}

internal/modules/formatter/service.go

@@ -0,0 +1,50 @@
+package formatter
+
+import (
+	"bufio"
+	"strings"
+)
+
+type service struct{}
+
+func NewFormatter() IFormatter {
+	return &service{}
+}
+
+func (s *service) FormatText(text string) string {
+	scanner := bufio.NewScanner(strings.NewReader(text))
+
+	scanner.Split(bufio.ScanLines)
+
+	lines := []string{}
+	for scanner.Scan() {
+		lines = append(lines, scanner.Text())
+	}
+
+	var res strings.Builder
+	for i, line := range lines {
+		l := strings.TrimSpace(line)
+		if strings.HasPrefix(l, "--") {
+			l = strings.Replace(l, "--", "—", 1)
+		}
+		if i == 0 && strings.HasPrefix(l, "—") {
+			res.WriteString("    ")
+		}
+		if i > 0 {
+			res.WriteString("\n")
+			if len(l) > 0 {
+				res.WriteString("    ")
+			}
+		}
+		res.WriteString(l)
+	}
+	return res.String()
+}
+
+func (s *service) FormatString(text string) string {
+	l := strings.TrimSpace(text)
+	if strings.HasPrefix(l, "--") {
+		l = strings.Replace(l, "--", "—", 1)
+	}
+	return l
+}

internal/modules/formatter/service_test.go

@@ -0,0 +1,41 @@
+package formatter
+
+import "testing"
+
+func Test_service_FormatText(t *testing.T) {
+	tests := []struct {
+		name string
+		text string
+		want string
+	}{
+		{
+			name: "Простой текст",
+			text: "Привет",
+			want: "Привет",
+		},
+		{
+			name: "Текст с двумя абзацами",
+			text: "Привет\nМир",
+			want: "Привет\n    Мир",
+		},
+		{
+			name: "Прямая речь",
+			text: "— Привет",
+			want: "    — Привет",
+		},
+		{
+			name: "Прямая речь через 2 минуса",
+			text: "-- Привет",
+			want: "    — Привет",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var s service
+			got := s.FormatText(tt.text)
+			if got != tt.want {
+				t.Errorf("FormatText() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}