feat(quality): enhance logger

Warnings are flushed after the generation to help the user to find
issues.
Colors are better defined.

internal/logger/logger.go

@@ -4,6 +4,7 @@ package logger
 import (
 	"fmt"
 	"os"
+	"sync"
 )
 
 // Icon is a unicode icon
@@ -27,6 +28,18 @@ const (
 
 const reset = "\033[0m"
 
+const (
+	ColorGreen   = "\033[38;5;34m"
+	ColorRed     = "\033[38;5;196m"
+	ColorOrange  = "\033[38;5;214m"
+	ColorWarning = "\033[38;5;214m"
+)
+
+var (
+	warnings []string
+	mu       sync.Mutex
+)
+
 // Print prints a message without icon.
 func Print(msg ...any) {
 	fmt.Print(msg...)
@@ -49,38 +62,38 @@ func Infof(format string, msg ...any) {
 
 // Warn prints a warning message.
 func Warn(msg ...any) {
-	orange := "\033[38;5;214m"
-	message(orange, IconWarning, msg...)
+	mu.Lock()
+	defer mu.Unlock()
+	warning := fmt.Sprint(msg...)
+	warnings = append(warnings, warning)
 }
 
 // Warnf prints a formatted warning message.
 func Warnf(format string, msg ...any) {
-	orange := "\033[38;5;214m"
-	message(orange, IconWarning, fmt.Sprintf(format, msg...))
+	mu.Lock()
+	defer mu.Unlock()
+	warning := fmt.Sprintf(format, msg...)
+	warnings = append(warnings, warning)
 }
 
 // Success prints a success message.
 func Success(msg ...any) {
-	green := "\033[38;5;34m"
-	message(green, IconSuccess, msg...)
+	message(ColorGreen, IconSuccess, msg...)
 }
 
 // Successf prints a formatted success message.
 func Successf(format string, msg ...any) {
-	green := "\033[38;5;34m"
-	message(green, IconSuccess, fmt.Sprintf(format, msg...))
+	message(ColorGreen, IconSuccess, fmt.Sprintf(format, msg...))
 }
 
 // Failure prints a failure message.
 func Failure(msg ...any) {
-	red := "\033[38;5;196m"
-	message(red, IconFailure, msg...)
+	message(ColorRed, IconFailure, msg...)
 }
 
 // Failuref prints a formatted failure message.
 func Failuref(format string, msg ...any) {
-	red := "\033[38;5;196m"
-	message(red, IconFailure, fmt.Sprintf(format, msg...))
+	message(ColorRed, IconFailure, fmt.Sprintf(format, msg...))
 }
 
 // Log prints a message with a custom icon.
@@ -106,12 +119,26 @@ func fatalf(red string, icon Icon, format string, msg ...any) {
 
 // Fatal prints a fatal error message and exits with code 1.
 func Fatal(msg ...any) {
-	red := "\033[38;5;196m"
-	fatal(red, IconFailure, msg...)
+	fatal(ColorRed, IconFailure, msg...)
 }
 
 // Fatalf prints a fatal error message with formatting and exits with code 1.
 func Fatalf(format string, msg ...any) {
-	red := "\033[38;5;196m"
-	fatalf(red, IconFailure, format, msg...)
+	fatalf(ColorRed, IconFailure, format, msg...)
+}
+
+// FlushWarnings prints all collected warnings at the end of the conversion.
+func FlushWarnings() {
+	mu.Lock()
+	defer mu.Unlock()
+	if len(warnings) > 0 {
+		fmt.Println()
+		fmt.Print(ColorWarning, IconWarning, " The following issues may need attention:", reset)
+		fmt.Println()
+		for _, warning := range warnings {
+			fmt.Println("  •", warning)
+		}
+		fmt.Println()
+		warnings = nil
+	}
 }

internal/logger/logger_test.go

@@ -77,3 +77,25 @@ func TestLog(t *testing.T) {
 	}()
 	Log(IconInfo, "test log")
 }
+
+func TestWarningsCollection(t *testing.T) {
+	// Clear any existing warnings
+	warnings = nil
+
+	// Add some warnings
+	Warn("test warning 1")
+	Warnf("test warning 2: %s", "value")
+
+	// Check that warnings were collected
+	if len(warnings) != 2 {
+		t.Errorf("expected 2 warnings, got %d", len(warnings))
+	}
+
+	// Check the content of warnings
+	if warnings[0] != "test warning 1" {
+		t.Errorf("expected 'test warning 1', got '%s'", warnings[0])
+	}
+	if warnings[1] != "test warning 2: value" {
+		t.Errorf("expected 'test warning 2: value', got '%s'", warnings[1])
+	}
+}