package context
import (
"context"
"os"
)
type contextKey string
const languageKey contextKey = "language"
// WithLanguage adds language to context
func WithLanguage(ctx context.Context, lang string) context.Context {
return context.WithValue(ctx, languageKey, lang)
}
// GetLanguage extracts language from context with fallback priority:
// 1. Context value (from explicit WithLanguage)
// 2. Environment variable GOREV_LANG
// 3. Default "tr"
func GetLanguage(ctx context.Context) string {
// Priority 1: Context value
if lang, ok := ctx.Value(languageKey).(string); ok && lang != "" {
return lang
}
// Priority 2: Environment variable
if lang := os.Getenv("GOREV_LANG"); lang != "" {
return lang
}
// Priority 3: Default
return "tr"
}
// ValidateLanguage ensures language is supported
func ValidateLanguage(lang string) string {
if lang == "en" || lang == "tr" {
return lang
}
return "tr" // Default fallback
}
