35 lines
750 B
Go
35 lines
750 B
Go
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package lang
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import "fmt"
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// Supported language codes
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const (
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English = "en"
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Spanish = "es"
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)
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// All returns all supported language codes
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func All() []string {
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return []string{English, Spanish}
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}
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// IsValid checks if a language code is supported
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func IsValid(lang string) bool {
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return lang == English || lang == Spanish
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}
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// Validate returns an error if the language code is unsupported.
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// It provides helpful error messages showing all supported languages.
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//
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// Example:
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//
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// if err := lang.Validate("fr"); err != nil {
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// // err: unsupported language: fr (supported: [en es])
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// }
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func Validate(lang string) error {
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if !IsValid(lang) {
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return fmt.Errorf("unsupported language: %s (supported: %v)", lang, All())
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}
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return nil
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}
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