( segment: string, locale?: Locale )
| 55 | } |
| 56 | |
| 57 | export function detectLanguageCode( |
| 58 | segment: string, |
| 59 | locale?: Locale |
| 60 | ): Array<Locale> | ['unknown'] | [SpecialCodeKey] { |
| 61 | for (const c of Object.keys(specialCode) as SpecialCodeKey[]) { |
| 62 | if (specialCode[c].test(segment)) { |
| 63 | return [c] |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | const languages = Object.keys(code).filter((lang) => |
| 68 | code[lang].test(segment) |
| 69 | ) as Locale[] |
| 70 | |
| 71 | if (languages.length === 0) { |
| 72 | return ['unknown'] |
| 73 | } |
| 74 | |
| 75 | if (locale) { |
| 76 | const index = languages.findIndex((lang) => lang === locale) |
| 77 | if (index !== -1) { |
| 78 | languages.splice(index, 1) |
| 79 | languages.unshift(locale) |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | return languages |
| 84 | } |
| 85 | |
| 86 | export function normalizeLocale(locale?: string): Locale | undefined { |
| 87 | if (locale) { |
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