mathiasandClaude Sonnet 5.5
8e4872d2e7
sv and auto; an empty form value is sv, anything else is refused. LanguageFrom defaults to sv so a caller that sets nothing behaves as before. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
48 lines
1.6 KiB
Go
48 lines
1.6 KiB
Go
package domain
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import "context"
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// Language is the spoken language an upload is transcribed as. It is chosen by the user on
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// the upload form and reaches the engines as one request field, so it is a closed set,
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// never free text (tapir#61).
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type Language string
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const (
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// LangSwedish sends language=sv: the Swedish engines' own language, and what every
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// upload was transcribed as before the choice existed.
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LangSwedish Language = "sv"
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// LangAuto sends no language, so the engine detects it. It is what "Other" on the form
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// means: the Swedish-only engines are not used for it.
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LangAuto Language = "auto"
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)
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// ParseLanguage reads a form value. An empty value is Swedish (a client that predates the
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// field); anything that is not exactly a known value is refused rather than normalised.
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func ParseLanguage(s string) (Language, bool) {
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switch Language(s) {
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case "", LangSwedish:
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return LangSwedish, true
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case LangAuto:
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return LangAuto, true
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}
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return "", false
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}
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type languageKey struct{}
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// WithLanguage returns a context that carries the language of the job it serves. The
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// Transcriber interface does not change: engines read it with LanguageFrom, the same way
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// they read the progress Reporter (ADR-035).
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func WithLanguage(ctx context.Context, l Language) context.Context {
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return context.WithValue(ctx, languageKey{}, l)
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}
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// LanguageFrom returns the language carried by ctx, or Swedish when it carries none, so a
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// caller that sets nothing behaves as it always did.
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func LanguageFrom(ctx context.Context) Language {
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if l, ok := ctx.Value(languageKey{}).(Language); ok && l != "" {
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return l
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}
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return LangSwedish
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}
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