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Lang: Remove some duplication in types (#6712)

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zubiden 2026-02-22 23:43:50 +01:00 committed by Alexander Zinchuk
parent 1c16982b61
commit b5903e9594
1 changed files with 33 additions and 25 deletions
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58
src/util/localization/types.ts
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@ -47,6 +47,27 @@ export type AdvancedLangFnOptions = AdvancedLangFnOptionsRegular | AdvancedLangF
type LangPairWithNodes = LangPairWithVariables<TeactNode | undefined>;
type LangPairPluralWithNodes = LangPairPluralWithVariables<TeactNode | undefined>;
// Helpers for merged overloads
type AllKeysOf<T> = T extends any ? keyof T : never;
type AnyLangOptions = LangFnOptions | AdvancedLangFnOptions;
type AnyLangPluralOptions = LangFnOptionsWithPlural | AdvancedLangFnOptionsWithPlural;
// Maps unknown option keys to `never`, catching typos even through generics
type StrictLangOptions<O> = O & Record<Exclude<keyof O & string, AllKeysOf<AnyLangOptions>>, never>;
type LangFnReturnType<O> = O extends AdvancedLangFnOptions ? TeactNode : string;
type PrepVariablesType<K extends RegularLangKeyWithVariables, O> =
O extends AdvancedLangFnOptions
? LangPairWithNodes[K]
: LangPairWithVariables[K];
type PrepPluralVariablesType<K extends PluralLangKeyWithVariables, O> =
O extends AdvancedLangFnOptions
? LangPairPluralWithNodes[K]
: LangPairPluralWithVariables[K];
type RegularLangFnParametersWithoutVariables = {
key: RegularLangKey;
variables?: undefined;
@ -122,31 +143,18 @@ export type AdvancedLangFnParameters =
export type LangFnParameters = RegularLangFnParameters | AdvancedLangFnParameters;
export type LangFn = {
<K extends RegularLangKey = RegularLangKey>(
key: K, variables?: undefined, options?: LangFnOptions,
): string;
<K extends PluralLangKey = PluralLangKey>(
key: K, variables: undefined, options: LangFnOptionsWithPlural,
): string;
<K extends RegularLangKeyWithVariables = RegularLangKeyWithVariables>(
key: K, variables: LangPairWithVariables[K], options?: LangFnOptions,
): string;
<K extends PluralLangKeyWithVariables = PluralLangKeyWithVariables>(
key: K, variables: LangPairPluralWithVariables[K], options: LangFnOptionsWithPlural,
): string;
<K extends RegularLangKey = RegularLangKey>(
key: K, variables?: undefined, options?: AdvancedLangFnOptions,
): TeactNode;
<K extends PluralLangKey = PluralLangKey>(
key: K, variables: undefined, options: AdvancedLangFnOptionsWithPlural,
): TeactNode;
<K extends RegularLangKeyWithVariables = RegularLangKeyWithVariables>(
key: K, variables: LangPairWithVariables<TeactNode | undefined>[K], options: AdvancedLangFnOptions,
): TeactNode;
<K extends PluralLangKeyWithVariables = PluralLangKeyWithVariables>(
key: K, variables: LangPairPluralWithVariables<TeactNode | undefined>[K], options: AdvancedLangFnOptionsWithPlural,
): TeactNode;
<K extends PluralLangKeyWithVariables, O extends AnyLangPluralOptions>(
key: K, variables: PrepPluralVariablesType<K, O>, options: StrictLangOptions<O>,
): LangFnReturnType<O>;
<K extends RegularLangKeyWithVariables, O extends AnyLangOptions = LangFnOptionsRegular>(
key: K, variables: PrepVariablesType<K, O>, options?: StrictLangOptions<O>,
): LangFnReturnType<O>;
<K extends PluralLangKey, O extends AnyLangPluralOptions>(
key: K, variables: undefined, options: StrictLangOptions<O>,
): LangFnReturnType<O>;
<K extends RegularLangKey, O extends AnyLangOptions = LangFnOptionsRegular>(
key: K, variables?: undefined, options?: StrictLangOptions<O>,
): LangFnReturnType<O>;
with: (params: LangFnParameters) => TeactNode;
withRegular: (params: RegularLangFnParameters) => string;