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fix: strict type definitions for RouteParams #33

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fix: strict type definitions for RouteParams #33

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29 changes: 17 additions & 12 deletions index.d.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -8,21 +8,26 @@ export function parse(route: RegExp): {
pattern: RegExp;
}

type KeyRecord<T extends string> =
T extends `${infer P}?` // :id?
? { [K in P]?: string | undefined }
: T extends `${infer P}.${string}` // :id.ext
? { [K in P]: string }
: { [K in T]: string };

export type RouteParams<T extends string> =
T extends `${infer Prev}/*/${infer Rest}`
? RouteParams<Prev> & { wild: string } & RouteParams<Rest>
: T extends `${string}:${infer P}?/${infer Rest}`
? { [K in P]?: string } & RouteParams<Rest>
: T extends `${string}:${infer P}/${infer Rest}`
? { [K in P]: string } & RouteParams<Rest>
: T extends `${string}:${infer P}?`
? { [K in P]?: string }
: T extends `${string}:${infer P}`
? { [K in P]: string }
: T extends `${string}*`
? RouteParams<Prev> & { wild: string } & RouteParams<`/${Rest}`>
: T extends `:${infer Rest}`
? RouteParams<`/:${Rest}`>
: T extends `${string}/:${infer P}/${infer Rest}`
? KeyRecord<P> & RouteParams<`/${Rest}`>
: T extends `${string}/:${infer P}`
? KeyRecord<P>
: T extends `${string}/*`
? { "*": string }
: T extends `${string}*?`
? { "*"?: string }
: T extends `${string}/*?`
? { "*"?: string | undefined }
: {};

export function inject<T extends string>(route: T, values: RouteParams<T>): string;