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daxios.ts
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daxios.ts
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type SnakeToKebabCase<T extends string> = T extends `${infer A}_${infer B}`
? `${A}-${SnakeToKebabCase<B>}`
: T;
type KebabToSnakeCase<T extends string> = T extends `${infer A}-${infer B}`
? `${A}_${KebabToSnakeCase<B>}`
: T;
type RemoveFirstUnderscore<T extends string> = T extends `_${infer S}` ? S : T;
type UrlToMethodName<
GetPostDelete extends string,
Pretty extends string
> = Pretty extends `${infer Prefix}/${infer S}`
? [Prefix, `${GetPostDelete}_${KebabToSnakeCase<S>}`]
: [Pretty, GetPostDelete];
type MethodNameToUrl<GetPostDelete extends string, App> = {
[Prefix in keyof App]: Prefix extends string
? {
[M in keyof App[Prefix]]: M extends `${GetPostDelete}${infer MethodSnakeCase}`
? App[Prefix][M] extends () => any
? RemoveFirstUnderscore<MethodSnakeCase> extends ''
? `${Prefix}`
: `${Prefix}/${SnakeToKebabCase<
RemoveFirstUnderscore<MethodSnakeCase>
>}`
: never
: never;
}[keyof App[Prefix]]
: never;
}[keyof App];
type MagicReturnType<
App,
GetPostDelete extends string,
PrettyUrl extends string
> = UrlToMethodName<GetPostDelete, PrettyUrl>[0] extends keyof App
? UrlToMethodName<
GetPostDelete,
PrettyUrl
>[1] extends keyof App[UrlToMethodName<GetPostDelete, PrettyUrl>[0]]
? App[UrlToMethodName<GetPostDelete, PrettyUrl>[0]][UrlToMethodName<
GetPostDelete,
PrettyUrl
>[1]] extends () => infer ReturnType
? ReturnType
: never
: never
: never;
export type Daxios<App> = {
get<Url extends MethodNameToUrl<'GET', App>>(
url: Url
): MagicReturnType<App, 'GET', Url>;
post<Url extends MethodNameToUrl<'POST', App>>(
url: Url
): MagicReturnType<App, 'POST', Url>;
delete<Url extends MethodNameToUrl<'DELETE', App>>(
url: Url
): MagicReturnType<App, 'DELETE', Url>;
};