interface Action {
payload?: T
type: string;
}
interface initInterface {
count: number;
message: string;
asyncMethod<T,U>(input: Promise<T>): Promise<Action<U>>;
syncMethod<T,U>(action:Action<T>): Action<U>;
}
interface newInitInterface {
asyncMethod<T,U>(input: Promise<T>) : Promise<Action<U>>;
transformAsyncMethod<T,U> (input: T) : Action<U>;
}
/**
- 抽离initInterface中属于函数的key值
*/
type RemoveNonFunctionProps = {
[K in keyof T]: T[K] extends Function ? K : never
}[keyof T];
type FunctionProps = RemoveNonFunctionProps
/**
- 根据抽离的函数key值抽离出函数
*/
type PickFunction = Pick<T, RemoveNonFunctionProps>;
type iFunctionInterface = PickFunction;
/**
-
进行转换的规则定制
-
infer可以取到内部值
*/
type transformMethodTo = T extends (
input: Promise<infer U>
) => Promise<Action>
? (input: U) => Action<S>
: T extends (action: Action<infer U>) => Action<infer S>
? (action: U) => Action<S>
: never;
/**
- 转换接口
*/
type toNewInitInterface = {
[K in keyof T]: transformMethodTo<T[K]>
}
type connect = toNewInitInterface
