How to create generic of my generic type?-CodePudding

I have the following interfaces

interface CollectionResponse<T> {
    count: number;
    response: T
}

interface ApiResponse {
    id: string;
    isTheUserAdmin: boolean;
}

type generic = CollectionResponse<ApiResponse>;

const obj: generic = {
    count: 1,
    response: {
        id: '1',
        isTheUserAdmin: true,
    }
}

so now my generic type is implement dynamically the ApiResponse T.

But i have more nested structure for example when i git my API i get

{
count: 1,
response: {
        id: '1',
        isTheUserAdmin: true,
        data: {
           linkTypes: string[],
           folderTypesIds: number[]
        }
}
}

so when i create my first generic type generic = CollectionResponse<ApiResponse>;

i need to pass another generic for my data property that is actually inside my response generic

so i will have this interface

interface Data {
     linkTypes: string[],
     folderTypesIds: number[]
}

how can i include that in ApiReponse on the fly so at the end i will get type check for data also that is inside the response property

CodePudding user response：

What you are describing is a generic ApiResponse.

interface ApiResponse<T> {
    id: string;
    isTheUserAdmin: boolean;
    data: T;
}

Now you can do:

const myApiResponse = ApiResponse<{ hello: boolean }> {
    id: '1',
    isTheUserAdmin: true,
    data: {
        hello: true
    }
}

Now your Generic type needs to also be generic in order to pass that type through.

type Generic<T> = CollectionResponse<ApiResponse<T>>;

Now you pass your api response data type to that and it will end up in the right place.

interface MyDataType {
  linkTypes: string[]
  folderTypesIds: number[]
}

const obj: Generic<MyDataType> = {
    count: 1,
    response: {
        id: '1',
        isTheUserAdmin: true,
        data: {
           linkTypes: ['a', 'b', 'c'],
           folderTypesIds: [1, 2, 3],
        }
    }
}

See playground