Improve interface mapper logic to recursively pick all properties

eddeee888 commented 3 months ago

We were previously only pick the properties of a mapper interface declaration.

However, we need to recursively pick all the properties to have the right fields, otherwise we'd miss the properties of the base interfaces.

For example:

interface BaseNode {
  id: string
}

interface NodeIndentifier {
  fullName: string;
}

interface Pet extends BaseNode, NodeIndentifier {
  age: number;
}

export interface CatMapper extends Pet {
  scratches: boolean;
}

export interface DogMapper extends Pet {
  likesToDig: boolean;
}

Then, the collected node properties would look like this:

Mapper	Previous	Now
`CatMapper`	`{ scratches: boolean }`	`{ id: string; fullName: string; age: number; scratches: boolean}`
`DogMapper`	`{ likesToDig: boolean }`	`{ id: string; fullName: string; age: number; likesToDig: boolean}`

Detecting mapper properties correctly allows downstream field resolver checkers and generation to work correctly. Issue: https://github.com/eddeee888/graphql-code-generator-plugins/issues/223