Typescript Examples

schema-to-type.ts

const schema = {
  uploadDocToValt: { type: 'string' },
  foo: { type: 'boolean' },
  inner: { type: 'object', object: {
      test: {type: 'number'},
      innerinner: {type: 'object', object: { 
            woweee: {type: 'string[]'},
      }}
  }}
} as const;

type ObjectType = {type: 'object', object: TypedObject};
type Type = {type: 'string' | 'boolean' | 'number' | 'string[]'};

type TypedObject = {[key: string] : ObjectType | Type}

type SchemaInstance<T extends TypedObject> = {
    [Property in keyof T]: 
        T[Property] extends ObjectType ? SchemaInstance<T[Property]['object']> : 
        LiteralToType<T[Property]>
};

type LiteralToType<T extends ObjectType | Type> = 
    T['type'] extends 'string' ? string: 
    T['type'] extends 'boolean' ? boolean :
    T['type'] extends 'number' ? number :
    T['type'] extends 'string[]' ? string[] :
    never;


declare const x: SchemaInstance<typeof schema>;


x.inner.innerinner.woweee // string[]