shared/core-utils/common/types.ts

   1 /* eslint-disable @typescript-eslint/array-type */
   2
   3 export type FunctionPropertyNames<T> = {
   4   [K in keyof T]: T[K] extends Function ? K : never
   5 }[keyof T]
   6
   7 export type FunctionProperties<T> = Pick<T, FunctionPropertyNames<T>>
   8
   9 export type AttributesOnly<T> = {
  10   [K in keyof T]: T[K] extends Function ? never : T[K]
  11 }
  12
  13 export type PickWith<T, KT extends keyof T, V> = {
  14   [P in KT]: T[P] extends V ? V : never
  15 }
  16
  17 export type PickWithOpt<T, KT extends keyof T, V> = {
  18   [P in KT]?: T[P] extends V ? V : never
  19 }
  20
  21 // https://github.com/krzkaczor/ts-essentials Rocks!
  22 export type DeepPartial<T> = {
  23   [P in keyof T]?: T[P] extends Array<infer U>
  24     ? Array<DeepPartial<U>>
  25     : T[P] extends ReadonlyArray<infer U>
  26       ? ReadonlyArray<DeepPartial<U>>
  27       : DeepPartial<T[P]>
  28 }
  29
  30 type Primitive = string | Function | number | boolean | Symbol | undefined | null
  31 export type DeepOmitHelper<T, K extends keyof T> = {
  32   [P in K]: // extra level of indirection needed to trigger homomorhic behavior
  33   T[P] extends infer TP // distribute over unions
  34     ? TP extends Primitive
  35       ? TP // leave primitives and functions alone
  36       : TP extends any[]
  37         ? DeepOmitArray<TP, K> // Array special handling
  38         : DeepOmit<TP, K>
  39     : never
  40 }
  41 export type DeepOmit<T, K> = T extends Primitive ? T : DeepOmitHelper<T, Exclude<keyof T, K>>
  42
  43 export type DeepOmitArray<T extends any[], K> = {
  44   [P in keyof T]: DeepOmit<T[P], K>
  45 }