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peertube/server/typings/utils.ts

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2019-08-15 05:53:26 -04:00
export type FunctionPropertyNames<T> = {
[K in keyof T]: T[K] extends Function ? K : never
}[keyof T]
export type FunctionProperties<T> = Pick<T, FunctionPropertyNames<T>>
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export type PickWith<T, KT extends keyof T, V> = {
[P in KT]: T[P] extends V ? V : never
}
export type PickWithOpt<T, KT extends keyof T, V> = {
[P in KT]?: T[P] extends V ? V : never
}
// https://github.com/krzkaczor/ts-essentials Rocks!
export type DeepPartial<T> = {
[P in keyof T]?: T[P] extends Array<infer U>
? Array<DeepPartial<U>>
: T[P] extends ReadonlyArray<infer U>
? ReadonlyArray<DeepPartial<U>>
: DeepPartial<T[P]>
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}