winterspec/dist/types/util.d.ts

Write Winter-CG compatible routes with filesystem routing and tons of features

/**
 * This just pulls the "`I`" from a `Record<I, any>`
 *
 * Had to create this utility since `keyof Record<I, any>` doesn't seem to give I :/
 */
export type InferRecordKey<R extends Record<any, any>> = R extends Record<infer K, any> ? K : never;
/**
 * Executes an "array map" function on a tuple through a record
 *
 * For example:
 *
 * ```ts
 * Map = { [name in "arthur"|"jane"|"john"]: `hi ${name}!` }
 * Arr = [ "jane", "arthur" ]
 *
 * ->
 *
 *  [ "hi jane!", "hi arthur!" ]
 * ```
 */
export type MapArray<Map extends {
    [index: string | number | symbol]: any;
}, Arr extends readonly (keyof Map)[]> = Arr extends readonly [
    infer K extends keyof Map,
    ...infer Remaining extends (keyof Map)[]
] ? readonly [Map[K], ...MapArray<Map, Remaining>] : readonly [];