All files / src/hooks/slot slot.ts

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import { hub } from '../hub'
 
import type { Rune } from '../../RuneHub'
import { Slot } from '../../RuneHub'
 
/**
 * Gets or creates a slot for a rune.
 * If the slot doesn't exist, creates it using the rune's custom cast function or default constructor.
 * @template T - The rune function type
 * @param rune - The rune to get or create a slot for
 * @returns The slot managing the rune's state
 * @example
 * ```ts
 * const count = () => 5
 *
 * const countSlot = slot(count)
 * countSlot.get() // 5
 * ```
 */
export function slot<T extends Rune> (rune: T): Slot<ReturnType<T>> {
  const currentHub = hub()
 
  const slot = currentHub.slots.get(rune)
 
  if (!slot) {
    return new Slot(rune, currentHub, false)
  }
 
  return slot as Slot<ReturnType<T>>
}