Autoincrement.ts

export class Autoincrement {
	value!: number

	constructor(readonly initialValue = 0) {
		this.set(initialValue)
	}

	set = (newValue: number) => {
		this.value = newValue
	}

	next = () => this.value++

	// reset = () => {
	// 	this.value = this.initialValue
	// }

	// exclude = (maxExistingId: number) => {
	// 	if (maxExistingId > this.value)
	// 		this.set(maxExistingId)
	// }
}

export class AutoincrementMap<Key> {
	map = new Map<Key, Autoincrement>()

	constructor(readonly initialValue = 0) {}

	nextFor(key: Key) {
		if (!this.map.has(key))
			this.map.set(key, new Autoincrement(this.initialValue))

		// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
		const itemAutoincrement = this.map.get(key)!
		return itemAutoincrement.next()
	}
}