// @ts-check

import {isDeepStrictEqual} from 'node:util'

/**

* ObjectMap extends Map, but determines key equality using Node.js’ `util.isDeepStrictEqual` rather than using [SameValueZero](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map#key_equality). This makes using objects as keys a bit simpler.

*/

export default class ObjectMap extends Map {

#data

constructor(iterable = []) {

super()

this.#data = iterable

}

clear() {

this.#data = []

}

delete(key) {

if (!this.has(key)) {

return false

}

this.#data = this.#data.filter(([existingKey]) => !isDeepStrictEqual(existingKey, key))

return true

}

entries() {

return this.#data[Symbol.iterator]()

}

forEach(cb) {

for (const [key, value] of this.#data) {

cb(value, key, this.#data)

}

}

get(key) {

return this.#data.find(([existingKey]) => isDeepStrictEqual(existingKey, key))?.[1]

}

has(key) {

return this.#data.findIndex(([existingKey]) => isDeepStrictEqual(existingKey, key)) !== -1

}

keys() {

return this.#data.map(([key]) => key)[Symbol.iterator]()

}

set(key, value) {

this.delete(key)

this.#data.push([key, value])

return this

}

values() {

return this.#data.map(([, value]) => value)[Symbol.iterator]()

}

}