importly/s/aspects/utilities/read-package-lock-json.ts

importly generates import maps

import {LockDetails, PackageLock, PackageOrder} from "../../types.js"

export function readPackageLockJson({json, dev}: {
		json: PackageLock
		dev: boolean
	}): PackageOrder[] {

	type Filter = ([]: [string, LockDetails]) => boolean

	const filterForActualDependencies: Filter = ([directory]) => !!directory

	const filterOutOptionals: Filter = ([,{optional}]) => !optional

	const filterDevDependencies: Filter =
		dev
			? () => true
			: ([,details]) => !details.dev

	return Object.entries(json.packages)
		.filter(filterForActualDependencies)
		.filter(filterOutOptionals)
		.filter(filterDevDependencies)
		.map(([directory, {version}]) => {
			const parents = directory
				.split(/\/?node_modules\/?/)
				.filter(s => s.length > 0)
			const label = parents.pop()
			return {
				label,
				version,
				parents,
			}
		})
}