package lib

import (
	"encoding/json"
	"fmt"
	"os"
)

type PackageJSON struct {
	Name            string            `json:"name"`
	Version         string            `json:"version"`
	Dependencies    map[string]string `json:"dependencies"`
	DevDependencies map[string]string `json:"devDependencies"`
}

func ParsePackageJson(path string) (PackageJSON, error) {
	f, err := os.Open(path)
	if os.IsNotExist(err) {
		return PackageJSON{}, os.ErrNotExist
	} else if err != nil {
		return PackageJSON{}, fmt.Errorf("could not read file: %v", err)
	}
	defer f.Close()

	var p PackageJSON
	if err := json.NewDecoder(f).Decode(&p); err != nil {
		return PackageJSON{}, fmt.Errorf("could not parse package.json file: %v", err)
	}

	return p, nil
}