package main

import (
	"encoding/json"
	"io"
	"io/ioutil"
	"os"
)

type SongsFile struct {
	Songs []*SongEntry
}

type SongEntry struct {
	Week   int
	Title  string
	Artist string
	URL    string
	Sync   bool
}

func loadDb() (SongsFile, error) {

	var v SongsFile
	f, err := os.Open("songs.json")
	if err != nil {
		return v, err
	}
	defer f.Close()

	if err != nil {
		return v, err
	}
	dec := json.NewDecoder(f)
	dec.UseNumber()
	for {
		if err := dec.Decode(&v); err == io.EOF {
			break
		} else if err != nil {
			return v, err
		}
	}
	return v, nil
}

func saveDb(v SongsFile) error {
	jsonValue, err := json.Marshal(v)
	if err != nil {
		return err
	}
	err = ioutil.WriteFile("songs.json", jsonValue, 0644)
	return err
}