private void DeleteGroup()
{
foreach (var band in bands)
{
band.Print();
Console.WriteLine();
}
Console.WriteLine("Enter group name: ");
string groupName = Console.ReadLine();
if (!string.IsNullOrWhiteSpace(groupName))
{
if (bands.Contains(bands.Where(band => band.Name.ToUpper() == groupName.ToUpper()).FirstOrDefault()))
{
using (var context = new MusicContext())
{
var bandToDelete = context.Bands.Where(band => band.Name.ToUpper() == groupName.ToUpper()).FirstOrDefault();
context.Entry(bandToDelete).Collection(s => s.Songs).Load();
context.Bands.Remove(bandToDelete);
context.SaveChanges();
}
}
else
{
Console.WriteLine("There is no such group!");
}
}
else
{
Console.WriteLine("Empty line!");
}
}
private void DeleteSong()
{
foreach (var song in songs)
{
song.Print();
Console.WriteLine();
}
Console.WriteLine("Введите название песни: ");
string songName = Console.ReadLine();
if (!string.IsNullOrWhiteSpace(songName))
{
if (songs.Contains(songs.Where(song => song.Name.ToUpper() == songName.ToUpper()).FirstOrDefault()))
{
using (var context = new MusicContext())
{
var songToDelete = context.Songs.Where(song => song.Name.ToUpper() == songName.ToUpper()).FirstOrDefault();
context.Songs.Remove(songToDelete);
context.SaveChanges();
}
}
else
{
Console.WriteLine("There is no such song!");
}
}
else
{
Console.WriteLine("Empty line!");
}
}
private int MainMenu()
{
using (var context = new MusicContext())
{
bands = context.Bands.ToList();
songs = context.Songs.ToList();
}
Console.WriteLine("Select an action: \n" + "1) Add a group\n" + "2) Add a song\n" + "3) Search by group\n"
+ "4) Search by song\n" + "5) Post songs by rating\n" + "6) Delete group\n" + "7) Delete song");
if (int.TryParse(Console.ReadLine(), out int menu))
{
if (menu > 0 && menu <= 7)
{
return(menu);
}
}
return(-1);
}
private void AddGroup()
{
string groupName;
Console.WriteLine("Enter group name: ");
groupName = Console.ReadLine();
if (!string.IsNullOrWhiteSpace(groupName))
{
Band newBand = new Band();
newBand.Name = groupName;
using (var context = new MusicContext())
{
bands.Add(newBand);
context.Bands.Add(newBand);
context.SaveChanges();
}
}
else
{
Console.WriteLine("Empty group name!");
}
}
private void AddSong()
{
string songName, songWordsString, songBandName;
long songDuration;
int songRating;
List <string> songWords = new List <string>();
Console.WriteLine("Enter the name of the song: ");
songName = Console.ReadLine();
if (!string.IsNullOrWhiteSpace(songName))
{
if (bands.Count > 0)
{
Song newSong = new Song();
newSong.Name = songName;
Console.WriteLine("Enter the length of the song(in seconds): ");
if (long.TryParse(Console.ReadLine(), out songDuration))
{
if (songDuration > 0)
{
newSong.DurationSeconds = songDuration;
Console.WriteLine("Enter song rating: ");
if (int.TryParse(Console.ReadLine(), out songRating))
{
if (songRating >= MIN_RATING_SONG && songRating <= MAX_RATING_SONG)
{
newSong.Rating = songRating;
Console.WriteLine("Add words: ");
songWordsString = Console.ReadLine();
string[] words = songWordsString.Split(' ');
foreach (var word in words)
{
songWords.Add(word);
}
newSong.Words = songWords;
Console.WriteLine("Enter group name: ");
foreach (var band in bands)
{
Console.WriteLine($"{band.Name}");
}
songBandName = Console.ReadLine();
if (bands.Contains(bands.Where(band => band.Name.ToUpper() == songBandName.ToUpper()).FirstOrDefault()))
{
using (var context = new MusicContext())
{
newSong.Band = context.Bands.Where(band => band.Name.ToUpper() == songBandName.ToUpper()).FirstOrDefault();
context.Songs.Add(newSong);
context.SaveChanges();
}
}
else
{
Console.WriteLine("No such group!");
}
}
else
{
Console.WriteLine($"Rating must be between {MIN_RATING_SONG} and {MAX_RATING_SONG} inclusive");
}
}
else
{
Console.WriteLine("Wrong format!");
}
}
else
{
Console.WriteLine("The song can not last less than 1 second!");
}
}
else
{
Console.WriteLine("Wrong format!");
}
}
else
{
Console.WriteLine("First you need to add groups!");
}
}
else
{
Console.WriteLine("Empty song name!");
}
}
