/// <summary>
/// Changes Artists ListView sort order.
/// </summary>
/// <param name="sender"></param>
public void SortArtistsView(object sender, ref string lastArtistHeaderClicked, ref ListSortDirection lastArtistDirection)
{
SortListView(sender, ref lastArtistHeaderClicked, ref lastArtistDirection, "Name");
LastArtistDirectionText = lastArtistDirection == ListSortDirection.Ascending ? "A-Z" : "Z-A";
Artists = (lastArtistDirection == ListSortDirection.Ascending
? Artists.OrderBy(i => i.Name)
: Artists.OrderByDescending(i => i.Name)).ToList();
OnPropertyChanged("LastArtistDirectionText");
}
static void Main(string[] args)
{
Init();// this method fills the arrays above with data
// - print the mass of the earth on July 1895 XD
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*/
// QUERIES!
// - how many Songs start with the letter 'a' (case insensitive)
// - how many artists end with letter 'a' (case insensitive)
// - whats the name of the song with longest duration
// - whats the total Duration of all Songs
// - how many albums have Songs longer than 300 seconds
// - print the names of the artists(separated with "--"), that have more than one album of PopRock genre
// - print the name of the album that has highest Average duration of a song
// - how many characters has the song that has the shortest Duration
// - print the name and the genre of the album that has most songs
// - print the name of the artist that has most songs
// - print the type of the artist(SoloArtist/Band) that has most albums published before year 2000
// - print the average song duration, of the album that has most songs
// Bonus:
// - print the longest song duration of the album that has least songs
// - print the name of the album that has most songs that contain letter 'a' in the name
// - print the name of the artist that has most songs that end with letter 'd'
// ************ Don't mind the structure, focus on the lists declared on the beginning of Program.cs ****************
// 3, 2, 1.... GO! :)
// - how many Songs start with the letter 'a' (case insensitive)
int songsStartsWithA = Songs.Select(x => x.Name.ToLower())
.Where(x => x.StartsWith("a"))
.ToList()
.Count();
Console.WriteLine(songsStartsWithA);
// - how many artists end with letter 'a' (case insensitive)
int artistEndWithA = Artists.Select(x => x.FullName.ToLower())
.Where(x => x.EndsWith("a"))
.ToList()
.Count();
Console.WriteLine(artistEndWithA);
// - whats the name of the song with longest duration
Song longestSong = Songs.FirstOrDefault(x => x.Duration == Songs
.Select(y => y.Duration)
.Max());
Console.WriteLine(longestSong.Name);
// - whats the total Duration of all Songs
int totalDurationSongs = Songs.Select(x => x.Duration)
.Sum();
Console.WriteLine(totalDurationSongs);
// - how many albums have Songs longer than 300 second
int longerThan300 = Songs.Where(x => x.Duration > 300)
.GroupBy(x => x.AlbumId)
.ToList()
.Count();
Console.WriteLine(longerThan300);
// - print the names of the artists(separated with "--"), that have more than one album of PopRock genre
var PopRockgenre = Artists.Where(x => x.Albums
.Where(y => y.Genre == Genre.PopRock).ToList().Count() > 1)
.Select(v => v.FullName)
.ToList();
PopRockgenre.ForEach(q => Console.Write($"{q} -- "));
//foreach (var item in Artists)
//{
// int popRockAlbums = item.Albums.Where(x => x.Genre == Genre.PopRock).ToList().Count();
// if (popRockAlbums > 1)
// {
// Console.Write($"{item.FullName} -- ");
// }
//}
// - print the name of the album that has highest Average duration of a song
Album highestAverageDuration = Albums.OrderBy
(x => x.Songs.Select(y => y.Duration)
.Average())
.ToList()
.LastOrDefault();
Console.WriteLine();
Console.WriteLine(highestAverageDuration.Name);
// - how many characters has the song that has the shortest Duration
Song manyCharactersShortest = Songs
.OrderByDescending(x => x.Duration)
.ToList()
.LastOrDefault();
Console.WriteLine(manyCharactersShortest.Name.Count());
// - print the name and the genre of the album that has most songs
Album mostSongsAlbum = Albums
.OrderBy(x => x.Songs.Count())
.ToList()
.LastOrDefault();
Console.WriteLine($"{mostSongsAlbum.Name} {mostSongsAlbum.Genre}");
// - print the name of the artist that has most songs
string artistMostoSongs = Artists
.OrderBy(x => x.Albums
.Select(y => y.Songs)
.Count()).Select(z => z.FullName).LastOrDefault();
Console.WriteLine(artistMostoSongs);
// - print the type of the artist(SoloArtist/Band) that has most albums published before year 2000
Genre mostAlbumsBefore2000 = Albums
.Where(x => x.Year < 2000)
.Select(y => y.Genre)
.Max();
Console.WriteLine(mostAlbumsBefore2000);
// - print the average song duration, of the album that has most songs
double AverageSongDurationMax = Albums.Where(x => x.Songs.Count() == Albums
.Select(y => y.Songs.Count()).Max())
.FirstOrDefault().Songs
.Select(z => z.Duration)
.Average();
Console.WriteLine(AverageSongDurationMax);
// Bonus:
// - print the longest song duration of the album that has least songs
int LongestSongDuration = Albums.Where(x => x.Songs.Count() == Albums
.Select(y => y.Songs.Count()).Min())
.FirstOrDefault().Songs
.Select(z => z.Duration)
.Max();
Console.WriteLine(LongestSongDuration);
// - print the name of the album that has most songs that contain letter 'a' in the name
string nameOfTheAlbumWithA = Albums.Where(x => x.Songs
.Where(y => y.Name.ToLower().Contains('a')).Count() == Albums
.Select(z => z.Songs
.Where(q => q.Name.ToLower().Contains('a')).Count())
.Max()).Select(u => u.Name)
.FirstOrDefault();
Console.WriteLine(nameOfTheAlbumWithA);
// - print the name of the artist that has most songs that end with letter 'd'
string nameOfTheArtistD = Artists.Where(x => x.Albums
.Select(y => y.Songs
.Where(z => z.Name.ToLower().EndsWith('d')).Count()).Sum() == Artists
.Select(q => q.Albums
.Select(w => w.Songs
.Where(e => e.Name.ToLower().EndsWith('d')).Count()).Sum()).Max()).Select(r => r.FullName)
.FirstOrDefault();
Console.WriteLine(nameOfTheArtistD);
Console.ReadLine();
}
