private static void PrintPicuresInMoreThanTwoAlbums(SotialNetworkDbContext db)
{
var result = db.Picture
.Where(p => p.Albums.Count > 2)
.Select(p => new
{
p.Title,
Albums = p.Albums.Select(a => new
{
Name = a.Album.Name,
UserName = a.Album.User.Name
})
})
.OrderByDescending(p => p.Albums.Count())
.ThenBy(p => p.Title)
.ToList();
foreach (var picutes in result)
{
Console.WriteLine($"{picutes.Title}");
foreach (var album in picutes.Albums)
{
Console.WriteLine($"album {album.Name} - users album {album.UserName}");
}
}
}
public static void Main()
{
//before start check stating class
using (var db = new SotialNetworkDbContext())
{
db.Database.Migrate();
//----Use to seed data
//SeedUsers(db);
//Addting in table AlbumPicture dont work :/
//SeedAlbumsAndPictures(db);
//---Task N-1
//PrintUsersAndTheirFriends(db);
//---Task N-2
//PrintActiveUsersWithMoreThanFiveFriends(db);
//---Task from albums N-1
//PrintAlbumsWithUserNames(db);
//---Task from albums N-2
//it wont show any becouse AlbumPicure is empty
//PrintPicuresInMoreThanTwoAlbums(db);
//---Task from albums N-3
//it wont show pictures becouse AlbumPicture is empty but other thinks is working
//PrintAlbumsInfo(db);
}
}
private static void PrintUsersAndTheirFriends(SotialNetworkDbContext db)
{
var result = db.Users
.Select(u => new
{
u.Name,
FriendsNumber = u.FromFriends.Count + u.ToFriends.Count,
Status = u.IsDeleted ? "Inactive" : "Active"
})
.OrderByDescending(u => u.FriendsNumber)
.ThenBy(u => u.Name)
.ToList();
foreach (var user in result)
{
Console.WriteLine($"User name = {user.Name}, friends = {user.FriendsNumber}, activity = {user.Status}");
}
}
private static void PrintAlbumsWithUserNames(SotialNetworkDbContext db)
{
var result = db.Album
.Select(a => new
{
a.Name,
UserName = a.User.Name,
Pictures = a.Pictures.Count
})
.OrderByDescending(a => a.Pictures)
.ThenBy(a => a.UserName)
.ToList();
foreach (var album in result)
{
Console.WriteLine($"{album.Name} - user {album.UserName} - pictures {album.Pictures}");
}
}
private static void PrintActiveUsersWithMoreThanFiveFriends(SotialNetworkDbContext db)
{
var result = db.Users
.Where(u => !u.IsDeleted)
.Where(u => (u.FromFriends.Count + u.ToFriends.Count) > 5)
.OrderBy(u => u.RegistratedOn)
.ThenByDescending(u => (u.FromFriends.Count + u.ToFriends.Count))
.Select(u => new
{
u.Name,
FriendsNumber = u.FromFriends.Count + u.ToFriends.Count,
Period = DateTime.Now.Subtract(u.RegistratedOn.Value)
})
.ToList();
foreach (var user in result)
{
Console.WriteLine($"{user.Name} - {user.FriendsNumber}friends - {user.Period.Days} period he was on");
}
}
private static void PrintAlbumsInfo(SotialNetworkDbContext db)
{
int userId = 2;
var result = db.Album
.Where(a => a.Id == userId)
.Select(a => new
{
Owner = a.User.Name,
a.IsPublic,
a.Name,
Pictures = a.Pictures
.Select(p => new
{
p.Picture.Title,
p.Picture.Path
})
})
.OrderBy(a => a.Name)
.ToList();
foreach (var album in result)
{
Console.WriteLine(album.Owner);
if (album.IsPublic)
{
Console.WriteLine(album.Name);
foreach (var picture in album.Pictures)
{
Console.WriteLine($"picute {picture.Title} - path {picture.Path}");
}
}
else
{
Console.WriteLine(album.Name);
Console.WriteLine("Private content!");
}
}
}
private static void SeedUsers(SotialNetworkDbContext db)
{
Console.WriteLine($"Adding db...");
var allUsers = new List <Users>();
for (int i = 0; i < 10; i++)
{
var user = new Users
{
Name = $"Pesho{i}",
Password = "******",
Email = $"ddddd.efe@abv{i}.bg",
RegistratedOn = DateTime.Now.AddDays(-(100 + i * 10)),
LastTimeLoggedIn = DateTime.Now.AddDays(-i),
Age = 22
};
allUsers.Add(user);
db.Users.Add(user);
}
db.SaveChanges();
var userId = allUsers
.Select(u => u.Id)
.ToList();
for (int i = 0; i < userId.Count; i++)
{
var currentUserId = userId[i];
Random random = new Random();
var totalFriends = random.Next(1, 20);
for (int j = 0; j < totalFriends; j++)
{
var friendId = userId[random.Next(0, userId.Count)];
bool validFriendship = true;
if (friendId == currentUserId)
{
validFriendship = false;
}
var friendShipExists = db
.FriendShip
.Any(f => (f.FromUserId == currentUserId && f.ToUserId == friendId) ||
(f.FromUserId == friendId && f.ToUserId == currentUserId));
if (friendShipExists)
{
validFriendship = false;
}
if (!validFriendship)
{
continue;
}
db.FriendShip.Add(new FriendShip
{
FromUserId = currentUserId,
ToUserId = friendId
});
db.SaveChanges();
}
}
Console.WriteLine("Db added!");
}
private static void SeedAlbumsAndPictures(SotialNetworkDbContext db)
{
int biggestAlbId = db.Album
.OrderByDescending(a => a.Id)
.Select(a => a.Id)
.FirstOrDefault() + 1;
List <int> userIds = db.Users
.Select(u => u.Id)
.ToList();
Random random = new Random();
List <Album> albums = new List <Album>();
for (int i = biggestAlbId; i < biggestAlbId + 100; i++)
{
var album = new Album
{
Name = $"Album {i}",
BackgroundColor = $"Color {i}",
IsPublic = random.Next(0, 2) == 0 ? true : false,
UserId = userIds[random.Next(0, userIds.Count)]
};
albums.Add(album);
db.Album.Add(album);
}
db.SaveChanges();
int biggestPicture = db.Picture
.Select(p => p.Id)
.FirstOrDefault() + 1;
List <Picture> pictures = new List <Picture>();
for (int i = biggestPicture; i < biggestPicture + 500; i++)
{
Picture picture = new Picture
{
Title = $"Picture {i}",
Caption = $"Caption {i}",
Path = $"Path {i}"
};
pictures.Add(picture);
db.Picture.Add(picture);
}
db.SaveChanges();
//List<int> albumIds = albums.Select(a => a.Id).ToList();
//for (int i = 0; i < pictures.Count; i++)
//{
// Picture picture = pictures[i];
// int numberOfAlbums = random.Next(1,20);
// for (int j = 0; j < numberOfAlbums; j++)
// {
// int albumId = albumIds[random.Next(0, albumIds.Count)];
// var pictureExistInAlbum = db.Picture
// .Any(p => p.Id == picture.Id && p.Albums.Any(a => a.AlbumId == albumId));
// if (pictureExistInAlbum)
// {
// continue;
// }
// picture.Albums.Add(new AlbumPicture
// {
// AlbumId=albumId
// });
// }
// db.SaveChanges();
//}
}
