/// <summary>
/// Update the number of people that are using the image, and if 0, delete the image
/// </summary>
/// <param name="guid">guid of the number of people accessing the image</param>
/// <param name="delta">Change to add to the count of number of people using image</param>
/// <returns>New number of people using the image</returns>
private static async Task <int> DoUpdateImageCount(string guid, int delta, HttpRequest request, ImageContext context)
{
int newCount = 0;
try
{
Image originalImage = context.Image.First(image => image.Id == guid);
originalImage.NumberPeopleAssignedTo += delta;
newCount = originalImage.NumberPeopleAssignedTo;
if (newCount <= 0)
{
originalImage.NumberPeopleAssignedTo = 0;
context.Image.Remove(originalImage);
newCount = 0;
}
else
{
context.Image.Update(originalImage);
}
await context.SaveChangesAsync();
}
catch (Exception exception)
{
// Log Exception in appropriate place
MessageHandler.Error("Trying to update the number of people assigned to an image", request, exception);
}
return(newCount);
}
/// <summary>
/// Seed the Database
/// </summary>
/// <param name="serviceProvider"></param>
public static void Initialize(DbContextOptions <ImageContext> imageDbOptions,
DbContextOptions <PeopleSearchContext> peopleDbContext)
{
Image imageUnknown;
Image imageRichard;
Image imageTrent;
// Create the Image Database Entries
// Using the Context object
using (var context = new ImageContext(imageDbOptions))
{
// Check for anybody already in the database
if (context.Image.Any())
{
// Database already seeded, exit
return;
}
// Create Images
imageUnknown = new Image(@".\SeedData\Unknown.jpg")
{
Id = "0"
};
imageRichard = new Image(@".\SeedData\Richard.jpg")
{
NumberPeopleAssignedTo = 1
};
imageTrent = new Image(@".\SeedData\Trent.jpg")
{
NumberPeopleAssignedTo = 1
};
context.Image.AddRange(imageUnknown, imageRichard, imageTrent);
context.SaveChanges();
}
// Using the Context object
using (var context = new PeopleSearchContext(peopleDbContext))
{
// Check for anybody already in the database
if (context.Person.Any())
{
// Database already seeded, exit
return;
}
Person richard = new Person
{
FirstName = "Richard",
LastName = "Bousman",
BirthDate = new DateTime(1990, 10, 17),
ImageGUID = imageRichard.Id,
AddressLine1 = "2880 Sandestin",
AddressLine2 = "",
City = "Reno",
StateOrTerritory = "Nevada",
ZipCode = "89523",
Country = "USA"
};
Person trent = new Person
{
FirstName = "Trent",
LastName = "Wignall",
BirthDate = new DateTime(1989, 6, 19),
ImageGUID = imageTrent.Id,
AddressLine1 = "Corner Office",
AddressLine2 = "3165 Millrock Dr",
City = "Salt Lake City",
StateOrTerritory = "Utah",
ZipCode = "84121",
Country = "USA"
};
Person fred = new Person
{
FirstName = "Fred",
LastName = "Flinestone",
BirthDate = new DateTime(0001, 5, 4),
ImageGUID = imageUnknown.Id,
AddressLine1 = "245 Rock Blvd",
AddressLine2 = "",
City = "Bedrock",
StateOrTerritory = "Stonehenge",
ZipCode = "00000",
Country = "Prehistoric"
};
// Add some People
context.Person.AddRange(richard, trent, fred);
context.Interest.AddRange(
new Interest
{
Person = richard,
TheInterest = "Programming"
},
new Interest
{
Person = richard,
TheInterest = "Baseball"
},
new Interest
{
Person = trent,
TheInterest = "Personnel"
},
new Interest
{
Person = trent,
TheInterest = "Cycling"
},
new Interest
{
Person = fred,
TheInterest = "Rock Climbing"
}
);
// Save new entries to database, assigning personId's
context.SaveChanges();
}
}
/// <summary>
/// Update the number of people that are using the image, and if 0, delete the image
/// </summary>
/// <param name="guid">guid of the number of people accessing the image</param>
/// <param name="delta">Change to add to the count of number of people using image</param>
/// <param name="context">Existing context to use. If null (default) then a context will be created</param>
/// <param name="request">Http Request being processed at this moment</param>
/// <returns>New number of people using the image</returns>
public static async Task <int> UpdateImageCount(string guid, int delta, HttpRequest request = null, ImageContext context = null)
{
if (guid == UnknownImageGuid)
{
return(0);
}
if (context == null)
{
using (context = new ImageContext())
{
return(await DoUpdateImageCount(guid, delta, request, context));
}
}
else
{
return(await DoUpdateImageCount(guid, delta, request, context));
}
}
