/// <summary>
/// Determines whether this GraphicsCard object is equal to the GraphicsCard
/// argument object. Both are deemed equal if they both have the same
/// manufacturer and model. Once two GraphicsCards have been declared equal,
/// then they are both assigned the same ID elsewhere in the application.
/// </summary>
/// <param name="obj">The object this one will be compared to.</param>
/// <returns>True if the GraphicsCard object is equal to this, false otherwise.</returns>
public override bool Equals(object obj)
{
if (obj is GraphicsCard)
{
GraphicsCard that = (GraphicsCard)obj;
return(this.Manufacturer.Equals(that.Manufacturer) && this.Model.Equals(that.Model));
}
else
{
return(false);
}
}
public static void Initialise(IApplicationBuilder app)
{
//Obtain application database context
ApplicationDbContext context = app.ApplicationServices.GetRequiredService <ApplicationDbContext>();
context.Database.Migrate();
//Only perform seeding operation if no domain objects exist in the database
if (!context.Computers.Any())
{
//Extract raw data rows from flat text file
string[] rows = File.ReadAllLines("wwwroot/data/SeedData.txt");
foreach (string row in rows)
{
//Parse each column
string[] cells = row.Split("\t".ToCharArray());
string rawMemory = cells[0];
string rawStorage = cells[1];
string rawConnections = cells[2];
string rawGraphicsCard = cells[3];
string rawWeight = cells[4];
string rawPower = cells[5];
string rawProcessor = cells[6];
//Create processor object
Processor processor = new Processor
{
Manufacturer = rawProcessor.Split(' ')[0],
Model = rawProcessor.Substring(rawProcessor.IndexOf(' ') + 1)
};
if (!SeedProcessors.Contains(processor))
{
SeedProcessors.Add(processor);
}
//Create graphics card object
GraphicsCard graphicsCard = new GraphicsCard
{
Manufacturer = rawGraphicsCard.Split(' ')[0],
Model = rawGraphicsCard.Substring(rawGraphicsCard.IndexOf(' ') + 1)
};
if (!SeedGraphicsCards.Contains(graphicsCard))
{
SeedGraphicsCards.Add(graphicsCard);
}
//Construction connection objects and add to database context
string[] connectionInstances = rawConnections.Split(',').Select(s => s.Trim()).ToArray();
SeedPorts.AddRange(connectionInstances
.Select(c => new Port {
Name = c.Split("x")[1].Trim()
})
.Where(p => !SeedPorts.Contains(p)));
List <Connection> connections = connectionInstances
.Select(c => new Connection {
Quantity = int.Parse(c.Split("x")[0].Trim()),
Port = SeedPorts.Where(p => c.Split("x")[1].Trim().Equals(p.Name)).FirstOrDefault()
}).ToList();
//Construct computer object and add to database context
Computer computer = new Computer
{
Memory = CalculateMemory(rawMemory),
Power = CalculatePower(rawPower),
StorageCapacity = CalculateStorageCapacity(rawStorage),
StorageType = rawStorage.Split(' ')[2],
Weight = CalculateWeight(rawWeight),
Processor = SeedProcessors.Where(p => p.Equals(processor)).FirstOrDefault(),
GraphicsCard = SeedGraphicsCards.Where(gc => gc.Equals(graphicsCard)).FirstOrDefault(),
Connections = connections
};
context.Computers.Add(computer);
}
context.SaveChanges();
}
}