public bool Exists(Category category)
{
using (var db = new DBContext())
{
return db.Categories.Where(x => x.Name == category.Name).Count() > 0;
}
}
public List<Category> GetCategories()
{
using (var db = new DBContext())
{
return db.Categories.ToList();
}
}
public Expense GetExpenseById(int id)
{
using (var db = new DBContext())
{
return db.Expenses.Single(x => x.ExpenseId == id);
}
}
public List<Expense> GetExpenses(DateTime from, DateTime to)
{
var db = new DBContext();
return db.Expenses
.Where(expense => DbFunctions.TruncateTime(expense.Date) >= from
&& DbFunctions.TruncateTime(expense.Date) <= to)
.ToList();
}
public int Add(Expense expense)
{
using (var db = new DBContext())
{
db.Categories.Attach(expense.Category);
db.Expenses.Add(expense);
db.SaveChanges();
return expense.ExpenseId;
}
}
public void Add(Category category)
{
using (var db = new DBContext())
{
try
{
db.Categories.Add(category);
db.SaveChanges();
}
catch (System.Data.Entity.Infrastructure.DbUpdateException)
{
throw new Repositories.Exceptions.CategoryAlreadyExistsException();
}
}
}
public Dictionary<string, double> GetExpenseSummaryByCategory(DateTime from, DateTime to)
{
Dictionary<string, double> expensesByCategory = new Dictionary<string,double>();
var db = new DBContext();
foreach (var category in db.Categories)
{
double summary = db.Expenses
.Where(expense => DbFunctions.TruncateTime(expense.Date) >= from
&& DbFunctions.TruncateTime(expense.Date) <= to)
.Select(expense => expense.Amount)
.Sum();
expensesByCategory.Add(category.Name, summary);
}
return expensesByCategory;
}
