/// <summary>
/// Get user from users base by its idNumber.
/// </summary>
/// <param name="userId">User's idNumber</param>
/// <returns>User if exist, null pointer otherwise</returns>
public static User GetUserById(int userId)
{
DataBase db = DataBase.GetInstance();
db.SetConnections(Constants.PATH);
db.LoadUsers();
return(db.GetUserById(userId));
}
/// <summary>
/// Prints list of products.
/// </summary>
private static void ShowProducts()
{
DataBase db = DataBase.GetInstance();
db.LoadProducts();
List <Product> products = new List <Product>();
products = db.Products;
foreach (Product product in products)
{
Console.WriteLine(product.ToString());
}
}
/// <summary>
/// Deletes a user from the database
/// </summary>
/// <param name="userId">id of the user to delete</param>
/// <returns>false if there is no such user in the database</returns>
public static bool DeleteUser(int userId)
{
bool success = false;
DataBase db = DataBase.GetInstance();
db.SetConnections(Constants.PATH);
db.LoadUsers();
success = db.Users.Remove(db.GetUserById(userId));
db.CommitUsers();
return(success);
}
/// <summary>
/// Adds new product to DataBase.
/// </summary>
private static void AddNewProduct()
{
int id;
string name;
double price;
Console.WriteLine("Input id of product");
id = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Input name of product");
name = Console.ReadLine();
Console.WriteLine("Input price of product");
price = Convert.ToDouble(Console.ReadLine());
Product product = new Product(id, name, price);
DataBase db = DataBase.GetInstance();
db.Add(product);
}
/// <summary>
/// Method adds new user to database
/// </summary>
/// <param name="newName">new user's name</param>
/// <param name="newPassword">new user's password</param>
/// <param name="rolesIdes">List of Ides of user's roles</param>
/// <returns></returns>
public static bool AddNewUser(string newName, string newPassword, List <int> rolesIdes)
{
if (CheckNameExistence(newName) == true)
{
return(false);
}
DataBase db = DataBase.GetInstance();
db.SetConnections(Constants.PATH);
db.LoadUsers();
db.Add(new User(db.Users.Last().Id + 1, newName, newPassword, rolesIdes));
db.CommitUsers();
return(true);
}
/// <summary>
/// Checks if the current name is in the database
/// </summary>
/// <param name="nameToCheck">the name to search for</param>
/// <returns>True if the name is found</returns>
private static bool CheckNameExistence(string nameToCheck)
{
DataBase db = DataBase.GetInstance();
db.SetConnections(Constants.PATH);
db.LoadUsers();
foreach (User user in db.Users)
{
if (user.Login == nameToCheck)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Return a list of users by the role
/// </summary>
/// <param name="roleId">The role's id to check by</param>
/// <returns>A list of users by the role</returns>
public static System.Collections.Generic.List <User> GetUsersByRole(int roleId)
{
DataBase db = DataBase.GetInstance();
db.SetConnections(Constants.PATH);
db.LoadUsers();
List <User> toReturn = null;
foreach (User user in db.Users)
{
if (user.RolesId.Contains(roleId))
{
toReturn.Add(user);
}
}
return(toReturn);
}
/// <summary>
/// This method performs logging in.
/// </summary>
/// <param name="forLogin">Login that the current user has entered.</param>
/// <param name="forPassword">Password that the current user has entered.</param>
/// <returns>True if user is logged in.</returns>
public static User Identify(string forLogin, string forPassword)
{
User toReturn = null;
DataBase db = DataBase.GetInstance();
db.SetConnections(Constants.PATH);
db.LoadUsers();
foreach (User user in db.Users)
{
if (user.Login == forLogin && user.Password == forPassword)
{
toReturn = user;
break;
}
}
return(toReturn);
}
/// <summary>
/// Method removes user's role
/// </summary>
/// <param name="userId">User's idNumber</param>
/// <param name="roleId">The role's id to remove</param>
/// <returns>True if role was successfully removed </returns>
public static bool RemoveUsersRole(int userId, int roleId)
{
DataBase db = DataBase.GetInstance();
db.SetConnections(Constants.PATH);
db.LoadUsers();
foreach (User user in db.Users)
{
if (user.Id == userId)
{
user.RolesId.Remove(roleId);
return(true);
}
}
db.CommitUsers();
return(false);
}
