/// <summary>
/// Returns the wanted value of the setting.
/// </summary>
/// <typeparam name="T">Type of the wanted setting value.</typeparam>
/// <exception cref="EmptySettingException">Thrown if the setting is completly empty.</exception>
/// <exception cref="ActiveTypeLockException">Thrown if TypeLock is enabled and an invalid type was given.</exception>
/// <exception cref="InvalidSettingTypeException">Thrown if value is an unsupported setting type.</exception>
/// <returns>Value of the wanted type from the setting.</returns>
public T GetValue <T>()
{
// Setting.SetValue never called -> exception;
if (!SettingTypes.Any())
{
throw new EmptySettingException($"The setting \"{Key}\" does not have any values at this time.");
}
// TypeLock enabled, type already set and didn’t match -> exception;
if (TypeLock && SettingTypes.Any() && SettingTypes.First() != typeof(T))
{
throw new ActiveTypeLockException(
$"The setting \"{Key}\" has activated TypeLock. " +
"When TypeLock is enabled, a setting can only store and return one data type. " +
$"The data type already used is: \"{SettingTypes.First()}\".");
}
// Wanted type is never setten -> exception;
if (!SettingTypes.Contains(typeof(T)))
{
throw new EmptySettingException($"The setting \"{Key}\" does not store a value of this type.");
}
// Return value for existing type...
if (typeof(T) == typeof(int))
{
return((T)Convert.ChangeType(ValueInt, typeof(T)));
}
if (typeof(T) == typeof(double))
{
return((T)Convert.ChangeType(ValueDouble, typeof(T)));
}
if (typeof(T) == typeof(string))
{
return((T)Convert.ChangeType(ValueString, typeof(T)));
}
if (typeof(T) == typeof(bool))
{
return((T)Convert.ChangeType(ValueBool, typeof(T)));
}
if (typeof(T) == typeof(DateTime))
{
return((T)Convert.ChangeType(ValueDateTime, typeof(T)));
}
// or thro exception and return list of valid types.
throw new InvalidSettingTypeException(
$"The type {typeof(T)} is not a valid setting type. Currently valid setting types are: \n" +
GetType().GetProperties()
.Where(propertyInfo => propertyInfo.Name.StartsWith("Value")).Aggregate("",
(current, propertyInfo) => current + $"{propertyInfo.PropertyType}, ")
.TrimEnd(','));
}
/// <summary>
/// Set a value of the setting, or override it.
/// </summary>
/// <typeparam name="T">Type of the value.</typeparam>
/// <param name="value">New value itself.</param>
/// <exception cref="ActiveTypeLockException">Thrown if TypeLock is enabled and an invalid type was given.</exception>
/// <exception cref="InvalidSettingTypeException">Thrown if value is an unsupported setting type.</exception>
public void SetValue <T>(T value)
{
// TypeLock enabled, type already set and didn’t match -> exception;
if (TypeLock && SettingTypes.Any() && SettingTypes.First() != typeof(T))
{
throw new ActiveTypeLockException(
$"The setting \"{Key}\" has activated TypeLock. " +
"When TypeLock is enabled, a setting can only store and return one data type. " +
$"The data type already used is: \"{SettingTypes.First()}\".");
}
// Set value for existing type...
if (typeof(T) == typeof(int))
{
ValueInt = Convert.ToInt32(value);
}
else if (typeof(T) == typeof(double))
{
ValueDouble = Convert.ToDouble(value);
}
else if (typeof(T) == typeof(string))
{
ValueString = Convert.ToString(value);
}
else if (typeof(T) == typeof(bool))
{
ValueBool = Convert.ToBoolean(value);
}
else if (typeof(T) == typeof(DateTime))
{
ValueDateTime = Convert.ToDateTime(value);
}
else // ...or throw exception and return list of valid types.
{
throw new InvalidSettingTypeException(
$"The type {typeof(T)} is not a valid setting type. Currently valid setting types are: \n" +
GetType().GetProperties()
.Where(propertyInfo => propertyInfo.Name.StartsWith("Value")).Aggregate("",
(current, propertyInfo) => current + $"{propertyInfo.PropertyType}, ")
.TrimEnd(','));
}
// No exception thrown -> store setting type if not already stored.
if (!SettingTypes.Contains(typeof(T)))
{
SettingTypes.Add(typeof(T));
}
}