Unicity

Extensions for auto-incrementing numbers in non-database settings.

Major updates

As of 2.1.0, Unicity's methods use generic maths and therefore (should) support all base numeric types. This was previously limited to System.Int32.

Gettings started

With `IAutoIncrementedId<T>`

//The IAutoIncrementedId<T> interface forces your implementing types to have a T Id with a get accessor
public record YourClass : IAutoIncrementedId<int>
{
	public int Id { get; init; }
	...
}

//Will get the next available number from the _items collection or `0`
var yourObject = new YourClass 
{ 
	Id = _items.GetNextAvailableIdOrDefault();
	...
};

//Or if you don't like `0` as a `defaultValue`, you can set it to something else like `1`
var yourObject = new YourClass
{ 
	Id = _items.GetNextAvailableIdOrDefault(1);
	...
};

Without `IAutoIncrementedId<T>`

Maybe you don't have control over YourClass or maybe you don't want to use the IAutoIncrementedId<int> interface. You can use the GetNextAvailableIdOrDefault method for those casse.

public record YourClass
{
	public int Number { get; init; }
	...
}

//This will give you the largest `Number` property in the collection `+ 1` or `0`
var yourOtherObject = new YourClassWithoutId
{
	Number = _otherItems.GetNextAvailableNumberOrDefault(x => x.Number)
}

//You can also specify a `defaultValue` if you don't like `0` (`5` in this case)
var yourOtherObject = new YourClassWithoutId
{
	Number = _otherItems.GetNextAvailableNumberOrDefault(x => x.Number, 5)
}

Breaking changes

2.1.X -> 2.2.0 (July 2023)

Method GetNextAvailableId is renamed to GetNextAvailableIdOrDefault which includes an optional defaultValue of 0. Both methods are supported as of 2.1.0 to facilitate the move.

FredericVaugeoisFlo/MUnicity