# Massex
Massex is a simple pattern for holding masses and interacting with them in a sensible manner.
It follows the whole value pattern, and allows easy storage, retrieval and mathematics upon
values of mass in disparate scales.
```elixir
iex> one = Massex.new(10, :gram)
...> two = Massex.new(10, :ounce)
...> Massex.add(one, two)
```
## Supporting Libraries
Massex ships with Jason support which will automatically be loaded if
your project is using Jason for JSON handling. Additionally, it also
supports Absinthe and Ecto.
### Absinthe
To activate the Absinthe support, just import the types in your schema:
```elixir
import_types Massex.Absinthe.Type
```
You can then use Massex objects in your Schemas
```elixir
object :lorry do
field :mass, :mass
end
```
Or in your mutations
```elixir
payload field :set_lorry_mass do
input do
field :id, non_null(:id)
field :mass, non_null(:mass_input)
end
end
```
### Ecto
You can transparently store Massex structs in your schemas by
adding the mass field as a map/json/jsonb type in your schema.
```elixir
schema "lorries" do
field :mass, Massex.Ecto.Type
end
```
## Installation
If [available in Hex](https://hex.pm/docs/publish), the package can be installed
by adding `massex` to your list of dependencies in `mix.exs`:
```elixir
def deps do
[
{:massex, "~> 0.1.0"}
]
end
```
Documentation can be generated with [ExDoc](https://github.com/elixir-lang/ex_doc)
and published on [HexDocs](https://hexdocs.pm). Once published, the docs can
be found at [https://hexdocs.pm/massex](https://hexdocs.pm/massex).
