# Talos

Talos is simple parameters validation library

Documentation can be found at [ExDoc](https://hexdocs.pm/talos/)

## Sample example

```elixir
  defmodule MyAppWeb.UserController do
    # we define required types and structs
    alias Talos.Field
    alias Talos.Types.MapType
    alias Talos.Types.ListType
    alias Talos.Types.EnumType
    alias Talos.Types.NumberType
    alias Talos.Types.StringType
    # here we define expected struct
    @interests_type %EnumType{
      members: [
        "sports",
        "games",
        "food"
      ]
    }
    # one struct can be nested in another
    @user_type %MapType{
      fields: [
        %Field{key: "email" type: %StringType{min_length: 5, max_length: 255, regexp: ~r/.*@.*/}},
        %Field{key: "age" type: %NumberType{gteq: 18}, allow_nil: true},
        %Field{key: "interests" type: %ListType{type: @interests_type}, allow_nil: true}
      ]
    }
    def create(conn, params) do
      case Talos.valid?(@user_type, params) do
        true ->
          user = MyApp.create_user(params)
          conn
          |> put_flash(:info, "User created successfully.")
          |> redirect(to: Routes.user_path(conn, :show, user))
        false ->
          conn
          |> put_flash(:info, "Wrong params passed.")
          |> render("new.html")
      end
    end
  end
```

## Installation

```elixir
def deps do
  [
    {:talos, "~> 1.0.0"}
  ]
end
```