# Alexa library for Phoenix
[](https://travis-ci.org/gabiz/phoenix_alexa)
## Usage
Add phoenix_alexa as a dependency in your `mix.exs` file.
```elixir
def deps do
[ { :phoenix_alexa, "~> 0.2.0" } ]
end
```
Update a route with a post request into your alexa controller.
```elixir
scope "/", HelloAlexa do
pipe_through :api
post "/", AlexaController, :post
end
```
In the controller add a use statement for `PhoenixAlexa.Controller` and define functions for `launch_request`, `session_end_request` and `intent_request` as follows:
```elixir
defmodule HelloPhoenixAlexa.AlexaController do
use HelloPhoenixAlexa.Web, :controller
use PhoenixAlexa.Controller, :post # param should match route name
def launch_request(conn, request) do
response = %Response{}
|> set_output_speech(%TextOutputSpeech{text: "Welcome to the Horoscope."})
conn
|> set_response(response)
end
def session_end_request(conn, request) do
conn
end
def intent_request(conn, "GetHoroscope", request) do
response = case request.request.intent.slots["Sign"]["value"] do
"Libra" ->
card = %SimpleCard{}
|> set_title("Get Horoscope")
|> set_content("You are going to have an unexpected event today.")
%Response{}
|> set_output_speech(%TextOutputSpeech{text: "You are going to have an unexpected event today."})
|> set_card(card)
|> set_session_attributes(%{my_key: "my_data"})
|> set_should_end_session(true)
_ ->
%Response{}
|> set_output_speech(%TextOutputSpeech{text: "You are going to meet an interesting person."})
|> set_should_end_session(true)
end
conn |> set_response(response)
end
end
```
To authenticate that the request corresponds to your Alexa application add the ValidateApplicationId plug to your router as follows:
```elixir
pipeline :api do
plug :accepts, ["json"]
plug ValidateApplicationId, "amzn1.echo-sdk-ams.app.05dcb1a4-cb45-46c5-a30e-bb3033a0770a"
end
```
