handler.ex

defmodule Nthn.Entry.Handler do
  import Ecto.Query
  alias Nthn.Entry
  alias Nthn.Repo

  def init({:tcp, :http}, req, opts) do
    {:ok, req, opts}
  end

  def handle(req, state) do
    {method, req} = :cowboy_req.method(req)
    {param, req} = :cowboy_req.binding(:id, req)

    contenttype = {"content-type", "application/json; charset=utf-8"}
    {:ok, resp} = resource(String.to_atom(method), param, req)

    {:ok, reply} = :cowboy_req.reply(200, [contenttype], resp, req)
    {:ok, reply, state}
  end

  def resource(:GET, :undefined, _req) do
    results = Entry |> Repo.all |> Poison.encode! pretty: true
    {:ok, results}
  end

  def resource(:GET, param, _req) do
    result = Entry |> where([entry], entry.id == ^param) |> Repo.all |> Poison.encode! pretty: true
    {:ok, result}
  end

  def resource(:POST, :undefined, req) do
    {:ok, body, req} = :cowboy_req.body(req)
    {:ok, entry} = Poison.decode!(body, as: Entry) |> Repo.insert
    {host_url, _req} = :cowboy_req.host_url(req)
    {:ok, "#{host_url}/entries/#{entry.id}"}
  end

  def resource(:PUT, param, req) do
    {:ok, nil}
  end
  
  def resource(:DELETE, param, req) do
    {:ok, nil}
  end

  def terminate(reason, _req, _state) do
    IO.puts("Terminating: #{inspect(reason)}")
    :ok
  end
end