feeder.ex

defmodule FeedApi.Utils.Feeder do

  @doc """
  We try to get the tweets from the timeline of the user
  It will fetch all the needed entry and return them into an array
  """
  def feed! do
    from_twitter!
  end

  def from_twitter! do
    FeedApi.Scrappers.Twitter.dispatch! |> fetch!
  end

  defp fetch!(data) do
    for entry <- data do
      if entry |> valid? do
        change_entry!(FeedApi.Repo.get_by(FeedApi.Link, title: entry.message), entry)
      end
    end
  end

  defp valid?(entry = %{}) do
    IO.inspect entry
    case entry do
      %{link: nil} -> false
      %{message: nil} -> false
       %{message: ""} -> false
       _ -> true
    end
  end

  defp change_entry!(link, entry) do
    if link |> is_nil do
      # let's insert this entry
      FeedApi.Repo.insert! %FeedApi.Link{
        title: entry.message,
        description: nil,
        url: entry.link,
        source: "twitter",
        published_at: entry.date
      }
    else
      # let's update this entry
      FeedApi.Repo.update! FeedApi.Link.changeset(link, %{
        title: entry.message,
        description: nil,
        url: entry.link,
        source: "twitter",
      })
    end
  end

end