philomena/lib/philomena/user_links.ex

defmodule Philomena.UserLinks do
  @moduledoc """
  The UserLinks context.
  """

  import Ecto.Query, warn: false
  alias Philomena.Repo

  alias Philomena.UserLinks.UserLink
  alias Philomena.Tags.Tag

  @doc """
  Returns the list of user_links.

  ## Examples

      iex> list_user_links()
      [%UserLink{}, ...]

  """
  def list_user_links do
    Repo.all(UserLink)
  end

  @doc """
  Gets a single user_link.

  Raises `Ecto.NoResultsError` if the User link does not exist.

  ## Examples

      iex> get_user_link!(123)
      %UserLink{}

      iex> get_user_link!(456)
      ** (Ecto.NoResultsError)

  """
  def get_user_link!(id), do: Repo.get!(UserLink, id)

  @doc """
  Creates a user_link.

  ## Examples

      iex> create_user_link(%{field: value})
      {:ok, %UserLink{}}

      iex> create_user_link(%{field: bad_value})
      {:error, %Ecto.Changeset{}}

  """
  def create_user_link(user, attrs \\ %{}) do
    tag = Repo.get_by(Tag, name: attrs["tag_name"])

    %UserLink{}
    |> UserLink.creation_changeset(attrs, user, tag)
    |> Repo.insert()
  end

  @doc """
  Updates a user_link.

  ## Examples

      iex> update_user_link(user_link, %{field: new_value})
      {:ok, %UserLink{}}

      iex> update_user_link(user_link, %{field: bad_value})
      {:error, %Ecto.Changeset{}}

  """
  def update_user_link(%UserLink{} = user_link, attrs) do
    user_link
    |> UserLink.changeset(attrs)
    |> Repo.update()
  end

  @doc """
  Deletes a UserLink.

  ## Examples

      iex> delete_user_link(user_link)
      {:ok, %UserLink{}}

      iex> delete_user_link(user_link)
      {:error, %Ecto.Changeset{}}

  """
  def delete_user_link(%UserLink{} = user_link) do
    Repo.delete(user_link)
  end

  @doc """
  Returns an `%Ecto.Changeset{}` for tracking user_link changes.

  ## Examples

      iex> change_user_link(user_link)
      %Ecto.Changeset{source: %UserLink{}}

  """
  def change_user_link(%UserLink{} = user_link) do
    UserLink.changeset(user_link, %{})
  end

  def count_user_links(user) do
    if Canada.Can.can?(user, :edit, UserLink) do
      UserLink
      |> where(aasm_state: "unverified")
      |> Repo.aggregate(:count, :id)
    else
      nil
    end
  end
end