udia

###############################################################################
# The contents of this file are subject to the Common Public Attribution
# License Version 1.0. (the "License"); you may not use this file except in
# compliance with the License. You may obtain a copy of the License at
# https://raw.githubusercontent.com/udia-software/udia/master/LICENSE.
# The License is based on the Mozilla Public License Version 1.1, but
# Sections 14 and 15 have been added to cover use of software over a computer
# network and provide for limited attribution for the Original Developer.
# In addition, Exhibit A has been modified to be consistent with Exhibit B.
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
# the specific language governing rights and limitations under the License.
#
# The Original Code is UDIA.
#
# The Original Developer is the Initial Developer.  The Initial Developer of
# the Original Code is Udia Software Incorporated.
#
# All portions of the code written by UDIA are Copyright (c) 2016-2017
# Udia Software Incorporated. All Rights Reserved.
###############################################################################
defmodule Udia.User do
  use Udia.Web, :model

  schema "users" do
    field :username, :string
    field :password, :string, virtual: true
    field :password_hash, :string
    has_many :nodes, Udia.Node
    has_many :comments, Udia.Comment

    timestamps()
  end

  @doc """
  Builds a changeset based on the `struct` and `params`.
  """
  def changeset(struct, params \\ %{}) do
    struct
    |> cast(params, [:username, :password])
    |> validate_required([:username])
    |> validate_length(:username, min: 1, max: 20)
    |> unique_constraint(:username)
  end

  @doc """
  Builds a changeset for registering a new user.
  """
  def registration_changeset(model, params) do
    model
    |> changeset(params)
    |> cast(params, [:password])
    |> validate_required([:password])
    |> validate_length(:password, min: 6, max: 100)
    |> put_pass_hash()
  end

  defp put_pass_hash(changeset) do
    case changeset do
      %Ecto.Changeset{valid?: true, changes: %{password: pass}} ->
        put_change(changeset, :password_hash, Comeonin.Bcrypt.hashpwsalt(pass))
      _ ->
        changeset
    end
  end
end