article.rb

# == Schema Information
#
# Table name: research_journal_articles
#
#  id                         :uuid             not null, primary key
#  abstract                   :text
#  keywords                   :text
#  old_text                   :text
#  position                   :integer
#  published                  :boolean          default(FALSE)
#  published_at               :date
#  references                 :text
#  slug                       :string
#  title                      :string
#  created_at                 :datetime         not null
#  updated_at                 :datetime         not null
#  research_journal_id        :uuid             not null
#  research_journal_volume_id :uuid
#  university_id              :uuid             not null
#  updated_by_id              :uuid
#
# Indexes
#
#  index_research_journal_articles_on_research_journal_id         (research_journal_id)
#  index_research_journal_articles_on_research_journal_volume_id  (research_journal_volume_id)
#  index_research_journal_articles_on_university_id               (university_id)
#  index_research_journal_articles_on_updated_by_id               (updated_by_id)
#
# Foreign Keys
#
#  fk_rails_...  (research_journal_id => research_journals.id)
#  fk_rails_...  (research_journal_volume_id => research_journal_volumes.id)
#  fk_rails_...  (university_id => universities.id)
#  fk_rails_...  (updated_by_id => users.id)
#
class Research::Journal::Article < ApplicationRecord
  include WithGit
  include WithBlobs
  include WithPosition

  has_rich_text :text
  has_one_attached :pdf

  belongs_to :university
  belongs_to :journal, foreign_key: :research_journal_id
  belongs_to :volume, foreign_key: :research_journal_volume_id, optional: true
  belongs_to :updated_by, class_name: 'User'
  has_and_belongs_to_many :persons,
                          class_name: 'University::Person',
                          join_table: :research_journal_articles_researchers,
                          association_foreign_key: :researcher_id
  has_many :websites, -> { distinct }, through: :journal

  validates :title, presence: true

  before_validation :set_published_at, if: :published_changed?

  scope :published, -> { where(published: true) }

  def git_path(website)
    "content/articles/#{published_at.year}/#{published_at.strftime "%Y-%m-%d"}-#{slug}.html" if (volume.nil? || volume.published_at) && published_at
  end

  def git_dependencies(website)
    [self] +
    other_articles_in_the_volume +
    persons +
    persons.map(&:researcher)
  end

  def to_s
    "#{ title }"
  end

  def path
    "/#{slug}"
  end

  protected

  def other_articles_in_the_volume
    return [] if volume.nil?
    volume.articles.where.not(id: self)
  end

  def last_ordered_element
    Research::Journal::Article.where(
      university_id: university_id,
      research_journal_volume_id: research_journal_volume_id
    ).ordered.last
  end

  def blob_ids
    [pdf&.blob_id]
  end

  def set_published_at
    self.published_at = published? ? Time.zone.now : nil
  end
end