consul/consul

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app/models/document.rb

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class Document < ApplicationRecord
  include Attachable

  belongs_to :user
  belongs_to :documentable, polymorphic: true, touch: true

  validates :title, presence: true
  validates :user_id, presence: true
  validates :documentable_id, presence: true,         if: -> { persisted? }
  validates :documentable_type, presence: true,       if: -> { persisted? }

  before_save :remove_metadata

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

  def self.humanized_accepted_content_types
    Setting.accepted_content_types_for("documents").join(", ")
  end

  def humanized_content_type
    attachment_content_type.split("/").last.upcase
  end

  def max_file_size
    documentable_class.max_file_size
  end

  def accepted_content_types
    documentable_class.accepted_content_types
  end

  private

    def association_name
      :documentable
    end

    def documentable_class
      association_class
    end

    def remove_metadata
      return unless attachment.attached?

      attachment_path = ActiveStorage::Blob.service.path_for(attachment.key)
      Exiftool.new(attachment_path, "-all:all=")
    rescue Exiftool::ExiftoolNotInstalled, Exiftool::NoSuchFile
      nil
    end
end