module PendingChangesConcern

# File app/models/concerns/pending_changes_concern.rb, line 37
def apply_pending_changes!
  pending_changes.each { |attr, value| public_send("#{attr}=", value) }
  discard_pending_changes!
end

# File app/models/concerns/pending_changes_concern.rb, line 47
def apply_pending_changes_to_new_record!(changeset:)
  new_record = nil

  ActiveRecord::Base.transaction do
    new_record = dup_for_pending_changes.tap(&:apply_pending_changes!)

    changeset.update!(patient: new_record)

    PDSSearchResult.where(import: changeset.import, patient: self).update_all(
      patient_id: new_record.id
    )
    discard_pending_changes!
  end

  new_record
end

# File app/models/concerns/pending_changes_concern.rb, line 42
def discard_pending_changes!
  self.pending_changes = {}
  save!
end

# File app/models/concerns/pending_changes_concern.rb, line 12
def stage_changes(attributes)
  attributes.each do |attr, new_value|
    current_value = public_send(attr)

    if normalised(new_value) == normalised(current_value)
      public_send("#{attr}=", new_value)
      pending_changes.delete(attr.to_s)
    else
      pending_changes[attr.to_s] = new_value
    end
  end
end

# File app/models/concerns/pending_changes_concern.rb, line 25
def with_pending_changes
  return self if pending_changes.blank?

  # Use `becomes` instead of `dup` or `clone` to preserve loaded associations.
  becomes(self.class).tap do |record|
    record.clear_changes_information
    pending_changes.each do |attr, value|
      record.public_send("#{attr}=", value)
    end
  end
end