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path: root/app/serializers/diff_file_entity.rb
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class DiffFileEntity < Grape::Entity
  include ActionView::Helpers::TagHelper
  include Gitlab::Routing
  include BlobHelper
  include CommitsHelper
  include DiffHelper
  include IconsHelper
  include SubmoduleHelper
  include TreeHelper

  expose :submodule?, as: :submodule

  expose :submodule_link do |diff_file|
    submodule_links(diff_file.blob, diff_file.content_sha, diff_file.repository).first if diff_file.submodule?
  end

  expose :submodule_tree_url do |diff_file|
    submodule_links(diff_file.blob, diff_file.content_sha, diff_file.repository).last if diff_file.submodule?
  end

  expose :blob, using: BlobEntity

  expose :can_modify_blob do |diff_file|
    # todo: this depends on can_collaborate_with_project?, which needs current_user
    # also maybe this should live in current_user like in merge_request entity
    # can_modify_blob?(diff_file.blob, merge_request.project, merge_request.source_branch)
  end

  expose :file_hash do |diff_file|
    Digest::SHA1.hexdigest(diff_file.file_path)
  end

  expose :file_path
  expose :too_large?, as: :too_large
  expose :collapsed?, as: :collapsed
  expose :new_file?, as: :new_file
  expose :deleted_file?, as: :deleted_file
  expose :renamed_file?, as: :renamed_file
  expose :old_path
  expose :new_path
  expose :mode_changed?, as: :mode_changed
  expose :a_mode
  expose :b_mode
  expose :text?, as: :text
  expose :added_lines
  expose :removed_lines
  expose :diff_refs
  expose :content_sha
  expose :stored_externally?, as: :stored_externally
  expose :external_storage

  expose :load_collapsed_diff_url, if: -> (diff_file, options) { diff_file.text? && options[:merge_request] } do |diff_file|
    merge_request = options[:merge_request]
    project = merge_request.source_project

    diff_for_path_namespace_project_merge_request_path(
      namespace_id: project.namespace.to_param,
      project_id: project.to_param,
      id: merge_request.iid,
      old_path: diff_file.old_path,
      new_path: diff_file.new_path,
      file_identifier: diff_file.file_identifier
    )
  end

  expose :formatted_external_url, if: -> (_, options) { options[:environment] } do |diff_file|
    options[:environment].formatted_external_url
  end

  expose :external_url, if: -> (_, options) { options[:environment] } do |diff_file|
    options[:environment].external_url_for(diff_file.content_sha, diff_file.new_path)
  end

  expose :old_path_html do |diff_file|
    old_path = mark_inline_diffs(diff_file.old_path, diff_file.new_path)
    old_path
  end

  expose :new_path_html do |diff_file|
    _, new_path = mark_inline_diffs(diff_file.old_path, diff_file.new_path)
    new_path
  end

  expose :edit_path, if: -> (_, options) { options[:merge_request] } do |diff_file|
    merge_request = options[:merge_request]

    options = merge_request.persisted? ? { from_merge_request_iid: merge_request.iid } : {}

    project_edit_blob_path(merge_request.source_project,
      tree_join(merge_request.source_branch, diff_file.new_path),
      options)
  end

  expose :fork_path, if: -> (_, options) { options[:merge_request] } do |diff_file|
    # copypasted from helper
    # params = edit_blob_fork_params(edit_path)
    # project_forks_path(merge_request.project, namespace_key: request.current_user.namespace.id, continue: params)
  end

  expose :view_path, if: -> (_, options) { options[:merge_request] } do |diff_file|
    merge_request = options[:merge_request]

    project_blob_path(merge_request.source_project, tree_join(diff_file.content_sha, diff_file.new_path))
  end

  expose :replaced_view_path, if: -> (_, options) { options[:merge_request] } do |diff_file|
    image_diff = diff_file.rich_viewer && diff_file.rich_viewer.partial_name == 'image'
    image_replaced = diff_file.old_content_sha && diff_file.old_content_sha != diff_file.content_sha

    merge_request = options[:merge_request]

    project_blob_path(merge_request.source_project, tree_join(diff_file.old_content_sha, diff_file.old_path)) if image_diff && image_replaced
  end

  expose :context_lines_path, if: -> (diff_file, _) { diff_file.text? } do |diff_file|
    project_blob_diff_path(diff_file.repository.project, tree_join(diff_file.content_sha, diff_file.file_path))
  end

  # Used for inline diffs
  expose :highlighted_diff_lines, if: -> (diff_file, _) { diff_file.text? } do |diff_file|
    diff_file.diff_lines_for_serializer
  end

  # Used for parallel diffs
  expose :parallel_diff_lines, if: -> (diff_file, _) { diff_file.text? }
end