debian-mirror-gitlab/lib/gitlab/view/presenter/base.rb

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# frozen_string_literal: true
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module Gitlab
module View
module Presenter
CannotOverrideMethodError = Class.new(StandardError)
module Base
extend ActiveSupport::Concern
include Gitlab::Routing
include Gitlab::Allowable
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# Presenters should always access the subject through an explicit getter defined with
# `presents ..., as:`, the `__subject__` method is only intended for internal use.
def __subject__
@subject
end
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def can?(user, action, overridden_subject = nil)
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super(user, action, overridden_subject || __subject__)
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end
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# delegate all #can? queries to the subject
def declarative_policy_delegate
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__subject__
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end
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def present(**attributes)
self
end
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def url_builder
Gitlab::UrlBuilder.instance
end
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def is_a?(type)
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super || __subject__.is_a?(type)
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end
def web_url
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url_builder.build(__subject__)
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end
def web_path
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url_builder.build(__subject__, only_path: true)
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end
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def path_with_line_numbers(path, start_line, end_line)
path.tap do |complete_path|
complete_path << "#L#{start_line}"
complete_path << "-#{end_line}" if end_line && end_line != start_line
end
end
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class_methods do
def presenter?
true
end
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def presents(*target_classes, as: nil)
if target_classes.any? { |k| k.is_a?(Symbol) }
raise ArgumentError, "Unsupported target class type: #{target_classes}."
end
if self < ::Gitlab::View::Presenter::Delegated
target_classes.each { |k| delegator_target(k) }
elsif self < ::Gitlab::View::Presenter::Simple
# no-op
end
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define_method(as) { __subject__ } if as
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end
end
end
end
end
end