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# frozen_string_literal: true
module Gitlab
module Ci
module Interpolation
class Access
attr_reader :content, :errors
MAX_ACCESS_OBJECTS = 5
MAX_ACCESS_BYTESIZE = 1024
def initialize(access, ctx)
@content = access
@ctx = ctx
@errors = []
if objects.count <= 1 # rubocop:disable Style/IfUnlessModifier
@errors.push('invalid interpolation access pattern')
end
if access.bytesize > MAX_ACCESS_BYTESIZE # rubocop:disable Style/IfUnlessModifier
@errors.push('maximum interpolation expression size exceeded')
end
evaluate! if valid?
end
def valid?
errors.none?
end
def objects
@objects ||= @content.split('.', MAX_ACCESS_OBJECTS)
end
def value
raise ArgumentError, 'access path invalid' unless valid?
@value
end
private
def evaluate!
raise ArgumentError, 'access path invalid' unless valid?
@value ||= objects.inject(@ctx) do |memo, value|
key = value.to_sym
break @errors.push("unknown interpolation key: `#{key}`") unless memo.key?(key)
memo.fetch(key)
end
rescue KeyError => e
@errors.push(e)
end
end
end
end
end
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