106 lines
2.7 KiB
Ruby
106 lines
2.7 KiB
Ruby
# frozen_string_literal: true
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# Extending this module will give you the ability of defining
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# enum values in a declarative way.
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#
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# module DismissalReasons
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# extend DeclarativeEnum
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#
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# key :dismissal_reason
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# name 'DismissalReasonOfVulnerability'
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#
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# description <<~TEXT
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# This enum holds the user selected dismissal reason
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# when they are dismissing the vulnerabilities
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# TEXT
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#
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# define do
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# acceptable_risk value: 0, description: 'The vulnerability is known but is considered to be an acceptable business risk.'
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# false_positive value: 1, description: 'An error in reporting the presence of a vulnerability in a system when the vulnerability is not present.'
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# used_in_tests value: 2, description: 'The finding is not a vulnerability because it is part of a test or is test data.'
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# end
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#
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# Then we can use this module to register enums for our Active Record models like so,
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#
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# class VulnerabilityFeedback
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# declarative_enum DismissalReasons
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# end
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#
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# Also we can use this module to create GraphQL Enum types like so,
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#
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# module Types
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# module Vulnerabilities
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# class DismissalReasonEnum < BaseEnum
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# declarative_enum DismissalReasons
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# end
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# end
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# end
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#
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# rubocop:disable Gitlab/ModuleWithInstanceVariables
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module DeclarativeEnum
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# This `prepended` hook will merge the enum definition
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# of the prepended module into the base module to be
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# used by `prepend_mod_with` helper method.
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def prepended(base)
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base.definition.merge!(definition)
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end
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def key(new_key = nil)
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@key = new_key if new_key
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@key
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end
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def name(new_name = nil)
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@name = new_name if new_name
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@name
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end
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def description(new_description = nil)
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@description = new_description if new_description
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@description
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end
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def define(&block)
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raise LocalJumpError, 'No block given' unless block
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@definition = Builder.new(definition, block).build
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end
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# We can use this method later to apply some sanity checks
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# but for now, returning a Hash without any check is enough.
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def definition
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@definition.to_h
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end
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class Builder
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KeyCollisionError = Class.new(StandardError)
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def initialize(definition, block)
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@definition = definition
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@block = block
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end
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def build
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instance_exec(&@block)
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@definition
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end
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private
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def method_missing(name, *arguments, value: nil, description: nil, &block)
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key = name.downcase.to_sym
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raise KeyCollisionError, "'#{key}' collides with an existing enum key!" if @definition[key]
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@definition[key] = {
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value: value,
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description: description
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}
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end
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end
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end
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# rubocop:enable Gitlab/ModuleWithInstanceVariables
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