76 lines
2.0 KiB
Ruby
76 lines
2.0 KiB
Ruby
# frozen_string_literal: true
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require "dry/schema/predicate_registry"
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require "dry/validation/contract"
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module Dry
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module Validation
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# Predicate registry with additional needed methods.
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class PredicateRegistry < Schema::PredicateRegistry
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# List of predicates to be imported by `:predicates_as_macros`
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# extension.
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#
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# @see Dry::Validation::Contract
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WHITELIST = %i[
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filled? format? gt? gteq? included_in? includes? inclusion? is? lt?
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lteq? max_size? min_size? not_eql? odd? respond_to? size? true?
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uuid_v4?
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].freeze
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# @api private
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def arg_names(name)
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arg_list(name).map(&:first)
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end
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# @api private
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def call(name, args)
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self[name].(*args)
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end
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# @api private
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def message_opts(name, arg_values)
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arg_names(name).zip(arg_values).to_h
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end
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end
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# Extension to use dry-logic predicates as macros.
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#
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# @see Dry::Validation::PredicateRegistry::WHITELIST Available predicates
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#
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# @example
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# Dry::Validation.load_extensions(:predicates_as_macros)
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#
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# class ApplicationContract < Dry::Validation::Contract
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# import_predicates_as_macros
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# end
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#
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# class AgeContract < ApplicationContract
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# schema do
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# required(:age).filled(:integer)
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# end
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#
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# rule(:age).validate(gteq?: 18)
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# end
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#
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# AgeContract.new.(age: 17).errors.first.text
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# # => 'must be greater than or equal to 18'
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#
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# @api public
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class Contract
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# Make macros available for self and its descendants.
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def self.import_predicates_as_macros
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registry = PredicateRegistry.new
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PredicateRegistry::WHITELIST.each do |name|
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register_macro(name) do |macro:|
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predicate_args = [*macro.args, value]
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message_opts = registry.message_opts(name, predicate_args)
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key.failure(name, message_opts) unless registry.(name, predicate_args)
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end
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end
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end
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end
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end
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end
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