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Contents
# frozen_string_literal: true
class Serega
module SeregaPlugins
module Metadata
class MetaAttribute
#
# Validator for meta_attribute block parameter
#
class CheckBlock
ALLOWED_PARAM_TYPES = %i[opt req]
private_constant :ALLOWED_PARAM_TYPES
class << self
#
# Checks block provided with attribute
# Block must have up to two arguments - object and context.
# It should not have any *rest or **key arguments
#
# @example without arguments
# metadata(:version) { CONSTANT_VERSION }
#
# @example with one argument
# metadata(:paging) { |scope| { { page: scope.page, per_page: scope.per_page, total_count: scope.total_count } }
#
# @example with two arguments
# metadata(:paging) { |scope, context| { { ... } if context[:with_paging] }
#
# @param block [Proc] Block that returns serialized meta attribute value
#
# @raise [SeregaError] SeregaError that block has invalid arguments
#
# @return [void]
#
def call(block)
raise SeregaError, "Block must be provided when defining meta attribute" unless block
params = block.parameters
return if (params.count <= 2) && params.all? { |par| ALLOWED_PARAM_TYPES.include?(par[0]) }
raise SeregaError, "Block can have maximum 2 regular parameters (no **keyword or *array args)"
end
end
end
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems