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# frozen_string_literal: true
require "refinements/struct"
module Marameters
# Builds the primary argument categories based on method parameters and arguments.
class Categorizer
using Refinements::Struct
def initialize parameters, model: Splat
@parameters = parameters
@model = model
end
def call arguments
@record = model.new
map arguments.is_a?(Array) ? arguments : [arguments]
record
end
private
attr_reader :parameters, :model, :record
def map arguments
return record if arguments.empty?
size = arguments.size
parameters.each.with_index do |pair, index|
filter pair, arguments[index] if index < size
end
end
def filter pair, value
case pair
in [:rest] | [:rest, :*] then splat_positional value
in [:keyrest] | [:keyrest, :**] then record.keywords = Hash value
in [:req, *] | [:opt, *] then record.positionals.append value
in [:rest, *] then record.positionals.append(*value)
in [:nokey] then nil
in [:keyreq, *] | [:key, *] then record.keywords.merge! value if value
in [:keyrest, *] then record.keywords.merge!(**value) if value
in [:block, *] then record.block = value
else fail ArgumentError, "Invalid parameter kind: #{pair.first.inspect}."
end
rescue TypeError
raise TypeError, "#{value.inspect} is an invalid #{pair.first.inspect} value."
end
def splat_positional value
return unless value
record.positionals = value.is_a?(Array) ? value : [value]
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems