Contents

require 'hanami/utils/hash'

module Hanami
  module Helpers
    module FormHelper
      # Values from params and form helpers.
      #
      # It's responsible to populate input values with data coming from params
      # and inline values specified via form helpers like `text_field`.
      #
      # @since 0.2.0
      # @api private
      class Values
        # @since 0.2.0
        # @api private
        GET_SEPARATOR = '.'.freeze

        # @since 0.2.0
        # @api private
        def initialize(values, params)
          @values = Utils::Hash.new(values || {}).symbolize!
          @params = params
        end

        # Returns the value (if present) for the given key.
        # Nested values are expressed with an array if symbols.
        #
        # @since 0.2.0
        # @api private
        def get(*keys)
          _get_from_params(*keys) || _get_from_values(*keys)
        end

        private

        # @since 0.5.0
        # @api private
        def _get_from_params(*keys)
          keys.map! { |key| key.to_s =~ /\A\d+\z/ ? key.to_s.to_i : key }
          @params.dig(*keys)
        end

        # @since 0.2.0
        # @api private
        def _get_from_values(*keys)
          head, *tail = *keys
          result      = @values[head]

          tail.each do |k|
            break if result.nil?
            result = _dig(result, k)
          end

          result
        end

        # @since 1.0.0
        # @api private
        def _dig(base, key)
          case base
          when Utils::Hash, ::Hash        then base[key]
          when Array                      then base[key.to_s.to_i]
          when ->(r) { r.respond_to?(key) } then base.public_send(key)
          end
        end
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
hanami-helpers-1.0.0	lib/hanami/helpers/form_helper/values.rb