Contents

require_relative 'parser/utils'

module Decanter
  module Parser
    class << self
      include Utils

      def parsers_for(klass_or_syms)
        Array.wrap(klass_or_syms)
             .map { |klass_or_sym| klass_or_sym_to_str(klass_or_sym) }
             .map { |parser_str|   parser_constantize(parser_str) }
             .map { |parser|       expand(parser) }
             .flatten
      end

      # Composes multiple parsers into a single parser
      def compose_parsers(parsers)
        raise ArgumentError.new('expects an array') unless parsers.is_a? Array
        composed_parser = Class.new(Decanter::Parser::ComposeParser)
        composed_parser.parsers(parsers)
        composed_parser
      end

      private

      # convert from a class or symbol to a string and concat 'Parser'
      def klass_or_sym_to_str(klass_or_sym)
        case klass_or_sym
        when Class
          klass_or_sym.name
        when Symbol
          symbol_to_string(klass_or_sym)
        else
          raise ArgumentError.new("cannot lookup parser for #{klass_or_sym} with class #{klass_or_sym.class}")
        end.concat('Parser')
      end

      # convert from a string to a constant
      def parser_constantize(parser_str)
        # safe_constantize returns nil if match not found
        parser_str.safe_constantize ||
          concat_str(parser_str).safe_constantize ||
          raise(NameError.new("cannot find parser #{parser_str}"))
      end

      # expand to include preparsers
      def expand(parser)
        Parser.parsers_for(parser.preparsers).push(parser)
      end
    end
  end
end

require "#{File.dirname(__FILE__)}/parser/core.rb"
require "#{File.dirname(__FILE__)}/parser/base.rb"
require "#{File.dirname(__FILE__)}/parser/value_parser.rb"
require "#{File.dirname(__FILE__)}/parser/hash_parser.rb"
Dir["#{File.dirname(__FILE__)}/parser/*_parser.rb"].each { |f| require f }

Version data entries

19 entries across 19 versions & 1 rubygems

Version	Path
decanter-4.0.4	lib/decanter/parser.rb
decanter-4.0.3	lib/decanter/parser.rb
decanter-4.0.2	lib/decanter/parser.rb
decanter-4.0.1	lib/decanter/parser.rb
decanter-4.0.0	lib/decanter/parser.rb
decanter-3.6.0	lib/decanter/parser.rb
decanter-3.5.1	lib/decanter/parser.rb
decanter-3.5.0	lib/decanter/parser.rb
decanter-3.4.2	lib/decanter/parser.rb
decanter-3.4.1	lib/decanter/parser.rb
decanter-3.4.0	lib/decanter/parser.rb
decanter-3.3.0	lib/decanter/parser.rb
decanter-3.2.1	lib/decanter/parser.rb
decanter-3.2.0	lib/decanter/parser.rb
decanter-3.1.2	lib/decanter/parser.rb
decanter-3.1.1	lib/decanter/parser.rb
decanter-3.1.0	lib/decanter/parser.rb
decanter-3.0.1	lib/decanter/parser.rb
decanter-3.0.0	lib/decanter/parser.rb