class Coppertone::MacroString::MacroParser

A internal class that parses the macro string template into an object that can later be evaluated (or 'expanded') in the context of a particular SPF check.

Constants

SIMPLE_MACRO_LETTERS

Attributes

macros[R]

Public Class Methods

new(s) click to toggle source
# File lib/coppertone/macro_string/macro_parser.rb, line 13
def initialize(s)
  @s = s.dup
  @macros = []
  parse_macro_array
end

Public Instance Methods

parse_contextual_interpolated_macro() click to toggle source
# File lib/coppertone/macro_string/macro_parser.rb, line 33
def parse_contextual_interpolated_macro
  raise MacroStringParsingError unless @s[1] == '{'

  closing_index = @s.index('}')
  raise MacroStringParsingError unless closing_index

  interpolated_body = @s[2, closing_index - 2]
  @macros << MacroExpand.new(interpolated_body)
  @s = @s[(closing_index + 1)..]
end
parse_interpolated_macro() click to toggle source
# File lib/coppertone/macro_string/macro_parser.rb, line 45
def parse_interpolated_macro
  raise MacroStringParsingError if @s.length == 1

  macro_code = @s[0, 2]
  if MacroStaticExpand.exists_for?(macro_code)
    @macros << MacroStaticExpand.macro_for(macro_code)
    @s = @s[2..]
  else
    parse_contextual_interpolated_macro
  end
end
parse_macro_array() click to toggle source
# File lib/coppertone/macro_string/macro_parser.rb, line 19
def parse_macro_array
  while @s && !@s.empty?
    if starting_macro?
      parse_interpolated_macro
    else
      parse_macro_literal
    end
  end
end
parse_macro_literal() click to toggle source
# File lib/coppertone/macro_string/macro_parser.rb, line 57
def parse_macro_literal
  new_idx = @s.index('%')
  new_idx ||= @s.length
  @macros << MacroLiteral.new(@s[0, new_idx])
  @s = @s[new_idx..]
  new_idx
end
starting_macro?() click to toggle source
# File lib/coppertone/macro_string/macro_parser.rb, line 29
def starting_macro?
  @s && @s.length >= 1 && (@s[0] == '%')
end