class Liquid::Variable

# File lib/liquid/variable.rb, line 25
def initialize(markup, parse_context)
  @markup  = markup
  @name    = nil
  @parse_context = parse_context
  @line_number = parse_context.line_number

  parse_with_selected_parser(markup)
end

# File lib/liquid/variable.rb, line 42
def lax_parse(markup)
  @filters = []
  return unless markup =~ MarkupWithQuotedFragment

  name_markup = $1
  filter_markup = $2
  @name = Expression.parse(name_markup)
  if filter_markup =~ FilterMarkupRegex
    filters = $1.scan(FilterParser)
    filters.each do |f|
      next unless f =~ /\w+/
      filtername = Regexp.last_match(0)
      filterargs = f.scan(FilterArgsRegex).flatten
      @filters << parse_filter_expressions(filtername, filterargs)
    end
  end
end

# File lib/liquid/variable.rb, line 38
def markup_context(markup)
  "in \"{{#{markup}}}\""
end

# File lib/liquid/variable.rb, line 73
def parse_filterargs(p)
  # first argument
  filterargs = [p.argument]
  # followed by comma separated others
  filterargs << p.argument while p.consume?(:comma)
  filterargs
end

# File lib/liquid/variable.rb, line 34
def raw
  @markup
end

# File lib/liquid/variable.rb, line 81
def render(context)
  obj = @filters.inject(context.evaluate(@name)) do |output, (filter_name, filter_args, filter_kwargs)|
    filter_args = evaluate_filter_expressions(context, filter_args, filter_kwargs)
    context.invoke(filter_name, output, *filter_args)
  end

  context.apply_global_filter(obj)
end

# File lib/liquid/variable.rb, line 60
def strict_parse(markup)
  @filters = []
  p = Parser.new(markup)

  @name = Expression.parse(p.expression)
  while p.consume?(:pipe)
    filtername = p.consume(:id)
    filterargs = p.consume?(:colon) ? parse_filterargs(p) : []
    @filters << parse_filter_expressions(filtername, filterargs)
  end
  p.consume(:end_of_string)
end

# File lib/liquid/variable.rb, line 107
def evaluate_filter_expressions(context, filter_args, filter_kwargs)
  parsed_args = filter_args.map{ |expr| context.evaluate(expr) }
  if filter_kwargs
    parsed_kwargs = {}
    filter_kwargs.each do |key, expr|
      parsed_kwargs[key] = context.evaluate(expr)
    end
    parsed_args << parsed_kwargs
  end
  parsed_args
end

# File lib/liquid/variable.rb, line 92
def parse_filter_expressions(filter_name, unparsed_args)
  filter_args = []
  keyword_args = {}
  unparsed_args.each do |a|
    if matches = a.match(JustTagAttributes)
      keyword_args[matches[1]] = Expression.parse(matches[2])
    else
      filter_args << Expression.parse(a)
    end
  end
  result = [filter_name, filter_args]
  result << keyword_args unless keyword_args.empty?
  result
end