class Cucumber::Filter

def accept?(syntax_node)
  at_line?(syntax_node) &&
  matches_tags?(syntax_node) &&
  matches_names?(syntax_node)
end

def accept_example?(syntax_node, outline)
  (at_line?(syntax_node) || outline_at_line?(outline)) &&
  (matches_names?(syntax_node) || outline_matches_names?(outline))
end

def at_line?(syntax_node)
  @lines.nil? || @lines.empty? || @lines.detect{|line| syntax_node.at_line?(line)}
end

def excluded_by_tags?(syntax_node)
  @exclude_tags.any? && syntax_node.has_tags?(@exclude_tags)
end

def included_by_tags?(syntax_node)
  @include_tags.empty? || syntax_node.has_all_tags?(@include_tags)
end

def initialize(lines, options)
  @lines = lines
  @include_tags = options[:include_tags] ? options[:include_tags].keys : []
  @exclude_tags = options[:exclude_tags] ? options[:exclude_tags].keys : []
  @name_regexps = options[:name_regexps] || []
end

def matches_names?(syntax_node)
  @name_regexps.nil? || @name_regexps.empty? || @name_regexps.detect{|name_regexp| syntax_node.matches_name?(name_regexp)}
end

def matches_tags?(syntax_node)
  !excluded_by_tags?(syntax_node) &&
  included_by_tags?(syntax_node)
end

def outline_at_line?(syntax_node)
   @lines.nil? || @lines.empty? || @lines.detect{|line| syntax_node.outline_at_line?(line)}
end

def outline_matches_names?(syntax_node)
  @name_regexps.nil? || @name_regexps.empty? || @name_regexps.detect{|name_regexp| syntax_node.outline_matches_name?(name_regexp)}
end