class Rack::QueryParser

# File lib/rack/query_parser.rb, line 30
def self.make_default(param_depth_limit)
  new Params, param_depth_limit
end

# File lib/rack/query_parser.rb, line 36
def initialize(params_class, param_depth_limit)
  @params_class = params_class
  @param_depth_limit = param_depth_limit
end

# File lib/rack/query_parser.rb, line 166
def make_params
  @params_class.new
end

# File lib/rack/query_parser.rb, line 170
def new_depth_limit(param_depth_limit)
  self.class.new @params_class, param_depth_limit
end

# File lib/rack/query_parser.rb, line 94
def normalize_params(params, name, v, _depth=nil)
  _normalize_params(params, name, v, 0)
end

# File lib/rack/query_parser.rb, line 73
def parse_nested_query(qs, separator = nil)
  params = make_params

  unless qs.nil? || qs.empty?
    (qs || '').split(separator ? (COMMON_SEP[separator] || /[#{separator}] */n) : DEFAULT_SEP).each do |p|
      k, v = p.split('=', 2).map! { |s| unescape(s) }

      _normalize_params(params, k, v, 0)
    end
  end

  return params.to_h
rescue ArgumentError => e
  raise InvalidParameterError, e.message, e.backtrace
end

# File lib/rack/query_parser.rb, line 45
def parse_query(qs, separator = nil, &unescaper)
  unescaper ||= method(:unescape)

  params = make_params

  (qs || '').split(separator ? (COMMON_SEP[separator] || /[#{separator}] */n) : DEFAULT_SEP).each do |p|
    next if p.empty?
    k, v = p.split('=', 2).map!(&unescaper)

    if cur = params[k]
      if cur.class == Array
        params[k] << v
      else
        params[k] = [cur, v]
      end
    else
      params[k] = v
    end
  end

  return params.to_h
end