# frozen_string_literal: true

class Gem::RequestSet::Lockfile::Parser
  ###
  # Parses lockfiles

  def initialize(tokenizer, set, platforms, filename = nil)
    @tokens    = tokenizer
    @filename  = filename
    @set       = set
    @platforms = platforms
  end

  def parse
    until @tokens.empty? do
      token = get

      case token.type
      when :section then
        @tokens.skip :newline

        case token.value
        when "DEPENDENCIES" then
          parse_DEPENDENCIES
        when "GIT" then
          parse_GIT
        when "GEM" then
          parse_GEM
        when "PATH" then
          parse_PATH
        when "PLATFORMS" then
          parse_PLATFORMS
        else
          token = get until @tokens.empty? || peek.first == :section
        end
      else
        raise "BUG: unhandled token #{token.type} (#{token.value.inspect}) at line #{token.line} column #{token.column}"
      end
    end
  end

  ##
  # Gets the next token for a Lockfile

  def get(expected_types = nil, expected_value = nil) # :nodoc:
    token = @tokens.shift

    if expected_types && !Array(expected_types).include?(token.type)
      unget token
