module FastRI::Util

# File lib/fastri/util.rb, line 114
def change_query_method_type(query)
  if md = /\A(.*)(#|\.|::)([^#.:]+)\z/.match(query)
    namespace, sep, meth = md.captures
    case sep
    when /::/ then "#{namespace}##{meth}"
    when /#/ then "#{namespace}::#{meth}"
    else 
      query
    end
  else
    query
  end
end

# File lib/fastri/util.rb, line 94
def find_home
  # stolen from RubyGems
  ['HOME', 'USERPROFILE'].each do |homekey|
    return ENV[homekey] if ENV[homekey]
  end
  if ENV['HOMEDRIVE'] && ENV['HOMEPATH']
    return "#{ENV['HOMEDRIVE']}:#{ENV['HOMEPATH']}"
  end
  begin
    File.expand_path("~")
  rescue StandardError => ex
    if File::ALT_SEPARATOR
      "C:/"
    else
      "/"
    end
  end
end

# File lib/fastri/util.rb, line 49
def gem_directories_unique
  return [] unless defined? Gem
  gemdirs = Gem.path.map{|p| Dir["#{p}/doc/*/ri"]}.flatten
  gems = Hash.new{|h,k| h[k] = []}
  gemdirs.each do |path|
    gemname, version = %r{/([^/]+)-([^-]*)/ri$}.match(path).captures
    if gemname.nil? # doesn't follow any conventions :(
      gems[path[%r{/([^/]+)/ri$}, 1]] << [nil, path]
    else
      gems[gemname] << [version, path]
    end
  end
  gems.sort_by{|name, _| name}.map do |name, versions|
    version, path = versions.sort.last
    [name, version, File.expand_path(path)]
  end
end

# File lib/fastri/util.rb, line 70
def gem_info_for_path(path, gem_dir_info = FastRI::Util.gem_directories_unique)
  path = File.expand_path(path)
  matches = gem_dir_info.select{|name, version, gem_path| path.index(gem_path) == 0}
  matches.sort_by{|name, version, gem_path| [gem_path.size, version, name]}.last
end

# File lib/fastri/util.rb, line 79
def gem_relpath_to_full_name(relpath)
  case relpath
  when %r{^(.*)/cdesc-([^/]*)\.yaml$}
    path, name = $~.captures
    (path.split(%r{/})[0..-2] << name).join("::")
  when %r{^(.*)/([^/]*)-(i|c)\.yaml$}
    path, escaped_name, type = $~.captures
    name = RI::RiWriter.external_to_internal(escaped_name)
    sep = ( type == 'c' ) ? "." : "#"
    path.gsub("/", "::") + sep + name
  end
end