class Bundler::Fetcher::Dependency

def api_fetcher?
  true
end

def available?
  fetch_uri.scheme != "file" && downloader.fetch(dependency_api_uri)
rescue NetworkDownError => e
  raise HTTPError, e.message
rescue AuthenticationRequiredError
  # We got a 401 from the server. Just fail.
  raise
rescue HTTPError
  false
end

def dependency_api_uri(gem_names = [])
  uri = fetch_uri + "api/v1/dependencies"
  uri.query = "gems=#{CGI.escape(gem_names.join(","))}" if gem_names.any?
  uri
end

def dependency_specs(gem_names)
  Bundler.ui.debug "Query Gemcutter Dependency Endpoint API: #{gem_names.join(",")}"
  gem_list = unmarshalled_dep_gems(gem_names)
  get_formatted_specs_and_deps(gem_list)
end

def get_formatted_specs_and_deps(gem_list)
  deps_list = []
  spec_list = []
  gem_list.each do |s|
    deps_list.push(*s[:dependencies].map(&:first))
    deps = s[:dependencies].map {|n, d| [n, d.split(", ")] }
    spec_list.push([s[:name], s[:number], s[:platform], deps])
  end
  [spec_list, deps_list]
end

def log_specs(query_list)
  # only display the message on the first run
  if Bundler.ui.debug?
    Bundler.ui.debug "Query List: #{query_list.inspect}"
  else
    Bundler.ui.info ".", false
  end
end

def specs(gem_names, full_dependency_list = [], last_spec_list = [])
  query_list = gem_names.uniq - full_dependency_list
  log_specs(query_list)
  return last_spec_list if query_list.empty?
  spec_list, deps_list = Bundler::Retry.new("dependency api", FAIL_ERRORS).attempts do
    dependency_specs(query_list)
  end
  returned_gems = spec_list.map(&:first).uniq
  specs(deps_list, full_dependency_list + returned_gems, spec_list + last_spec_list)
rescue HTTPError, MarshalError, GemspecError
  Bundler.ui.info "" unless Bundler.ui.debug? # new line now that the dots are over
  Bundler.ui.debug "could not fetch from the dependency API, trying the full index"
  nil
end

def unmarshalled_dep_gems(gem_names)
  gem_list = []
  gem_names.each_slice(Source::Rubygems::API_REQUEST_SIZE) do |names|
    marshalled_deps = downloader.fetch(dependency_api_uri(names)).body
    gem_list.push(*Bundler.load_marshal(marshalled_deps))
  end
  gem_list
end