files_in_google_cloud_folder.rb

# gem 'google-api-client', '~> 0.7.1', require: 'google/api_client'

require 'rubygems'
require 'bundler/setup'

require 'google/api_client'
require 'google/api_client/client_secrets'
require 'google/api_client/auth/installed_app'
require 'google/api_client/auth/file_storage'


SCOPES = [
  'https://www.googleapis.com/auth/drive',
  'https://www.googleapis.com/auth/drive.file',
  'https://www.googleapis.com/auth/drive.readonly',
  'https://www.googleapis.com/auth/drive.metadata.readonly',
  'https://www.googleapis.com/auth/drive.appdata',
  'https://www.googleapis.com/auth/userinfo.email',
  'https://www.googleapis.com/auth/userinfo.profile'
]

client = Google::APIClient.new(
  :application_name => 'osea',
  :application_version => '0.0.1'
)

client_secrets = Google::APIClient::ClientSecrets.load

credential_storage = Google::APIClient::FileStorage.new "secrets.data"

unless credential_storage.authorization

  flow = Google::APIClient::InstalledAppFlow.new(
    :client_id => client_secrets.client_id,
    :client_secret => client_secrets.client_secret,
    :scope => SCOPES
  )

  client.authorization = flow.authorize(credential_storage)
else
  client.authorization = credential_storage.authorization
end

# help.

def print_files_in_folder(client, folder_id)

  drive = client.discovered_api('drive', 'v2')
  page_token = nil
  begin
    parameters = {'folderId' => folder_id}
    if page_token.to_s != ''
      parameters['pageToken'] = page_token
    end
    result = client.execute(
      :api_method => drive.children.list,
      :parameters => parameters)

    puts result.status

    if result.status == 200
      children = result.data
      children.items.each do |child|
        puts "File Id: #{child.id}"
      end
      page_token = children.next_page_token
    else
      puts "An error occurred: #{result.data['error']['message']}"
      page_token = nil
    end
  end while page_token.to_s != ''
end

# /help.

# print_files_in_folder client, "root"

# exit
drive = client.discovered_api('drive', 'v2')
parameters = {'folderId' => 'root'}

result = client.execute(:api_method => drive.children.list, :parameters => parameters)

# puts result.data.inspect

children = result.data

children.items.each do |child|
  puts "File Id: #{child.id}"

  result = client.execute(:api_method => drive.files.get, :parameters => {'fileId' => child.id})
  if result.status == 200
    file = result.data
    puts "\tTitle: #{file.title}"
  else
    puts "An error occured: #{result.data['error']['message']}"
  end

end