module Github::Authorization

def _verify_client # :nodoc:

:nodoc: 
def _verify_client # :nodoc:
  raise ArgumentError, 'Need to provide client_id and client_secret' unless client_id? && client_secret?
end

def auth_code

Strategy token 
def auth_code
  _verify_client
  @client.auth_code
end

def authenticated?

Check whether authentication credentials are present 
def authenticated?
  basic_authed? || oauth_token?
end

def authentication

Select authentication parameters 
def authentication
  if login? && password?
    { :login => login, :password => password }
  elsif basic_auth?
    { :basic_auth => basic_auth }
  else
    { }
  end
end

def authorize_url(params = {})


* gist - write access to gists.
* repo - DB read/write access, and Git read access to public and private repos.
* public_repo - DB read/write access, and Git read access to public repos.
* user - DB read/write access to profile info only.
* (no scope) - public read-only access (includes public user profile info, public repo info, and gists).
Available scopes:
* :scope - Optional string. Comma separated list of scopes.
* :redirect_uri - Required string.
= Parameters
Sends authorization request to GitHub. 
def authorize_url(params = {})
  _verify_client
  @client.auth_code.authorize_url(params)
end

def basic_authed?

Check whether basic authentication credentials are present 
def basic_authed?
  basic_auth? || (login? && password?)
end

def client

Setup OAuth2 instance 
def client
  @client ||= ::OAuth2::Client.new(client_id, client_secret,
    :site          => 'https://github.com',
    :authorize_url => 'login/oauth/authorize',
    :token_url     => 'login/oauth/access_token'
  )
end

def get_token(authorization_code, params = {})

Makes request to token endpoint and retrieves access token value 
def get_token(authorization_code, params = {})
  _verify_client
  @client.auth_code.get_token(authorization_code, params)
end