class Rack::OAuth2::Client

# File lib/rack/oauth2/client.rb, line 8
def initialize(attributes = {})
  (required_attributes + optional_attributes).each do |key|
    self.send :"#{key}=", attributes[key]
  end
  @grant = Grant::ClientCredentials.new
  @authorization_endpoint ||= '/oauth2/authorize'
  @token_endpoint ||= '/oauth2/token'
  attr_missing!
end

# File lib/rack/oauth2/client.rb, line 67
def access_token!(*args)
  headers, params = {}, @grant.as_json

  # NOTE:
  #  Using Array#estract_options! for backward compatibility.
  #  Until v1.0.5, the first argument was 'client_auth_method' in scalar.
  options = args.extract_options!
  client_auth_method = args.first || options.delete(:client_auth_method) || :basic

  params[:scope] = Array(options.delete(:scope)).join(' ') if options[:scope].present?
  params.merge! options

  if secret
    if client_auth_method == :basic
      cred = ["#{identifier}:#{secret}"].pack('m').tr("\n", '')
      headers.merge!(
        'Authorization' => "Basic #{cred}"
      )
    else
      params.merge!(
        client_id: identifier,
        client_secret: secret
      )
    end
  end
  handle_response do
    Rack::OAuth2.http_client.post(
      absolute_uri_for(token_endpoint),
      Util.compact_hash(params),
      headers
    )
  end
end

# File lib/rack/oauth2/client.rb, line 28
def authorization_code=(code)
  @grant = Grant::AuthorizationCode.new(
    code: code,
    redirect_uri: self.redirect_uri
  )
end

# File lib/rack/oauth2/client.rb, line 18
def authorization_uri(params = {})
  params[:response_type] ||= :code
  params[:response_type] = Array(params[:response_type]).join(' ')
  params[:scope] = Array(params[:scope]).join(' ')
  Util.redirect_uri absolute_uri_for(authorization_endpoint), :query, params.merge(
    client_id: self.identifier,
    redirect_uri: self.redirect_uri
  )
end

# File lib/rack/oauth2/client.rb, line 48
def jwt_bearer=(assertion)
  @grant = Grant::JWTBearer.new(
    assertion: assertion
  )
end

# File lib/rack/oauth2/client.rb, line 42
def refresh_token=(token)
  @grant = Grant::RefreshToken.new(
    refresh_token: token
  )
end

# File lib/rack/oauth2/client.rb, line 35
def resource_owner_credentials=(credentials)
  @grant = Grant::Password.new(
    username: credentials.first,
    password: credentials.last
  )
end

# File lib/rack/oauth2/client.rb, line 54
def saml2_bearer=(assertion)
  @grant = Grant::SAML2Bearer.new(
    assertion: assertion
  )
end

# File lib/rack/oauth2/client.rb, line 60
def subject_token=(subject_token, subject_token_type = URN::TokenType::JWT)
  @grant = Grant::TokenExchange.new(
    subject_token: subject_token,
    subject_token_type: subject_token_type
  )
end