Class: LtiProvider::Launch

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/lti_provider/launch.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#lti_errormsg ⇒ Object

Returns the value of attribute lti_errormsg.



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# File 'app/models/lti_provider/launch.rb', line 7

def lti_errormsg
  @lti_errormsg
end

Class Method Details

.initialize_from_request(provider, request) ⇒ Object 



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# File 'app/models/lti_provider/launch.rb', line 11

def self.initialize_from_request(provider, request)
  launch = new

  launch.validate_provider(provider, request)

  launch.provider_params = provider.to_params
  launch.canvas_url      = launch.api_endpoint(provider)
  launch.nonce           = launch.provider_params['oauth_nonce']

  launch
end

.xml_config(lti_launch_url) ⇒ Object 



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# File 'app/models/lti_provider/launch.rb', line 23

def self.xml_config(lti_launch_url)
  tc = IMS::LTI::ToolConfig.new({
    launch_url: lti_launch_url,
    title: LtiProvider::XmlConfig.tool_title,
    description: LtiProvider::XmlConfig.tool_description
  })

  tc.extend IMS::LTI::Extensions::Canvas::ToolConfig
  platform = IMS::LTI::Extensions::Canvas::ToolConfig::PLATFORM

  privacy_level = LtiProvider::XmlConfig.privacy_level || "public"
  tc.send("canvas_privacy_#{privacy_level}!")

  if LtiProvider::XmlConfig.tool_id
    tc.set_ext_param(platform, :tool_id, LtiProvider::XmlConfig.tool_id)
  end

  if LtiProvider::XmlConfig.course_navigation
    tc.canvas_course_navigation!(LtiProvider::XmlConfig.course_navigation.symbolize_keys)
  end

  if LtiProvider::XmlConfig.
    tc.(LtiProvider::XmlConfig..symbolize_keys)
  end

  if LtiProvider::XmlConfig.user_navigation
    tc.canvas_user_navigation!(LtiProvider::XmlConfig.user_navigation.symbolize_keys)
  end

  if LtiProvider::XmlConfig.environments
    tc.set_ext_param(platform, :environments, LtiProvider::XmlConfig.environments.symbolize_keys)
  end

  tc.to_xml(:indent => 2)
end

Instance Method Details

#api_endpoint(provider) ⇒ Object 



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# File 'app/models/lti_provider/launch.rb', line 91

def api_endpoint(provider)
  if provider.launch_presentation_return_url
    uri = URI.parse(provider.launch_presentation_return_url)
    domain = "#{uri.scheme}://#{uri.host}"
    domain += ":#{uri.port}" unless uri.port.nil? || [80, 443].include?(uri.port.to_i)
    return domain
  end
end

#valid_provider? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/lti_provider/launch.rb', line 72

def valid_provider?
  !!@valid_provider
end

#validate_provider(provider, request) ⇒ Object 



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# File 'app/models/lti_provider/launch.rb', line 76

def validate_provider(provider, request)
  self.lti_errormsg =
    if provider.consumer_key.blank?
      "Consumer key not provided."
    elsif provider.consumer_secret.blank?
      "Consumer secret not configured on provider."
    elsif !provider.valid_request?(request)
      "The OAuth signature was invalid."
    elsif oauth_timestamp_too_old?(provider.request_oauth_timestamp)
      "Your request is too old."
    end

  @valid_provider = self.lti_errormsg.blank?
end