Class: AtomicLti::Services::PlatformNotifications

Inherits:
Base
  • Object
show all
Defined in:
app/lib/atomic_lti/services/platform_notifications.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#get_next_url, #headers, #initialize, #logged_service_call, #service_delete, #service_get, #service_post, #service_put

Constructor Details

This class inherits a constructor from AtomicLti::Services::Base

Class Method Details

.enabled?(id_token_decoded) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/lib/atomic_lti/services/platform_notifications.rb', line 21

def self.enabled?(id_token_decoded)
  return false unless id_token_decoded&.dig(AtomicLti::Definitions::PLATFORM_NOTIFICATION_SERVICE_CLAIM)

  (AtomicLti::Definitions::PLATFORM_NOTIFICATION_SERVICE_VERSIONS &
    (id_token_decoded.dig(AtomicLti::Definitions::PLATFORM_NOTIFICATION_SERVICE_CLAIM, "service_versions") || [])).present?
end

.validate_notification(notification) ⇒ Object

Raises:



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# File 'app/lib/atomic_lti/services/platform_notifications.rb', line 49

def self.validate_notification(notification)
  decoded_token = AtomicLti::Authorization.validate_token(notification)
  if decoded_token.blank?
    raise AtomicLti::Exceptions::InvalidPlatformNotification
  end

  errors = []

  if decoded_token["iss"].blank?
    errors.push("LTI token is missing required field iss")
  end

  if decoded_token["aud"].blank?
    errors.push("LTI token is missing required field aud")
  end

  if decoded_token["aud"].is_a?(Array) && decoded_token["aud"].length > 1
    # OpenID Connect spec specifies the AZP should exist and be an AUD
    if decoded_token["azp"].blank?
      errors.push("LTI token has multiple aud and is missing required field azp")
    elsif decoded_token["aud"].exclude?(decoded_token["azp"])
      errors.push("LTI token azp is not one of the aud's")
    end
  end

  if decoded_token[AtomicLti::Definitions::DEPLOYMENT_ID].blank?
    errors.push(
      "LTI token is missing required field #{AtomicLti::Definitions::DEPLOYMENT_ID}",
    )
  end

  if decoded_token[AtomicLti::Definitions::NOTICE_CLAIM].blank?
    errors.push(
      "LTI token is missing required claim #{AtomicLti::Definitions::NOTICE_CLAIM}",
    )
  end

  if errors.present?
    raise Exceptions::InvalidPlatformNotification.new(errors.join(" "))
  end

  if decoded_token[AtomicLti::Definitions::LTI_VERSION].blank?
    raise AtomicLti::Exceptions::NoLTIVersion
  end

  raise AtomicLti::Exceptions::InvalidLTIVersion unless AtomicLti::Lti.valid_version?(decoded_token)

  decoded_token
end

Instance Method Details

#endpoint ⇒ Object

Raises:



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# File 'app/lib/atomic_lti/services/platform_notifications.rb', line 8

def endpoint
  url = @id_token_decoded.dig(AtomicLti::Definitions::PLATFORM_NOTIFICATION_SERVICE_CLAIM, "platform_notification_service_url")
  raise AtomicLti::Exceptions::PlatformNotificationsError, "Unable to access platform notifications" if url.blank?

  url
end

#get(query: {}) ⇒ Object

Get platform notifications



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# File 'app/lib/atomic_lti/services/platform_notifications.rb', line 33

def get(query: {})
  uri = Addressable::URI.parse(endpoint)
  uri.query_values = (uri.query_values || {}).merge(query)
  url = uri.to_str

  response, = service_get(url, headers:)
  response.parsed_response
end

#scopes ⇒ Object 



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# File 'app/lib/atomic_lti/services/platform_notifications.rb', line 4

def scopes
  [AtomicLti::Definitions::PNS_SCOPE_NOTICEHANDLERS]
end

#update(notice_type, handler) ⇒ Object 



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# File 'app/lib/atomic_lti/services/platform_notifications.rb', line 42

def update(notice_type, handler)
  content_type = { "Content-Type" => "application/json" }
  payload = { notice_type:, handler: }
  response, = service_put(endpoint, body: JSON.dump(payload), headers: headers(content_type))
  response
end

#url_for(query = nil) ⇒ Object 



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# File 'app/lib/atomic_lti/services/platform_notifications.rb', line 15

def url_for(query = nil)
  url = endpoint.dup
  url << "?#{query}" if query.present?
  url
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/lib/atomic_lti/services/platform_notifications.rb', line 28

def valid?
  self.class.enabled?(@id_token_decoded)
end