private static LtiRequest GetLtiContentItemSelectionResponse(string url, string data)
{
// Both links should pass the user's username as a custom parameter
var custom = new Dictionary <string, string> {
{ "username", "$User.username" }
};
// Create a graph with 2 LtiLinks
var graph = new ContentItemSelectionGraph
{
Graph = new List <ContentItem>
{
new LtiLink
{
Custom = custom,
Id = new Uri("https://www.company.com/tool/1"),
MediaType = LtiConstants.LtiLtiLinkMediaType,
Text = "Tool 1",
Title = "Tool 1",
PlacementAdvice = new ContentItemPlacement
{
PresentationDocumentTarget = DocumentTarget.window
}
},
new LtiLink
{
Custom = custom,
Id = new Uri("https://www.company.com/tool/2"),
MediaType = LtiConstants.LtiLtiLinkMediaType,
Text = "Tool 2",
Title = "Tool 2",
PlacementAdvice = new ContentItemPlacement
{
PresentationDocumentTarget = DocumentTarget.iframe
}
}
}
};
// ReSharper disable once UseObjectOrCollectionInitializer
var ltiRequest = new LtiRequest(LtiConstants.ContentItemSelectionLtiMessageType)
{
ConsumerKey = "12345",
Url = new Uri(url)
};
ltiRequest.ContentItems = graph.ToJsonLdString();
ltiRequest.Data = data;
return(ltiRequest);
}
/// <summary>
/// Create an LtiRequestViewModel that contains a ContentItemPlacementResponse.
/// </summary>
/// <param name="url">The content_item_return_url from the content-item message.</param>
/// <param name="consumerKey">The OAuth consumer key to use to sign the request.</param>
/// <param name="consumerSecret">The OAuth consumer secret to use to sign the request.</param>
/// <param name="contentItems">The ContentItemPlacementResponse to send.</param>
/// <param name="data">The data received in the original content-item message.</param>
/// <param name="ltiErrorLog">Optional plain text error message to be logged by the Tool Consumer.</param>
/// <param name="ltiErrorMsg">Optional plain text error message to be displayed by the Tool Consumer.</param>
/// <param name="ltiLog">Optional plain text message to be logged by the Tool Consumer.</param>
/// <param name="ltiMsg">Optional plain text message to be displayed by the Tool Consumer.</param>
/// <returns>The LtiRequestViewModel which contains a signed version of the response.</returns>
public static LtiRequestViewModel CreateContentItemSelectionViewModel(
string url, string consumerKey, string consumerSecret,
ContentItemSelectionGraph contentItems, string data,
string ltiErrorLog, string ltiErrorMsg, string ltiLog, string ltiMsg)
{
var ltiRequest = new LtiRequest(LtiConstants.ContentItemSelectionLtiMessageType)
{
Url = new Uri(url),
ConsumerKey = consumerKey,
ContentItems = contentItems.ToJsonLdString(),
Data = data,
LtiErrorLog = ltiErrorLog,
LtiErrorMsg = ltiErrorMsg,
LtiLog = ltiLog,
LtiMsg = ltiMsg
};
return(ltiRequest.GetViewModel(consumerSecret));
}
