From b366e112ff0b896ba9c2b2f1777f371dac2b6181 Mon Sep 17 00:00:00 2001
From: Matthew Buckett <matthew.buckett@ctl.ox.ac.uk>
Date: Mon, 2 Feb 2026 15:49:56 +0000
Subject: [PATCH] Expose the ltiContextId

This isn't currently documented on https://canvas.instructure.com/doc/api/assignments.html

It returns the ID that is returned in the "https://purl.imsglobal.org/spec/lti/claim/resource_link" -> "id" claim.
---
 .../edu/ksu/canvas/model/assignment/Assignment.java   | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/main/java/edu/ksu/canvas/model/assignment/Assignment.java b/src/main/java/edu/ksu/canvas/model/assignment/Assignment.java
index 50d0ba35..e2953c66 100644
--- a/src/main/java/edu/ksu/canvas/model/assignment/Assignment.java
+++ b/src/main/java/edu/ksu/canvas/model/assignment/Assignment.java
@@ -60,6 +60,9 @@ public class Assignment extends BaseCanvasModel implements Serializable{
     private List<String> assignmentVisibility;
     private Boolean postManually;
     private Boolean hideInGradebook;
+    // This isn't documented, but returns the LTI resource link ID when the assignment is an LTI assignment.
+    // This is useful for matching assignments to LTI Launches from deep linked assignments.
+    private String ltiContextId;
 
     public Integer getId() {
         return id;
@@ -437,6 +440,14 @@ public void setHideInGradebook(Boolean hideInGradebook) {
         this.hideInGradebook = hideInGradebook;
     }
 
+    public String getLtiContextId() {
+        return ltiContextId;
+    }
+
+    public void setLtiContextId(String ltiContextId) {
+        this.ltiContextId = ltiContextId;
+    }
+
     public class ExternalToolTagAttribute implements Serializable {
         private static final long serialVersionUID = 1L;