From 60a7064a1c6261004b2b8667a6c7cdcf72fee9a3 Mon Sep 17 00:00:00 2001
From: Colin McFadden <cmcfadden@gmail.com>
Date: Mon, 7 May 2018 14:57:07 -0500
Subject: [PATCH] Add support for passing extra resultData back to a consumer. 
 Specifically targetting Canvas

---
 src/ToolProvider/Outcome.php      | 36 +++++++++++++++++++++++++++++--
 src/ToolProvider/ResourceLink.php | 14 ++++++++++++
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/src/ToolProvider/Outcome.php b/src/ToolProvider/Outcome.php
index 77508fd..17c86f0 100644
--- a/src/ToolProvider/Outcome.php
+++ b/src/ToolProvider/Outcome.php
@@ -52,15 +52,23 @@ class Outcome
  */
     private $value = null;
 
+/**
+ * Outcome result data passback.
+ *
+ * @var array $resultData (type=>value)
+ */
+    private $resultData = null;
+
+
 /**
  * Class constructor.
  *
  * @param string $value     Outcome value (optional, default is none)
  */
-    public function __construct($value = null)
+    public function __construct($value = null, $resultData = null)
     {
-
         $this->value = $value;
+        $this->resultData = $resultData;
         $this->language = 'en-US';
         $this->date = gmdate('Y-m-d\TH:i:s\Z', time());
         $this->type = 'decimal';
@@ -91,4 +99,28 @@ public function setValue($value)
 
     }
 
+/**
+ * Get the outcome result data.
+ *
+ * @return array Outcome Result Data (type=>value)
+ */
+    public function getResultData()
+    {
+
+        return $this->resultData;
+
+    }
+
+/**
+ * Set the outcome result data.
+ *
+ * @param array $resultData  Outcome result (type=>value)
+ */
+    public function setResultData($resultData)
+    {
+
+        $this->resultData = $resultData;
+
+    }
+
 }
diff --git a/src/ToolProvider/ResourceLink.php b/src/ToolProvider/ResourceLink.php
index f08f11c..a9afbf0 100644
--- a/src/ToolProvider/ResourceLink.php
+++ b/src/ToolProvider/ResourceLink.php
@@ -591,6 +591,19 @@ public function doOutcomesService($action, $ltiOutcome, $user)
             if ($urlLTI11) {
                 $xml = '';
                 if ($action === self::EXT_WRITE) {
+                    $xmlResultAppend = null;
+                    if($ltiOutcome->getResultData() && is_array($ltiOutcome->getResultData())) {
+                        $resultData = $ltiOutcome->getResultData();
+                        reset($resultData);
+                        $resultKey = key($resultData);
+                        $resultValue = current($resultData);
+                        $xmlResultAppend = <<<EOF
+                        <resultData>
+                            <{$resultKey}>{$resultValue}</{$resultKey}>
+                        </resultData>
+EOF;
+
+                    }
                     $xml = <<<EOF
 
         <result>
@@ -598,6 +611,7 @@ public function doOutcomesService($action, $ltiOutcome, $user)
             <language>{$ltiOutcome->language}</language>
             <textString>{$value}</textString>
           </resultScore>
+          {$xmlResultAppend}
         </result>
 EOF;
                 }