MDL-70287 core_payment: Redirect user to the successurl after payment

enrol/fee/classes/plugin.php

@@ -212,6 +212,7 @@ public function enrol_page_hook(stdClass $instance) {
                 'instanceid' => $instance->id,
                 'description' => get_string('purchasedescription', 'enrol_fee',
                     format_string($course->fullname, true, ['context' => $context])),
+                'successurl' => \enrol_fee\payment\service_provider::get_success_url('fee', $instance->id)->out(false),
             ];
             echo $OUTPUT->render_from_template('enrol_fee/payment_region', $data);
         }

enrol/fee/templates/payment_region.mustache

@@ -28,17 +28,20 @@
     * data-itemid
     * data-cost
     * data-description
+    * data-successurl
 
     Context variables required for this template:
     * cost - Human readable cost string including amount and currency
     * instanceid - Id of the enrolment instance
     * description - The description for this purchase
+    * successurl - The URL of the course
 
     Example context (json):
     {
         "cost": "$108.50",
         "instanceid": 11,
         "description": "Enrolment in course Introduction to algorithms",
+        "successurl": "https://moodlesite/course/view.php?id=2",
         "isguestuser": false
     }
 
@@ -63,6 +66,7 @@
             data-paymentarea="fee"
             data-itemid="{{instanceid}}"
             data-cost="{{cost}}"
+            data-successurl="{{successurl}}"
             data-description={{# quote }}{{description}}{{/ quote }}
         >
             {{# str }} sendpaymentbutton, enrol_fee {{/ str }}