MDL-57815 mod_feedback: Add new method to item class to return other data

mod/feedback/item/captcha/lib.php

@@ -188,4 +188,18 @@ class feedback_item_captcha extends feedback_item_base {
         unset($actions['update']);
         return $actions;
     }
+
+    public function get_data_for_external($item) {
+        global $CFG;
+
+        if (empty($CFG->recaptchaprivatekey) || empty($CFG->recaptchapublickey)) {
+            return null;
+        }
+
+        require_once($CFG->libdir . '/recaptchalib.php');
+        // We return the public key, maybe we want to use the javascript api to get the image.
+        $data = recaptcha_get_challenge_hash_and_urls(RECAPTCHA_API_SECURE_SERVER, $CFG->recaptchapublickey);
+        $data[] = $CFG->recaptchapublickey;
+        return json_encode($data);
+    }
 }

mod/feedback/item/feedback_item_class.php

@@ -260,6 +260,20 @@ abstract class feedback_item_base {
 
         return $actions;
     }
+
+    /**
+     * Return extra data for external functions.
+     *
+     * Some items may have additional configuration data or default values that should be returned for external functions:
+     * - Info elements: The default value information (course or category name)
+     * - Captcha: The recaptcha challenge hash key
+     *
+     * @param stdClass $item the item object
+     * @return str the data, may be json_encoded for large structures
+     */
+    public function get_data_for_external($item) {
+        return null;
+    }
 }
 
 //a dummy class to realize pagebreaks

mod/feedback/item/info/lib.php

@@ -290,4 +290,11 @@ class feedback_item_info extends feedback_item_base {
     public function can_switch_require() {
         return false;
     }
+
+    public function get_data_for_external($item) {
+        global $DB;
+        $feedback = $DB->get_record('feedback', array('id' => $item->feedback), '*', MUST_EXIST);
+        // Return the default value (course name, category name or timestamp).
+        return $this->get_current_value($item, $feedback, $feedback->course);
+    }
 }