Send weekly reminders to PIs for 4 weeks

	Meant to be run as a daily cron job, this script will email PIs with outstanding requests.
	After 34 days, requests will be removed from the database.

workers/group_user_request_owner_reminder.php

@@ -0,0 +1,38 @@
+<?php
+/*
+Emails PIs that have oustanding member requests once a week for 4 weeks.
+Removes the request after 34 days have passed.
+*/
+
+require_once "../resources/autoload.php";
+use UnityWebPortal\lib\UnityGroup;
+
+$today = time();
+$accounts = $LDAP->getAllPIGroups($SQL, $MAILER, $REDIS);
+foreach ($accounts as $pi_group) {
+    $pi_user = $pi_group->getOwner();
+    $requests = $pi_group->getRequests();
+    foreach ($requests as $request) {
+        $request_date = strtotime($request[1]);
+        $daysDifference = ($today - $request_date) / (60 * 60 * 24);
+        if ($daysDifference > 34) {
+            # No interface in UnityGroup for this, so use DB directly
+            $SQL->removeRequest($request[0], $pi_group->getPIUID());
+        }
+        elseif ($daysDifference > 1 && $daysDifference % 7 == 0) {
+            $new_user = $request[0];
+            // send email to PI
+            $MAILER->sendMail(
+                $pi_user->getMail(),
+                "group_user_request_owner",
+                array(
+                    "group" => $pi_group->getPIUID(),
+                    "user" => $new_user->getUID(),
+                    "name" => $new_user->getFullName(),
+                    "email" => $new_user->getMail(),
+                    "org" => $new_user->getOrg()
+                    )
+            );
+        }
+    }
+}