From b3448b7c7c4be7da99ea1bab46e3ba6a86b0893a Mon Sep 17 00:00:00 2001
From: jacob <jacob>
Date: Tue, 22 Jun 2010 19:35:36 +0000
Subject: [PATCH] updated to delete links between schedule registrations and
 users when a schedule registration is deleted

---
 schoolschedule_event_tab.php | 126 +++++++++++++++++++++--------------
 1 file changed, 75 insertions(+), 51 deletions(-)

diff --git a/schoolschedule_event_tab.php b/schoolschedule_event_tab.php
index 094814c..4c2823b 100644
--- a/schoolschedule_event_tab.php
+++ b/schoolschedule_event_tab.php
@@ -33,47 +33,47 @@ if($_SESSION['schoolid'] && $_SESSION['schoolaccesscode']){
 	if($school) {
 		switch($_GET['action']) {
 			case "load":
-					$id=intval($_GET['id']);
-					$q=mysql_query("SELECT schedule.*,
-							events.eventtype,
-							events.website,
-							events.summary,
-							events.name,
-							locations.name AS location
-							FROM schedule 
-							JOIN events ON schedule.events_id=events.id
-							JOIN locations ON schedule.locations_id=locations.id
-							WHERE schedule.conferences_id='{$conference['id']}' 
-							AND schedule.id='{$id}'");
-					echo mysql_error();
-					$r=mysql_fetch_object($q);
-					if($r->title!=$r->name) {
-						$name="($r->name)";
-					}
-					echo "<h3>$r->title $name</h3>";
+				$id=intval($_GET['id']);
+				$q=mysql_query("SELECT schedule.*,
+						events.eventtype,
+						events.website,
+						events.summary,
+						events.name,
+						locations.name AS location
+						FROM schedule 
+						JOIN events ON schedule.events_id=events.id
+						JOIN locations ON schedule.locations_id=locations.id
+						WHERE schedule.conferences_id='{$conference['id']}' 
+						AND schedule.id='{$id}'");
+				echo mysql_error();
+				$r=mysql_fetch_object($q);
+				if($r->title!=$r->name) {
+					$name="($r->name)";
+				}
+				echo "<h3>$r->title $name</h3>";
 
 				switch($_GET['tab']) {
 					case "summary":
-					echo "<table width=\"95%\" class=\"tableview\">";
-					echo "<tr>";
-					echo "<th>".i18n("Time")."</th>\n";
-					echo "<th>".i18n("Duration")."</th>\n";
-					echo "<th>".i18n("Location")."</th>\n";
-					echo "</tr>\n";
-					echo "<tr>";
-					echo "<td>".format_time(strtotime($r->hour.":".$r->minute))."</td>\n";
-					echo "<td>$r->duration minutes</td>\n";
-					echo "<td>$r->location</td>\n";
-					echo "</tr></table>\n";
-					echo "<br />";
-					echo "<h4>".i18n("Summary")."</h4>\n";
-					echo nl2br(trim($r->summary));
-					echo "<br />\n";
-					echo "<br />\n";
+						echo "<table width=\"95%\" class=\"tableview\">";
+						echo "<tr>";
+						echo "<th>".i18n("Time")."</th>\n";
+						echo "<th>".i18n("Duration")."</th>\n";
+						echo "<th>".i18n("Location")."</th>\n";
+						echo "</tr>\n";
+						echo "<tr>";
+						echo "<td>".format_time(strtotime($r->hour.":".$r->minute))."</td>\n";
+						echo "<td>$r->duration minutes</td>\n";
+						echo "<td>$r->location</td>\n";
+						echo "</tr></table>\n";
+						echo "<br />";
+						echo "<h4>".i18n("Summary")."</h4>\n";
+						echo nl2br(trim($r->summary));
+						echo "<br />\n";
+						echo "<br />\n";
 
-					if($r->website) {
-						echo "<a target=\"_blank\" href=\"$r->website\">".i18n("Click here for the full event description")."</a> <br />\n";
-					}
+						if($r->website) {
+							echo "<a target=\"_blank\" href=\"$r->website\">".i18n("Click here for the full event description")."</a> <br />\n";
+						}
 
 					break;
 					case "register":
@@ -121,20 +121,19 @@ if($_SESSION['schoolid'] && $_SESSION['schoolaccesscode']){
 				$scheduleid=intval($_POST['scheduleid']);
 				$conferenceid=$conference['id'];
 
-					$q=mysql_query("SELECT schedule.*,
-							events.eventtype,
-							events.website,
-							events.summary,
-							events.name,
-							locations.name AS location
-							FROM schedule 
-							JOIN events ON schedule.events_id=events.id
-							JOIN locations ON schedule.locations_id=locations.id
-							WHERE schedule.conferences_id='{$conference['id']}' 
-							AND schedule.id='{$scheduleid}'");
-					$schedule=mysql_fetch_object($q);
-					echo mysql_error();
-
+				$q=mysql_query("SELECT schedule.*,
+						events.eventtype,
+						events.website,
+						events.summary,
+						events.name,
+						locations.name AS location
+						FROM schedule 
+						JOIN events ON schedule.events_id=events.id
+						JOIN locations ON schedule.locations_id=locations.id
+						WHERE schedule.conferences_id='{$conference['id']}' 
+						AND schedule.id='{$scheduleid}'");
+				$schedule=mysql_fetch_object($q);
+				echo mysql_error();
 
 				switch($_POST['regaction']) {
 					case "register": 
@@ -155,9 +154,34 @@ if($_SESSION['schoolid'] && $_SESSION['schoolaccesscode']){
 					break;
 
 					case "unregister":
+
 						$q=mysql_query("SELECT * FROM schedule_registrations WHERE so_teams_id=$teamid AND schedule_id=$scheduleid AND conferences_id=$conferenceid");
 						if(mysql_num_rows($q)) {
+
+							// delete any links between students and this registrationa
+							$q = mysql_query(
+								" SELECT users_uid, schedule_registrations_id" .
+								" FROM schedule_registrations_users_link srul" .
+								" JOIN schedule_registrations sr ON sr.id = srul.schedule_registrations_id" .
+								" WHERE sr.so_teams_id = '$teamid'" .
+								" AND sr.schedule_id='$scheduleid'" .
+								" AND sr.conferences_id='$conferenceid'"
+							);
+							while($r = mysql_fetch_array($q)){
+								$idSet[] = $r['users_uid'];
+								$srid = $r['schedule_registrations_id'];
+							}
+							if(is_array($idSet)){
+								$query = 
+									" DELETE FROM schedule_registrations_users_link" .
+									" WHERE schedule_registrations_id = $srid" .
+									" AND users_uid IN(" . implode(',', $idSet) . ")";
+								$q = mysql_query($query);
+							}
+
+							// delete the registrations themselves
 							mysql_query("DELETE FROM schedule_registrations WHERE so_teams_id='$teamid' AND schedule_id='$scheduleid' AND conferences_id='$conferenceid'");
+
 							happy_("Successfully unregistered the team from this scheduled event");
 						}
 						else {