/**
* Remove subscriptions for a user in a context
*/
function forum_remove_user_subscriptions($userid, $context)
{
global $CFG;
if (empty($context->contextlevel)) {
return false;
}
switch ($context->contextlevel) {
case CONTEXT_SYSTEM:
// For the whole site
//if ($courses = get_my_courses($userid)) {
// find all courses in which this user has a forum subscription
if ($courses = get_records_sql("SELECT c.id\n FROM {$CFG->prefix}course c,\n {$CFG->prefix}forum_subscriptions fs,\n {$CFG->prefix}forum f\n WHERE c.id = f.course AND f.id = fs.forum AND fs.userid = {$userid}\n GROUP BY c.id")) {
foreach ($courses as $course) {
$subcontext = get_context_instance(CONTEXT_COURSE, $course->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
break;
case CONTEXT_COURSECAT:
// For a whole category
if ($courses = get_records('course', 'category', $context->instanceid, '', 'id')) {
foreach ($courses as $course) {
$subcontext = get_context_instance(CONTEXT_COURSE, $course->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
if ($categories = get_records('course_categories', 'parent', $context->instanceid, '', 'id')) {
foreach ($categories as $category) {
$subcontext = get_context_instance(CONTEXT_COURSECAT, $category->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
break;
case CONTEXT_COURSE:
// For a whole course
if ($course = get_record('course', 'id', $context->instanceid, '', '', '', '', 'id')) {
// find all forums in which this user has a subscription, and its coursemodule id
if ($forums = get_records_sql("SELECT f.id, cm.id as coursemodule\n FROM {$CFG->prefix}forum f,\n {$CFG->prefix}modules m,\n {$CFG->prefix}course_modules cm,\n {$CFG->prefix}forum_subscriptions fs\n WHERE fs.userid = {$userid} AND f.course = {$context->instanceid}\n AND fs.forum = f.id AND cm.instance = f.id\n AND cm.module = m.id AND m.name = 'forum'")) {
foreach ($forums as $forum) {
if ($modcontext = get_context_instance(CONTEXT_MODULE, $forum->coursemodule)) {
if (!has_capability('mod/forum:viewdiscussion', $modcontext, $userid)) {
forum_unsubscribe($userid, $forum->id);
}
}
}
}
}
break;
case CONTEXT_MODULE:
// Just one forum
if ($cm = get_coursemodule_from_id('forum', $context->instanceid)) {
if ($forum = get_record('forum', 'id', $cm->instance)) {
if (!has_capability('mod/forum:viewdiscussion', $context, $userid)) {
forum_unsubscribe($userid, $forum->id);
}
}
}
break;
}
return true;
}
/**
* Remove subscriptions for a user in a context
*
* @global object
* @global object
* @uses CONTEXT_SYSTEM
* @uses CONTEXT_COURSECAT
* @uses CONTEXT_COURSE
* @uses CONTEXT_MODULE
* @param int $userid
* @param object $context
* @return bool
*/
function forum_remove_user_subscriptions($userid, $context) {
global $CFG, $DB;
if (empty($context->contextlevel)) {
return false;
}
switch ($context->contextlevel) {
case CONTEXT_SYSTEM: // For the whole site
// find all courses in which this user has a forum subscription
if ($courses = $DB->get_records_sql("SELECT c.id
FROM {course} c,
{forum_subscriptions} fs,
{forum} f
WHERE c.id = f.course AND f.id = fs.forum AND fs.userid = ?
GROUP BY c.id", array($userid))) {
foreach ($courses as $course) {
$subcontext = get_context_instance(CONTEXT_COURSE, $course->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
break;
case CONTEXT_COURSECAT: // For a whole category
if ($courses = $DB->get_records('course', array('category' => $context->instanceid), '', 'id')) {
foreach ($courses as $course) {
$subcontext = get_context_instance(CONTEXT_COURSE, $course->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
if ($categories = $DB->get_records('course_categories', array('parent' => $context->instanceid), '', 'id')) {
foreach ($categories as $category) {
$subcontext = get_context_instance(CONTEXT_COURSECAT, $category->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
break;
case CONTEXT_COURSE: // For a whole course
if (!is_enrolled($context, $userid)) {
if ($course = $DB->get_record('course', array('id' => $context->instanceid), 'id')) {
// find all forums in which this user has a subscription, and its coursemodule id
if ($forums = $DB->get_records_sql("SELECT f.id, cm.id as coursemodule
FROM {forum} f,
{modules} m,
{course_modules} cm,
{forum_subscriptions} fs
WHERE fs.userid = ? AND f.course = ?
AND fs.forum = f.id AND cm.instance = f.id
AND cm.module = m.id AND m.name = 'forum'", array($userid, $context->instanceid))) {
foreach ($forums as $forum) {
if ($modcontext = get_context_instance(CONTEXT_MODULE, $forum->coursemodule)) {
if (!has_capability('mod/forum:viewdiscussion', $modcontext, $userid)) {
forum_unsubscribe($userid, $forum->id);
}
}
}
}
}
}
break;
case CONTEXT_MODULE: // Just one forum
if (!is_enrolled($context, $userid)) {
if ($cm = get_coursemodule_from_id('forum', $context->instanceid)) {
if ($forum = $DB->get_record('forum', array('id' => $cm->instance))) {
if (!has_capability('mod/forum:viewdiscussion', $context, $userid)) {
forum_unsubscribe($userid, $forum->id);
}
}
}
}
break;
}
return true;
}
/**
* Remove subscriptions for a user in a context
*/
function forum_remove_user_subscriptions($userid, $context)
{
if (empty($context->contextlevel)) {
return false;
}
switch ($context->contextlevel) {
case CONTEXT_SYSTEM:
// For the whole site
if ($courses = get_records('course')) {
foreach ($courses as $course) {
$subcontext = get_context_instance(CONTEXT_COURSE, $course->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
break;
case CONTEXT_COURSECAT:
// For a whole category
if ($courses = get_records('course', 'category', $context->instanceid)) {
foreach ($courses as $course) {
$subcontext = get_context_instance(CONTEXT_COURSE, $course->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
if ($categories = get_records('course_categories', 'parent', $context->instanceid)) {
foreach ($categories as $category) {
$subcontext = get_context_instance(CONTEXT_COURSECAT, $category->id);
forum_remove_user_subscriptions($userid, $subcontext);
}
}
break;
case CONTEXT_COURSE:
// For a whole course
if ($course = get_record('course', 'id', $context->instanceid)) {
if ($forums = get_all_instances_in_course('forum', $course, $userid, true)) {
foreach ($forums as $forum) {
if ($modcontext = get_context_instance(CONTEXT_MODULE, $forum->coursemodule)) {
if (!has_capability('mod/forum:viewdiscussion', $modcontext, $userid)) {
forum_unsubscribe($userid, $forum->id);
}
}
}
}
}
break;
case CONTEXT_MODULE:
// Just one forum
if ($cm = get_coursemodule_from_id('forum', $context->instanceid)) {
if ($forum = get_record('forum', 'id', $cm->instance)) {
if (!has_capability('mod/forum:viewdiscussion', $context, $userid)) {
forum_unsubscribe($userid, $forum->id);
}
}
}
break;
}
return true;
}
