$cmid = required_param('id', PARAM_INT);
$cloneid = optional_param('clone', 0, PARAM_INT);
$file = required_param('file', PARAM_FILE);
$playspaceid = optional_param('attachmentplayspace', 0, PARAM_SEQUENCE);
$postid = optional_param('p', 0, PARAM_INT);
try {
// Security check
if ($postid) {
$post = forum_post::get_from_id($postid, $cloneid);
$post->require_view();
} else {
$forum = forum::get_from_cmid($cmid, $cloneid);
$forum->require_view(forum::NO_GROUPS);
}
if (!$playspaceid) {
$playspaceid = forum::create_attachment_playspace($postid ? $post : null);
}
// Delete the file (if not present, ignore)
$files = forum::get_attachment_playspace_files($playspaceid, false);
foreach ($files as $existing) {
if (basename($existing) == $file) {
forum_utils::unlink($existing);
}
}
// Print out the playspace id in case they don't already have it
header('Content-Type: text/plain');
print $playspaceid;
} catch (forum_exception $e) {
header('Content-Type: text/plain', true, 500);
print $e->getMessage();
}
private function add_attachment($path, $courseid = 0, $forumid = 0, $draftid = 0)
{
// Check source file exists
if (!file_exists($path)) {
throw new forum_exception("Missing file {$path}");
}
// Get folder
if (isset($this)) {
$folder = $this->get_attachment_folder();
} else {
$folder = self::get_attachment_folder($courseid, $forumid, $draftid);
}
if (!check_dir_exists($folder, true, true)) {
throw new forum_exception("Failed to create attachment folder {$folder}");
}
// Check target path doesn't already exist. If it does, delete existing
// file.
$target = $folder . '/' . basename($path);
if (file_exists($target)) {
forum_utils::unlink($target);
}
// Move new file into place
forum_utils::rename($path, $target);
}
/**
* Edits an existing message. The previous version of the message is
* retained for admins to view if needed.
* @param string $subject Subject
* @param string $message Message
* @param int $format Moodle format ID
* @param mixed $deleteattachments Array of names (only) of existing
* attachments to delete, or 'true' to delete all
* @param array $newattachments Additional attachments to add (if any)
* @param bool $setimportant If true, highlight the post
* @param bool $mailnow New value of mailnow flag (ignored if message was already mailed)
* @param int $userid Userid doing the editing (0 = current)
*/
function edit($subject, $message, $format, $deleteattachments = array(), $newattachments = array(), $setimportant = false, $mailnow = false, $userid = 0, $log = true)
{
$now = time();
// Create copy of existing entry ('old version')
$copy = clone $this->postfields;
$copy->subject = is_null($copy->subject) ? null : addslashes($copy->subject);
$copy->message = addslashes($copy->message);
// Copy has oldversion set to 1 and parentpost set to id of real post
$copy->oldversion = 1;
$copy->parentpostid = $copy->id;
unset($copy->id);
// OK, add copy
forum_utils::start_transaction();
$copyid = forum_utils::insert_record('forumng_posts', $copy);
// If there are attachments...
$attachments = $this->get_attachment_names();
$copiedattachments = 0;
if ($attachments) {
// NOTE: The names are confusing. $newfolder is the EXISTING folder
// but it relates to the attachments for the NEW version of the
// post. $oldfolder is a newly-created folder but it relates to
// attachments for the OLD version of the posdt
$newfolder = $this->get_attachment_folder();
$oldfolder = $this->get_attachment_folder($copyid);
// Copy the attachments folder to an 'old' historic one, then
// delete files from the current attachment folder. This used to be
// done with rename but we experienced failures when creating the
// folder with the same name as the one we just renamed away.
forum_utils::mkdir($oldfolder);
$handle = forum_utils::opendir($newfolder);
$keepfolder = false;
while (false !== ($name = readdir($handle))) {
if ($name != '.' && $name != '..') {
$source = "{$newfolder}/{$name}";
// Copy file to the 'old' version folder
forum_utils::copy($source, "{$oldfolder}/{$name}");
// Consider whether it should be deleted from the 'new'
// version folder
if ($deleteattachments === true || $deleteattachments && in_array($name, $deleteattachments)) {
forum_utils::unlink($source);
} else {
$keepfolder = true;
$copiedattachments++;
}
}
}
closedir($handle);
if (!$keepfolder) {
forum_utils::rmdir($newfolder);
}
}
// Update existing entry with new data where it changed
$update = new StdClass();
$gotsubject = false;
if ($subject !== $this->postfields->subject) {
$update->subject = strlen(trim($subject)) == 0 ? null : addslashes($subject);
$gotsubject = true;
}
if ($message !== $this->postfields->message) {
$update->message = addslashes($message);
}
if ($format != $this->postfields->format) {
$update->format = $format;
}
if ($copiedattachments == 0 && count($newattachments) == 0 && $this->postfields->attachments) {
$update->attachments = 0;
} else {
if (count($newattachments) > 0 && !$this->postfields->attachments) {
$update->attachments = 1;
}
}
if ($setimportant) {
$update->important = 1;
} else {
$update->important = 0;
}
if ($this->postfields->mailstate == forum::MAILSTATE_NOT_MAILED && $mailnow) {
$update->mailstate = forum::MAILSTATE_NOW_NOT_MAILED;
} else {
if ($this->postfields->mailstate == forum::MAILSTATE_NOW_NOT_MAILED && !$mailnow) {
$update->mailstate = forum::MAILSTATE_NOT_MAILED;
}
}
$update->modified = $now;
$update->edituserid = forum_utils::get_real_userid($userid);
if (count((array) $update) > 0) {
$update->id = $this->postfields->id;
forum_utils::update_record('forumng_posts', $update);
}
// Add new attachments
foreach ($newattachments as $path) {
$this->add_attachment($path);
}
if ($log) {
$this->log('edit post');
}
// Update in-memory representation
foreach ((array) $update as $name => $value) {
$this->postfields->{$name} = $value === null ? null : stripslashes($value);
}
// If this is the root post, then changing its subject affects
// the discussion subhject
if ($this->is_root_post() && $gotsubject) {
$this->discussion->hack_subject($this->postfields->subject);
}
// Uncache before updating search (want to make sure that the recursive
// update gets latest data)
$this->get_discussion()->uncache();
// Update search index
if (isset($update->message) || $gotsubject) {
// Update for this post
$this->search_update();
// If changing the subject of a root post, update all posts in the
// discussion (ugh)
if ($this->is_root_post() && $gotsubject) {
$this->search_update_children();
}
}
forum_utils::finish_transaction();
}
