<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Library functions for messaging
*
* @package core_message
* @copyright 2008 Luis Rodrigues
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once($CFG->libdir.'/eventslib.php');
define('MESSAGE_SHORTLENGTH', 300);
define('MESSAGE_HISTORY_ALL', 1);
define('MESSAGE_SEARCH_MAX_RESULTS', 200);
define('MESSAGE_TYPE_NOTIFICATION', 'notification');
define('MESSAGE_TYPE_MESSAGE', 'message');
/**
* Define contants for messaging default settings population. For unambiguity of
* plugin developer intentions we use 4-bit value (LSB numbering):
* bit 0 - whether to send message when user is loggedin (MESSAGE_DEFAULT_LOGGEDIN)
* bit 1 - whether to send message when user is loggedoff (MESSAGE_DEFAULT_LOGGEDOFF)
* bit 2..3 - messaging permission (MESSAGE_DISALLOWED|MESSAGE_PERMITTED|MESSAGE_FORCED)
*
* MESSAGE_PERMITTED_MASK contains the mask we use to distinguish permission setting
*/
define('MESSAGE_DEFAULT_LOGGEDIN', 0x01); // 0001
define('MESSAGE_DEFAULT_LOGGEDOFF', 0x02); // 0010
define('MESSAGE_DISALLOWED', 0x04); // 0100
define('MESSAGE_PERMITTED', 0x08); // 1000
define('MESSAGE_FORCED', 0x0c); // 1100
define('MESSAGE_PERMITTED_MASK', 0x0c); // 1100
/**
* Set default value for default outputs permitted setting
*/
define('MESSAGE_DEFAULT_PERMITTED', 'permitted');
/**
* Set default values for polling.
*/
define('MESSAGE_DEFAULT_MIN_POLL_IN_SECONDS', 10);
define('MESSAGE_DEFAULT_MAX_POLL_IN_SECONDS', 2 * MINSECS);
define('MESSAGE_DEFAULT_TIMEOUT_POLL_IN_SECONDS', 5 * MINSECS);
/**
* Retrieve users blocked by $user1
*
* @param object $user1 the user whose messages are being viewed
* @param object $user2 the user $user1 is talking to. If they are being blocked
* they will have a variable called 'isblocked' added to their user object
* @return array the users blocked by $user1
*/
function message_get_blocked_users($user1=null, $user2=null) {
global $DB, $USER;
if (empty($user1)) {
$user1 = $USER;
}
if (!empty($user2)) {
$user2->isblocked = false;
}
$blockedusers = array();
$userfields = user_picture::fields('u', array('lastaccess'));
$blockeduserssql = "SELECT $userfields, COUNT(m.id) AS messagecount
FROM {message_contacts} mc
JOIN {user} u ON u.id = mc.contactid
LEFT OUTER JOIN {message} m ON m.useridfrom = mc.contactid AND m.useridto = :user1id1
WHERE u.deleted = 0 AND mc.userid = :user1id2 AND mc.blocked = 1
GROUP BY $userfields
ORDER BY u.firstname ASC";
$rs = $DB->get_recordset_sql($blockeduserssql, array('user1id1' => $user1->id, 'user1id2' => $user1->id));
foreach($rs as $rd) {
$blockedusers[] = $rd;
if (!empty($user2) && $user2->id == $rd->id) {
$user2->isblocked = true;
}
}
$rs->close();
return $blockedusers;
}
/**
* Retrieve $user1's contacts (online, offline and strangers)
*
* @param object $user1 the user whose messages are being viewed
* @param object $user2 the user $user1 is talking to. If they are a contact
* they will have a variable called 'iscontact' added to their user object
* @return array containing 3 arrays. array($onlinecontacts, $offlinecontacts, $strangers)
*/
function message_get_contacts($user1=null, $user2=null) {
global $DB, $CFG, $USER;
if (empty($user1)) {
$user1 = $USER;
}
if (!empty($user2)) {
$user2->iscontact = false;
}
$timetoshowusers = 300; //Seconds default
if (isset($CFG->block_online_users_timetosee)) {
$timetoshowusers = $CFG->block_online_users_timetosee * 60;
}
// time which a user is counting as being active since
$timefrom = time()-$timetoshowusers;
// people in our contactlist who are online
$onlinecontacts = array();
// people in our contactlist who are offline
$offlinecontacts = array();
// people who are not in our contactlist but have sent us a message
$strangers = array();
$userfields = user_picture::fields('u', array('lastaccess'));
// get all in our contactlist who are not blocked in our contact list
// and count messages we have waiting from each of them
$contactsql = "SELECT $userfields, COUNT(m.id) AS messagecount
FROM {message_contacts} mc
JOIN {user} u ON u.id = mc.contactid
LEFT OUTER JOIN {message} m ON m.useridfrom = mc.contactid AND m.useridto = ?
WHERE u.deleted = 0 AND mc.userid = ? AND mc.blocked = 0
GROUP BY $userfields
ORDER BY u.firstname ASC";
$rs = $DB->get_recordset_sql($contactsql, array($user1->id, $user1->id));
foreach ($rs as $rd) {
if ($rd->lastaccess >= $timefrom) {
// they have been active recently, so are counted online
$onlinecontacts[] = $rd;
} else {
$offlinecontacts[] = $rd;
}
if (!empty($user2) && $user2->id == $rd->id) {
$user2->iscontact = true;
}
}
$rs->close();
// get messages from anyone who isn't in our contact list and count the number
// of messages we have from each of them
$strangersql = "SELECT $userfields, count(m.id) as messagecount
FROM {message} m
JOIN {user} u ON u.id = m.useridfrom
LEFT OUTER JOIN {message_contacts} mc ON mc.contactid = m.useridfrom AND mc.userid = m.useridto
WHERE u.deleted = 0 AND mc.id IS NULL AND m.useridto = ?
GROUP BY $userfields
ORDER BY u.firstname ASC";
$rs = $DB->get_recordset_sql($strangersql, array($USER->id));
// Add user id as array index, so supportuser and noreply user don't get duplicated (if they are real users).
foreach ($rs as $rd) {
$strangers[$rd->id] = $rd;
}
$rs->close();
// Add noreply user and support user to the list, if they don't exist.
$supportuser = core_user::get_support_user();
if (!isset($strangers[$supportuser->id])) {
$supportuser->messagecount = message_count_unread_messages($USER, $supportuser);
if ($supportuser->messagecount > 0) {
$strangers[$supportuser->id] = $supportuser;
}
}
$noreplyuser = core_user::get_noreply_user();
if (!isset($strangers[$noreplyuser->id])) {
$noreplyuser->messagecount = message_count_unread_messages($USER, $noreplyuser);
if ($noreplyuser->messagecount > 0) {
$strangers[$noreplyuser->id] = $noreplyuser;
}
}
return array($onlinecontacts, $offlinecontacts, $strangers);
}
/**
* Returns the count of unread messages for user. Either from a specific user or from all users.
*
* @param object $user1 the first user. Defaults to $USER
* @param object $user2 the second user. If null this function will count all of user 1's unread messages.
* @return int the count of $user1's unread messages
*/
function message_count_unread_messages($user1=null, $user2=null) {
global $USER, $DB;
if (empty($user1)) {
$user1 = $USER;
}
if (!empty($user2)) {
return $DB->count_records_select('message', "useridto = ? AND useridfrom = ?",
array($user1->id, $user2->id), "COUNT('id')");
} else {
return $DB->count_records_select('message', "useridto = ?",
array($user1->id), "COUNT('id')");
}
}
/**
* Get the users recent conversations meaning all the people they've recently
* sent or received a message from plus the most recent message sent to or received from each other user
*
* @param object|int $userorid the current user or user id
* @param int $limitfrom can be used for paging
* @param int $limitto can be used for paging
* @return array
*/
function message_get_recent_conversations($userorid, $limitfrom = 0, $limitto = 100) {
global $DB;
if (is_object($userorid)) {
$user = $userorid;
} else {
$userid = $userorid;
$user = new stdClass();
$user->id = $userid;
}
$userfields = user_picture::fields('otheruser', array('lastaccess'));
// This query retrieves the most recent message received from or sent to
// seach other user.
//
// If two messages have the same timecreated, we take the one with the
// larger id.
//
// There is a separate query for read and unread messages as they are stored
// in different tables. They were originally retrieved in one query but it
// was so large that it was difficult to be confident in its correctness.
$uniquefield = $DB->sql_concat('message.useridfrom', "'-'", 'message.useridto');
$sql = "SELECT $uniquefield, $userfields,
message.id as mid, message.notification, message.useridfrom, message.useridto,
message.smallmessage, message.fullmessage, message.fullmessagehtml,
message.fullmessageformat, message.timecreated,
contact.id as contactlistid, contact.blocked
FROM {message_read} message
JOIN (
SELECT MAX(id) AS messageid,
matchedmessage.useridto,
matchedmessage.useridfrom
FROM {message_read} matchedmessage
INNER JOIN (
SELECT MAX(recentmessages.timecreated) timecreated,
recentmessages.useridfrom,
recentmessages.useridto
FROM {message_read} recentmessages
WHERE (
(recentmessages.useridfrom = :userid1 AND recentmessages.timeuserfromdeleted = 0) OR
(recentmessages.useridto = :userid2 AND recentmessages.timeusertodeleted = 0)
)
GROUP BY recentmessages.useridfrom, recentmessages.useridto
) recent ON matchedmessage.useridto = recent.useridto
AND matchedmessage.useridfrom = recent.useridfrom
AND matchedmessage.timecreated = recent.timecreated
WHERE (
(matchedmessage.useridfrom = :userid6 AND matchedmessage.timeuserfromdeleted = 0) OR
(matchedmessage.useridto = :userid7 AND matchedmessage.timeusertodeleted = 0)
)
GROUP BY matchedmessage.useridto, matchedmessage.useridfrom
) messagesubset ON messagesubset.messageid = message.id
JOIN {user} otheruser ON (message.useridfrom = :userid4 AND message.useridto = otheruser.id)
OR (message.useridto = :userid5 AND message.useridfrom = otheruser.id)
LEFT JOIN {message_contacts} contact ON contact.userid = :userid3 AND contact.contactid = otheruser.id
WHERE otheruser.deleted = 0 AND message.notification = 0
ORDER BY message.timecreated DESC";
$params = array(
'userid1' => $user->id,
'userid2' => $user->id,
'userid3' => $user->id,
'userid4' => $user->id,
'userid5' => $user->id,
'userid6' => $user->id,
'userid7' => $user->id
);
$read = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
// We want to get the messages that have not been read. These are stored in the 'message' table. It is the
// exact same query as the one above, except for the table we are querying. So, simply replace references to
// the 'message_read' table with the 'message' table.
$sql = str_replace('{message_read}', '{message}', $sql);
$unread = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
$unreadcountssql = 'SELECT useridfrom, count(*) as count
FROM {message}
WHERE useridto = :userid
AND timeusertodeleted = 0
AND notification = 0
GROUP BY useridfrom';
$unreadcounts = $DB->get_records_sql($unreadcountssql, array('userid' => $user->id));
// Union the 2 result sets together looking for the message with the most
// recent timecreated for each other user.
// $conversation->id (the array key) is the other user's ID.
$conversations = array();
$conversation_arrays = array($unread, $read);
foreach ($conversation_arrays as $conversation_array) {
foreach ($conversation_array as $conversation) {
// Only consider it unread if $user has unread messages.
if (isset($unreadcounts[$conversation->useridfrom])) {
$conversation->isread = 0;
$conversation->unreadcount = $unreadcounts[$conversation->useridfrom]->count;
} else {
$conversation->isread = 1;
}
if (!isset($conversations[$conversation->id])) {
$conversations[$conversation->id] = $conversation;
} else {
$current = $conversations[$conversation->id];
// We need to maintain the isread and unreadcount values from existing
// parts of the conversation if we're replacing it.
$conversation->isread = ($conversation->isread && $current->isread);
if (isset($current->unreadcount) && !isset($conversation->unreadcount)) {
$conversation->unreadcount = $current->unreadcount;
}
if ($current->timecreated < $conversation->timecreated) {
$conversations[$conversation->id] = $conversation;
} else if ($current->timecreated == $conversation->timecreated) {
if ($current->mid < $conversation->mid) {
$conversations[$conversation->id] = $conversation;
}
}
}
}
}
// Sort the conversations by $conversation->timecreated, newest to oldest
// There may be multiple conversations with the same timecreated
// The conversations array contains both read and unread messages (different tables) so sorting by ID won't work
$result = core_collator::asort_objects_by_property($conversations, 'timecreated', core_collator::SORT_NUMERIC);
$conversations = array_reverse($conversations);
return $conversations;
}
/**
* Try to guess how to convert the message to html.
*
* @access private
*
* @param stdClass $message
* @param bool $forcetexttohtml
* @return string html fragment
*/
function message_format_message_text($message, $forcetexttohtml = false) {
// Note: this is a very nasty hack that tries to work around the weird messaging rules and design.
$options = new stdClass();
$options->para = false;
$options->blanktarget = true;
$format = $message->fullmessageformat;
if (strval($message->smallmessage) !== '') {
if ($message->notification == 1) {
if (strval($message->fullmessagehtml) !== '' or strval($message->fullmessage) !== '') {
$format = FORMAT_PLAIN;
}
}
$messagetext = $message->smallmessage;
} else if ($message->fullmessageformat == FORMAT_HTML) {
if (strval($message->fullmessagehtml) !== '') {
$messagetext = $message->fullmessagehtml;
} else {
$messagetext = $message->fullmessage;
$format = FORMAT_MOODLE;
}
} else {
if (strval($message->fullmessage) !== '') {
$messagetext = $message->fullmessage;
} else {
$messagetext = $message->fullmessagehtml;
$format = FORMAT_HTML;
}
}
if ($forcetexttohtml) {
// This is a crazy hack, why not set proper format when creating the notifications?
if ($format === FORMAT_PLAIN) {
$format = FORMAT_MOODLE;
}
}
return format_text($messagetext, $format, $options);
}
/**
* Add the selected user as a contact for the current user
*
* @param int $contactid the ID of the user to add as a contact
* @param int $blocked 1 if you wish to block the contact
* @param int $userid the user ID of the user we want to add the contact for, defaults to current user if not specified.
* @return bool/int false if the $contactid isnt a valid user id. True if no changes made.
* Otherwise returns the result of update_record() or insert_record()
*/
function message_add_contact($contactid, $blocked = 0, $userid = 0) {
global $USER, $DB;
if (!$DB->record_exists('user', array('id' => $contactid))) { // invalid userid
return false;
}
if (empty($userid)) {
$userid = $USER->id;
}
// Check if a record already exists as we may be changing blocking status.
if (($contact = $DB->get_record('message_contacts', array('userid' => $userid, 'contactid' => $contactid))) !== false) {
// Check if blocking status has been changed.
if ($contact->blocked != $blocked) {
$contact->blocked = $blocked;
$DB->update_record('message_contacts', $contact);
if ($blocked == 1) {
// Trigger event for blocking a contact.
$event = \core\event\message_contact_blocked::create(array(
'objectid' => $contact->id,
'userid' => $contact->userid,
'relateduserid' => $contact->contactid,
'context' => context_user::instance($contact->userid)
));
$event->add_record_snapshot('message_contacts', $contact);
$event->trigger();
} else {
// Trigger event for unblocking a contact.
$event = \core\event\message_contact_unblocked::create(array(
'objectid' => $contact->id,
'userid' => $contact->userid,
'relateduserid' => $contact->contactid,
'context' => context_user::instance($contact->userid)
));
$event->add_record_snapshot('message_contacts', $contact);
$event->trigger();
}
return true;
} else {
// No change to blocking status.
return true;
}
} else {
// New contact record.
$contact = new stdClass();
$contact->userid = $userid;
$contact->contactid = $contactid;
$contact->blocked = $blocked;
$contact->id = $DB->insert_record('message_contacts', $contact);
$eventparams = array(
'objectid' => $contact->id,
'userid' => $contact->userid,
'relateduserid' => $contact->contactid,
'context' => context_user::instance($contact->userid)
);
if ($blocked) {
$event = \core\event\message_contact_blocked::create($eventparams);
} else {
$event = \core\event\message_contact_added::create($eventparams);
}
// Trigger event.
$event->trigger();
return true;
}
}
/**
* remove a contact
*
* @param int $contactid the user ID of the contact to remove
* @param int $userid the user ID of the user we want to remove the contacts for, defaults to current user if not specified.
* @return bool returns the result of delete_records()
*/
function message_remove_contact($contactid, $userid = 0) {
global $USER, $DB;
if (empty($userid)) {
$userid = $USER->id;
}
if ($contact = $DB->get_record('message_contacts', array('userid' => $userid, 'contactid' => $contactid))) {
$DB->delete_records('message_contacts', array('id' => $contact->id));
// Trigger event for removing a contact.
$event = \core\event\message_contact_removed::create(array(
'objectid' => $contact->id,
'userid' => $contact->userid,
'relateduserid' => $contact->contactid,
'context' => context_user::instance($contact->userid)
));
$event->add_record_snapshot('message_contacts', $contact);
$event->trigger();
return true;
}
return false;
}
/**
* Unblock a contact. Note that this reverts the previously blocked user back to a non-contact.
*
* @param int $contactid the user ID of the contact to unblock
* @param int $userid the user ID of the user we want to unblock the contact for, defaults to current user
* if not specified.
* @return bool returns the result of delete_records()
*/
function message_unblock_contact($contactid, $userid = 0) {
return message_add_contact($contactid, 0, $userid);
}
/**
* Block a user.
*
* @param int $contactid the user ID of the user to block
* @param int $userid the user ID of the user we want to unblock the contact for, defaults to current user
* if not specified.
* @return bool
*/
function message_block_contact($contactid, $userid = 0) {
return message_add_contact($contactid, 1, $userid);
}
/**
* Checks if a user can delete a message.
*
* @param stdClass $message the message to delete
* @param string $userid the user id of who we want to delete the message for (this may be done by the admin
* but will still seem as if it was by the user)
* @return bool Returns true if a user can delete the message, false otherwise.
*/
function message_can_delete_message($message, $userid) {
global $USER;
if ($message->useridfrom == $userid) {
$userdeleting = 'useridfrom';
} else if ($message->useridto == $userid) {
$userdeleting = 'useridto';
} else {
return false;
}
$systemcontext = context_system::instance();
// Let's check if the user is allowed to delete this message.
if (has_capability('moodle/site:deleteanymessage', $systemcontext) ||
((has_capability('moodle/site:deleteownmessage', $systemcontext) &&
$USER->id == $message->$userdeleting))) {
return true;
}
return false;
}
/**
* Deletes a message.
*
* This function does not verify any permissions.
*
* @param stdClass $message the message to delete
* @param string $userid the user id of who we want to delete the message for (this may be done by the admin
* but will still seem as if it was by the user)
* @return bool
*/
function message_delete_message($message, $userid) {
global $DB;
// The column we want to alter.
if ($message->useridfrom == $userid) {
$coltimedeleted = 'timeuserfromdeleted';
} else if ($message->useridto == $userid) {
$coltimedeleted = 'timeusertodeleted';
} else {
return false;
}
// Don't update it if it's already been deleted.
if ($message->$coltimedeleted > 0) {
return false;
}
// Get the table we want to update.
if (isset($message->timeread)) {
$messagetable = 'message_read';
} else {
$messagetable = 'message';
}
// Mark the message as deleted.
$updatemessage = new stdClass();
$updatemessage->id = $message->id;
$updatemessage->$coltimedeleted = time();
$success = $DB->update_record($messagetable, $updatemessage);
if ($success) {
// Trigger event for deleting a message.
\core\event\message_deleted::create_from_ids($message->useridfrom, $message->useridto,
$userid, $messagetable, $message->id)->trigger();
}
return $success;
}
/**
* Load a user's contact record
*
* @param int $contactid the user ID of the user whose contact record you want
* @return array message contacts
*/
function message_get_contact($contactid) {
global $USER, $DB;
return $DB->get_record('message_contacts', array('userid' => $USER->id, 'contactid' => $contactid));
}
/**
* Search through course users.
*
* If $courseids contains the site course then this function searches
* through all undeleted and confirmed users.
*
* @param int|array $courseids Course ID or array of course IDs.
* @param string $searchtext the text to search for.
* @param string $sort the column name to order by.
* @param string|array $exceptions comma separated list or array of user IDs to exclude.
* @return array An array of {@link $USER} records.
*/
function message_search_users($courseids, $searchtext, $sort='', $exceptions='') {
global $CFG, $USER, $DB;
// Basic validation to ensure that the parameter $courseids is not an empty array or an empty value.
if (!$courseids) {
$courseids = array(SITEID);
}
// Allow an integer to be passed.
if (!is_array($courseids)) {
$courseids = array($courseids);
}
$fullname = $DB->sql_fullname();
$ufields = user_picture::fields('u');
if (!empty($sort)) {
$order = ' ORDER BY '. $sort;
} else {
$order = '';
}
$params = array(
'userid' => $USER->id,
'query' => "%$searchtext%"
);
if (empty($exceptions)) {
$exceptions = array();
} else if (!empty($exceptions) && is_string($exceptions)) {
$exceptions = explode(',', $exceptions);
}
// Ignore self and guest account.
$exceptions[] = $USER->id;
$exceptions[] = $CFG->siteguest;
// Exclude exceptions from the search result.
list($except, $params_except) = $DB->get_in_or_equal($exceptions, SQL_PARAMS_NAMED, 'param', false);
$except = ' AND u.id ' . $except;
$params = array_merge($params_except, $params);
if (in_array(SITEID, $courseids)) {
// Search on site level.
return $DB->get_records_sql("SELECT $ufields, mc.id as contactlistid, mc.blocked
FROM {user} u
LEFT JOIN {message_contacts} mc
ON mc.contactid = u.id AND mc.userid = :userid
WHERE u.deleted = '0' AND u.confirmed = '1'
AND (".$DB->sql_like($fullname, ':query', false).")
$except
$order", $params);
} else {
// Search in courses.
// Getting the context IDs or each course.
$contextids = array();
foreach ($courseids as $courseid) {
$context = context_course::instance($courseid);
$contextids = array_merge($contextids, $context->get_parent_context_ids(true));
}
list($contextwhere, $contextparams) = $DB->get_in_or_equal(array_unique($contextids), SQL_PARAMS_NAMED, 'context');
$params = array_merge($params, $contextparams);
// Everyone who has a role assignment in this course or higher.
// TODO: add enabled enrolment join here (skodak)
$users = $DB->get_records_sql("SELECT DISTINCT $ufields, mc.id as contactlistid, mc.blocked
FROM {user} u
JOIN {role_assignments} ra ON ra.userid = u.id
LEFT JOIN {message_contacts} mc
ON mc.contactid = u.id AND mc.userid = :userid
WHERE u.deleted = '0' AND u.confirmed = '1'
AND (".$DB->sql_like($fullname, ':query', false).")
AND ra.contextid $contextwhere
$except
$order", $params);
return $users;
}
}
/**
* Format a message for display in the message history
*
* @param object $message the message object
* @param string $format optional date format
* @param string $keywords keywords to highlight
* @param string $class CSS class to apply to the div around the message
* @return string the formatted message
*/
function message_format_message($message, $format='', $keywords='', $class='other') {
static $dateformat;
//if we haven't previously set the date format or they've supplied a new one
if ( empty($dateformat) || (!empty($format) && $dateformat != $format) ) {
if ($format) {
$dateformat = $format;
} else {
$dateformat = get_string('strftimedatetimeshort');
}
}
$time = userdate($message->timecreated, $dateformat);
$messagetext = message_format_message_text($message, false);
if ($keywords) {
$messagetext = highlight($keywords, $messagetext);
}
$messagetext .= message_format_contexturl($message);
$messagetext = clean_text($messagetext, FORMAT_HTML);
return <<<TEMPLATE
<div class='message $class'>
<a name="m{$message->id}"></a>
<span class="message-meta"><span class="time">$time</span></span>: <span class="text">$messagetext</span>
</div>
TEMPLATE;
}
/**
* Format a the context url and context url name of a message for display
*
* @param object $message the message object
* @return string the formatted string
*/
function message_format_contexturl($message) {
$s = null;
if (!empty($message->contexturl)) {
$displaytext = null;
if (!empty($message->contexturlname)) {
$displaytext= $message->contexturlname;
} else {
$displaytext= $message->contexturl;
}
$s .= html_writer::start_tag('div',array('class' => 'messagecontext'));
$s .= get_string('view').': '.html_writer::tag('a', $displaytext, array('href' => $message->contexturl));
$s .= html_writer::end_tag('div');
}
return $s;
}
/**
* Send a message from one user to another. Will be delivered according to the message recipients messaging preferences
*
* @param object $userfrom the message sender
* @param object $userto the message recipient
* @param string $message the message
* @param int $format message format such as FORMAT_PLAIN or FORMAT_HTML
* @return int|false the ID of the new message or false
*/
function message_post_message($userfrom, $userto, $message, $format) {
global $SITE, $CFG, $USER;
$eventdata = new \core\message\message();
$eventdata->courseid = 1;
$eventdata->component = 'moodle';
$eventdata->name = 'instantmessage';
$eventdata->userfrom = $userfrom;
$eventdata->userto = $userto;
//using string manager directly so that strings in the message will be in the message recipients language rather than the senders
$eventdata->subject = get_string_manager()->get_string('unreadnewmessage', 'message', fullname($userfrom), $userto->lang);
if ($format == FORMAT_HTML) {
$eventdata->fullmessagehtml = $message;
//some message processors may revert to sending plain text even if html is supplied
//so we keep both plain and html versions if we're intending to send html
$eventdata->fullmessage = html_to_text($eventdata->fullmessagehtml);
} else {
$eventdata->fullmessage = $message;
$eventdata->fullmessagehtml = '';
}
$eventdata->fullmessageformat = $format;
$eventdata->smallmessage = $message;//store the message unfiltered. Clean up on output.
$s = new stdClass();
$s->sitename = format_string($SITE->shortname, true, array('context' => context_course::instance(SITEID)));
$s->url = $CFG->wwwroot.'/message/index.php?user='.$userto->id.'&id='.$userfrom->id;
$emailtagline = get_string_manager()->get_string('emailtagline', 'message', $s, $userto->lang);
if (!empty($eventdata->fullmessage)) {
$eventdata->fullmessage .= "\n\n---------------------------------------------------------------------\n".$emailtagline;
}
if (!empty($eventdata->fullmessagehtml)) {
$eventdata->fullmessagehtml .= "<br /><br />---------------------------------------------------------------------<br />".$emailtagline;
}
$eventdata->timecreated = time();
$eventdata->notification = 0;
return message_send($eventdata);
}
/**
* Moves messages from a particular user from the message table (unread messages) to message_read
* This is typically only used when a user is deleted
*
* @param object $userid User id
* @return boolean success
*/
function message_move_userfrom_unread2read($userid) {
global $DB;
// move all unread messages from message table to message_read
if ($messages = $DB->get_records_select('message', 'useridfrom = ?', array($userid), 'timecreated')) {
foreach ($messages as $message) {
message_mark_message_read($message, 0); //set timeread to 0 as the message was never read
}
}
return true;
}
/**
* Mark a single message as read
*
* @param stdClass $message An object with an object property ie $message->id which is an id in the message table
* @param int $timeread the timestamp for when the message should be marked read. Usually time().
* @param bool $messageworkingempty Is the message_working table already confirmed empty for this message?
* @return int the ID of the message in the message_read table
*/
function message_mark_message_read($message, $timeread, $messageworkingempty=false) {
global $DB;
$message->timeread = $timeread;
$messageid = $message->id;
unset($message->id);//unset because it will get a new id on insert into message_read
//If any processors have pending actions abort them
if (!$messageworkingempty) {
$DB->delete_records('message_working', array('unreadmessageid' => $messageid));
}
$messagereadid = $DB->insert_record('message_read', $message);
$DB->delete_records('message', array('id' => $messageid));
// Get the context for the user who received the message.
$context = context_user::instance($message->useridto, IGNORE_MISSING);
// If the user no longer exists the context value will be false, in this case use the system context.
if ($context === false) {
$context = context_system::instance();
}
// Trigger event for reading a message.
$event = \core\event\message_viewed::create(array(
'objectid' => $messagereadid,
'userid' => $message->useridto, // Using the user who read the message as they are the ones performing the action.
'context' => $context,
'relateduserid' => $message->useridfrom,
'other' => array(
'messageid' => $messageid
)
));
$event->trigger();
return $messagereadid;
}
/**
* Get all message processors, validate corresponding plugin existance and
* system configuration
*
* @param bool $ready only return ready-to-use processors
* @param bool $reset Reset list of message processors (used in unit tests)
* @param bool $resetonly Just reset, then exit
* @return mixed $processors array of objects containing information on message processors
*/
function get_message_processors($ready = false, $reset = false, $resetonly = false) {
global $DB, $CFG;
static $processors;
if ($reset) {
$processors = array();
if ($resetonly) {
return $processors;
}
}
if (empty($processors)) {
// Get all processors, ensure the name column is the first so it will be the array key
$processors = $DB->get_records('message_processors', null, 'name DESC', 'name, id, enabled');
foreach ($processors as &$processor){
$processor = \core_message\api::get_processed_processor_object($processor);
}
}
if ($ready) {
// Filter out enabled and system_configured processors
$readyprocessors = $processors;
foreach ($readyprocessors as $readyprocessor) {
if (!($readyprocessor->enabled && $readyprocessor->configured)) {
unset($readyprocessors[$readyprocessor->name]);
}
}
return $readyprocessors;
}
return $processors;
}
/**
* Get all message providers, validate their plugin existance and
* system configuration
*
* @return mixed $processors array of objects containing information on message processors
*/
function get_message_providers() {
global $CFG, $DB;
$pluginman = core_plugin_manager::instance();
$providers = $DB->get_records('message_providers', null, 'name');
// Remove all the providers whose plugins are disabled or don't exist
foreach ($providers as $providerid => $provider) {
$plugin = $pluginman->get_plugin_info($provider->component);
if ($plugin) {
if ($plugin->get_status() === core_plugin_manager::PLUGIN_STATUS_MISSING) {
unset($providers[$providerid]); // Plugins does not exist
continue;
}
if ($plugin->is_enabled() === false) {
unset($providers[$providerid]); // Plugin disabled
continue;
}
}
}
return $providers;
}
/**
* Get an instance of the message_output class for one of the output plugins.
* @param string $type the message output type. E.g. 'email' or 'jabber'.
* @return message_output message_output the requested class.
*/
function get_message_processor($type) {
global $CFG;
// Note, we cannot use the get_message_processors function here, becaues this
// code is called during install after installing each messaging plugin, and
// get_message_processors caches the list of installed plugins.
$processorfile = $CFG->dirroot . "/message/output/{$type}/message_output_{$type}.php";
if (!is_readable($processorfile)) {
throw new coding_exception('Unknown message processor type ' . $type);
}
include_once($processorfile);
$processclass = 'message_output_' . $type;
if (!class_exists($processclass)) {
throw new coding_exception('Message processor ' . $type .
' does not define the right class');
}
return new $processclass();
}
/**
* Get messaging outputs default (site) preferences
*
* @return object $processors object containing information on message processors
*/
function get_message_output_default_preferences() {
return get_config('message');
}
/**
* Translate message default settings from binary value to the array of string
* representing the settings to be stored. Also validate the provided value and
* use default if it is malformed.
*
* @param int $plugindefault Default setting suggested by plugin
* @param string $processorname The name of processor
* @return array $settings array of strings in the order: $permitted, $loggedin, $loggedoff.
*/
function translate_message_default_setting($plugindefault, $processorname) {
// Preset translation arrays
$permittedvalues = array(
0x04 => 'disallowed',
0x08 => 'permitted',
0x0c => 'forced',
);
$loggedinstatusvalues = array(
0x00 => null, // use null if loggedin/loggedoff is not defined
0x01 => 'loggedin',
0x02 => 'loggedoff',
);
// define the default setting
$processor = get_message_processor($processorname);
$default = $processor->get_default_messaging_settings();
// Validate the value. It should not exceed the maximum size
if (!is_int($plugindefault) || ($plugindefault > 0x0f)) {
debugging(get_string('errortranslatingdefault', 'message'));
$plugindefault = $default;
}
// Use plugin default setting of 'permitted' is 0
if (!($plugindefault & MESSAGE_PERMITTED_MASK)) {
$plugindefault = $default;
}
$permitted = $permittedvalues[$plugindefault & MESSAGE_PERMITTED_MASK];
$loggedin = $loggedoff = null;
if (($plugindefault & MESSAGE_PERMITTED_MASK) == MESSAGE_PERMITTED) {
$loggedin = $loggedinstatusvalues[$plugindefault & MESSAGE_DEFAULT_LOGGEDIN];
$loggedoff = $loggedinstatusvalues[$plugindefault & MESSAGE_DEFAULT_LOGGEDOFF];
}
return array($permitted, $loggedin, $loggedoff);
}
/**
* Get messages sent or/and received by the specified users.
* Please note that this function return deleted messages too.
*
* @param int $useridto the user id who received the message
* @param int $useridfrom the user id who sent the message. -10 or -20 for no-reply or support user
* @param int $notifications 1 for retrieving notifications, 0 for messages, -1 for both
* @param bool $read true for retrieving read messages, false for unread
* @param string $sort the column name to order by including optionally direction
* @param int $limitfrom limit from
* @param int $limitnum limit num
* @return external_description
* @since 2.8
*/
function message_get_messages($useridto, $useridfrom = 0, $notifications = -1, $read = true,
$sort = 'mr.timecreated DESC', $limitfrom = 0, $limitnum = 0) {
global $DB;
$messagetable = $read ? '{message_read}' : '{message}';
$params = array('deleted' => 0);
// Empty useridto means that we are going to retrieve messages send by the useridfrom to any user.
if (empty($useridto)) {
$userfields = get_all_user_name_fields(true, 'u', '', 'userto');
$joinsql = "JOIN {user} u ON u.id = mr.useridto";
$usersql = "mr.useridfrom = :useridfrom AND u.deleted = :deleted";
$params['useridfrom'] = $useridfrom;
} else {
$userfields = get_all_user_name_fields(true, 'u', '', 'userfrom');
// Left join because useridfrom may be -10 or -20 (no-reply and support users).
$joinsql = "LEFT JOIN {user} u ON u.id = mr.useridfrom";
$usersql = "mr.useridto = :useridto AND (u.deleted IS NULL OR u.deleted = :deleted)";
$params['useridto'] = $useridto;
if (!empty($useridfrom)) {
$usersql .= " AND mr.useridfrom = :useridfrom";
$params['useridfrom'] = $useridfrom;
}
}
// Now, if retrieve notifications, conversations or both.
$typesql = "";
if ($notifications !== -1) {
$typesql = "AND mr.notification = :notification";
$params['notification'] = ($notifications) ? 1 : 0;
}
$sql = "SELECT mr.*, $userfields
FROM $messagetable mr
$joinsql
WHERE $usersql
$typesql
ORDER BY $sort";
$messages = $DB->get_records_sql($sql, $params, $limitfrom, $limitnum);
return $messages;
}
/**
* Handles displaying processor settings in a fragment.
*
* @param array $args
* @return bool|string
* @throws moodle_exception
*/
function message_output_fragment_processor_settings($args = []) {
global $PAGE;
if (!isset($args['type'])) {
throw new moodle_exception('Must provide a processor type');
}
if (!isset($args['userid'])) {
throw new moodle_exception('Must provide a userid');
}
$type = $args['type'];
$userid = $args['userid'];
$user = core_user::get_user($userid, '*', MUST_EXIST);
$processor = get_message_processor($type);
$providers = message_get_providers_for_user($userid);
$processorwrapper = new stdClass();
$processorwrapper->object = $processor;
$preferences = \core_message\api::get_all_message_preferences([$processorwrapper], $providers, $user);
$processoroutput = new \core_message\output\preferences\processor($processor, $preferences, $user, $type);
$renderer = $PAGE->get_renderer('core', 'message');
return $renderer->render_from_template('core_message/preferences_processor', $processoroutput->export_for_template($renderer));
}