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lib.php
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<?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_DISCUSSION_WIDTH',600);
define ('MESSAGE_DISCUSSION_HEIGHT',500);
define ('MESSAGE_SHORTVIEW_LIMIT', 8);//the maximum number of messages to show on the short message history
define('MESSAGE_HISTORY_SHORT',0);
define('MESSAGE_HISTORY_ALL',1);
define('MESSAGE_VIEW_UNREAD_MESSAGES','unread');
define('MESSAGE_VIEW_RECENT_CONVERSATIONS','recentconversations');
define('MESSAGE_VIEW_RECENT_NOTIFICATIONS','recentnotifications');
define('MESSAGE_VIEW_CONTACTS','contacts');
define('MESSAGE_VIEW_BLOCKED','blockedusers');
define('MESSAGE_VIEW_COURSE','course_');
define('MESSAGE_VIEW_SEARCH','search');
define('MESSAGE_SEARCH_MAX_RESULTS', 200);
define('MESSAGE_CONTACTS_PER_PAGE',10);
define('MESSAGE_MAX_COURSE_NAME_LENGTH', 30);
/**
* 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');
/**
* Print the selector that allows the user to view their contacts, course participants, their recent
* conversations etc
*
* @param int $countunreadtotal how many unread messages does the user have?
* @param int $viewing What is the user viewing? ie MESSAGE_VIEW_UNREAD_MESSAGES, MESSAGE_VIEW_SEARCH etc
* @param object $user1 the user whose messages are being viewed
* @param object $user2 the user $user1 is talking to
* @param array $blockedusers an array of users blocked by $user1
* @param array $onlinecontacts an array of $user1's online contacts
* @param array $offlinecontacts an array of $user1's offline contacts
* @param array $strangers an array of users who have messaged $user1 who aren't contacts
* @param bool $showactionlinks show action links (add/remove contact etc)
* @param int $page if there are so many users listed that they have to be split into pages what page are we viewing
* @return void
*/
function message_print_contact_selector($countunreadtotal, $viewing, $user1, $user2, $blockedusers, $onlinecontacts, $offlinecontacts, $strangers, $showactionlinks, $page=0) {
global $PAGE;
echo html_writer::start_tag('div', array('class' => 'contactselector mdl-align'));
//if 0 unread messages and they've requested unread messages then show contacts
if ($countunreadtotal == 0 && $viewing == MESSAGE_VIEW_UNREAD_MESSAGES) {
$viewing = MESSAGE_VIEW_CONTACTS;
}
//if they have no blocked users and they've requested blocked users switch them over to contacts
if (count($blockedusers) == 0 && $viewing == MESSAGE_VIEW_BLOCKED) {
$viewing = MESSAGE_VIEW_CONTACTS;
}
$onlyactivecourses = true;
$courses = enrol_get_users_courses($user1->id, $onlyactivecourses);
$coursecontexts = message_get_course_contexts($courses);//we need one of these again so holding on to them
$strunreadmessages = null;
if ($countunreadtotal>0) { //if there are unread messages
$strunreadmessages = get_string('unreadmessages','message', $countunreadtotal);
}
message_print_usergroup_selector($viewing, $courses, $coursecontexts, $countunreadtotal, count($blockedusers), $strunreadmessages, $user1);
if ($viewing == MESSAGE_VIEW_UNREAD_MESSAGES) {
message_print_contacts($onlinecontacts, $offlinecontacts, $strangers, $PAGE->url, 1, $showactionlinks,$strunreadmessages, $user2);
} else if ($viewing == MESSAGE_VIEW_CONTACTS || $viewing == MESSAGE_VIEW_SEARCH || $viewing == MESSAGE_VIEW_RECENT_CONVERSATIONS || $viewing == MESSAGE_VIEW_RECENT_NOTIFICATIONS) {
message_print_contacts($onlinecontacts, $offlinecontacts, $strangers, $PAGE->url, 0, $showactionlinks, $strunreadmessages, $user2);
} else if ($viewing == MESSAGE_VIEW_BLOCKED) {
message_print_blocked_users($blockedusers, $PAGE->url, $showactionlinks, null, $user2);
} else if (substr($viewing, 0, 7) == MESSAGE_VIEW_COURSE) {
$courseidtoshow = intval(substr($viewing, 7));
if (!empty($courseidtoshow)
&& array_key_exists($courseidtoshow, $coursecontexts)
&& has_capability('moodle/course:viewparticipants', $coursecontexts[$courseidtoshow])) {
message_print_participants($coursecontexts[$courseidtoshow], $courseidtoshow, $PAGE->url, $showactionlinks, null, $page, $user2);
}
}
// Only show the search button if we're viewing our own contacts.
if ($viewing == MESSAGE_VIEW_CONTACTS && $user2 == null) {
echo html_writer::start_tag('form', array('action' => 'index.php','method' => 'GET'));
echo html_writer::start_tag('fieldset');
$managebuttonclass = 'visible';
$strmanagecontacts = get_string('search','message');
echo html_writer::empty_tag('input', array('type' => 'hidden','name' => 'viewing','value' => MESSAGE_VIEW_SEARCH));
echo html_writer::empty_tag('input', array('type' => 'submit','value' => $strmanagecontacts,'class' => $managebuttonclass));
echo html_writer::end_tag('fieldset');
echo html_writer::end_tag('form');
}
echo html_writer::end_tag('div');
}
/**
* Print course participants. Called by message_print_contact_selector()
*
* @param object $context the course context
* @param int $courseid the course ID
* @param string $contactselecturl the url to send the user to when a contact's name is clicked
* @param bool $showactionlinks show action links (add/remove contact etc) next to the users
* @param string $titletodisplay Optionally specify a title to display above the participants
* @param int $page if there are so many users listed that they have to be split into pages what page are we viewing
* @param object $user2 the user $user1 is talking to. They will be highlighted if they appear in the list of participants
* @return void
*/
function message_print_participants($context, $courseid, $contactselecturl=null, $showactionlinks=true, $titletodisplay=null, $page=0, $user2=null) {
global $DB, $USER, $PAGE, $OUTPUT;
if (empty($titletodisplay)) {
$titletodisplay = get_string('participants');
}
$countparticipants = count_enrolled_users($context);
list($esql, $params) = get_enrolled_sql($context);
$params['mcuserid'] = $USER->id;
$ufields = user_picture::fields('u');
$sql = "SELECT $ufields, mc.id as contactlistid, mc.blocked
FROM {user} u
JOIN ($esql) je ON je.id = u.id
LEFT JOIN {message_contacts} mc ON mc.contactid = u.id AND mc.userid = :mcuserid
WHERE u.deleted = 0";
$participants = $DB->get_records_sql($sql, $params, $page * MESSAGE_CONTACTS_PER_PAGE, MESSAGE_CONTACTS_PER_PAGE);
$pagingbar = new paging_bar($countparticipants, $page, MESSAGE_CONTACTS_PER_PAGE, $PAGE->url, 'page');
$pagingbar->maxdisplay = 4;
echo $OUTPUT->render($pagingbar);
echo html_writer::start_tag('div', array('id' => 'message_participants', 'class' => 'boxaligncenter'));
echo html_writer::tag('div' , $titletodisplay, array('class' => 'heading'));
$users = '';
foreach ($participants as $participant) {
if ($participant->id != $USER->id) {
$iscontact = false;
$isblocked = false;
if ( $participant->contactlistid ) {
if ($participant->blocked == 0) {
// Is contact. Is not blocked.
$iscontact = true;
$isblocked = false;
} else {
// Is blocked.
$iscontact = false;
$isblocked = true;
}
}
$participant->messagecount = 0;//todo it would be nice if the course participant could report new messages
$content = message_print_contactlist_user($participant, $iscontact, $isblocked,
$contactselecturl, $showactionlinks, $user2);
$users .= html_writer::tag('li', $content);
}
}
if (strlen($users) > 0) {
echo html_writer::tag('ul', $users, array('id' => 'message-courseparticipants', 'class' => 'message-contacts'));
}
echo html_writer::end_tag('div');
}
/**
* 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;
}
/**
* Print users blocked by $user1. Called by message_print_contact_selector()
*
* @param array $blockedusers the users blocked by $user1
* @param string $contactselecturl the url to send the user to when a contact's name is clicked
* @param bool $showactionlinks show action links (add/remove contact etc) next to the users
* @param string $titletodisplay Optionally specify a title to display above the participants
* @param object $user2 the user $user1 is talking to. They will be highlighted if they appear in the list of blocked users
* @return void
*/
function message_print_blocked_users($blockedusers, $contactselecturl=null, $showactionlinks=true, $titletodisplay=null, $user2=null) {
global $OUTPUT;
$countblocked = count($blockedusers);
echo html_writer::start_tag('div', array('id' => 'message_contacts', 'class' => 'boxaligncenter'));
if (!empty($titletodisplay)) {
echo html_writer::tag('div', $titletodisplay, array('class' => 'heading'));
}
if ($countblocked) {
echo html_writer::tag('div', get_string('blockedusers', 'message', $countblocked), array('class' => 'heading'));
$isuserblocked = true;
$isusercontact = false;
$blockeduserslist = '';
foreach ($blockedusers as $blockeduser) {
$content = message_print_contactlist_user($blockeduser, $isusercontact, $isuserblocked,
$contactselecturl, $showactionlinks, $user2);
$blockeduserslist .= html_writer::tag('li', $content);
}
echo html_writer::tag('ul', $blockeduserslist, array('id' => 'message-blockedusers', 'class' => 'message-contacts'));
}
echo html_writer::end_tag('div');
}
/**
* 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);
}
/**
* Print $user1's contacts. Called by message_print_contact_selector()
*
* @param array $onlinecontacts $user1's contacts which are online
* @param array $offlinecontacts $user1's contacts which are offline
* @param array $strangers users which are not contacts but who have messaged $user1
* @param string $contactselecturl the url to send the user to when a contact's name is clicked
* @param int $minmessages The minimum number of unread messages required from a user for them to be displayed
* Typically 0 (show all contacts) or 1 (only show contacts from whom we have a new message)
* @param bool $showactionlinks show action links (add/remove contact etc) next to the users
* @param string $titletodisplay Optionally specify a title to display above the participants
* @param object $user2 the user $user1 is talking to. They will be highlighted if they appear in the list of contacts
* @return void
*/
function message_print_contacts($onlinecontacts, $offlinecontacts, $strangers, $contactselecturl=null, $minmessages=0, $showactionlinks=true, $titletodisplay=null, $user2=null) {
global $CFG, $PAGE, $OUTPUT;
$countonlinecontacts = count($onlinecontacts);
$countofflinecontacts = count($offlinecontacts);
$countstrangers = count($strangers);
$isuserblocked = null;
if ($countonlinecontacts + $countofflinecontacts == 0) {
echo html_writer::tag('div', get_string('contactlistempty', 'message'), array('class' => 'heading'));
}
if (!empty($titletodisplay)) {
echo html_writer::tag('div', $titletodisplay, array('class' => 'heading'));
}
if($countonlinecontacts) {
// Print out list of online contacts.
if (empty($titletodisplay)) {
echo html_writer::tag('div',
get_string('onlinecontacts', 'message', $countonlinecontacts),
array('class' => 'heading'));
}
$isuserblocked = false;
$isusercontact = true;
$contacts = '';
foreach ($onlinecontacts as $contact) {
if ($minmessages == 0 || $contact->messagecount >= $minmessages) {
$content = message_print_contactlist_user($contact, $isusercontact, $isuserblocked,
$contactselecturl, $showactionlinks, $user2);
$contacts .= html_writer::tag('li', $content);
}
}
if (strlen($contacts) > 0) {
echo html_writer::tag('ul', $contacts, array('id' => 'message-onlinecontacts', 'class' => 'message-contacts'));
}
}
if ($countofflinecontacts) {
// Print out list of offline contacts.
if (empty($titletodisplay)) {
echo html_writer::tag('div',
get_string('offlinecontacts', 'message', $countofflinecontacts),
array('class' => 'heading'));
}
$isuserblocked = false;
$isusercontact = true;
$contacts = '';
foreach ($offlinecontacts as $contact) {
if ($minmessages == 0 || $contact->messagecount >= $minmessages) {
$content = message_print_contactlist_user($contact, $isusercontact, $isuserblocked,
$contactselecturl, $showactionlinks, $user2);
$contacts .= html_writer::tag('li', $content);
}
}
if (strlen($contacts) > 0) {
echo html_writer::tag('ul', $contacts, array('id' => 'message-offlinecontacts', 'class' => 'message-contacts'));
}
}
// Print out list of incoming contacts.
if ($countstrangers) {
echo html_writer::tag('div', get_string('incomingcontacts', 'message', $countstrangers), array('class' => 'heading'));
$isuserblocked = false;
$isusercontact = false;
$contacts = '';
foreach ($strangers as $stranger) {
if ($minmessages == 0 || $stranger->messagecount >= $minmessages) {
$content = message_print_contactlist_user($stranger, $isusercontact, $isuserblocked,
$contactselecturl, $showactionlinks, $user2);
$contacts .= html_writer::tag('li', $content);
}
}
if (strlen($contacts) > 0) {
echo html_writer::tag('ul', $contacts, array('id' => 'message-incommingcontacts', 'class' => 'message-contacts'));
}
}
if ($countstrangers && ($countonlinecontacts + $countofflinecontacts == 0)) { // Extra help
echo html_writer::tag('div','('.get_string('addsomecontactsincoming', 'message').')',array('class' => 'note'));
}
}
/**
* Print a select box allowing the user to choose to view new messages, course participants etc.
*
* Called by message_print_contact_selector()
* @param int $viewing What page is the user viewing ie MESSAGE_VIEW_UNREAD_MESSAGES, MESSAGE_VIEW_RECENT_CONVERSATIONS etc
* @param array $courses array of course objects. The courses the user is enrolled in.
* @param array $coursecontexts array of course contexts. Keyed on course id.
* @param int $countunreadtotal how many unread messages does the user have?
* @param int $countblocked how many users has the current user blocked?
* @param stdClass $user1 The user whose messages we are viewing.
* @param string $strunreadmessages a preconstructed message about the number of unread messages the user has
* @return void
*/
function message_print_usergroup_selector($viewing, $courses, $coursecontexts, $countunreadtotal, $countblocked, $strunreadmessages, $user1 = null) {
global $PAGE;
$options = array();
if ($countunreadtotal>0) { //if there are unread messages
$options[MESSAGE_VIEW_UNREAD_MESSAGES] = $strunreadmessages;
}
$str = get_string('contacts', 'message');
$options[MESSAGE_VIEW_CONTACTS] = $str;
$options[MESSAGE_VIEW_RECENT_CONVERSATIONS] = get_string('mostrecentconversations', 'message');
$options[MESSAGE_VIEW_RECENT_NOTIFICATIONS] = get_string('mostrecentnotifications', 'message');
if (!empty($courses)) {
$courses_options = array();
foreach($courses as $course) {
if (has_capability('moodle/course:viewparticipants', $coursecontexts[$course->id])) {
//Not using short_text() as we want the end of the course name. Not the beginning.
$shortname = format_string($course->shortname, true, array('context' => $coursecontexts[$course->id]));
if (core_text::strlen($shortname) > MESSAGE_MAX_COURSE_NAME_LENGTH) {
$courses_options[MESSAGE_VIEW_COURSE.$course->id] = '...'.core_text::substr($shortname, -MESSAGE_MAX_COURSE_NAME_LENGTH);
} else {
$courses_options[MESSAGE_VIEW_COURSE.$course->id] = $shortname;
}
}
}
if (!empty($courses_options)) {
$options[] = array(get_string('courses') => $courses_options);
}
}
if ($countblocked>0) {
$str = get_string('blockedusers','message', $countblocked);
$options[MESSAGE_VIEW_BLOCKED] = $str;
}
$select = new single_select($PAGE->url, 'viewing', $options, $viewing, false);
$select->set_label(get_string('messagenavigation', 'message'));
$renderer = $PAGE->get_renderer('core');
echo $renderer->render($select);
}
/**
* Load the course contexts for all of the users courses
*
* @param array $courses array of course objects. The courses the user is enrolled in.
* @return array of course contexts
*/
function message_get_course_contexts($courses) {
$coursecontexts = array();
foreach($courses as $course) {
$coursecontexts[$course->id] = context_course::instance($course->id);
}
return $coursecontexts;
}
/**
* strip off action parameters like 'removecontact'
*
* @param moodle_url/string $moodleurl a URL. Typically the current page URL.
* @return string the URL minus parameters that perform actions (like adding/removing/blocking a contact).
*/
function message_remove_url_params($moodleurl) {
$newurl = new moodle_url($moodleurl);
$newurl->remove_params('addcontact','removecontact','blockcontact','unblockcontact');
return $newurl->out();
}
/**
* Count the number of messages with a field having a specified value.
* if $field is empty then return count of the whole array
* if $field is non-existent then return 0
*
* @param array $messagearray array of message objects
* @param string $field the field to inspect on the message objects
* @param string $value the value to test the field against
*/
function message_count_messages($messagearray, $field='', $value='') {
if (!is_array($messagearray)) return 0;
if ($field == '' or empty($messagearray)) return count($messagearray);
$count = 0;
foreach ($messagearray as $message) {
$count += ($message->$field == $value) ? 1 : 0;
}
return $count;
}
/**
* 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')");
}
}
/**
* Count the number of users blocked by $user1
*
* @param object $user1 user object
* @return int the number of blocked users
*/
function message_count_blocked_users($user1=null) {
global $USER, $DB;
if (empty($user1)) {
$user1 = $USER;
}
$sql = "SELECT count(mc.id)
FROM {message_contacts} mc
WHERE mc.userid = :userid AND mc.blocked = 1";
$params = array('userid' => $user1->id);
return $DB->count_records_sql($sql, $params);
}
/**
* Print the search form and search results if a search has been performed
*
* @param boolean $advancedsearch show basic or advanced search form
* @param object $user1 the current user
* @return boolean true if a search was performed
*/
function message_print_search($advancedsearch = false, $user1=null) {
$frm = data_submitted();
$doingsearch = false;
if ($frm) {
if (confirm_sesskey()) {
$doingsearch = !empty($frm->combinedsubmit) || !empty($frm->keywords) || (!empty($frm->personsubmit) and !empty($frm->name));
} else {
$frm = false;
}
}
if (!empty($frm->combinedsearch)) {
$combinedsearchstring = $frm->combinedsearch;
} else {
//$combinedsearchstring = get_string('searchcombined','message').'...';
$combinedsearchstring = '';
}
if ($doingsearch) {
if ($advancedsearch) {
$messagesearch = '';
if (!empty($frm->keywords)) {
$messagesearch = $frm->keywords;
}
$personsearch = '';
if (!empty($frm->name)) {
$personsearch = $frm->name;
}
include('search_advanced.html');
} else {
include('search.html');
}
$showicontext = false;
message_print_search_results($frm, $showicontext, $user1);
return true;
} else {
if ($advancedsearch) {
$personsearch = $messagesearch = '';
include('search_advanced.html');
} else {
include('search.html');
}
return false;
}
}
/**
* 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 $user the current user
* @param int $limitfrom can be used for paging
* @param int $limitto can be used for paging
* @return array
*/
function message_get_recent_conversations($user, $limitfrom=0, $limitto=100) {
global $DB;
$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.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);
// 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 $conversation) {
if (!isset($conversations[$conversation->id])) {
$conversations[$conversation->id] = $conversation;
} else {
$current = $conversations[$conversation->id];
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;
}
/**
* Get the users recent event notifications
*
* @param object $user the current user
* @param int $limitfrom can be used for paging
* @param int $limitto can be used for paging
* @return array
*/
function message_get_recent_notifications($user, $limitfrom=0, $limitto=100) {
global $DB;
$userfields = user_picture::fields('u', array('lastaccess'));
$sql = "SELECT mr.id AS message_read_id, $userfields, mr.notification, mr.smallmessage, mr.fullmessage, mr.fullmessagehtml, mr.fullmessageformat, mr.timecreated as timecreated, mr.contexturl, mr.contexturlname
FROM {message_read} mr
JOIN {user} u ON u.id=mr.useridfrom
WHERE mr.useridto = :userid1 AND u.deleted = '0' AND mr.notification = :notification
ORDER BY mr.timecreated DESC";
$params = array('userid1' => $user->id, 'notification' => 1);
$notifications = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
return $notifications;
}
/**
* Print the user's recent conversations
*
* @param stdClass $user the current user
* @param bool $showicontext flag indicating whether or not to show text next to the action icons
*/
function message_print_recent_conversations($user1 = null, $showicontext = false, $showactionlinks = true) {
global $USER;
echo html_writer::start_tag('p', array('class' => 'heading'));
echo get_string('mostrecentconversations', 'message');
echo html_writer::end_tag('p');
if (empty($user1)) {
$user1 = $USER;
}
$conversations = message_get_recent_conversations($user1);
// Attach context url information to create the "View this conversation" type links
foreach($conversations as $conversation) {
$conversation->contexturl = new moodle_url("/message/index.php?user1={$user1->id}&user2={$conversation->id}");
$conversation->contexturlname = get_string('thisconversation', 'message');
}
$showotheruser = true;
message_print_recent_messages_table($conversations, $user1, $showotheruser, $showicontext, false, $showactionlinks);
}
/**
* Print the user's recent notifications
*
* @param stdClass $user the current user
*/
function message_print_recent_notifications($user=null) {
global $USER;
echo html_writer::start_tag('p', array('class' => 'heading'));
echo get_string('mostrecentnotifications', 'message');
echo html_writer::end_tag('p');
if (empty($user)) {
$user = $USER;
}
$notifications = message_get_recent_notifications($user);
$showicontext = false;
$showotheruser = false;
message_print_recent_messages_table($notifications, $user, $showotheruser, $showicontext, true);
}
/**
* Print a list of recent messages
*
* @access private
*
* @param array $messages the messages to display
* @param stdClass $user the current user
* @param bool $showotheruser display information on the other user?
* @param bool $showicontext show text next to the action icons?
* @param bool $forcetexttohtml Force text to go through @see text_to_html() via @see format_text()
* @param bool $showactionlinks
* @return void
*/
function message_print_recent_messages_table($messages, $user = null, $showotheruser = true, $showicontext = false, $forcetexttohtml = false, $showactionlinks = true) {
global $OUTPUT;
static $dateformat;
if (empty($dateformat)) {
$dateformat = get_string('strftimedatetimeshort');
}
echo html_writer::start_tag('div', array('class' => 'messagerecent'));
foreach ($messages as $message) {
echo html_writer::start_tag('div', array('class' => 'singlemessage'));
if ($showotheruser) {
$strcontact = $strblock = $strhistory = null;
if ($showactionlinks) {
if ( $message->contactlistid ) {
if ($message->blocked == 0) { // The other user isn't blocked.
$strcontact = message_contact_link($message->id, 'remove', true, null, $showicontext);
$strblock = message_contact_link($message->id, 'block', true, null, $showicontext);
} else { // The other user is blocked.
$strcontact = message_contact_link($message->id, 'add', true, null, $showicontext);
$strblock = message_contact_link($message->id, 'unblock', true, null, $showicontext);
}
} else {
$strcontact = message_contact_link($message->id, 'add', true, null, $showicontext);
$strblock = message_contact_link($message->id, 'block', true, null, $showicontext);
}
//should we show just the icon or icon and text?
$histicontext = 'icon';
if ($showicontext) {
$histicontext = 'both';
}
$strhistory = message_history_link($user->id, $message->id, true, '', '', $histicontext);
}
echo html_writer::start_tag('span', array('class' => 'otheruser'));
echo html_writer::start_tag('span', array('class' => 'pix'));
echo $OUTPUT->user_picture($message, array('size' => 20, 'courseid' => SITEID));
echo html_writer::end_tag('span');
echo html_writer::start_tag('span', array('class' => 'contact'));
$link = new moodle_url("/message/index.php?user1={$user->id}&user2=$message->id");
$action = null;
echo $OUTPUT->action_link($link, fullname($message), $action, array('title' => get_string('sendmessageto', 'message', fullname($message))));
echo html_writer::end_tag('span');//end contact
if ($showactionlinks) {
echo $strcontact.$strblock.$strhistory;
}
echo html_writer::end_tag('span');//end otheruser
}
$messagetext = message_format_message_text($message, $forcetexttohtml);
echo html_writer::tag('span', userdate($message->timecreated, $dateformat), array('class' => 'messagedate'));
echo html_writer::tag('span', $messagetext, array('class' => 'themessage'));
echo message_format_contexturl($message);
echo html_writer::end_tag('div');//end singlemessage
}
echo html_writer::end_tag('div');//end messagerecent
}
/**
* 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;