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lib.php
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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
*
* @copyright Luis Rodrigues
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @package message
*/
require_once($CFG->libdir.'/eventslib.php');
define ('MESSAGE_SHORTLENGTH', 300);
//$PAGE isnt set if we're being loaded by cron which doesnt display popups anyway
if (isset($PAGE)) {
//TODO: this is a mega crazy hack - it is not acceptable to call anything when including lib!!! (skodak)
$PAGE->set_popup_notification_allowed(false); // We are in a message window (so don't pop up a new one)
}
define ('MESSAGE_DISCUSSION_WIDTH',600);
define ('MESSAGE_DISCUSSION_HEIGHT',500);
define ('MESSAGE_SHORTVIEW_LIMIT', 8);//the maximum number of messages to show on the short message history
define('MESSAGE_HISTORY_SHORT',0);
define('MESSAGE_HISTORY_ALL',1);
define('MESSAGE_VIEW_UNREAD_MESSAGES','unread');
define('MESSAGE_VIEW_RECENT_CONVERSATIONS','recentconversations');
define('MESSAGE_VIEW_RECENT_NOTIFICATIONS','recentnotifications');
define('MESSAGE_VIEW_CONTACTS','contacts');
define('MESSAGE_VIEW_BLOCKED','blockedusers');
define('MESSAGE_VIEW_COURSE','course_');
define('MESSAGE_VIEW_SEARCH','search');
define('MESSAGE_SEARCH_MAX_RESULTS', 200);
define('MESSAGE_CONTACTS_PER_PAGE',10);
define('MESSAGE_MAX_COURSE_NAME_LENGTH', 30);
/**
* Define contants for messaging default settings population. For unambiguity of
* plugin developer intentions we use 4-bit value (LSB numbering):
* bit 0 - whether to send message when user is loggedin (MESSAGE_DEFAULT_LOGGEDIN)
* bit 1 - whether to send message when user is loggedoff (MESSAGE_DEFAULT_LOGGEDOFF)
* bit 2..3 - messaging permission (MESSAGE_DISALLOWED|MESSAGE_PERMITTED|MESSAGE_FORCED)
*
* MESSAGE_PERMITTED_MASK contains the mask we use to distinguish permission setting
*/
define('MESSAGE_DEFAULT_LOGGEDIN', 0x01); // 0001
define('MESSAGE_DEFAULT_LOGGEDOFF', 0x02); // 0010
define('MESSAGE_DISALLOWED', 0x04); // 0100
define('MESSAGE_PERMITTED', 0x08); // 1000
define('MESSAGE_FORCED', 0x0c); // 1100
define('MESSAGE_PERMITTED_MASK', 0x0c); // 1100
/**
* Set default value for default outputs permitted setting
*/
define('MESSAGE_DEFAULT_PERMITTED', 'permitted');
//TODO: defaults must be initialised via settings - this is a bad hack! (skodak)
if (!isset($CFG->message_contacts_refresh)) { // Refresh the contacts list every 60 seconds
$CFG->message_contacts_refresh = 60;
}
if (!isset($CFG->message_chat_refresh)) { // Look for new comments every 5 seconds
$CFG->message_chat_refresh = 5;
}
if (!isset($CFG->message_offline_time)) {
$CFG->message_offline_time = 300;
}
/**
* 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 $showcontactactionlinks show action links (add/remove contact etc) next to the users in the contact selector
* @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, $showcontactactionlinks, $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), $strunreadmessages);
if ($viewing == MESSAGE_VIEW_UNREAD_MESSAGES) {
message_print_contacts($onlinecontacts, $offlinecontacts, $strangers, $PAGE->url, 1, $showcontactactionlinks,$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, $showcontactactionlinks, $strunreadmessages, $user2);
} else if ($viewing == MESSAGE_VIEW_BLOCKED) {
message_print_blocked_users($blockedusers, $PAGE->url, $showcontactactionlinks, 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, $showcontactactionlinks, null, $page, $user2);
} else {
//shouldn't get here. User trying to access a course they're not in perhaps.
add_to_log(SITEID, 'message', 'view', 'index.php', $viewing);
}
}
echo html_writer::start_tag('form', array('action' => 'index.php','method' => 'GET'));
echo html_writer::start_tag('fieldset');
$managebuttonclass = 'visible';
if ($viewing == MESSAGE_VIEW_SEARCH) {
$managebuttonclass = 'hiddenelement';
}
$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);
$participants = get_enrolled_users($context, '', 0, 'u.*', '', $page*MESSAGE_CONTACTS_PER_PAGE, MESSAGE_CONTACTS_PER_PAGE);
$pagingbar = new paging_bar($countparticipants, $page, MESSAGE_CONTACTS_PER_PAGE, $PAGE->url, 'page');
echo $OUTPUT->render($pagingbar);
echo html_writer::start_tag('table', array('id' => 'message_participants', 'class' => 'boxaligncenter', 'cellspacing' => '2', 'cellpadding' => '0', 'border' => '0'));
echo html_writer::start_tag('tr');
echo html_writer::tag('td', $titletodisplay, array('colspan' => 3, 'class' => 'heading'));
echo html_writer::end_tag('tr');
//todo these need to come from somewhere if the course participants list is to show users with unread messages
$iscontact = true;
$isblocked = false;
foreach ($participants as $participant) {
if ($participant->id != $USER->id) {
$participant->messagecount = 0;//todo it would be nice if the course participant could report new messages
message_print_contactlist_user($participant, $iscontact, $isblocked, $contactselecturl, $showactionlinks, $user2);
}
}
echo html_writer::end_tag('table');
}
/**
* 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 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 $DB, $USER;
$countblocked = count($blockedusers);
echo html_writer::start_tag('table', array('id' => 'message_contacts', 'class' => 'boxaligncenter'));
if (!empty($titletodisplay)) {
echo html_writer::start_tag('tr');
echo html_writer::tag('td', $titletodisplay, array('colspan' => 3, 'class' => 'heading'));
echo html_writer::end_tag('tr');
}
if ($countblocked) {
echo html_writer::start_tag('tr');
echo html_writer::tag('td', get_string('blockedusers', 'message', $countblocked), array('colspan' => 3, 'class' => 'heading'));
echo html_writer::end_tag('tr');
$isuserblocked = true;
$isusercontact = false;
foreach ($blockedusers as $blockeduser) {
message_print_contactlist_user($blockeduser, $isusercontact, $isuserblocked, $contactselecturl, $showactionlinks, $user2);
}
}
echo html_writer::end_tag('table');
}
/**
* 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 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 mc.id IS NULL AND m.useridto = ?
GROUP BY $userfields
ORDER BY u.firstname ASC";
$rs = $DB->get_recordset_sql($strangersql, array($USER->id));
foreach ($rs as $rd) {
$strangers[] = $rd;
}
$rs->close();
return array($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 + $countofflinecontacts == 0) {
echo html_writer::tag('div', get_string('contactlistempty', 'message'), array('class' => 'heading'));
}
echo html_writer::start_tag('table', array('id' => 'message_contacts', 'class' => 'boxaligncenter'));
if (!empty($titletodisplay)) {
message_print_heading($titletodisplay);
}
if($countonlinecontacts) {
/// print out list of online contacts
if (empty($titletodisplay)) {
message_print_heading(get_string('onlinecontacts', 'message', $countonlinecontacts));
}
$isuserblocked = false;
$isusercontact = true;
foreach ($onlinecontacts as $contact) {
if ($minmessages == 0 || $contact->messagecount >= $minmessages) {
message_print_contactlist_user($contact, $isusercontact, $isuserblocked, $contactselecturl, $showactionlinks, $user2);
}
}
}
if ($countofflinecontacts) {
/// print out list of offline contacts
if (empty($titletodisplay)) {
message_print_heading(get_string('offlinecontacts', 'message', $countofflinecontacts));
}
$isuserblocked = false;
$isusercontact = true;
foreach ($offlinecontacts as $contact) {
if ($minmessages == 0 || $contact->messagecount >= $minmessages) {
message_print_contactlist_user($contact, $isusercontact, $isuserblocked, $contactselecturl, $showactionlinks, $user2);
}
}
}
/// print out list of incoming contacts
if ($countstrangers) {
message_print_heading(get_string('incomingcontacts', 'message', $countstrangers));
$isuserblocked = false;
$isusercontact = false;
foreach ($strangers as $stranger) {
if ($minmessages == 0 || $stranger->messagecount >= $minmessages) {
message_print_contactlist_user($stranger, $isusercontact, $isuserblocked, $contactselecturl, $showactionlinks, $user2);
}
}
}
echo html_writer::end_tag('table');
if ($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 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) {
$options = array();
$textlib = textlib_get_instance(); // going to use textlib services
if ($countunreadtotal>0) { //if there are unread messages
$options[MESSAGE_VIEW_UNREAD_MESSAGES] = $strunreadmessages;
}
$str = get_string('mycontacts', '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 ($textlib->strlen($shortname) > MESSAGE_MAX_COURSE_NAME_LENGTH) {
$courses_options[MESSAGE_VIEW_COURSE.$course->id] = '...'.$textlib->substr($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] = $str;
}
echo html_writer::start_tag('form', array('id' => 'usergroupform','method' => 'get','action' => ''));
echo html_writer::start_tag('fieldset');
echo html_writer::select($options, 'viewing', $viewing, false, array('id' => 'viewing','onchange' => 'this.form.submit()'));
echo html_writer::end_tag('fieldset');
echo html_writer::end_tag('form');
}
/**
* 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] = get_context_instance(CONTEXT_COURSE, $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('u', array('lastaccess'));
//This query retrieves the last message received from and sent to each user
//It unions that data then, within that set, it finds the most recent message you've exchanged with each user over all
//It then joins with some other tables to get some additional data we need
//message ID is used instead of timecreated as it should sort the same and will be much faster
//There is a separate query for read and unread queries 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
$sql = "SELECT $userfields, mr.id as mid, mr.smallmessage, mr.fullmessage, mr.timecreated, mc.id as contactlistid, mc.blocked
FROM {message_read} mr
JOIN (
SELECT messages.userid AS userid, MAX(messages.mid) AS mid
FROM (
SELECT mr1.useridto AS userid, MAX(mr1.id) AS mid
FROM {message_read} mr1
WHERE mr1.useridfrom = :userid1
AND mr1.notification = 0
GROUP BY mr1.useridto
UNION
SELECT mr2.useridfrom AS userid, MAX(mr2.id) AS mid
FROM {message_read} mr2
WHERE mr2.useridto = :userid2
AND mr2.notification = 0
GROUP BY mr2.useridfrom
) messages
GROUP BY messages.userid
) messages2 ON mr.id = messages2.mid AND (mr.useridto = messages2.userid OR mr.useridfrom = messages2.userid)
JOIN {user} u ON u.id = messages2.userid
LEFT JOIN {message_contacts} mc ON mc.userid = :userid3 AND mc.contactid = u.id
WHERE u.deleted = '0'
ORDER BY mr.id DESC";
$params = array('userid1' => $user->id, 'userid2' => $user->id, 'userid3' => $user->id);
$read = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
$sql = "SELECT $userfields, m.id as mid, m.smallmessage, m.fullmessage, m.timecreated, mc.id as contactlistid, mc.blocked
FROM {message} m
JOIN (
SELECT messages.userid AS userid, MAX(messages.mid) AS mid
FROM (
SELECT m1.useridto AS userid, MAX(m1.id) AS mid
FROM {message} m1
WHERE m1.useridfrom = :userid1
AND m1.notification = 0
GROUP BY m1.useridto
UNION
SELECT m2.useridfrom AS userid, MAX(m2.id) AS mid
FROM {message} m2
WHERE m2.useridto = :userid2
AND m2.notification = 0
GROUP BY m2.useridfrom
) messages
GROUP BY messages.userid
) messages2 ON m.id = messages2.mid AND (m.useridto = messages2.userid OR m.useridfrom = messages2.userid)
JOIN {user} u ON u.id = messages2.userid
LEFT JOIN {message_contacts} mc ON mc.userid = :userid3 AND mc.contactid = u.id
WHERE u.deleted = '0'
ORDER BY m.id DESC";
$unread = $DB->get_records_sql($sql, $params, $limitfrom, $limitto);
$conversations = array();
//Union the 2 result sets together looking for the message with the most recent timecreated for each other user
//$conversation->id (the array key) is the other user's ID
$conversation_arrays = array($unread, $read);
foreach ($conversation_arrays as $conversation_array) {
foreach ($conversation_array as $conversation) {
if (empty($conversations[$conversation->id]) || $conversations[$conversation->id]->timecreated < $conversation->timecreated ) {
$conversations[$conversation->id] = $conversation;
}
}
}
//Sort the conversations. This is a bit complicated as we need to sort by $conversation->timecreated
//and there may be multiple conversations with the same timecreated value.
//The conversations array contains both read and unread messages (different tables) so sorting by ID won't work
usort($conversations, "conversationsort");
return $conversations;
}
/**
* Sort function used to order conversations
*
* @param object $a A conversation object
* @param object $b A conversation object
* @return integer
*/
function conversationsort($a, $b)
{
if ($a->timecreated == $b->timecreated) {
return 0;
}
return ($a->timecreated > $b->timecreated) ? -1 : 1;
}
/**
* 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.smallmessage, mr.fullmessage, 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.id DESC";//ordering by id should give the same result as ordering by timecreated but will be faster
$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 object $user1 the current user
* @param bool $showicontext flag indicating whether or not to show text next to the action icons
* @return void
*/
function message_print_recent_conversations($user=null, $showicontext=false) {
global $USER;
echo html_writer::start_tag('p', array('class' => 'heading'));
echo get_string('mostrecentconversations', 'message');
echo html_writer::end_tag('p');
if (empty($user)) {
$user = $USER;
}
$conversations = message_get_recent_conversations($user);
// Attach context url information to create the "View this conversation" type links
foreach($conversations as $conversation) {
$conversation->contexturl = new moodle_url("/message/index.php?user2={$conversation->id}");
$conversation->contexturlname = get_string('thisconversation', 'message');
}
$showotheruser = true;
message_print_recent_messages_table($conversations, $user, $showotheruser, $showicontext);
}
/**
* Print the user's recent notifications
*
* @param object $user1 the current user
* @return void
*/
function message_print_recent_notifications($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);
}
/**
* Print a list of recent messages
*
* @staticvar type $dateformat
* @param array $messages the messages to display
* @param object $user the current user
* @param bool $showotheruser display information on the other user?
* @param bool $showicontext show text next to the action icons?
* @return void
*/
function message_print_recent_messages_table($messages, $user=null, $showotheruser=true, $showicontext=false) {
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) {
if ( $message->contactlistid ) {
if ($message->blocked == 0) { /// not blocked
$strcontact = message_contact_link($message->id, 'remove', true, null, $showicontext);
$strblock = message_contact_link($message->id, 'block', true, null, $showicontext);
} else { // 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'));
$link = new moodle_url("/message/index.php?id=$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
echo $strcontact.$strblock.$strhistory;
echo html_writer::end_tag('span');//end otheruser
}
$messagetoprint = null;
if (!empty($message->smallmessage)) {
$messagetoprint = $message->smallmessage;
} else {
$messagetoprint = $message->fullmessage;
}
echo html_writer::tag('span', userdate($message->timecreated, $dateformat), array('class' => 'messagedate'));
echo html_writer::tag('span', format_text($messagetoprint, FORMAT_HTML), array('class' => 'themessage'));
echo message_format_contexturl($message);
echo html_writer::end_tag('div');//end singlemessage
}
echo html_writer::end_tag('div');//end messagerecent
}
/**
* 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
* @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) {
global $USER, $DB;
if (!$DB->record_exists('user', array('id' => $contactid))) { // invalid userid
return false;
}
if (($contact = $DB->get_record('message_contacts', array('userid' => $USER->id, 'contactid' => $contactid))) !== false) {
/// record already exists - we may be changing blocking status
if ($contact->blocked !== $blocked) {
/// change to blocking status
$contact->blocked = $blocked;
return $DB->update_record('message_contacts', $contact);
} else {
/// no changes to blocking status
return true;
}
} else {
/// new contact record
$contact = new stdClass();
$contact->userid = $USER->id;
$contact->contactid = $contactid;
$contact->blocked = $blocked;
return $DB->insert_record('message_contacts', $contact, false);
}
}
/**
* remove a contact
*
* @param type $contactid the user ID of the contact to remove
* @return bool returns the result of delete_records()
*/
function message_remove_contact($contactid) {
global $USER, $DB;
return $DB->delete_records('message_contacts', array('userid' => $USER->id, 'contactid' => $contactid));
}
/**
* Unblock a contact. Note that this reverts the previously blocked user back to a non-contact.
*
* @param int $contactid the user ID of the contact to unblock
* @return bool returns the result of delete_records()
*/
function message_unblock_contact($contactid) {
global $USER, $DB;
return $DB->delete_records('message_contacts', array('userid' => $USER->id, 'contactid' => $contactid));
}
/**
* block a user
*
* @param int $contactid the user ID of the user to block
*/
function message_block_contact($contactid) {
return message_add_contact($contactid, 1);
}
/**
* Load a user's contact record
*
* @param int $contactid the user ID of the user whose contact record you want
* @return array message contacts