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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/>.
/**
* External message API
*
* @package core_message
* @category external
* @copyright 2011 Jerome Mouneyrac
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once("$CFG->libdir/externallib.php");
/**
* Message external functions
*
* @package core_message
* @category external
* @copyright 2011 Jerome Mouneyrac
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.2
*/
class core_message_external extends external_api {
/**
* Returns description of method parameters
*
* @return external_function_parameters
* @since Moodle 2.2
*/
public static function send_instant_messages_parameters() {
return new external_function_parameters(
array(
'messages' => new external_multiple_structure(
new external_single_structure(
array(
'touserid' => new external_value(PARAM_INT, 'id of the user to send the private message'),
'text' => new external_value(PARAM_RAW, 'the text of the message'),
'textformat' => new external_format_value('text', VALUE_DEFAULT),
'clientmsgid' => new external_value(PARAM_ALPHANUMEXT, 'your own client id for the message. If this id is provided, the fail message id will be returned to you', VALUE_OPTIONAL),
)
)
)
)
);
}
/**
* Send private messages from the current USER to other users
*
* @param array $messages An array of message to send.
* @return array
* @since Moodle 2.2
*/
public static function send_instant_messages($messages = array()) {
global $CFG, $USER, $DB;
require_once($CFG->dirroot . "/message/lib.php");
//check if messaging is enabled
if (!$CFG->messaging) {
throw new moodle_exception('disabled', 'message');
}
// Ensure the current user is allowed to run this function
$context = context_system::instance();
self::validate_context($context);
require_capability('moodle/site:sendmessage', $context);
$params = self::validate_parameters(self::send_instant_messages_parameters(), array('messages' => $messages));
//retrieve all tousers of the messages
$receivers = array();
foreach($params['messages'] as $message) {
$receivers[] = $message['touserid'];
}
list($sqluserids, $sqlparams) = $DB->get_in_or_equal($receivers, SQL_PARAMS_NAMED, 'userid_');
$tousers = $DB->get_records_select("user", "id " . $sqluserids . " AND deleted = 0", $sqlparams);
$blocklist = array();
$contactlist = array();
$sqlparams['contactid'] = $USER->id;
$rs = $DB->get_recordset_sql("SELECT *
FROM {message_contacts}
WHERE userid $sqluserids
AND contactid = :contactid", $sqlparams);
foreach ($rs as $record) {
if ($record->blocked) {
// $record->userid is blocking current user
$blocklist[$record->userid] = true;
} else {
// $record->userid have current user as contact
$contactlist[$record->userid] = true;
}
}
$rs->close();
$canreadallmessages = has_capability('moodle/site:readallmessages', $context);
$resultmessages = array();
foreach ($params['messages'] as $message) {
$resultmsg = array(); //the infos about the success of the operation
//we are going to do some checking
//code should match /messages/index.php checks
$success = true;
//check the user exists
if (empty($tousers[$message['touserid']])) {
$success = false;
$errormessage = get_string('touserdoesntexist', 'message', $message['touserid']);
}
//check that the touser is not blocking the current user
if ($success and !empty($blocklist[$message['touserid']]) and !$canreadallmessages) {
$success = false;
$errormessage = get_string('userisblockingyou', 'message');
}
// Check if the user is a contact
//TODO MDL-31118 performance improvement - edit the function so we can pass an array instead userid
$blocknoncontacts = get_user_preferences('message_blocknoncontacts', NULL, $message['touserid']);
// message_blocknoncontacts option is on and current user is not in contact list
if ($success && empty($contactlist[$message['touserid']]) && !empty($blocknoncontacts)) {
// The user isn't a contact and they have selected to block non contacts so this message won't be sent.
$success = false;
$errormessage = get_string('userisblockingyounoncontact', 'message');
}
//now we can send the message (at least try)
if ($success) {
//TODO MDL-31118 performance improvement - edit the function so we can pass an array instead one touser object
$success = message_post_message($USER, $tousers[$message['touserid']],
$message['text'], external_validate_format($message['textformat']));
}
//build the resultmsg
if (isset($message['clientmsgid'])) {
$resultmsg['clientmsgid'] = $message['clientmsgid'];
}
if ($success) {
$resultmsg['msgid'] = $success;
} else {
// WARNINGS: for backward compatibility we return this errormessage.
// We should have thrown exceptions as these errors prevent results to be returned.
// See http://docs.moodle.org/dev/Errors_handling_in_web_services#When_to_send_a_warning_on_the_server_side .
$resultmsg['msgid'] = -1;
$resultmsg['errormessage'] = $errormessage;
}
$resultmessages[] = $resultmsg;
}
return $resultmessages;
}
/**
* Returns description of method result value
*
* @return external_description
* @since Moodle 2.2
*/
public static function send_instant_messages_returns() {
return new external_multiple_structure(
new external_single_structure(
array(
'msgid' => new external_value(PARAM_INT, 'test this to know if it succeeds: id of the created message if it succeeded, -1 when failed'),
'clientmsgid' => new external_value(PARAM_ALPHANUMEXT, 'your own id for the message', VALUE_OPTIONAL),
'errormessage' => new external_value(PARAM_TEXT, 'error message - if it failed', VALUE_OPTIONAL)
)
)
);
}
}
/**
* Deprecated message external functions
*
* @package core_message
* @copyright 2011 Jerome Mouneyrac
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.1
* @deprecated Moodle 2.2 MDL-29106 - Please do not use this class any more.
* @todo MDL-31194 This will be deleted in Moodle 2.5.
* @see core_notes_external
*/
class moodle_message_external extends external_api {
/**
* Returns description of method parameters
*
* @return external_function_parameters
* @since Moodle 2.1
* @deprecated Moodle 2.2 MDL-29106 - Please do not call this function any more.
* @todo MDL-31194 This will be deleted in Moodle 2.5.
* @see core_message_external::send_instant_messages_parameters()
*/
public static function send_instantmessages_parameters() {
return core_message_external::send_instant_messages_parameters();
}
/**
* Send private messages from the current USER to other users
*
* @param array $messages An array of message to send.
* @return array
* @since Moodle 2.1
* @deprecated Moodle 2.2 MDL-29106 - Please do not call this function any more.
* @todo MDL-31194 This will be deleted in Moodle 2.5.
* @see core_message_external::send_instant_messages()
*/
public static function send_instantmessages($messages = array()) {
return core_message_external::send_instant_messages($messages);
}
/**
* Returns description of method result value
*
* @return external_description
* @since Moodle 2.1
* @deprecated Moodle 2.2 MDL-29106 - Please do not call this function any more.
* @todo MDL-31194 This will be deleted in Moodle 2.5.
* @see core_message_external::send_instant_messages_returns()
*/
public static function send_instantmessages_returns() {
return core_message_external::send_instant_messages_returns();
}
}
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