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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 API for core library
*
* @package core_webservice
* @category external
* @copyright 2012 Jerome Mouneyrac <jerome@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die;
require_once("$CFG->libdir/externallib.php");
/**
* Web service related functions
*
* @package core
* @category external
* @copyright 2012 Jerome Mouneyrac <jerome@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
* @since Moodle 2.4
*/
class core_external extends external_api {
/**
* Format the received string parameters to be sent to the core get_string() function.
*
* @param array $stringparams
* @return object|string
* @since Moodle 2.4
*/
public static function format_string_parameters($stringparams) {
// Check if there are some string params.
$strparams = new stdClass();
if (!empty($stringparams)) {
// There is only one string parameter.
if (count($stringparams) == 1) {
$stringparam = array_pop($stringparams);
if (isset($stringparam['name'])) {
$strparams->{$stringparam['name']} = $stringparam['value'];
} else {
// It is a not named string parameter.
$strparams = $stringparam['value'];
}
} else {
// There are more than one parameter.
foreach ($stringparams as $stringparam) {
// If a parameter is unnamed throw an exception
// unnamed param is only possible if one only param is sent.
if (empty($stringparam['name'])) {
throw new moodle_exception('unnamedstringparam', 'webservice');
}
$strparams->{$stringparam['name']} = $stringparam['value'];
}
}
}
return $strparams;
}
/**
* Returns description of get_string parameters
*
* @return external_function_parameters
* @since Moodle 2.4
*/
public static function get_string_parameters() {
return new external_function_parameters(
array('stringid' => new external_value(PARAM_STRINGID, 'string identifier'),
'component' => new external_value(PARAM_COMPONENT,'component', VALUE_DEFAULT, 'moodle'),
'lang' => new external_value(PARAM_LANG, 'lang', VALUE_DEFAULT, null),
'stringparams' => new external_multiple_structure (
new external_single_structure(array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'param name
- if the string expect only one $a parameter then don\'t send this field, just send the value.', VALUE_OPTIONAL),
'value' => new external_value(PARAM_RAW,'param value'))),
'the definition of a string param (i.e. {$a->name})', VALUE_DEFAULT, array()
)
)
);
}
/**
* Return a core get_string() call
*
* @param string $identifier string identifier
* @param string $component string component
* @param array $stringparams the string params
* @return string
* @since Moodle 2.4
*/
public static function get_string($stringid, $component = 'moodle', $lang = null, $stringparams = array()) {
$params = self::validate_parameters(self::get_string_parameters(),
array('stringid'=>$stringid, 'component' => $component, 'lang' => $lang, 'stringparams' => $stringparams));
$stringmanager = get_string_manager();
return $stringmanager->get_string($params['stringid'], $params['component'],
core_external::format_string_parameters($params['stringparams']), $params['lang']);
}
/**
* Returns description of get_string() result value
*
* @return string
* @since Moodle 2.4
*/
public static function get_string_returns() {
return new external_value(PARAM_RAW, 'translated string');
}
/**
* Returns description of get_string parameters
*
* @return external_function_parameters
* @since Moodle 2.4
*/
public static function get_strings_parameters() {
return new external_function_parameters(
array('strings' => new external_multiple_structure (
new external_single_structure (array(
'stringid' => new external_value(PARAM_STRINGID, 'string identifier'),
'component' => new external_value(PARAM_COMPONENT, 'component', VALUE_DEFAULT, 'moodle'),
'lang' => new external_value(PARAM_LANG, 'lang', VALUE_DEFAULT, null),
'stringparams' => new external_multiple_structure (
new external_single_structure(array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'param name
- if the string expect only one $a parameter then don\'t send this field, just send the value.', VALUE_OPTIONAL),
'value' => new external_value(PARAM_RAW, 'param value'))),
'the definition of a string param (i.e. {$a->name})', VALUE_DEFAULT, array()
))
)
)
)
);
}
/**
* Return multiple call to core get_string()
*
* @param array $strings strings to translate
* @return array
*
* @since Moodle 2.4
*/
public static function get_strings($strings) {
$params = self::validate_parameters(self::get_strings_parameters(),
array('strings'=>$strings));
$stringmanager = get_string_manager();
$translatedstrings = array();
foreach($params['strings'] as $string) {
if (!empty($string['lang'])) {
$lang = $string['lang'];
} else {
$lang = current_language();
}
$translatedstrings[] = array(
'stringid' => $string['stringid'],
'component' => $string['component'],
'lang' => $lang,
'string' => $stringmanager->get_string($string['stringid'], $string['component'],
core_external::format_string_parameters($string['stringparams']), $lang));
}
return $translatedstrings;
}
/**
* Returns description of get_string() result value
*
* @return array
* @since Moodle 2.4
*/
public static function get_strings_returns() {
return new external_multiple_structure(
new external_single_structure(array(
'stringid' => new external_value(PARAM_STRINGID, 'string id'),
'component' => new external_value(PARAM_COMPONENT, 'string component'),
'lang' => new external_value(PARAM_LANG, 'lang'),
'string' => new external_value(PARAM_RAW, 'translated string'))
));
}
/**
* Returns description of get_user_dates parameters
*
* @return external_function_parameters
*/
public static function get_user_dates_parameters() {
return new external_function_parameters(
[
'contextid' => new external_value(
PARAM_INT,
'Context ID. Either use this value, or level and instanceid.',
VALUE_DEFAULT,
0
),
'contextlevel' => new external_value(
PARAM_ALPHA,
'Context level. To be used with instanceid.',
VALUE_DEFAULT,
''
),
'instanceid' => new external_value(
PARAM_INT,
'Context instance ID. To be used with level',
VALUE_DEFAULT,
0
),
'timestamps' => new external_multiple_structure (
new external_single_structure (
[
'timestamp' => new external_value(PARAM_INT, 'unix timestamp'),
'format' => new external_value(PARAM_TEXT, 'format string'),
]
)
)
]
);
}
/**
* Format an array of timestamps.
*
* @param int|null $contextid The contenxt id
* @param string|null $contextlevel The context level
* @param int|null $instanceid The instnace id for the context level
* @param array $timestamps Timestamps to format
* @return array
*/
public static function get_user_dates($contextid, $contextlevel, $instanceid, $timestamps) {
$params = self::validate_parameters(
self::get_user_dates_parameters(),
[
'contextid' => $contextid,
'contextlevel' => $contextlevel,
'instanceid' => $instanceid,
'timestamps' => $timestamps,
]
);
$context = self::get_context_from_params($params);
self::validate_context($context);
$formatteddates = array_map(function($timestamp) {
return userdate($timestamp['timestamp'], $timestamp['format']);
}, $params['timestamps']);
return ['dates' => $formatteddates];
}
/**
* Returns description of get_user_dates() result value
*
* @return array
*/
public static function get_user_dates_returns() {
return new external_single_structure(
[
'dates' => new external_multiple_structure (
new external_value(PARAM_TEXT, 'formatted dates strings')
)
]
);
}
/**
* Returns description of get_component_strings parameters
*
* @return external_function_parameters
* @since Moodle 2.4
*/
public static function get_component_strings_parameters() {
return new external_function_parameters(
array('component' => new external_value(PARAM_COMPONENT, 'component'),
'lang' => new external_value(PARAM_LANG, 'lang', VALUE_DEFAULT, null),
)
);
}
/**
* Return all lang strings of a component - call to core get_component_strings().
*
* @param string $component component name
* @return array
*
* @since Moodle 2.4
*/
public static function get_component_strings($component, $lang = null) {
if (empty($lang)) {
$lang = current_language();
}
$params = self::validate_parameters(self::get_component_strings_parameters(),
array('component'=>$component, 'lang' => $lang));
$stringmanager = get_string_manager();
$wsstrings = array();
$componentstrings = $stringmanager->load_component_strings($params['component'], $params['lang']);
foreach($componentstrings as $stringid => $string) {
$wsstring = array();
$wsstring['stringid'] = $stringid;
$wsstring['string'] = $string;
$wsstrings[] = $wsstring;
}
return $wsstrings;
}
/**
* Returns description of get_component_strings() result value
*
* @return array
* @since Moodle 2.4
*/
public static function get_component_strings_returns() {
return new external_multiple_structure(
new external_single_structure(array(
'stringid' => new external_value(PARAM_STRINGID, 'string id'),
'string' => new external_value(PARAM_RAW, 'translated string'))
));
}
/**
* Returns description of get_fragment parameters
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function get_fragment_parameters() {
return new external_function_parameters(
array(
'component' => new external_value(PARAM_COMPONENT, 'Component for the callback e.g. mod_assign'),
'callback' => new external_value(PARAM_ALPHANUMEXT, 'Name of the callback to execute'),
'contextid' => new external_value(PARAM_INT, 'Context ID that the fragment is from'),
'args' => new external_multiple_structure(
new external_single_structure(
array(
'name' => new external_value(PARAM_ALPHANUMEXT, 'param name'),
'value' => new external_value(PARAM_RAW, 'param value')
)
), 'args for the callback are optional', VALUE_OPTIONAL
)
)
);
}
/**
* Get a HTML fragment for inserting into something. Initial use is for inserting mforms into
* a page using AJAX.
* This web service is designed to be called only via AJAX and not directly.
* Callbacks that are called by this web service are responsible for doing the appropriate security checks
* to access the information returned. This only does minimal validation on the context.
*
* @param string $component Name of the component.
* @param string $callback Function callback name.
* @param int $contextid Context ID this fragment is in.
* @param array $args optional arguments for the callback.
* @return array HTML and JavaScript fragments for insertion into stuff.
* @since Moodle 3.1
*/
public static function get_fragment($component, $callback, $contextid, $args = null) {
global $OUTPUT, $PAGE;
$params = self::validate_parameters(self::get_fragment_parameters(),
array(
'component' => $component,
'callback' => $callback,
'contextid' => $contextid,
'args' => $args
)
);
// Reformat arguments into something less unwieldy.
$arguments = array();
foreach ($params['args'] as $paramargument) {
$arguments[$paramargument['name']] = $paramargument['value'];
}
$context = context::instance_by_id($contextid);
self::validate_context($context);
$arguments['context'] = $context;
// Hack alert: Set a default URL to stop the annoying debug.
$PAGE->set_url('/');
// Hack alert: Forcing bootstrap_renderer to initiate moodle page.
$OUTPUT->header();
// Overwriting page_requirements_manager with the fragment one so only JS included from
// this point is returned to the user.
$PAGE->start_collecting_javascript_requirements();
$data = component_callback($params['component'], 'output_fragment_' . $params['callback'], array($arguments));
$jsfooter = $PAGE->requires->get_end_code();
$output = array('html' => $data, 'javascript' => $jsfooter);
return $output;
}
/**
* Returns description of get_fragment() result value
*
* @return array
* @since Moodle 3.1
*/
public static function get_fragment_returns() {
return new external_single_structure(
array(
'html' => new external_value(PARAM_RAW, 'HTML fragment.'),
'javascript' => new external_value(PARAM_RAW, 'JavaScript fragment')
)
);
}
/**
* Parameters for function update_inplace_editable()
*
* @since Moodle 3.1
* @return external_function_parameters
*/
public static function update_inplace_editable_parameters() {
return new external_function_parameters(
array(
'component' => new external_value(PARAM_COMPONENT, 'component responsible for the update', VALUE_REQUIRED),
'itemtype' => new external_value(PARAM_NOTAGS, 'type of the updated item inside the component', VALUE_REQUIRED),
'itemid' => new external_value(PARAM_RAW, 'identifier of the updated item', VALUE_REQUIRED),
'value' => new external_value(PARAM_RAW, 'new value', VALUE_REQUIRED),
));
}
/**
* Update any component's editable value assuming that component implements necessary callback
*
* @since Moodle 3.1
* @param string $component
* @param string $itemtype
* @param string $itemid
* @param string $value
*/
public static function update_inplace_editable($component, $itemtype, $itemid, $value) {
global $PAGE;
// Validate and normalize parameters.
$params = self::validate_parameters(self::update_inplace_editable_parameters(),
array('component' => $component, 'itemtype' => $itemtype, 'itemid' => $itemid, 'value' => $value));
if (!$functionname = component_callback_exists($component, 'inplace_editable')) {
throw new \moodle_exception('inplaceeditableerror');
}
$tmpl = component_callback($params['component'], 'inplace_editable',
array($params['itemtype'], $params['itemid'], $params['value']));
if (!$tmpl || !($tmpl instanceof \core\output\inplace_editable)) {
throw new \moodle_exception('inplaceeditableerror');
}
return $tmpl->export_for_template($PAGE->get_renderer('core'));
}
/**
* Return structure for update_inplace_editable()
*
* @since Moodle 3.1
* @return external_description
*/
public static function update_inplace_editable_returns() {
return new external_single_structure(
array(
'displayvalue' => new external_value(PARAM_RAW, 'display value (may contain link or other html tags)'),
'component' => new external_value(PARAM_NOTAGS, 'component responsible for the update', VALUE_OPTIONAL),
'itemtype' => new external_value(PARAM_NOTAGS, 'itemtype', VALUE_OPTIONAL),
'value' => new external_value(PARAM_RAW, 'value of the item as it is stored', VALUE_OPTIONAL),
'itemid' => new external_value(PARAM_RAW, 'identifier of the updated item', VALUE_OPTIONAL),
'edithint' => new external_value(PARAM_NOTAGS, 'hint for editing element', VALUE_OPTIONAL),
'editlabel' => new external_value(PARAM_NOTAGS, 'label for editing element', VALUE_OPTIONAL),
'type' => new external_value(PARAM_ALPHA, 'type of the element (text, toggle, select)', VALUE_OPTIONAL),
'options' => new external_value(PARAM_RAW, 'options of the element, format depends on type', VALUE_OPTIONAL),
'linkeverything' => new external_value(PARAM_INT, 'Should everything be wrapped in the edit link or link displayed separately', VALUE_OPTIONAL),
)
);
}
/**
* Returns description of fetch_notifications() parameters.
*
* @return external_function_parameters
* @since Moodle 3.1
*/
public static function fetch_notifications_parameters() {
return new external_function_parameters(
array(
'contextid' => new external_value(PARAM_INT, 'Context ID', VALUE_REQUIRED),
));
}
/**
* Returns description of fetch_notifications() result value.
*
* @return external_description
* @since Moodle 3.1
*/
public static function fetch_notifications_returns() {
return new external_multiple_structure(
new external_single_structure(
array(
'template' => new external_value(PARAM_RAW, 'Name of the template'),
'variables' => new external_single_structure(array(
'message' => new external_value(PARAM_RAW, 'HTML content of the Notification'),
'extraclasses' => new external_value(PARAM_RAW, 'Extra classes to provide to the tmeplate'),
'announce' => new external_value(PARAM_RAW, 'Whether to announce'),
'closebutton' => new external_value(PARAM_RAW, 'Whether to close'),
)),
)
)
);
}
/**
* Returns the list of notifications against the current session.
*
* @return array
* @since Moodle 3.1
*/
public static function fetch_notifications($contextid) {
global $PAGE;
self::validate_parameters(self::fetch_notifications_parameters(), [
'contextid' => $contextid,
]);
$context = \context::instance_by_id($contextid);
self::validate_context($context);
return \core\notification::fetch_as_array($PAGE->get_renderer('core'));
}
}