2 // This file is part of Moodle - http://moodle.org/
4 // Moodle is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // Moodle is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
19 * external API for core library
21 * @package core_webservice
23 * @copyright 2012 Jerome Mouneyrac <jerome@moodle.com>
24 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
27 defined('MOODLE_INTERNAL') || die;
29 require_once("$CFG->libdir/externallib.php");
32 * Web service related functions
36 * @copyright 2012 Jerome Mouneyrac <jerome@moodle.com>
37 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
40 class core_external extends external_api {
44 * Format the received string parameters to be sent to the core get_string() function.
46 * @param array $stringparams
47 * @return object|string
50 public static function format_string_parameters($stringparams) {
51 // Check if there are some string params.
52 $strparams = new stdClass();
53 if (!empty($stringparams)) {
54 // There is only one string parameter.
55 if (count($stringparams) == 1) {
56 $stringparam = array_pop($stringparams);
57 if (isset($stringparam['name'])) {
58 $strparams->{$stringparam['name']} = $stringparam['value'];
60 // It is a not named string parameter.
61 $strparams = $stringparam['value'];
64 // There are more than one parameter.
65 foreach ($stringparams as $stringparam) {
67 // If a parameter is unnamed throw an exception
68 // unnamed param is only possible if one only param is sent.
69 if (empty($stringparam['name'])) {
70 throw new moodle_exception('unnamedstringparam', 'webservice');
73 $strparams->{$stringparam['name']} = $stringparam['value'];
81 * Returns description of get_string parameters
83 * @return external_function_parameters
86 public static function get_string_parameters() {
87 return new external_function_parameters(
88 array('stringid' => new external_value(PARAM_STRINGID, 'string identifier'),
89 'component' => new external_value(PARAM_COMPONENT,'component', VALUE_DEFAULT, 'moodle'),
90 'lang' => new external_value(PARAM_LANG, 'lang', VALUE_DEFAULT, null),
91 'stringparams' => new external_multiple_structure (
92 new external_single_structure(array(
93 'name' => new external_value(PARAM_ALPHANUMEXT, 'param name
94 - if the string expect only one $a parameter then don\'t send this field, just send the value.', VALUE_OPTIONAL),
95 'value' => new external_value(PARAM_TEXT,'param value'))),
96 'the definition of a string param (i.e. {$a->name})', VALUE_DEFAULT, array()
103 * Return a core get_string() call
105 * @param string $identifier string identifier
106 * @param string $component string component
107 * @param array $stringparams the string params
111 public static function get_string($stringid, $component = 'moodle', $lang = null, $stringparams = array()) {
112 $params = self::validate_parameters(self::get_string_parameters(),
113 array('stringid'=>$stringid, 'component' => $component, 'lang' => $lang, 'stringparams' => $stringparams));
115 $stringmanager = get_string_manager();
116 return $stringmanager->get_string($params['stringid'], $params['component'],
117 core_external::format_string_parameters($params['stringparams']), $params['lang']);
121 * Returns description of get_string() result value
126 public static function get_string_returns() {
127 return new external_value(PARAM_TEXT, 'translated string');
131 * Returns description of get_string parameters
133 * @return external_function_parameters
136 public static function get_strings_parameters() {
137 return new external_function_parameters(
138 array('strings' => new external_multiple_structure (
139 new external_single_structure (array(
140 'stringid' => new external_value(PARAM_STRINGID, 'string identifier'),
141 'component' => new external_value(PARAM_COMPONENT, 'component', VALUE_DEFAULT, 'moodle'),
142 'lang' => new external_value(PARAM_LANG, 'lang', VALUE_DEFAULT, null),
143 'stringparams' => new external_multiple_structure (
144 new external_single_structure(array(
145 'name' => new external_value(PARAM_ALPHANUMEXT, 'param name
146 - if the string expect only one $a parameter then don\'t send this field, just send the value.', VALUE_OPTIONAL),
147 'value' => new external_value(PARAM_TEXT, 'param value'))),
148 'the definition of a string param (i.e. {$a->name})', VALUE_DEFAULT, array()
157 * Return multiple call to core get_string()
159 * @param array $strings strings to translate
164 public static function get_strings($strings) {
165 $params = self::validate_parameters(self::get_strings_parameters(),
166 array('strings'=>$strings));
167 $stringmanager = get_string_manager();
169 $translatedstrings = array();
170 foreach($params['strings'] as $string) {
172 if (!empty($string['lang'])) {
173 $lang = $string['lang'];
175 $lang = current_language();
178 $translatedstrings[] = array(
179 'stringid' => $string['stringid'],
180 'component' => $string['component'],
182 'string' => $stringmanager->get_string($string['stringid'], $string['component'],
183 core_external::format_string_parameters($string['stringparams']), $lang));
186 return $translatedstrings;
190 * Returns description of get_string() result value
195 public static function get_strings_returns() {
196 return new external_multiple_structure(
197 new external_single_structure(array(
198 'stringid' => new external_value(PARAM_STRINGID, 'string id'),
199 'component' => new external_value(PARAM_COMPONENT, 'string component'),
200 'lang' => new external_value(PARAM_LANG, 'lang'),
201 'string' => new external_value(PARAM_TEXT, 'translated string'))
206 * Returns description of get_component_strings parameters
208 * @return external_function_parameters
211 public static function get_component_strings_parameters() {
212 return new external_function_parameters(
213 array('component' => new external_value(PARAM_COMPONENT, 'component'),
214 'lang' => new external_value(PARAM_LANG, 'lang', VALUE_DEFAULT, null),
220 * Return all lang strings of a component - call to core get_component_strings().
222 * @param string $component component name
227 public static function get_component_strings($component, $lang = null) {
230 $lang = current_language();
233 $params = self::validate_parameters(self::get_component_strings_parameters(),
234 array('component'=>$component, 'lang' => $lang));
236 $stringmanager = get_string_manager();
238 $wsstrings = array();
239 $componentstrings = $stringmanager->load_component_strings($params['component'], $params['lang']);
240 foreach($componentstrings as $stringid => $string) {
242 $wsstring['stringid'] = $stringid;
243 $wsstring['string'] = $string;
244 $wsstrings[] = $wsstring;
251 * Returns description of get_component_strings() result value
256 public static function get_component_strings_returns() {
257 return new external_multiple_structure(
258 new external_single_structure(array(
259 'stringid' => new external_value(PARAM_STRINGID, 'string id'),
260 'string' => new external_value(PARAM_RAW, 'translated string'))
265 * Returns description of get_fragment parameters
267 * @return external_function_parameters
270 public static function get_fragment_parameters() {
271 return new external_function_parameters(
273 'component' => new external_value(PARAM_COMPONENT, 'Component for the callback e.g. mod_assign'),
274 'callback' => new external_value(PARAM_ALPHANUMEXT, 'Name of the callback to execute'),
275 'contextid' => new external_value(PARAM_INT, 'Context ID that the fragment is from'),
276 'args' => new external_multiple_structure(
277 new external_single_structure(
279 'name' => new external_value(PARAM_ALPHANUMEXT, 'param name'),
280 'value' => new external_value(PARAM_RAW, 'param value')
282 ), 'args for the callback are optional', VALUE_OPTIONAL
289 * Get a HTML fragment for inserting into something. Initial use is for inserting mforms into
291 * This web service is designed to be called only via AJAX and not directly.
292 * Callbacks that are called by this web service are responsible for doing the appropriate security checks
293 * to access the information returned. This only does minimal validation on the context.
295 * @param string $component Name of the component.
296 * @param string $callback Function callback name.
297 * @param int $contextid Context ID this fragment is in.
298 * @param array $args optional arguments for the callback.
299 * @return array HTML and JavaScript fragments for insertion into stuff.
302 public static function get_fragment($component, $callback, $contextid, $args = null) {
303 global $OUTPUT, $PAGE;
305 $params = self::validate_parameters(self::get_fragment_parameters(),
307 'component' => $component,
308 'callback' => $callback,
309 'contextid' => $contextid,
314 // Reformat arguments into something less unwieldy.
315 $arguments = array();
316 foreach ($params['args'] as $paramargument) {
317 $arguments[$paramargument['name']] = $paramargument['value'];
320 $context = context::instance_by_id($contextid);
321 self::validate_context($context);
323 // Hack alert: Forcing bootstrap_renderer to initiate moodle page.
326 // Overwriting page_requirements_manager with the fragment one so only JS included from
327 // this point is returned to the user.
328 $PAGE->start_collecting_javascript_requirements();
329 $data = component_callback($params['component'], 'output_fragment_' . $params['callback'], $arguments);
330 $jsfooter = $PAGE->requires->get_end_code();
331 $output = array('html' => $data, 'javascript' => $jsfooter);
336 * Returns description of get_fragment() result value
341 public static function get_fragment_returns() {
342 return new external_single_structure(
344 'html' => new external_value(PARAM_RAW, 'HTML fragment.'),
345 'javascript' => new external_value(PARAM_RAW, 'JavaScript fragment')
351 * Parameters for function update_inplace_editable()
354 * @return external_function_parameters
356 public static function update_inplace_editable_parameters() {
357 return new external_function_parameters(
359 'component' => new external_value(PARAM_COMPONENT, 'component responsible for the update', VALUE_REQUIRED),
360 'itemtype' => new external_value(PARAM_NOTAGS, 'type of the updated item inside the component', VALUE_REQUIRED),
361 'itemid' => new external_value(PARAM_INT, 'identifier of the updated item', VALUE_REQUIRED),
362 'value' => new external_value(PARAM_RAW, 'new value', VALUE_REQUIRED),
367 * Update any component's editable value assuming that component implements necessary callback
370 * @param string $component
371 * @param string $itemtype
372 * @param string $itemid
373 * @param string $value
375 public static function update_inplace_editable($component, $itemtype, $itemid, $value) {
377 // Validate and normalize parameters.
378 $params = self::validate_parameters(self::update_inplace_editable_parameters(),
379 array('component' => $component, 'itemtype' => $itemtype, 'itemid' => $itemid, 'value' => $value));
380 if (!$functionname = component_callback_exists($component, 'inplace_editable')) {
381 throw new \moodle_exception('inplaceeditableerror');
383 $tmpl = component_callback($params['component'], 'inplace_editable',
384 array($params['itemtype'], $params['itemid'], $params['value']));
385 if (!$tmpl || !($tmpl instanceof \core\output\inplace_editable)) {
386 throw new \moodle_exception('inplaceeditableerror');
388 return $tmpl->export_for_template($PAGE->get_renderer('core'));
392 * Return structure for update_inplace_editable()
395 * @return external_description
397 public static function update_inplace_editable_returns() {
398 return new external_single_structure(
400 'displayvalue' => new external_value(PARAM_RAW, 'display value (may contain link or other html tags)'),
401 'component' => new external_value(PARAM_NOTAGS, 'component responsible for the update', VALUE_OPTIONAL),
402 'itemtype' => new external_value(PARAM_NOTAGS, 'itemtype', VALUE_OPTIONAL),
403 'value' => new external_value(PARAM_RAW, 'value of the item as it is stored', VALUE_OPTIONAL),
404 'itemid' => new external_value(PARAM_RAW, 'identifier of the updated item', VALUE_OPTIONAL),
405 'edithint' => new external_value(PARAM_NOTAGS, 'hint for editing element', VALUE_OPTIONAL),
406 'editlabel' => new external_value(PARAM_NOTAGS, 'label for editing element', VALUE_OPTIONAL),