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externallib.php
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externallib.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/>.
/**
* External files API
*
* @package moodlecore
* @subpackage webservice
* @copyright 2010 Dongsheng Cai <[email protected]>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once("$CFG->libdir/externallib.php");
require_once("$CFG->libdir/filelib.php");
class moodle_file_external extends external_api {
/**
* Returns description of get_files parameters
* @return external_function_parameters
*/
public static function get_files_parameters() {
return new external_function_parameters(
array(
'params' => new external_single_structure(array(
'contextid' => new external_value(PARAM_INT, 'context id'),
'component' => new external_value(PARAM_TEXT, 'component'),
'filearea' => new external_value(PARAM_TEXT, 'file area'),
'itemid' => new external_value(PARAM_INT, 'associated id'),
'filepath' => new external_value(PARAM_RAW, 'file path'),
'filename' => new external_value(PARAM_TEXT, 'file name'),
)
)
)
);
}
/**
* Return moodle files listing
* @param array $fileinfo
* @return array
*/
public static function get_files($fileinfo) {
throw new coding_exception('File browsing api function is not implemented yet, sorry');
global $CFG, $USER, $OUTPUT;
if (empty($fileinfo['contextid'])) {
$context = get_system_context();
} else {
$context = get_context_instance_by_id($fileinfo['contextid']);
}
if (empty($fileinfo['component'])) {
$fileinfo['component'] = null;
}
if (empty($fileinfo['filearea'])) {
$fileinfo['filearea'] = null;
}
if (empty($fileinfo['itemid'])) {
$fileinfo['itemid'] = null;
}
if (empty($fileinfo['filename'])) {
$fileinfo['filename'] = null;
}
if (empty($fileinfo['filepath'])) {
$fileinfo['filepath'] = null;
}
try {
$browser = get_file_browser();
$return = array();
$return['parents'] = array();
$return['files'] = array();
$file = $browser->get_file_info($context, null, null, null, null);
if ($file = $browser->get_file_info($context, $fileinfo['component'], $fileinfo['filearea'], $fileinfo['itemid'], $fileinfo['filepath'], $fileinfo['filename'])) {
$level = $file->get_parent();
while ($level) {
$params = $level->get_params();
$params['filename'] = $level->get_visible_name();
array_unshift($return['parents'], $params);
$level = $level->get_parent();
}
$list = array();
$children = $file->get_children();
foreach ($children as $child) {
$params = $child->get_params();
if ($child->is_directory()) {
$node = array(
'contextid' => $params['contextid'],
'component' => $params['component'],
'filearea' => $params['filearea'],
'itemid' => $params['itemid'],
'filepath' => $params['filepath'],
'filename' => $child->get_visible_name(),
'url' => null,
'isdir' =>true
);
$list[] = $node;
} else {
$node = array(
'contextid' => $params['contextid'],
'component' => $params['component'],
'filearea' => $params['filearea'],
'itemid' => $params['itemid'],
'filepath' => $params['filepath'],
'filename' => $child->get_visible_name(),
'url' => $child->get_url(),
'isdir' => false
);
$list[] = $node;
}
}
}
$return['files'] = $list;
} catch (Exception $e) {
throw $e;
}
return $return;
}
/**
* Returns description of get_files returns
* @return external_multiple_structure
*/
public static function get_files_returns() {
return new external_single_structure(
array(
'parents' => new external_multiple_structure(
new external_single_structure(
array(
'contextid' => new external_value(PARAM_INT, ''),
'component' => new external_value(PARAM_ALPHAEXT, ''),
'filearea' => new external_value(PARAM_ALPHAEXT, ''),
'itemid' => new external_value(PARAM_INT, ''),
'filepath' => new external_value(PARAM_TEXT, ''),
'filename' => new external_value(PARAM_TEXT, ''),
)
)
),
'files' => new external_multiple_structure(
new external_single_structure(
array(
'contextid' => new external_value(PARAM_INT, ''),
'component' => new external_value(PARAM_ALPHAEXT, ''),
'filearea' => new external_value(PARAM_ALPHAEXT, ''),
'itemid' => new external_value(PARAM_INT, ''),
'filepath' => new external_value(PARAM_TEXT, ''),
'filename' => new external_value(PARAM_TEXT, ''),
'isdir' => new external_value(PARAM_BOOL, ''),
'url' => new external_value(PARAM_TEXT, ''),
)
)
)
)
);
}
/**
* Returns description of upload parameters
* @return external_function_parameters
*/
public static function upload_parameters() {
return new external_function_parameters(
array(
'params' => new external_single_structure(array(
'contextid' => new external_value(PARAM_INT, 'context id'),
'filearea' => new external_value(PARAM_ALPHAEXT, 'file area'),
'component' => new external_value(PARAM_ALPHAEXT, 'component'),
'itemid' => new external_value(PARAM_INT, 'associated id'),
'filepath' => new external_value(PARAM_RAW, 'file path'),
'filename' => new external_value(PARAM_TEXT, 'file name'),
'filecontent' => new external_value(PARAM_TEXT, 'file content')
)
)
)
);
}
/**
* Uploading a file to moodle
*
* @param array $fileinfo
* @return array
*/
public static function upload($fileinfo) {
global $USER, $CFG;
debug('testing');
if (!isset($fileinfo['filecontent'])) {
throw new moodle_exception('nofile');
}
// saving file
if (!file_exists($CFG->dataroot.'/temp/wsupload')) {
mkdir($CFG->dataroot.'/temp/wsupload/', 0777, true);
}
if (is_dir($CFG->dataroot.'/temp/wsupload')) {
$dir = $CFG->dataroot.'/temp/wsupload/';
}
if (empty($fileinfo['filename'])) {
$filename = uniqid('wsupload').'_'.time().'.tmp';
} else {
$filename = $fileinfo['filename'];
}
if (file_exists($dir.$filename)) {
$filename = uniqid('m').$filename;
}
$savedfilepath = $dir.$filename;
file_put_contents($savedfilepath, base64_decode($fileinfo['filecontent']));
unset($fileinfo['filecontent']);
$component = $fileinfo['component'];
//TODO: mandatory!!!
if (!empty($fileinfo['filearea'])) {
$filearea = $fileinfo['filearea'];
} else {
$filearea = null;
}
if (!empty($fileinfo['filepath'])) {
$filepath = $fileinfo['filepath'];
} else {
$filepath = '';
}
if (isset($fileinfo['itemid'])) {
$itemid = $fileinfo['itemid'];
} else {
$itemid = (int)substr(hexdec(uniqid()), 0, 9)+rand(1,100);
}
if (!empty($fileinfo['contextid'])) {
$context = get_context_instance_by_id($fileinfo['contextid']);
} else {
$context = get_system_context();
}
// TODO: we MUST obey access control restrictions here, no messing with file_storage here, the only allowed way is to use file_browser here!!!!!!!!!!!!!!!!!!!!!!!!
throw new coding_exception('File upload ext api needs to be made secure first!!!!');
$browser = get_file_browser();
// check existing file
if ($file = $fs->get_file($context->id, $component, $filearea, $itemid, $filepath, $filename)) {
throw new moodle_exception('fileexist');
}
$file_record = new object();
$file_record->contextid = $context->id;
$file_record->component = $component;
$file_record->filearea = $filearea;
$file_record->itemid = $itemid;
$file_record->filepath = $filepath;
$file_record->filename = $filename;
$file_record->userid = $USER->id;
// move file to filepool
try {
$file = $fs->create_file_from_pathname($file_record, $savedfilepath);
unlink($savedfilepath);
} catch (Exception $ex) {
throw $ex;
}
$info = $browser->get_file_info($context, $file->get_filearea(), $file->get_itemid(), $file->get_filepath(), $file->get_filename());
return array(
'filename'=>$file->get_filename(),
'filepath'=>$file->get_filepath(),
'filearea'=>$file->get_filearea(),
'url'=>$info->get_url()
);
}
/**
* Returns description of upload returns
* @return external_multiple_structure
*/
public static function upload_returns() {
return new external_single_structure(
array(
'filename' => new external_value(PARAM_TEXT, ''),
'filepath' => new external_value(PARAM_TEXT, ''),
'filearea' => new external_value(PARAM_TEXT, ''),
'url' => new external_value(PARAM_TEXT, ''),
)
);
}
}