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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 <dongsheng@moodle.com>
* @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(
'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_PATH, 'file path'),
'filename' => new external_value(PARAM_FILE, 'file name')
)
);
}
/**
* Return moodle files listing
* @param int $contextid
* @param int $component
* @param int $filearea
* @param int $itemid
* @param string $filepath
* @param string $filename
* @return array
*/
public static function get_files($contextid, $component, $filearea, $itemid, $filepath, $filename) {
global $CFG, $USER, $OUTPUT;
$fileinfo = self::validate_parameters(self::get_files_parameters(), array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid, 'filepath'=>$filepath, 'filename'=>$filename));
$browser = get_file_browser();
if (empty($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;
}
$return = array();
$return['parents'] = array();
$return['files'] = array();
if ($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;
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_FILE, ''),
'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(
'contextid' => new external_value(PARAM_INT, 'context id'),
'component' => new external_value(PARAM_ALPHAEXT, 'component'),
'filearea' => new external_value(PARAM_ALPHAEXT, 'file area'),
'itemid' => new external_value(PARAM_INT, 'associated id'),
'filepath' => new external_value(PARAM_PATH, 'file path'),
'filename' => new external_value(PARAM_FILE, 'file name'),
'filecontent' => new external_value(PARAM_TEXT, 'file content')
)
);
}
/**
* Uploading a file to moodle
*
* @param int $contextid
* @param string $component
* @param string $filearea
* @param int $itemid
* @param string $filepath
* @param string $filename
* @param string $filecontent
* @return array
*/
public static function upload($contextid, $component, $filearea, $itemid, $filepath, $filename, $filecontent) {
global $USER, $CFG;
$fileinfo = self::validate_parameters(self::upload_parameters(), array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid, 'filepath'=>$filepath, 'filename'=>$filename, 'filecontent'=>$filecontent));
if (!isset($fileinfo['filecontent'])) {
throw new moodle_exception('nofile');
}
// saving file
$dir = make_upload_directory('temp/wsupload');
if (empty($fileinfo['filename'])) {
$filename = uniqid('wsupload').'_'.time().'.tmp';
} else {
$filename = $fileinfo['filename'];
}
if (file_exists($dir.$filename)) {
$savedfilepath = $dir.uniqid('m').$filename;
} else {
$savedfilepath = $dir.$filename;
}
file_put_contents($savedfilepath, base64_decode($fileinfo['filecontent']));
unset($fileinfo['filecontent']);
if (!empty($fileinfo['filepath'])) {
$filepath = $fileinfo['filepath'];
} else {
$filepath = '/';
}
if (isset($fileinfo['itemid'])) {
// TODO: in user private area, itemid is always 0
$itemid = 0;
} else {
throw new coding_exception('itemid cannot be empty');
}
if (!empty($fileinfo['contextid'])) {
$context = get_context_instance_by_id($fileinfo['contextid']);
} else {
$context = get_system_context();
}
if (!($fileinfo['component'] == 'user' and $fileinfo['filearea'] == 'private')) {
throw new coding_exception('File can be uploaded to user private area only');
} else {
// TODO: hard-coded to use user_private area
$component = 'user';
$filearea = 'private';
}
$browser = get_file_browser();
// check existing file
if ($file = $browser->get_file_info($context, $component, $filearea, $itemid, $filepath, $filename)) {
throw new moodle_exception('fileexist');
}
// move file to filepool
if ($dir = $browser->get_file_info($context, $component, $filearea, $itemid, $filepath, '.')) {
$info = $dir->create_file_from_pathname($filename, $savedfilepath);
$params = $info->get_params();
unlink($savedfilepath);
return array(
'contextid'=>$params['contextid'],
'component'=>$params['component'],
'filearea'=>$params['filearea'],
'itemid'=>$params['itemid'],
'filepath'=>$params['filepath'],
'filename'=>$params['filename'],
'url'=>$info->get_url()
);
} else {
throw new moodle_exception('nofile');
}
}
/**
* Returns description of upload returns
* @return external_multiple_structure
*/
public static function upload_returns() {
return 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_FILE, ''),
'url' => new external_value(PARAM_TEXT, ''),
)
);
}
}