Proyectos de Subversion Moodle

<?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/>.

/**

 * This file contains the definition for the library class for file submission plugin

 *

 * This class provides all the functionality for the new assign module.

 *

 * @package assignsubmission_file

 * @copyright 2012 NetSpot {@link http://www.netspot.com.au}

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

use core_external\external_value;

// File areas for file submission assignment.

define('ASSIGNSUBMISSION_FILE_MAXSUMMARYFILES', 5);

define('ASSIGNSUBMISSION_FILE_FILEAREA', 'submission_files');

/**

 * Library class for file submission plugin extending submission plugin base class

 *

 * @package   assignsubmission_file

 * @copyright 2012 NetSpot {@link http://www.netspot.com.au}

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class assign_submission_file extends assign_submission_plugin {

    /**

     * Get the name of the file submission plugin

     * @return string

     */

    public function get_name() {

        return get_string('file', 'assignsubmission_file');

    }

    /**

     * Get file submission information from the database

     *

     * @param int $submissionid

     * @return mixed

     */

    private function get_file_submission($submissionid) {

        global $DB;

        return $DB->get_record('assignsubmission_file', array('submission'=>$submissionid));

    }

    /**

     * Get the default setting for file submission plugin

     *

     * @param MoodleQuickForm $mform The form to add elements to

     * @return void

     */

    public function get_settings(MoodleQuickForm $mform) {

        global $CFG, $COURSE;

        if ($this->assignment->has_instance()) {

            $defaultmaxfilesubmissions = $this->get_config('maxfilesubmissions');

            $defaultmaxsubmissionsizebytes = $this->get_config('maxsubmissionsizebytes');

            $defaultfiletypes = $this->get_config('filetypeslist');

        } else {

            $defaultmaxfilesubmissions = get_config('assignsubmission_file', 'maxfiles');

            $defaultmaxsubmissionsizebytes = get_config('assignsubmission_file', 'maxbytes');

            $defaultfiletypes = get_config('assignsubmission_file', 'filetypes');

        }

        $defaultfiletypes = (string)$defaultfiletypes;

        $settings = array();

        $options = array();

        for ($i = 1; $i <= get_config('assignsubmission_file', 'maxfiles'); $i++) {

            $options[$i] = $i;

        }

        $name = get_string('maxfilessubmission', 'assignsubmission_file');

        $mform->addElement('select', 'assignsubmission_file_maxfiles', $name, $options);

        $mform->addHelpButton('assignsubmission_file_maxfiles',

                              'maxfilessubmission',

                              'assignsubmission_file');

        $mform->setDefault('assignsubmission_file_maxfiles', $defaultmaxfilesubmissions);

        $mform->hideIf('assignsubmission_file_maxfiles', 'assignsubmission_file_enabled', 'notchecked');

        $choices = get_max_upload_sizes($CFG->maxbytes,

                                        $COURSE->maxbytes,

                                        get_config('assignsubmission_file', 'maxbytes'));

        $settings[] = array('type' => 'select',

                            'name' => 'maxsubmissionsizebytes',

                            'description' => get_string('maximumsubmissionsize', 'assignsubmission_file'),

                            'options'=> $choices,

                            'default'=> $defaultmaxsubmissionsizebytes);

        $name = get_string('maximumsubmissionsize', 'assignsubmission_file');

        $mform->addElement('select', 'assignsubmission_file_maxsizebytes', $name, $choices);

        $mform->addHelpButton('assignsubmission_file_maxsizebytes',

                              'maximumsubmissionsize',

                              'assignsubmission_file');

        $mform->setDefault('assignsubmission_file_maxsizebytes', $defaultmaxsubmissionsizebytes);

        $mform->hideIf('assignsubmission_file_maxsizebytes',

                           'assignsubmission_file_enabled',

                           'notchecked');

        $name = get_string('acceptedfiletypes', 'assignsubmission_file');

        $mform->addElement('filetypes', 'assignsubmission_file_filetypes', $name);

        $mform->addHelpButton('assignsubmission_file_filetypes', 'acceptedfiletypes', 'assignsubmission_file');

        $mform->setDefault('assignsubmission_file_filetypes', $defaultfiletypes);

        $mform->hideIf('assignsubmission_file_filetypes', 'assignsubmission_file_enabled', 'notchecked');

    }

    /**

     * Save the settings for file submission plugin

     *

     * @param stdClass $data

     * @return bool

     */

    public function save_settings(stdClass $data) {

        $this->set_config('maxfilesubmissions', $data->assignsubmission_file_maxfiles);

        $this->set_config('maxsubmissionsizebytes', $data->assignsubmission_file_maxsizebytes);

        if (!empty($data->assignsubmission_file_filetypes)) {

            $this->set_config('filetypeslist', $data->assignsubmission_file_filetypes);

        } else {

            $this->set_config('filetypeslist', '');

        }

        return true;

    }

    /**

     * File format options

     *

     * @return array

     */

    private function get_file_options() {

        $fileoptions = array('subdirs' => 1,

                                'maxbytes' => $this->get_config('maxsubmissionsizebytes'),

                                'maxfiles' => $this->get_config('maxfilesubmissions'),

                                'accepted_types' => $this->get_configured_typesets(),

                                'return_types' => (FILE_INTERNAL | FILE_CONTROLLED_LINK));

        if ($fileoptions['maxbytes'] == 0) {

            // Use module default.

            $fileoptions['maxbytes'] = get_config('assignsubmission_file', 'maxbytes');

        }

        return $fileoptions;

    }

    /**

     * Add elements to submission form

     *

     * @param mixed $submission stdClass|null

     * @param MoodleQuickForm $mform

     * @param stdClass $data

     * @return bool

     */

    public function get_form_elements($submission, MoodleQuickForm $mform, stdClass $data) {

        global $OUTPUT;

        if ($this->get_config('maxfilesubmissions') <= 0) {

            return false;

        }

        $fileoptions = $this->get_file_options();

        $submissionid = $submission ? $submission->id : 0;

        $data = file_prepare_standard_filemanager($data,

                                                  'files',

                                                  $fileoptions,

                                                  $this->assignment->get_context(),

                                                  'assignsubmission_file',

                                                  ASSIGNSUBMISSION_FILE_FILEAREA,

                                                  $submissionid);

        $mform->addElement('filemanager', 'files_filemanager', $this->get_name(), null, $fileoptions);

        return true;

    }

    /**

     * Count the number of files

     *

     * @param int $submissionid

     * @param string $area

     * @return int

     */

    private function count_files($submissionid, $area) {

        $fs = get_file_storage();

        $files = $fs->get_area_files($this->assignment->get_context()->id,

                                     'assignsubmission_file',

                                     $area,

                                     $submissionid,

                                     'id',

                                     false);

        return count($files);

    }

    /**

     * Save the files and trigger plagiarism plugin, if enabled,

     * to scan the uploaded files via events trigger

     *

     * @param stdClass $submission

     * @param stdClass $data

     * @return bool

     */

    public function save(stdClass $submission, stdClass $data) {

        global $USER, $DB;

        $fileoptions = $this->get_file_options();

        $data = file_postupdate_standard_filemanager($data,

                                                     'files',

                                                     $fileoptions,

                                                     $this->assignment->get_context(),

                                                     'assignsubmission_file',

                                                     ASSIGNSUBMISSION_FILE_FILEAREA,

                                                     $submission->id);

        $filesubmission = $this->get_file_submission($submission->id);

        // Plagiarism code event trigger when files are uploaded.

        $fs = get_file_storage();

        $files = $fs->get_area_files($this->assignment->get_context()->id,

                                     'assignsubmission_file',

                                     ASSIGNSUBMISSION_FILE_FILEAREA,

                                     $submission->id,

                                     'id',

                                     false);

        $count = $this->count_files($submission->id, ASSIGNSUBMISSION_FILE_FILEAREA);

        $params = array(

            'context' => context_module::instance($this->assignment->get_course_module()->id),

            'courseid' => $this->assignment->get_course()->id,

            'objectid' => $submission->id,

            'other' => array(

                'content' => '',

                'pathnamehashes' => array_keys($files)

            )

        );

        if (!empty($submission->userid) && ($submission->userid != $USER->id)) {

            $params['relateduserid'] = $submission->userid;

        }

        if ($this->assignment->is_blind_marking()) {

            $params['anonymous'] = 1;

        }

        $event = \assignsubmission_file\event\assessable_uploaded::create($params);

        $event->set_legacy_files($files);

        $event->trigger();

        $groupname = null;

        $groupid = 0;

        // Get the group name as other fields are not transcribed in the logs and this information is important.

        if (empty($submission->userid) && !empty($submission->groupid)) {

            $groupname = $DB->get_field('groups', 'name', array('id' => $submission->groupid), MUST_EXIST);

            $groupid = $submission->groupid;

        } else {

            $params['relateduserid'] = $submission->userid;

        }

        // Unset the objectid and other field from params for use in submission events.

        unset($params['objectid']);

        unset($params['other']);

        $params['other'] = array(

            'submissionid' => $submission->id,

            'submissionattempt' => $submission->attemptnumber,

            'submissionstatus' => $submission->status,

            'filesubmissioncount' => $count,

            'groupid' => $groupid,

            'groupname' => $groupname

        );

        if ($filesubmission) {

            $filesubmission->numfiles = $this->count_files($submission->id,

                                                           ASSIGNSUBMISSION_FILE_FILEAREA);

            $updatestatus = $DB->update_record('assignsubmission_file', $filesubmission);

            $params['objectid'] = $filesubmission->id;

            $event = \assignsubmission_file\event\submission_updated::create($params);

            $event->set_assign($this->assignment);

            $event->trigger();

            return $updatestatus;

        } else {

            $filesubmission = new stdClass();

            $filesubmission->numfiles = $this->count_files($submission->id,

                                                           ASSIGNSUBMISSION_FILE_FILEAREA);

            $filesubmission->submission = $submission->id;

            $filesubmission->assignment = $this->assignment->get_instance()->id;

            $filesubmission->id = $DB->insert_record('assignsubmission_file', $filesubmission);

            $params['objectid'] = $filesubmission->id;

            $event = \assignsubmission_file\event\submission_created::create($params);

            $event->set_assign($this->assignment);

            $event->trigger();

            return $filesubmission->id > 0;

        }

    }

    /**

     * Remove files from this submission.

     *

     * @param stdClass $submission The submission

     * @return boolean

     */

    public function remove(stdClass $submission) {

        global $DB;

        $fs = get_file_storage();

        $fs->delete_area_files($this->assignment->get_context()->id,

                               'assignsubmission_file',

                               ASSIGNSUBMISSION_FILE_FILEAREA,

                               $submission->id);

        $currentsubmission = $this->get_file_submission($submission->id);

        if ($currentsubmission) {

            $currentsubmission->numfiles = 0;

            $DB->update_record('assignsubmission_file', $currentsubmission);

        }

        return true;

    }

    /**

     * Produce a list of files suitable for export that represent this feedback or submission

     *

     * @param stdClass $submission The submission

     * @param stdClass $user The user record - unused

     * @return array - return an array of files indexed by filename

     */

    public function get_files(stdClass $submission, stdClass $user) {

        $result = array();

        $fs = get_file_storage();

        $files = $fs->get_area_files($this->assignment->get_context()->id,

                                     'assignsubmission_file',

                                     ASSIGNSUBMISSION_FILE_FILEAREA,

                                     $submission->id,

                                     'timemodified, id',

                                     false);

        foreach ($files as $file) {

            // Do we return the full folder path or just the file name?

            if (isset($submission->exportfullpath) && $submission->exportfullpath == false) {

                $result[$file->get_filename()] = $file;

            } else {

                $result[$file->get_filepath().$file->get_filename()] = $file;

            }

        }

        return $result;

    }

    /**

     * Display the list of files  in the submission status table

     *

     * @param stdClass $submission

     * @param bool $showviewlink Set this to true if the list of files is long

     * @return string

     */

    public function view_summary(stdClass $submission, & $showviewlink) {

        $count = $this->count_files($submission->id, ASSIGNSUBMISSION_FILE_FILEAREA);

        // Show we show a link to view all files for this plugin?

        $showviewlink = $count > ASSIGNSUBMISSION_FILE_MAXSUMMARYFILES;

        if ($count <= ASSIGNSUBMISSION_FILE_MAXSUMMARYFILES) {

            return $this->assignment->render_area_files('assignsubmission_file',

                                                        ASSIGNSUBMISSION_FILE_FILEAREA,

                                                        $submission->id);

        } else {

            return get_string('countfiles', 'assignsubmission_file', $count);

        }

    }

    /**

     * No full submission view - the summary contains the list of files and that is the whole submission

     *

     * @param stdClass $submission

     * @return string

     */

    public function view(stdClass $submission) {

        return $this->assignment->render_area_files('assignsubmission_file',

                                                    ASSIGNSUBMISSION_FILE_FILEAREA,

                                                    $submission->id);

    }

    /**

     * Return true if this plugin can upgrade an old Moodle 2.2 assignment of this type

     * and version.

     *

     * @param string $type

     * @param int $version

     * @return bool True if upgrade is possible

     */

    public function can_upgrade($type, $version) {

        $uploadsingletype ='uploadsingle';

        $uploadtype ='upload';

        if (($type == $uploadsingletype || $type == $uploadtype) && $version >= 2011112900) {

            return true;

        }

        return false;

    }

    /**

     * Upgrade the settings from the old assignment

     * to the new plugin based one

     *

     * @param context $oldcontext - the old assignment context

     * @param stdClass $oldassignment - the old assignment data record

     * @param string $log record log events here

     * @return bool Was it a success? (false will trigger rollback)

     */

    public function upgrade_settings(context $oldcontext, stdClass $oldassignment, & $log) {

        global $DB;

        if ($oldassignment->assignmenttype == 'uploadsingle') {

            $this->set_config('maxfilesubmissions', 1);

            $this->set_config('maxsubmissionsizebytes', $oldassignment->maxbytes);

            return true;

        } else if ($oldassignment->assignmenttype == 'upload') {

            $this->set_config('maxfilesubmissions', $oldassignment->var1);

            $this->set_config('maxsubmissionsizebytes', $oldassignment->maxbytes);

            // Advanced file upload uses a different setting to do the same thing.

            $DB->set_field('assign',

                           'submissiondrafts',

                           $oldassignment->var4,

                           array('id'=>$this->assignment->get_instance()->id));

            // Convert advanced file upload "hide description before due date" setting.

            $alwaysshow = 0;

            if (!$oldassignment->var3) {

                $alwaysshow = 1;

            }

            $DB->set_field('assign',

                           'alwaysshowdescription',

                           $alwaysshow,

                           array('id'=>$this->assignment->get_instance()->id));

            return true;

        }

    }

    /**

     * Upgrade the submission from the old assignment to the new one

     *

     * @param context $oldcontext The context of the old assignment

     * @param stdClass $oldassignment The data record for the old oldassignment

     * @param stdClass $oldsubmission The data record for the old submission

     * @param stdClass $submission The data record for the new submission

     * @param string $log Record upgrade messages in the log

     * @return bool true or false - false will trigger a rollback

     */

    public function upgrade(context $oldcontext,

                            stdClass $oldassignment,

                            stdClass $oldsubmission,

                            stdClass $submission,

                            & $log) {

        global $DB;

        $filesubmission = new stdClass();

        $filesubmission->numfiles = $oldsubmission->numfiles;

        $filesubmission->submission = $submission->id;

        $filesubmission->assignment = $this->assignment->get_instance()->id;

        if (!$DB->insert_record('assignsubmission_file', $filesubmission) > 0) {

            $log .= get_string('couldnotconvertsubmission', 'mod_assign', $submission->userid);

            return false;

        }

        // Now copy the area files.

        $this->assignment->copy_area_files_for_upgrade($oldcontext->id,

                                                        'mod_assignment',

                                                        'submission',

                                                        $oldsubmission->id,

                                                        $this->assignment->get_context()->id,

                                                        'assignsubmission_file',

                                                        ASSIGNSUBMISSION_FILE_FILEAREA,

                                                        $submission->id);

        return true;

    }

    /**

     * The assignment has been deleted - cleanup

     *

     * @return bool

     */

    public function delete_instance() {

        global $DB;

        // Will throw exception on failure.

        $DB->delete_records('assignsubmission_file',

                            array('assignment'=>$this->assignment->get_instance()->id));

        return true;

    }

    /**

     * Return true if there are no submission files

     * @param stdClass $submission

     */

    public function is_empty(stdClass $submission) {

        return $this->count_files($submission->id, ASSIGNSUBMISSION_FILE_FILEAREA) == 0;

    }

    /**

     * Determine if a submission is empty

     *

     * This is distinct from is_empty in that it is intended to be used to

     * determine if a submission made before saving is empty.

     *

     * @param stdClass $data The submission data

     * @return bool

     */

    public function submission_is_empty(stdClass $data) {

        global $USER;

        $fs = get_file_storage();

        // Get a count of all the draft files, excluding any directories.

        $files = $fs->get_area_files(context_user::instance($USER->id)->id,

                                     'user',

                                     'draft',

                                     $data->files_filemanager,

                                     'id',

                                     false);

        return count($files) == 0;

    }

    /**

     * Get file areas returns a list of areas this plugin stores files

     * @return array - An array of fileareas (keys) and descriptions (values)

     */

    public function get_file_areas() {

        return array(ASSIGNSUBMISSION_FILE_FILEAREA=>$this->get_name());

    }

    /**

     * Copy the student's submission from a previous submission. Used when a student opts to base their resubmission

     * on the last submission.

     * @param stdClass $sourcesubmission

     * @param stdClass $destsubmission

     */

    public function copy_submission(stdClass $sourcesubmission, stdClass $destsubmission) {

        global $DB;

        // Copy the files across.

        $contextid = $this->assignment->get_context()->id;

        $fs = get_file_storage();

        $files = $fs->get_area_files($contextid,

                                     'assignsubmission_file',

                                     ASSIGNSUBMISSION_FILE_FILEAREA,

                                     $sourcesubmission->id,

                                     'id',

                                     false);

        foreach ($files as $file) {

            $fieldupdates = array('itemid' => $destsubmission->id);

            $fs->create_file_from_storedfile($fieldupdates, $file);

        }

        // Copy the assignsubmission_file record.

        if ($filesubmission = $this->get_file_submission($sourcesubmission->id)) {

            unset($filesubmission->id);

            $filesubmission->submission = $destsubmission->id;

            $DB->insert_record('assignsubmission_file', $filesubmission);

        }

        return true;

    }

    /**

     * Return a description of external params suitable for uploading a file submission from a webservice.

     *

     * @return \core_external\external_description|null

     */

    public function get_external_parameters() {

        return array(

            'files_filemanager' => new external_value(

                PARAM_INT,

                'The id of a draft area containing files for this submission.',

                VALUE_OPTIONAL

            )

        );

    }

    /**

     * Return the plugin configs for external functions.

     *

     * @return array the list of settings

     * @since Moodle 3.2

     */

    public function get_config_for_external() {

        global $CFG;

        $configs = $this->get_config();

        // Get a size in bytes.

        if ($configs->maxsubmissionsizebytes == 0) {

            $configs->maxsubmissionsizebytes = get_max_upload_file_size($CFG->maxbytes, $this->assignment->get_course()->maxbytes,

                                                                        get_config('assignsubmission_file', 'maxbytes'));

        }

        return (array) $configs;

    }

    /**

     * Get the type sets configured for this assignment.

     *

     * @return array('groupname', 'mime/type', ...)

     */

    private function get_configured_typesets() {

        $typeslist = (string)$this->get_config('filetypeslist');

        $util = new \core_form\filetypes_util();

        $sets = $util->normalize_file_types($typeslist);

        return $sets;

    }

    /**

     * Determine if the plugin allows image file conversion

     * @return bool

     */

    public function allow_image_conversion() {

        return true;

    }

}