weekly release 2.3dev
[moodle.git] / mod / assign / submission / file / locallib.php
1 <?php
2 // This file is part of Moodle - http://moodle.org/
3 //
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.
8 //
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.
13 //
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/>.
17 /**
18  * This file contains the definition for the library class for file submission plugin
19  *
20  * This class provides all the functionality for the new assign module.
21  *
22  * @package assignsubmission_file
23  * @copyright 2012 NetSpot {@link http://www.netspot.com.au}
24  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25  */
27 /** Include eventslib.php */
28 require_once($CFG->libdir.'/eventslib.php');
30 defined('MOODLE_INTERNAL') || die();
31 /**
32  * File areas for file submission assignment
33  */
34 define('ASSIGN_MAX_SUBMISSION_FILES', 20);
35 define('ASSIGN_SUBMISSION_FILE_MAX_SUMMARY_FILES', 5);
36 define('ASSIGN_FILEAREA_SUBMISSION_FILES', 'submission_files');
38 /**
39  * library class for file submission plugin extending submission plugin base class
40  *
41  * @package   assignsubmission_file
42  * @copyright 2012 NetSpot {@link http://www.netspot.com.au}
43  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
44  */
45 class assign_submission_file extends assign_submission_plugin {
47     /**
48      * Get the name of the file submission plugin
49      * @return string
50      */
51     public function get_name() {
52         return get_string('file', 'assignsubmission_file');
53     }
55     /**
56      * Get file submission information from the database
57      *
58      * @param int $submissionid
59      * @return mixed
60      */
61     private function get_file_submission($submissionid) {
62         global $DB;
63         return $DB->get_record('assignsubmission_file', array('submission'=>$submissionid));
64     }
66     /**
67      * Get the default setting for file submission plugin
68      *
69      * @param MoodleQuickForm $mform The form to add elements to
70      * @return void
71      */
72     public function get_settings(MoodleQuickForm $mform) {
73         global $CFG, $COURSE;
75         $defaultmaxfilesubmissions = $this->get_config('maxfilesubmissions');
76         $defaultmaxsubmissionsizebytes = $this->get_config('maxsubmissionsizebytes');
78         $settings = array();
79         $options = array();
80         for($i = 1; $i <= ASSIGN_MAX_SUBMISSION_FILES; $i++) {
81             $options[$i] = $i;
82         }
84         $mform->addElement('select', 'assignsubmission_file_maxfiles', get_string('maxfilessubmission', 'assignsubmission_file'), $options);
85         $mform->addHelpButton('assignsubmission_file_maxfiles', 'maxfilessubmission', 'assignsubmission_file');
86         $mform->setDefault('assignsubmission_file_maxfiles', $defaultmaxfilesubmissions);
87         $mform->disabledIf('assignsubmission_file_maxfiles', 'assignsubmission_file_enabled', 'eq', 0);
89         $choices = get_max_upload_sizes($CFG->maxbytes, $COURSE->maxbytes, $CFG->assignsubmission_file_maxbytes);
90         if ($COURSE->maxbytes == 0) {
91             $choices[0] = get_string('siteuploadlimit', 'assignsubmission_file');
92         } else {
93             $choices[0] = get_string('courseuploadlimit') . ' (' . display_size($COURSE->maxbytes) . ')';
94         }
95         $settings[] = array('type' => 'select',
96                             'name' => 'maxsubmissionsizebytes',
97                             'description' => get_string('maximumsubmissionsize', 'assignsubmission_file'),
98                             'options'=> $choices,
99                             'default'=> $defaultmaxsubmissionsizebytes);
101         $mform->addElement('select', 'assignsubmission_file_maxsizebytes', get_string('maximumsubmissionsize', 'assignsubmission_file'), $choices);
102         $mform->addHelpButton('assignsubmission_file_maxsizebytes', 'maximumsubmissionsize', 'assignsubmission_file');
103         $mform->setDefault('assignsubmission_file_maxsizebytes', $defaultmaxsubmissionsizebytes);
104         $mform->disabledIf('assignsubmission_file_maxsizebytes', 'assignsubmission_file_enabled', 'eq', 0);
105     }
107     /**
108      * Save the settings for file submission plugin
109      *
110      * @param stdClass $data
111      * @return bool
112      */
113     public function save_settings(stdClass $data) {
114         $this->set_config('maxfilesubmissions', $data->assignsubmission_file_maxfiles);
115         $this->set_config('maxsubmissionsizebytes', $data->assignsubmission_file_maxsizebytes);
116         return true;
117     }
119     /**
120      * File format options
121      *
122      * @return array
123      */
124     private function get_file_options() {
125         $fileoptions = array('subdirs'=>1,
126                                 'maxbytes'=>$this->get_config('maxsubmissionsizebytes'),
127                                 'maxfiles'=>$this->get_config('maxfilesubmissions'),
128                                 'accepted_types'=>'*',
129                                 'return_types'=>FILE_INTERNAL);
130         return $fileoptions;
131     }
133     /**
134      * Add elements to submission form
135      *
136      * @param mixed $submission stdClass|null
137      * @param MoodleQuickForm $mform
138      * @param stdClass $data
139      * @return bool
140      */
141     public function get_form_elements($submission, MoodleQuickForm $mform, stdClass $data) {
143         if ($this->get_config('maxfilesubmissions') <= 0) {
144             return false;
145         }
147         $fileoptions = $this->get_file_options();
148         $submissionid = $submission ? $submission->id : 0;
151         $data = file_prepare_standard_filemanager($data, 'files', $fileoptions, $this->assignment->get_context(), 'assignsubmission_file', ASSIGN_FILEAREA_SUBMISSION_FILES, $submissionid);
152         $mform->addElement('filemanager', 'files_filemanager', '', null, $fileoptions);
153         return true;
154     }
156     /**
157      * Count the number of files
158      *
159      * @param int $submissionid
160      * @param string $area
161      * @return int
162      */
163     private function count_files($submissionid, $area) {
165         $fs = get_file_storage();
166         $files = $fs->get_area_files($this->assignment->get_context()->id, 'assignsubmission_file', $area, $submissionid, "id", false);
168         return count($files);
169     }
171     /**
172      * Save the files and trigger plagiarism plugin, if enabled, to scan the uploaded files via events trigger
173      *
174      * @param stdClass $submission
175      * @param stdClass $data
176      * @return bool
177      */
178     public function save(stdClass $submission, stdClass $data) {
179         global $USER, $DB;
181         $fileoptions = $this->get_file_options();
184         $data = file_postupdate_standard_filemanager($data, 'files', $fileoptions, $this->assignment->get_context(), 'assignsubmission_file', ASSIGN_FILEAREA_SUBMISSION_FILES, $submission->id);
187         $filesubmission = $this->get_file_submission($submission->id);
189         //plagiarism code event trigger when files are uploaded
191         $fs = get_file_storage();
192         $files = $fs->get_area_files($this->assignment->get_context()->id, 'assignsubmission_file', ASSIGN_FILEAREA_SUBMISSION_FILES, $submission->id, "id", false);
193         $count = $this->count_files($submission->id, ASSIGN_FILEAREA_SUBMISSION_FILES);
194         // send files to event system
195         // Let Moodle know that an assessable file was uploaded (eg for plagiarism detection)
196         $eventdata = new stdClass();
197         $eventdata->modulename = 'assign';
198         $eventdata->cmid = $this->assignment->get_course_module()->id;
199         $eventdata->itemid = $submission->id;
200         $eventdata->courseid = $this->assignment->get_course()->id;
201         $eventdata->userid = $USER->id;
202         if ($count > 1) {
203             $eventdata->files = $files;
204         }
205             $eventdata->file = $files;
206         events_trigger('assessable_file_uploaded', $eventdata);
209         if ($filesubmission) {
210             $filesubmission->numfiles = $this->count_files($submission->id, ASSIGN_FILEAREA_SUBMISSION_FILES);
211             return $DB->update_record('assignsubmission_file', $filesubmission);
212         } else {
213             $filesubmission = new stdClass();
214             $filesubmission->numfiles = $this->count_files($submission->id, ASSIGN_FILEAREA_SUBMISSION_FILES);
215             $filesubmission->submission = $submission->id;
216             $filesubmission->assignment = $this->assignment->get_instance()->id;
217             return $DB->insert_record('assignsubmission_file', $filesubmission) > 0;
218         }
219     }
221     /**
222      * Produce a list of files suitable for export that represent this feedback or submission
223      *
224      * @param stdClass $submission The submission
225      * @return array - return an array of files indexed by filename
226      */
227     public function get_files(stdClass $submission) {
228         $result = array();
229         $fs = get_file_storage();
231         $files = $fs->get_area_files($this->assignment->get_context()->id, 'assignsubmission_file', ASSIGN_FILEAREA_SUBMISSION_FILES, $submission->id, "timemodified", false);
233         foreach ($files as $file) {
234             $result[$file->get_filename()] = $file;
235         }
236         return $result;
237     }
239     /**
240      * Display the list of files  in the submission status table
241      *
242      * @param stdClass $submission
243      * @param bool $showviewlink Set this to true if the list of files is long
244      * @return string
245      */
246     public function view_summary(stdClass $submission, $showviewlink) {
247         $count = $this->count_files($submission->id, ASSIGN_FILEAREA_SUBMISSION_FILES);
249         // show we show a link to view all files for this plugin?
250         $showviewlink = $count > ASSIGN_SUBMISSION_FILE_MAX_SUMMARY_FILES;
251         if ($count <= ASSIGN_SUBMISSION_FILE_MAX_SUMMARY_FILES) {
252             return $this->assignment->render_area_files('assignsubmission_file', ASSIGN_FILEAREA_SUBMISSION_FILES, $submission->id);
253         } else {
254             return get_string('countfiles', 'assignsubmission_file', $count);
255         }
256     }
258     /**
259      * No full submission view - the summary contains the list of files and that is the whole submission
260      *
261      * @param stdClass $submission
262      * @return string
263      */
264     public function view(stdClass $submission) {
265         return $this->assignment->render_area_files('assignsubmission_file', ASSIGN_FILEAREA_SUBMISSION_FILES, $submission->id);
266     }
270     /**
271      * Return true if this plugin can upgrade an old Moodle 2.2 assignment of this type
272      * and version.
273      *
274      * @param string $type
275      * @param int $version
276      * @return bool True if upgrade is possible
277      */
278     public function can_upgrade($type, $version) {
280         $uploadsingletype ='uploadsingle';
281         $uploadtype ='upload';
283         if (($type == $uploadsingletype || $type == $uploadtype) && $version >= 2011112900) {
284             return true;
285         }
286         return false;
287     }
290     /**
291      * Upgrade the settings from the old assignment
292      * to the new plugin based one
293      *
294      * @param context $oldcontext - the old assignment context
295      * @param stdClass $oldassignment - the old assignment data record
296      * @param string $log record log events here
297      * @return bool Was it a success? (false will trigger rollback)
298      */
299     public function upgrade_settings(context $oldcontext,stdClass $oldassignment, & $log) {
300         if ($oldassignment->assignmenttype == 'uploadsingle') {
301             $this->set_config('maxfilesubmissions', 1);
302             $this->set_config('maxsubmissionsizebytes', $oldassignment->maxbytes);
303             return true;
304         }else {
306             $this->set_config('maxfilesubmissions', $oldassignment->var1);
307             $this->set_config('maxsubmissionsizebytes', $oldassignment->maxbytes);
308             return true;
309         }
313     }
315     /**
316      * Upgrade the submission from the old assignment to the new one
317      *
318      * @param context $oldcontext The context of the old assignment
319      * @param stdClass $oldassignment The data record for the old oldassignment
320      * @param stdClass $oldsubmission The data record for the old submission
321      * @param stdClass $submission The data record for the new submission
322      * @param string $log Record upgrade messages in the log
323      * @return bool true or false - false will trigger a rollback
324      */
325     public function upgrade(context $oldcontext, stdClass $oldassignment, stdClass $oldsubmission, stdClass $submission, & $log) {
326         global $DB;
328         $filesubmission = new stdClass();
330         $filesubmission->numfiles = $oldsubmission->numfiles;
331         $filesubmission->submission = $submission->id;
332         $filesubmission->assignment = $this->assignment->get_instance()->id;
334         if (!$DB->insert_record('assignsubmission_file', $filesubmission) > 0) {
335             $log .= get_string('couldnotconvertsubmission', 'mod_assign', $submission->userid);
336             return false;
337         }
342         // now copy the area files
343         $this->assignment->copy_area_files_for_upgrade($oldcontext->id,
344                                                         'mod_assignment',
345                                                         'submission',
346                                                         $oldsubmission->id,
347                                                         // New file area
348                                                         $this->assignment->get_context()->id,
349                                                         'assignsubmission_file',
350                                                         ASSIGN_FILEAREA_SUBMISSION_FILES,
351                                                         $submission->id);
357         return true;
358     }
360     /**
361      * The assignment has been deleted - cleanup
362      *
363      * @return bool
364      */
365     public function delete_instance() {
366         global $DB;
367         // will throw exception on failure
368         $DB->delete_records('assignsubmission_file', array('assignment'=>$this->assignment->get_instance()->id));
370         return true;
371     }
373     /**
374      * Formatting for log info
375      *
376      * @param stdClass $submission The submission
377      *
378      * @return string
379      */
380     public function format_for_log(stdClass $submission) {
381         // format the info for each submission plugin add_to_log
382         $filecount = $this->count_files($submission->id, ASSIGN_FILEAREA_SUBMISSION_FILES);
383         $fileloginfo = '';
384         $fileloginfo .= ' the number of file(s) : ' . $filecount . " file(s).<br>";
386         return $fileloginfo;
387     }
389     /**
390      * Return true if there are no submission files
391      * @param stdClass $submission
392      */
393     public function is_empty(stdClass $submission) {
394         return $this->count_files($submission->id, ASSIGN_FILEAREA_SUBMISSION_FILES) == 0;
395     }
397     /**
398      * Get file areas returns a list of areas this plugin stores files
399      * @return array - An array of fileareas (keys) and descriptions (values)
400      */
401     public function get_file_areas() {
402         return array(ASSIGN_FILEAREA_SUBMISSION_FILES=>$this->get_name());
403     }