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576 lines
22 KiB
576 lines
22 KiB
2 years ago
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* functions used by AICC packages.
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*
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* @package mod_scorm
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* @copyright 1999 onwards Roberto Pinna
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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function scorm_add_time($a, $b) {
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$aes = explode(':', $a);
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$bes = explode(':', $b);
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$aseconds = explode('.', $aes[2]);
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$bseconds = explode('.', $bes[2]);
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$change = 0;
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$acents = 0; // Cents.
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if (count($aseconds) > 1) {
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$acents = $aseconds[1];
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}
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$bcents = 0;
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if (count($bseconds) > 1) {
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$bcents = $bseconds[1];
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}
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$cents = $acents + $bcents;
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$change = floor($cents / 100);
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$cents = $cents - ($change * 100);
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if (floor($cents) < 10) {
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$cents = '0'. $cents;
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}
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$secs = $aseconds[0] + $bseconds[0] + $change; // Seconds.
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$change = floor($secs / 60);
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$secs = $secs - ($change * 60);
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if (floor($secs) < 10) {
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$secs = '0'. $secs;
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}
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$mins = $aes[1] + $bes[1] + $change; // Minutes.
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$change = floor($mins / 60);
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$mins = $mins - ($change * 60);
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if ($mins < 10) {
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$mins = '0' . $mins;
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}
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$hours = $aes[0] + $bes[0] + $change; // Hours.
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if ($hours < 10) {
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$hours = '0' . $hours;
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}
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if ($cents != '0') {
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return $hours . ":" . $mins . ":" . $secs . '.' . $cents;
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} else {
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return $hours . ":" . $mins . ":" . $secs;
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}
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}
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/**
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* Take the header row of an AICC definition file
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* and returns sequence of columns and a pointer to
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* the sco identifier column.
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*
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* @param string $row AICC header row
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* @param string $mastername AICC sco identifier column
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* @return mixed
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*/
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function scorm_get_aicc_columns($row, $mastername='system_id') {
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$tok = strtok(strtolower($row), "\",\n\r");
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$result = new stdClass();
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$result->columns = array();
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$result->mastercol = 0;
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$i = 0;
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while ($tok) {
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if ($tok != '') {
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$result->columns[] = $tok;
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if ($tok == $mastername) {
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$result->mastercol = $i;
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}
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$i++;
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}
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$tok = strtok("\",\n\r");
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}
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return $result;
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}
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/**
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* Given a colums array return a string containing the regular
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* expression to match the columns in a text row.
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*
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* @param array $column The header columns
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* @param string $remodule The regular expression module for a single column
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* @return string
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*/
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function scorm_forge_cols_regexp($columns, $remodule='(".*")?,') {
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$regexp = '/^';
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foreach ($columns as $column) {
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$regexp .= $remodule;
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}
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$regexp = substr($regexp, 0, -1) . '/';
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return $regexp;
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}
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/**
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* Sets up AICC packages
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* Called whenever package changes
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* @param object $scorm instance - fields are updated and changes saved into database
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* @return bool
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*/
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function scorm_parse_aicc(&$scorm) {
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global $DB;
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if ($scorm->scormtype == SCORM_TYPE_AICCURL) {
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return scorm_aicc_generate_simple_sco($scorm);
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}
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if (!isset($scorm->cmid)) {
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$cm = get_coursemodule_from_instance('scorm', $scorm->id);
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$scorm->cmid = $cm->id;
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}
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$context = context_module::instance($scorm->cmid);
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$fs = get_file_storage();
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$files = $fs->get_area_files($context->id, 'mod_scorm', 'content', 0, 'sortorder, itemid, filepath, filename', false);
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$version = 'AICC';
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$ids = array();
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$courses = array();
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$extaiccfiles = array('crs', 'des', 'au', 'cst', 'ort', 'pre', 'cmp');
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foreach ($files as $file) {
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$filename = $file->get_filename();
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$ext = substr($filename, strrpos($filename, '.'));
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$extension = strtolower(substr($ext, 1));
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if (in_array($extension, $extaiccfiles)) {
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$id = strtolower(basename($filename, $ext));
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if (!isset($ids[$id])) {
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$ids[$id] = new stdClass();
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}
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$ids[$id]->$extension = $file;
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}
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}
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foreach ($ids as $courseid => $id) {
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if (!isset($courses[$courseid])) {
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$courses[$courseid] = new stdClass();
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}
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if (isset($id->crs)) {
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$contents = $id->crs->get_content();
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$rows = explode("\r\n", $contents);
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if (is_array($rows)) {
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foreach ($rows as $row) {
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if (preg_match("/^(.+)=(.+)$/", $row, $matches)) {
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switch (strtolower(trim($matches[1]))) {
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case 'course_id':
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$courses[$courseid]->id = trim($matches[2]);
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break;
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case 'course_title':
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$courses[$courseid]->title = trim($matches[2]);
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break;
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case 'version':
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$courses[$courseid]->version = 'AICC_'.trim($matches[2]);
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break;
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}
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}
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}
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}
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}
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if (isset($id->des)) {
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$contents = $id->des->get_content();
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$rows = explode("\r\n", $contents);
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$columns = scorm_get_aicc_columns($rows[0]);
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$regexp = scorm_forge_cols_regexp($columns->columns);
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for ($i = 1; $i < count($rows); $i++) {
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if (preg_match($regexp, $rows[$i], $matches)) {
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for ($j = 0; $j < count($columns->columns); $j++) {
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$column = $columns->columns[$j];
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if (!isset($courses[$courseid]->elements[substr(trim($matches[$columns->mastercol + 1]), 1 , -1)])) {
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$courses[$courseid]->elements[substr(trim($matches[$columns->mastercol + 1]), 1 , -1)] = new stdClass();
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}
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$courses[$courseid]->elements[substr(trim($matches[$columns->mastercol + 1]), 1 , -1)]->$column = substr(trim($matches[$j + 1]), 1, -1);
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}
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}
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}
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}
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if (isset($id->au)) {
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$contents = $id->au->get_content();
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$rows = explode("\r\n", $contents);
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$columns = scorm_get_aicc_columns($rows[0]);
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$regexp = scorm_forge_cols_regexp($columns->columns);
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for ($i = 1; $i < count($rows); $i++) {
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if (preg_match($regexp, $rows[$i], $matches)) {
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for ($j = 0; $j < count($columns->columns); $j++) {
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$column = $columns->columns[$j];
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$courses[$courseid]->elements[substr(trim($matches[$columns->mastercol + 1]), 1, -1)]->$column = substr(trim($matches[$j + 1]), 1, -1);
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}
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}
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}
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}
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if (isset($id->cst)) {
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$contents = $id->cst->get_content();
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$rows = explode("\r\n", $contents);
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$columns = scorm_get_aicc_columns($rows[0], 'block');
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$regexp = scorm_forge_cols_regexp($columns->columns, '(.+)?,');
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for ($i = 1; $i < count($rows); $i++) {
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if (preg_match($regexp, $rows[$i], $matches)) {
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for ($j = 0; $j < count($columns->columns); $j++) {
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if ($j != $columns->mastercol) {
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$element = substr(trim($matches[$j + 1]), 1 , -1);
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if (!empty($element)) {
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$courses[$courseid]->elements[$element]->parent = substr(trim($matches[$columns->mastercol + 1]), 1, -1);
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}
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}
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}
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}
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}
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}
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if (isset($id->ort)) {
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$contents = $id->ort->get_content();
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$rows = explode("\r\n", $contents);
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$columns = scorm_get_aicc_columns($rows[0], 'course_element');
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$regexp = scorm_forge_cols_regexp($columns->columns, '(.+)?,');
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for ($i = 1; $i < count($rows); $i++) {
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if (preg_match($regexp, $rows[$i], $matches)) {
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for ($j = 0; $j < count($matches) - 1; $j++) {
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if ($j != $columns->mastercol) {
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$courses[$courseid]->elements[substr(trim($matches[$j + 1]), 1, -1)]->parent = substr(trim($matches[$columns->mastercol + 1]), 1, -1);
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}
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}
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}
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}
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}
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if (isset($id->pre)) {
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$contents = $id->pre->get_content();
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$rows = explode("\r\n", $contents);
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$columns = scorm_get_aicc_columns($rows[0], 'structure_element');
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$regexp = scorm_forge_cols_regexp($columns->columns, '(.+),');
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for ($i = 1; $i < count($rows); $i++) {
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if (preg_match($regexp, $rows[$i], $matches)) {
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$elementid = trim($matches[$columns->mastercol + 1]);
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$elementid = trim(trim($elementid, '"'), "'"); // Remove any quotes.
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$prereq = trim($matches[2 - $columns->mastercol]);
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$prereq = trim(trim($prereq, '"'), "'"); // Remove any quotes.
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$courses[$courseid]->elements[$elementid]->prerequisites = $prereq;
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}
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}
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}
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if (isset($id->cmp)) {
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$contents = $id->cmp->get_content();
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$rows = explode("\r\n", $contents);
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}
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}
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$oldscoes = $DB->get_records('scorm_scoes', array('scorm' => $scorm->id));
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$sortorder = 0;
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$launch = 0;
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if (isset($courses)) {
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foreach ($courses as $course) {
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$sortorder++;
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$sco = new stdClass();
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$sco->identifier = $course->id;
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$sco->scorm = $scorm->id;
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$sco->organization = '';
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$sco->title = $course->title;
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$sco->parent = '/';
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$sco->launch = '';
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$sco->scormtype = '';
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$sco->sortorder = $sortorder;
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if ($ss = $DB->get_record('scorm_scoes', array('scorm' => $scorm->id,
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'identifier' => $sco->identifier))) {
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$id = $ss->id;
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$sco->id = $id;
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$DB->update_record('scorm_scoes', $sco);
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unset($oldscoes[$id]);
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} else {
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$id = $DB->insert_record('scorm_scoes', $sco);
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}
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if ($launch == 0) {
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$launch = $id;
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}
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if (isset($course->elements)) {
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foreach ($course->elements as $element) {
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unset($sco);
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$sco = new stdClass();
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$sco->identifier = $element->system_id;
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$sco->scorm = $scorm->id;
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$sco->organization = $course->id;
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$sco->title = $element->title;
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if (!isset($element->parent)) {
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$sco->parent = '/';
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} else if (strtolower($element->parent) == 'root') {
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$sco->parent = $course->id;
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} else {
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$sco->parent = $element->parent;
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}
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$sco->launch = '';
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$sco->scormtype = '';
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$sco->previous = 0;
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$sco->next = 0;
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$id = null;
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// Is it an Assignable Unit (AU)?
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if (isset($element->file_name)) {
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$sco->launch = $element->file_name;
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$sco->scormtype = 'sco';
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}
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if ($oldscoid = scorm_array_search('identifier', $sco->identifier, $oldscoes)) {
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$sco->id = $oldscoid;
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$DB->update_record('scorm_scoes', $sco);
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$id = $oldscoid;
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$DB->delete_records('scorm_scoes_data', array('scoid' => $oldscoid));
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unset($oldscoes[$oldscoid]);
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} else {
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$id = $DB->insert_record('scorm_scoes', $sco);
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}
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if (!empty($id)) {
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$scodata = new stdClass();
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$scodata->scoid = $id;
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if (isset($element->web_launch)) {
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$scodata->name = 'parameters';
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$scodata->value = $element->web_launch;
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$dataid = $DB->insert_record('scorm_scoes_data', $scodata);
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}
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if (isset($element->prerequisites)) {
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$scodata->name = 'prerequisites';
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$scodata->value = $element->prerequisites;
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$dataid = $DB->insert_record('scorm_scoes_data', $scodata);
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}
|
||
|
|
if (isset($element->max_time_allowed)) {
|
||
|
|
$scodata->name = 'max_time_allowed';
|
||
|
|
$scodata->value = $element->max_time_allowed;
|
||
|
|
$dataid = $DB->insert_record('scorm_scoes_data', $scodata);
|
||
|
|
}
|
||
|
|
if (isset($element->time_limit_action)) {
|
||
|
|
$scodata->name = 'time_limit_action';
|
||
|
|
$scodata->value = $element->time_limit_action;
|
||
|
|
$dataid = $DB->insert_record('scorm_scoes_data', $scodata);
|
||
|
|
}
|
||
|
|
if (isset($element->mastery_score)) {
|
||
|
|
$scodata->name = 'mastery_score';
|
||
|
|
$scodata->value = $element->mastery_score;
|
||
|
|
$dataid = $DB->insert_record('scorm_scoes_data', $scodata);
|
||
|
|
}
|
||
|
|
if (isset($element->core_vendor)) {
|
||
|
|
$scodata->name = 'datafromlms';
|
||
|
|
$scodata->value = preg_replace('/<cr>/i', "\r\n", $element->core_vendor);
|
||
|
|
$dataid = $DB->insert_record('scorm_scoes_data', $scodata);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if ($launch == 0) {
|
||
|
|
$launch = $id;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!empty($oldscoes)) {
|
||
|
|
foreach ($oldscoes as $oldsco) {
|
||
|
|
$DB->delete_records('scorm_scoes', array('id' => $oldsco->id));
|
||
|
|
$DB->delete_records('scorm_scoes_track', array('scoid' => $oldsco->id));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Find first launchable object.
|
||
|
|
$sqlselect = 'scorm = ? AND '.$DB->sql_isnotempty('scorm_scoes', 'launch', false, true);
|
||
|
|
// We use get_records here as we need to pass a limit in the query that works cross db.
|
||
|
|
$scoes = $DB->get_records_select('scorm_scoes', $sqlselect, array($scorm->id), 'sortorder', 'id', 0, 1);
|
||
|
|
if (!empty($scoes)) {
|
||
|
|
$sco = reset($scoes); // We only care about the first record - the above query only returns one.
|
||
|
|
$scorm->launch = $sco->id;
|
||
|
|
} else {
|
||
|
|
$scorm->launch = $launch;
|
||
|
|
}
|
||
|
|
|
||
|
|
$scorm->version = 'AICC';
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Given a scormid creates an AICC Session record to allow HACP
|
||
|
|
*
|
||
|
|
* @param int $scormid - id from scorm table
|
||
|
|
* @return string hacpsession
|
||
|
|
*/
|
||
|
|
function scorm_aicc_get_hacp_session($scormid) {
|
||
|
|
global $USER, $DB, $SESSION;
|
||
|
|
$cfgscorm = get_config('scorm');
|
||
|
|
if (empty($cfgscorm->allowaicchacp)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
$now = time();
|
||
|
|
|
||
|
|
$hacpsession = $SESSION->scorm;
|
||
|
|
$hacpsession->scormid = $scormid;
|
||
|
|
$hacpsession->hacpsession = random_string(20);
|
||
|
|
$hacpsession->userid = $USER->id;
|
||
|
|
$hacpsession->timecreated = $now;
|
||
|
|
$hacpsession->timemodified = $now;
|
||
|
|
$DB->insert_record('scorm_aicc_session', $hacpsession);
|
||
|
|
|
||
|
|
return $hacpsession->hacpsession;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Check the hacp_session for whether it is valid.
|
||
|
|
*
|
||
|
|
* @param string $hacpsession The hacpsession value to check (optional). Normally leave this blank
|
||
|
|
* and this function will do required_param('sesskey', ...).
|
||
|
|
* @return mixed - false if invalid, otherwise returns record from scorm_aicc_session table.
|
||
|
|
*/
|
||
|
|
function scorm_aicc_confirm_hacp_session($hacpsession) {
|
||
|
|
global $DB;
|
||
|
|
$cfgscorm = get_config('scorm');
|
||
|
|
if (empty($cfgscorm->allowaicchacp)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
$time = time() - ($cfgscorm->aicchacptimeout * 60);
|
||
|
|
$sql = "hacpsession = ? AND timemodified > ?";
|
||
|
|
$hacpsession = $DB->get_record_select('scorm_aicc_session', $sql, array($hacpsession, $time));
|
||
|
|
if (!empty($hacpsession)) { // Update timemodified as this is still an active session - resets the timeout.
|
||
|
|
$hacpsession->timemodified = time();
|
||
|
|
$DB->update_record('scorm_aicc_session', $hacpsession);
|
||
|
|
}
|
||
|
|
return $hacpsession;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* generate a simple single activity AICC object
|
||
|
|
* structure to wrap around and externally linked
|
||
|
|
* AICC package URL
|
||
|
|
*
|
||
|
|
* @param object $scorm package record
|
||
|
|
*/
|
||
|
|
function scorm_aicc_generate_simple_sco($scorm) {
|
||
|
|
global $DB;
|
||
|
|
// Find the oldest one.
|
||
|
|
$scos = $DB->get_records('scorm_scoes', array('scorm' => $scorm->id), 'id');
|
||
|
|
if (!empty($scos)) {
|
||
|
|
$sco = array_shift($scos);
|
||
|
|
} else {
|
||
|
|
$sco = new stdClass();
|
||
|
|
}
|
||
|
|
// Get rid of old ones.
|
||
|
|
foreach ($scos as $oldsco) {
|
||
|
|
$DB->delete_records('scorm_scoes', array('id' => $oldsco->id));
|
||
|
|
$DB->delete_records('scorm_scoes_track', array('scoid' => $oldsco->id));
|
||
|
|
}
|
||
|
|
|
||
|
|
$sco->identifier = 'A1';
|
||
|
|
$sco->scorm = $scorm->id;
|
||
|
|
$sco->organization = '';
|
||
|
|
$sco->title = $scorm->name;
|
||
|
|
$sco->parent = '/';
|
||
|
|
// Add the HACP signal to the activity launcher.
|
||
|
|
if (preg_match('/\?/', $scorm->reference)) {
|
||
|
|
$sco->launch = $scorm->reference.'&CMI=HACP';
|
||
|
|
} else {
|
||
|
|
$sco->launch = $scorm->reference.'?CMI=HACP';
|
||
|
|
}
|
||
|
|
$sco->scormtype = 'sco';
|
||
|
|
if (isset($sco->id)) {
|
||
|
|
$DB->update_record('scorm_scoes', $sco);
|
||
|
|
$id = $sco->id;
|
||
|
|
} else {
|
||
|
|
$id = $DB->insert_record('scorm_scoes', $sco);
|
||
|
|
}
|
||
|
|
return $id;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Sets up $userdata array and default values for AICC package.
|
||
|
|
*
|
||
|
|
* @param stdClass $userdata an empty stdClass variable that should be set up with user values
|
||
|
|
* @param object $scorm package record
|
||
|
|
* @param string $scoid SCO Id
|
||
|
|
* @param string $attempt attempt number for the user
|
||
|
|
* @param string $mode scorm display mode type
|
||
|
|
* @return array The default values that should be used for AICC package
|
||
|
|
*/
|
||
|
|
function get_scorm_default (&$userdata, $scorm, $scoid, $attempt, $mode) {
|
||
|
|
global $USER;
|
||
|
|
$aiccuserid = get_config('scorm', 'aiccuserid');
|
||
|
|
if (!empty($aiccuserid)) {
|
||
|
|
$userdata->student_id = $USER->id;
|
||
|
|
} else {
|
||
|
|
$userdata->student_id = $USER->username;
|
||
|
|
}
|
||
|
|
$userdata->student_name = $USER->lastname .', '. $USER->firstname;
|
||
|
|
|
||
|
|
if ($usertrack = scorm_get_tracks($scoid, $USER->id, $attempt)) {
|
||
|
|
foreach ($usertrack as $key => $value) {
|
||
|
|
$userdata->$key = $value;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
$userdata->status = '';
|
||
|
|
$userdata->score_raw = '';
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($scodatas = scorm_get_sco($scoid, SCO_DATA)) {
|
||
|
|
foreach ($scodatas as $key => $value) {
|
||
|
|
$userdata->$key = $value;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
print_error('cannotfindsco', 'scorm');
|
||
|
|
}
|
||
|
|
if (!$sco = scorm_get_sco($scoid)) {
|
||
|
|
print_error('cannotfindsco', 'scorm');
|
||
|
|
}
|
||
|
|
|
||
|
|
$userdata->mode = 'normal';
|
||
|
|
if (!empty($mode)) {
|
||
|
|
$userdata->mode = $mode;
|
||
|
|
}
|
||
|
|
if ($userdata->mode == 'normal') {
|
||
|
|
$userdata->credit = 'credit';
|
||
|
|
} else {
|
||
|
|
$userdata->credit = 'no-credit';
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isset($userdata->status)) {
|
||
|
|
if ($userdata->status == '') {
|
||
|
|
$userdata->entry = 'ab-initio';
|
||
|
|
} else {
|
||
|
|
if (isset($userdata->{'cmi.core.exit'}) && ($userdata->{'cmi.core.exit'} == 'suspend')) {
|
||
|
|
$userdata->entry = 'resume';
|
||
|
|
} else {
|
||
|
|
$userdata->entry = '';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$def = array();
|
||
|
|
$def['cmi.core.student_id'] = $userdata->student_id;
|
||
|
|
$def['cmi.core.student_name'] = $userdata->student_name;
|
||
|
|
$def['cmi.core.credit'] = $userdata->credit;
|
||
|
|
$def['cmi.core.entry'] = $userdata->entry;
|
||
|
|
$def['cmi.launch_data'] = scorm_isset($userdata, 'datafromlms');
|
||
|
|
$def['cmi.core.lesson_mode'] = $userdata->mode;
|
||
|
|
$def['cmi.student_data.attempt_number'] = scorm_isset($userdata, 'cmi.student_data.attempt_number');
|
||
|
|
$def['cmi.student_data.mastery_score'] = scorm_isset($userdata, 'mastery_score');
|
||
|
|
$def['cmi.student_data.max_time_allowed'] = scorm_isset($userdata, 'max_time_allowed');
|
||
|
|
$def['cmi.student_data.time_limit_action'] = scorm_isset($userdata, 'time_limit_action');
|
||
|
|
$def['cmi.student_data.tries_during_lesson'] = scorm_isset($userdata, 'cmi.student_data.tries_during_lesson');
|
||
|
|
|
||
|
|
$def['cmi.core.lesson_location'] = scorm_isset($userdata, 'cmi.core.lesson_location');
|
||
|
|
$def['cmi.core.lesson_status'] = scorm_isset($userdata, 'cmi.core.lesson_status');
|
||
|
|
$def['cmi.core.exit'] = scorm_isset($userdata, 'cmi.core.exit');
|
||
|
|
$def['cmi.core.score.raw'] = scorm_isset($userdata, 'cmi.core.score.raw');
|
||
|
|
$def['cmi.core.score.max'] = scorm_isset($userdata, 'cmi.core.score.max');
|
||
|
|
$def['cmi.core.score.min'] = scorm_isset($userdata, 'cmi.core.score.min');
|
||
|
|
$def['cmi.core.total_time'] = scorm_isset($userdata, 'cmi.core.total_time', '00:00:00');
|
||
|
|
$def['cmi.suspend_data'] = scorm_isset($userdata, 'cmi.suspend_data');
|
||
|
|
$def['cmi.comments'] = scorm_isset($userdata, 'cmi.comments');
|
||
|
|
|
||
|
|
return $def;
|
||
|
|
}
|