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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/>. /** * functions used by AICC packages. * * @package mod_scorm * @copyright 1999 onwards Roberto Pinna * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ function scorm_add_time($a, $b) { $aes = explode(':', $a); $bes = explode(':', $b); $aseconds = explode('.', $aes[2]); $bseconds = explode('.', $bes[2]); $change = 0; $acents = 0; // Cents. if (count($aseconds) > 1) { $acents = $aseconds[1]; } $bcents = 0; if (count($bseconds) > 1) { $bcents = $bseconds[1]; } $cents = $acents + $bcents; $change = floor($cents / 100); $cents = $cents - ($change * 100); if (floor($cents) < 10) { $cents = '0'. $cents; } $secs = $aseconds[0] + $bseconds[0] + $change; // Seconds. $change = floor($secs / 60); $secs = $secs - ($change * 60); if (floor($secs) < 10) { $secs = '0'. $secs; } $mins = $aes[1] + $bes[1] + $change; // Minutes. $change = floor($mins / 60); $mins = $mins - ($change * 60); if ($mins < 10) { $mins = '0' . $mins; } $hours = $aes[0] + $bes[0] + $change; // Hours. if ($hours < 10) { $hours = '0' . $hours; } if ($cents != '0') { return $hours . ":" . $mins . ":" . $secs . '.' . $cents; } else { return $hours . ":" . $mins . ":" . $secs; } } /** * Take the header row of an AICC definition file * and returns sequence of columns and a pointer to * the sco identifier column. * * @param string $row AICC header row * @param string $mastername AICC sco identifier column * @return mixed */ function scorm_get_aicc_columns($row, $mastername='system_id') { $tok = strtok(strtolower($row), "\",\n\r"); $result = new stdClass(); $result->columns = array(); $result->mastercol = 0; $i = 0; while ($tok) { if ($tok != '') { $result->columns[] = $tok; if ($tok == $mastername) { $result->mastercol = $i; } $i++; } $tok = strtok("\",\n\r"); } return $result; } /** * Given a colums array return a string containing the regular * expression to match the columns in a text row. * * @param array $column The header columns * @param string $remodule The regular expression module for a single column * @return string */ function scorm_forge_cols_regexp($columns, $remodule='(".*")?,') { $regexp = '/^'; foreach ($columns as $column) { $regexp .= $remodule; } $regexp = substr($regexp, 0, -1) . '/'; return $regexp; } /** * Sets up AICC packages * Called whenever package changes * @param object $scorm instance - fields are updated and changes saved into database * @return bool */ function scorm_parse_aicc(&$scorm) { global $DB; if ($scorm->scormtype == SCORM_TYPE_AICCURL) { return scorm_aicc_generate_simple_sco($scorm); } if (!isset($scorm->cmid)) { $cm = get_coursemodule_from_instance('scorm', $scorm->id); $scorm->cmid = $cm->id; } $context = context_module::instance($scorm->cmid); $fs = get_file_storage(); $files = $fs->get_area_files($context->id, 'mod_scorm', 'content', 0, 'sortorder, itemid, filepath, filename', false); $version = 'AICC'; $ids = array(); $courses = array(); $extaiccfiles = array('crs', 'des', 'au', 'cst', 'ort', 'pre', 'cmp'); foreach ($files as $file) { $filename = $file->get_filename(); $ext = substr($filename, strrpos($filename, '.')); $extension = strtolower(substr($ext, 1)); if (in_array($extension, $extaiccfiles)) { $id = strtolower(basename($filename, $ext)); if (!isset($ids[$id])) { $ids[$id] = new stdClass(); } $ids[$id]->$extension = $file; } } foreach ($ids as $courseid => $id) { if (!isset($courses[$courseid])) { $courses[$courseid] = new stdClass(); } if (isset($id->crs)) { $contents = $id->crs->get_content(); $rows = explode("\r\n", $contents); if (is_array($rows)) { foreach ($rows as $row) { if (preg_match("/^(.+)=(.+)$/", $row, $matches)) { switch (strtolower(trim($matches[1]))) { case 'course_id': $courses[$courseid]->id = trim($matches[2]); break; case 'course_title': $courses[$courseid]->title = trim($matches[2]); break; case 'version': $courses[$courseid]->version = 'AICC_'.trim($matches[2]); break; } } } } } if (isset($id->des)) { $contents = $id->des->get_content(); $rows = explode("\r\n", $contents); $columns = scorm_get_aicc_columns($rows[0]); $regexp = scorm_forge_cols_regexp($columns->columns); for ($i = 1; $i < count($rows); $i++) { if (preg_match($regexp, $rows[$i], $matches)) { for ($j = 0; $j < count($columns->columns); $j++) { $column = $columns->columns[$j]; if (!isset($courses[$courseid]->elements[substr(trim($matches[$columns->mastercol + 1]), 1 , -1)])) { $courses[$courseid]->elements[substr(trim($matches[$columns->mastercol + 1]), 1 , -1)] = new stdClass(); } $courses[$courseid]->elements[substr(trim($matches[$columns->mastercol + 1]), 1 , -1)]->$column = substr(trim($matches[$j + 1]), 1, -1); } } } } if (isset($id->au)) { $contents = $id->au->get_content(); $rows = explode("\r\n", $contents); $columns = scorm_get_aicc_columns($rows[0]); $regexp = scorm_forge_cols_regexp($columns->columns); for ($i = 1; $i < count($rows); $i++) { if (preg_match($regexp, $rows[$i], $matches)) { for ($j = 0; $j < count($columns->columns); $j++) { $column = $columns->columns[$j]; $courses[$courseid]->elements[substr(trim($matches[$columns->mastercol + 1]), 1, -1)]->$column = substr(trim($matches[$j + 1]), 1, -1); } } } } if (isset($id->cst)) { $contents = $id->cst->get_content(); $rows = explode("\r\n", $contents); $columns = scorm_get_aicc_columns($rows[0], 'block'); $regexp = scorm_forge_cols_regexp($columns->columns, '(.+)?,'); for ($i = 1; $i < count($rows); $i++) { if (preg_match($regexp, $rows[$i], $matches)) { for ($j = 0; $j < count($columns->columns); $j++) { if ($j != $columns->mastercol) { $element = substr(trim($matches[$j + 1]), 1 , -1); if (!empty($element)) { $courses[$courseid]->elements[$element]->parent = substr(trim($matches[$columns->mastercol + 1]), 1, -1); } } } } } } if (isset($id->ort)) { $contents = $id->ort->get_content(); $rows = explode("\r\n", $contents); $columns = scorm_get_aicc_columns($rows[0], 'course_element'); $regexp = scorm_forge_cols_regexp($columns->columns, '(.+)?,'); for ($i = 1; $i < count($rows); $i++) { if (preg_match($regexp, $rows[$i], $matches)) { for ($j = 0; $j < count($matches) - 1; $j++) { if ($j != $columns->mastercol) { $courses[$courseid]->elements[substr(trim($matches[$j + 1]), 1, -1)]->parent = substr(trim($matches[$columns->mastercol + 1]), 1, -1); } } } } } if (isset($id->pre)) { $contents = $id->pre->get_content(); $rows = explode("\r\n", $contents); $columns = scorm_get_aicc_columns($rows[0], 'structure_element'); $regexp = scorm_forge_cols_regexp($columns->columns, '(.+),'); for ($i = 1; $i < count($rows); $i++) { if (preg_match($regexp, $rows[$i], $matches)) { $elementid = trim($matches[$columns->mastercol + 1]); $elementid = trim(trim($elementid, '"'), "'"); // Remove any quotes. $prereq = trim($matches[2 - $columns->mastercol]); $prereq = trim(trim($prereq, '"'), "'"); // Remove any quotes. $courses[$courseid]->elements[$elementid]->prerequisites = $prereq; } } } if (isset($id->cmp)) { $contents = $id->cmp->get_content(); $rows = explode("\r\n", $contents); } } $oldscoes = $DB->get_records('scorm_scoes', array('scorm' => $scorm->id)); $sortorder = 0; $launch = 0; if (isset($courses)) { foreach ($courses as $course) { $sortorder++; $sco = new stdClass(); $sco->identifier = $course->id; $sco->scorm = $scorm->id; $sco->organization = ''; $sco->title = $course->title; $sco->parent = '/'; $sco->launch = ''; $sco->scormtype = ''; $sco->sortorder = $sortorder; if ($ss = $DB->get_record('scorm_scoes', array('scorm' => $scorm->id, 'identifier' => $sco->identifier))) { $id = $ss->id; $sco->id = $id; $DB->update_record('scorm_scoes', $sco); unset($oldscoes[$id]); } else { $id = $DB->insert_record('scorm_scoes', $sco); } if ($launch == 0) { $launch = $id; } if (isset($course->elements)) { foreach ($course->elements as $element) { unset($sco); $sco = new stdClass(); $sco->identifier = $element->system_id; $sco->scorm = $scorm->id; $sco->organization = $course->id; $sco->title = $element->title; if (!isset($element->parent)) { $sco->parent = '/'; } else if (strtolower($element->parent) == 'root') { $sco->parent = $course->id; } else { $sco->parent = $element->parent; } $sco->launch = ''; $sco->scormtype = ''; $sco->previous = 0; $sco->next = 0; $id = null; // Is it an Assignable Unit (AU)? if (isset($element->file_name)) { $sco->launch = $element->file_name; $sco->scormtype = 'sco'; } if ($oldscoid = scorm_array_search('identifier', $sco->identifier, $oldscoes)) { $sco->id = $oldscoid; $DB->update_record('scorm_scoes', $sco); $id = $oldscoid; $DB->delete_records('scorm_scoes_data', array('scoid' => $oldscoid)); unset($oldscoes[$oldscoid]); } else { $id = $DB->insert_record('scorm_scoes', $sco); } if (!empty($id)) { $scodata = new stdClass(); $scodata->scoid = $id; if (isset($element->web_launch)) { $scodata->name = 'parameters'; $scodata->value = $element->web_launch; $dataid = $DB->insert_record('scorm_scoes_data', $scodata); } if (isset($element->prerequisites)) { $scodata->name = 'prerequisites'; $scodata->value = $element->prerequisites; $dataid = $DB->insert_record('scorm_scoes_data', $scodata); } if (isset($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; }