KumiSystems/moodle-mod-customcert
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moodle-mod-customcert/locallib.php

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Moved internal functions to locallib.php
2015-03-11 07:24:51 +00:00
<?php
// This file is part of the customcert module for 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/>.
/**
* Customcert module internal API.
*
* @package mod_customcert
* @copyright 2013 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
defined('MOODLE_INTERNAL') || die();
/**
* @var string the print protection variable
*/
define('PROTECTION_PRINT', 'print');
/**
* @var string the modify protection variable
*/
define('PROTECTION_MODIFY', 'modify');
/**
* @var string the copy protection variable
*/
define('PROTECTION_COPY', 'copy');
/**
* @var int the number of issues that will be displayed on each page in the report
* If you want to display all customcerts on a page set this to 0.
*/
define('CUSTOMCERT_PER_PAGE', 20);
/**
* @var int the max number of issues to display
*/
define('CUSTOMCERT_MAX_PER_PAGE', 300);
/**
* Handles setting the protection field for the customcert
*
* @param stdClass $data
* @return string the value to insert into the protection field
*/
function customcert_set_protection($data) {
$protection = array();
if (!empty($data->protection_print)) {
$protection[] = PROTECTION_PRINT;
}
if (!empty($data->protection_modify)) {
$protection[] = PROTECTION_MODIFY;
}
if (!empty($data->protection_copy)) {
$protection[] = PROTECTION_COPY;
}
// Return the protection string.
return implode(', ', $protection);
}
/**
* Handles uploading an image for the customcert module.
*
* @param int $draftitemid the draft area containing the files
* @param int $contextid the context we are storing this image in
*/
function customcert_upload_imagefiles($draftitemid, $contextid) {
// Save the file if it exists that is currently in the draft area.
file_save_draft_area_files($draftitemid, $contextid, 'mod_customcert', 'image', 0);
}
/**
* Return the list of possible elements to add.
*
* @return array the list of images that can be used.
*/
function customcert_get_elements() {
global $CFG;
// Array to store the element types.
$options = array();
// Check that the directory exists.
$elementdir = "$CFG->dirroot/mod/customcert/element";
if (file_exists($elementdir)) {
// Get directory contents.
$elementfolders = new DirectoryIterator($elementdir);
// Loop through the elements folder.
foreach ($elementfolders as $elementfolder) {
// If it is not a directory or it is '.' or '..', skip it.
if (!$elementfolder->isDir() || $elementfolder->isDot()) {
continue;
}
// Check that the standard class file exists, if not we do
// not want to display it as an option as it will not work.
$foldername = $elementfolder->getFilename();
$classfile = "$elementdir/$foldername/lib.php";
if (file_exists($classfile)) {
// Need to require this file in case if we choose to add this element.
require_once($classfile);
$component = "customcertelement_{$foldername}";
$options[$foldername] = get_string('pluginname', $component);
}
}
}
customcert_perform_asort($options);
return $options;
}
/**
* Return the list of possible fonts to use.
*/
function customcert_get_fonts() {
global $CFG;
// Array to store the available fonts.
$options = array();
// Location of fonts in Moodle.
$fontdir = "$CFG->dirroot/lib/tcpdf/fonts";
// Check that the directory exists.
if (file_exists($fontdir)) {
// Get directory contents.
$fonts = new DirectoryIterator($fontdir);
// Loop through the font folder.
foreach ($fonts as $font) {
// If it is not a file, or either '.' or '..', or
// the extension is not php, or we can not open file,
// skip it.
if (!$font->isFile() || $font->isDot() || ($font->getExtension() != 'php')) {
continue;
}
// Set the name of the font to null, the include next should then set this
// value, if it is not set then the file does not include the necessary data.
$name = null;
// Some files include a display name, the include next should then set this
// value if it is present, if not then $name is used to create the display name.
$displayname = null;
// Some of the TCPDF files include files that are not present, so we have to
// suppress warnings, this is the TCPDF libraries fault, grrr.
@include("$fontdir/$font");
// If no $name variable in file, skip it.
if (is_null($name)) {
continue;
}
// Remove the extension of the ".php" file that contains the font information.
$filename = basename($font, ".php");
// Check if there is no display name to use.
if (is_null($displayname)) {
// Format the font name, so "FontName-Style" becomes "Font Name - Style".
$displayname = preg_replace("/([a-z])([A-Z])/", "$1 $2", $name);
$displayname = preg_replace("/([a-zA-Z])-([a-zA-Z])/", "$1 - $2", $displayname);
}
$options[$filename] = $displayname;
}
ksort($options);
}
return $options;
}
/**
* Return the list of possible font sizes to use.
*/
function customcert_get_font_sizes() {
// Array to store the sizes.
$sizes = array();
for ($i = 1; $i <= 60; $i++) {
$sizes[$i] = $i;
}
return $sizes;
}
/**
* Handles saving page data.
*
* @param stdClass $data the customcert data
*/
function customcert_save_page_data($data) {
global $DB;
// Set the time to a variable.
$time = time();
// Get the existing pages and save the page data.
if ($pages = $DB->get_records('customcert_pages', array('customcertid' => $data->id))) {
// Loop through existing pages.
foreach ($pages as $page) {
// Get the name of the fields we want from the form.
$width = 'pagewidth_' . $page->id;
$height = 'pageheight_' . $page->id;
// Create the page data to update the DB with.
$p = new stdClass();
$p->id = $page->id;
$p->width = $data->$width;
$p->height = $data->$height;
$p->timemodified = $time;
// Update the page.
$DB->update_record('customcert_pages', $p);
}
}
}
/**
* Returns an instance of the element class.
*
* @param stdClass $element the element
* @return stdClass|bool returns the instance of the element class, or false if element
* class does not exists.
*/
function customcert_get_element_instance($element) {
global $CFG;
$classfile = "$CFG->dirroot/mod/customcert/element/{$element->element}/lib.php";
// Ensure this necessary file exists.
if (file_exists($classfile)) {
require_once($classfile);
$classname = "customcert_element_{$element->element}";
return new $classname($element);
}
return false;
}
/**
* Handles adding another page to the customcert.
*
* @param stdClass $data the form data
*/
function customcert_add_page($data) {
global $DB;
// Set the page number to 1 to begin with.
$pagenumber = 1;
// Get the max page number.
$sql = "SELECT MAX(pagenumber) as maxpage
FROM {customcert_pages} cp
WHERE cp.customcertid = :customcertid";
if ($maxpage = $DB->get_record_sql($sql, array('customcertid' => $data->id))) {
$pagenumber = $maxpage->maxpage + 1;
}
// Store time in a variable.
$time = time();
// New page creation.
$page = new stdClass();
$page->customcertid = $data->id;
$page->width = '210';
$page->height = '297';
$page->pagenumber = $pagenumber;
$page->timecreated = $time;
$page->timemodified = $time;
// Insert the page.
$DB->insert_record('customcert_pages', $page);
}
/**
* Handles deleting a page from the customcert.
*
* @param int $pageid the customcert page
*/
function customcert_delete_page($pageid) {
global $DB;
// Get the page.
$page = $DB->get_record('customcert_pages', array('id' => $pageid), '*', MUST_EXIST);
// Delete this page.
$DB->delete_records('customcert_pages', array('id' => $page->id));
// The element may have some extra tasks it needs to complete to completely delete itself.
if ($elements = $DB->get_records('customcert_elements', array('pageid' => $page->id))) {
foreach ($elements as $element) {
// Get an instance of the element class.
if ($e = customcert_get_element_instance($element)) {
$e->delete_element();
}
}
}
// Now we want to decrease the page number values of
// the pages that are greater than the page we deleted.
$sql = "UPDATE {customcert_pages}
SET pagenumber = pagenumber - 1
WHERE customcertid = :customcertid
AND pagenumber > :pagenumber";
$DB->execute($sql, array('customcertid' => $page->customcertid,
'pagenumber' => $page->pagenumber));
}
/**
* Returns a list of all the templates.
*
* @return bool returns true if success, false otherwise
*/
function customcert_get_templates() {
global $DB;
return $DB->get_records_menu('customcert_template', array(), 'name ASC', 'id, name');
}
/**
* Get the time the user has spent in the course.
*
* @param int $courseid
* @return int the total time spent in seconds
*/
function customcert_get_course_time($courseid) {
global $CFG, $USER;
set_time_limit(0);
$totaltime = 0;
$sql = "l.course = :courseid AND l.userid = :userid";
if ($logs = get_logs($sql, array('courseid' => $courseid, 'userid' => $USER->id), 'l.time ASC', '', '', $totalcount)) {
foreach ($logs as $log) {
if (!isset($login)) {
// For the first time $login is not set so the first log is also the first login.
$login = $log->time;
$lasthit = $log->time;
$totaltime = 0;
}
$delay = $log->time - $lasthit;
if ($delay > ($CFG->sessiontimeout * 60)) {
// The difference between the last log and the current log is more than
// the timeout register session value meaning we have found a session.
$login = $log->time;
} else {
$totaltime += $delay;
}
// Now the actual log became the previous log for the next cycle.
$lasthit = $log->time;
}
return $totaltime;
}
return 0;
}
/**
* Returns a list of issued customcerts.
*
* @param int $customcertid
* @param bool $groupmode are we in group mode
* @param stdClass $cm the course module
* @param int $page offset
* @param int $perpage total per page
* @return stdClass the users
*/
function customcert_get_issues($customcertid, $groupmode, $cm, $page, $perpage) {
global $DB;
// Get the conditional SQL.
list($conditionssql, $conditionsparams) = customcert_get_conditional_issues_sql($cm, $groupmode);
// Add the conditional SQL and the customcertid to form all used parameters.
$allparams = $conditionsparams + array('customcertid' => $customcertid);
// Return the issues.
return $DB->get_records_sql("SELECT u.*, ci.code, ci.timecreated
FROM {user} u
INNER JOIN {customcert_issues} ci
ON u.id = ci.userid
WHERE u.deleted = 0
AND ci.customcertid = :customcertid
$conditionssql
ORDER BY " . $DB->sql_fullname(),
$allparams,
$page * $perpage,
$perpage);
}
/**
* Returns the total number of issues for a given customcert.
*
* @param int $customcertid
* @param stdClass $cm the course module
* @param bool $groupmode the group mode
* @return int the number of issues
*/
function customcert_get_number_of_issues($customcertid, $cm, $groupmode) {
global $DB;
// Get the conditional SQL.
list($conditionssql, $conditionsparams) = customcert_get_conditional_issues_sql($cm, $groupmode);
// Add the conditional SQL and the customcertid to form all used parameters.
$allparams = $conditionsparams + array('customcertid' => $customcertid);
// Return the number of issues.
return $DB->count_records_sql("SELECT COUNT(u.id) as count
FROM {user} u
INNER JOIN {customcert_issues} ci
ON u.id = ci.userid
WHERE u.deleted = 0
AND ci.customcertid = :customcertid
$conditionssql",
$allparams);
}
/**
* Returns an array of the conditional variables to use in the get_issues SQL query.
*
* @param stdClass $cm the course module
* @param bool $groupmode are we in group mode ?
* @return array the conditional variables
*/
function customcert_get_conditional_issues_sql($cm, $groupmode) {
global $CFG, $DB;
// Get all users that can manage this customcert to exclude them from the report.
$context = context_module::instance($cm->id);
$conditionssql = '';
$conditionsparams = array();
if ($certmanagers = array_keys(get_users_by_capability($context, 'mod/customcert:manage', 'u.id'))) {
list($sql, $params) = $DB->get_in_or_equal($certmanagers, SQL_PARAMS_NAMED, 'cert');
$conditionssql .= "AND NOT u.id $sql \n";
$conditionsparams += $params;
}
$restricttogroup = false;
if ($groupmode) {
$currentgroup = groups_get_activity_group($cm);
if ($currentgroup) {
$restricttogroup = true;
$groupusers = array_keys(groups_get_members($currentgroup, 'u.*'));
if (empty($groupusers)) {
return array();
}
}
}
$restricttogrouping = false;
// If groupmembersonly used, remove users who are not in any group.
if (!empty($CFG->enablegroupings) and $cm->groupmembersonly) {
if ($groupingusers = groups_get_grouping_members($cm->groupingid, 'u.id', 'u.id')) {
$restricttogrouping = true;
} else {
return array();
}
}
if ($restricttogroup || $restricttogrouping) {
if ($restricttogroup) {
$allowedusers = $groupusers;
} else if ($restricttogroup && $restricttogrouping) {
$allowedusers = array_intersect($groupusers, $groupingusers);
} else {
$allowedusers = $groupingusers;
}
list($sql, $params) = $DB->get_in_or_equal($allowedusers, SQL_PARAMS_NAMED, 'grp');
$conditionssql .= "AND u.id $sql \n";
$conditionsparams += $params;
}
return array($conditionssql, $conditionsparams);
}
/**
* Generates a 10-digit code of random letters and numbers.
*
* @return string
*/
function customcert_generate_code() {
global $DB;
$uniquecodefound = false;
$code = random_string(10);
while (!$uniquecodefound) {
if (!$DB->record_exists('customcert_issues', array('code' => $code))) {
$uniquecodefound = true;
} else {
$code = random_string(10);
}
}
return $code;
}
/**
* Generate the grid PDF to show the layout of the PDF.
*
* @param int $pageid the customcert page
*/
function customcert_generate_grid_pdf($pageid) {
global $CFG, $DB;
require_once($CFG->libdir . '/pdflib.php');
// Get the page.
$page = $DB->get_record('customcert_pages', array('id' => $pageid), '*', MUST_EXIST);
// Set the PDF name.
$pdfname = get_string('gridpdfname', 'customcert', $page->id);
// Create the pdf object.
$pdf = new pdf();
$pdf->setPrintHeader(false);
$pdf->setPrintFooter(false);
$pdf->SetTitle($pdfname);
$pdf->SetMargins(0, 0);
$pdf->SetAutoPageBreak(true, 0);
// Add the page to the PDF.
if ($page->width > $page->height) {
$orientation = 'L';
} else {
$orientation = 'P';
}
$pdf->AddPage($orientation, array($page->width, $page->height));
// The cell width.
$cellwidth = 10;
$cellheight = 10;
// The increments we want to go up in.
$inc = 20;
$decpos = 4;
// Draw first lines before we increment from here.
$pdf->Line(($inc / 2) + 2, 0, ($inc / 2) + 2, $page->height);
$pdf->Line(0, ($inc / 2), $page->width, ($inc / 2));
// Now we want to start drawing the lines to make the grid.
// Draw the horizontal lines.
for ($h = $inc; $h <= $page->height; $h += $inc) {
// Dirty hack cause the printer keeps cutting off characters
// near the end of the page for some BS reason.
if (strlen($h) <= 2) {
$lmargin = 5;
} else {
$lmargin = 4;
}
// Write the distance we are at.
$pdf->writeHTMLCell($cellwidth, $cellheight, $lmargin, $h - $decpos, $h);
// Get the location we are going to draw the line and then draw it.
$hline = $h + ($inc / 2);
$pdf->Line(0, $hline, $page->width, $hline);
}
// Draw the vertical lines.
for ($w = $inc; $w <= $page->width; $w += $inc) {
// Write the distance we are at.
$pdf->writeHTMLCell($cellwidth, $cellheight, $w - $decpos, 3, $w);
// Get the location we are going to draw the line and then draw it.
$wline = $w + ($inc / 2);
$pdf->Line($wline, 0, $wline, $page->height);
}
$pdf->Output($pdfname . '.pdf', 'D');
exit();
}
/**
* Generate the PDF for the specified customcert and user.
*
* @param stdClass $customcert
* @param bool $preview true if it is a preview, false otherwise
*/
function customcert_generate_pdf($customcert, $preview = false) {
global $CFG, $DB;
require_once($CFG->libdir . '/pdflib.php');
// Get the pages for the customcert, there should always be at least one page for each customcert.
if ($pages = $DB->get_records('customcert_pages', array('customcertid' => $customcert->id), 'pagenumber ASC')) {
// Create the pdf object.
$pdf = new pdf();
if (!empty($customcert->protection)) {
$protection = explode(', ', $customcert->protection);
$pdf->SetProtection($protection);
}
$pdf->setPrintHeader(false);
$pdf->setPrintFooter(false);
$pdf->SetTitle($customcert->name);
$pdf->SetMargins(0, 0);
$pdf->SetAutoPageBreak(true, 0);
// Remove full-stop at the end, if it exists, to avoid "..pdf" being created and being filtered by clean_filename.
$filename = rtrim($customcert->name, '.');
$filename = clean_filename($filename . '.pdf');
// Loop through the pages and display their content.
foreach ($pages as $page) {
// Add the page to the PDF.
if ($page->width > $page->height) {
$orientation = 'L';
} else {
$orientation = 'P';
}
$pdf->AddPage($orientation, array($page->width, $page->height));
// Get the elements for the page.
if ($elements = $DB->get_records('customcert_elements', array('pageid' => $page->id), 'sequence ASC')) {
// Loop through and display.
foreach ($elements as $element) {
// Get an instance of the element class.
if ($e = customcert_get_element_instance($element)) {
$e->render($pdf, $preview);
}
}
}
}
$pdf->Output($filename, 'D');
}
}
/**
* Generate the report.
*
* @param stdClass $customcert
* @param stdClass $users the list of users who have had a customcert issued
* @param string $type
*/
function customcert_generate_report_file($customcert, $users, $type) {
global $CFG, $COURSE;
if ($type == 'ods') {
require_once($CFG->libdir . '/odslib.class.php');
$workbook = new MoodleODSWorkbook('-');
} else if ($type == 'xls') {
require_once($CFG->libdir . '/excellib.class.php');
$workbook = new MoodleExcelWorkbook('-');
}
$filename = clean_filename($COURSE->shortname . ' ' . rtrim($customcert->name, '.') . '.' . $type);
// Send HTTP headers.
$workbook->send($filename);
// Creating the first worksheet.
$myxls = $workbook->add_worksheet(get_string('report', 'customcert'));
// Print names of all the fields.
$myxls->write_string(0, 0, get_string('lastname'));
$myxls->write_string(0, 1, get_string('firstname'));
$myxls->write_string(0, 2, get_string('idnumber'));
$myxls->write_string(0, 3, get_string('group'));
$myxls->write_string(0, 4, get_string('receiveddate', 'customcert'));
$myxls->write_string(0, 5, get_string('code', 'customcert'));
// Generate the data for the body of the spreadsheet.
$row = 1;
if ($users) {
foreach ($users as $user) {
$myxls->write_string($row, 0, $user->lastname);
$myxls->write_string($row, 1, $user->firstname);
$studentid = (!empty($user->idnumber)) ? $user->idnumber : ' ';
$myxls->write_string($row, 2, $studentid);
$ug2 = '';
if ($usergrps = groups_get_all_groups($COURSE->id, $user->id)) {
foreach ($usergrps as $ug) {
$ug2 = $ug2 . $ug->name;
}
}
$myxls->write_string($row, 3, $ug2);
$myxls->write_string($row, 4, userdate($user->timecreated));
$myxls->write_string($row, 5, $user->code);
$row++;
}
}
// Close the workbook.
$workbook->close();
}
/**
* Perform asort on a given array.
*
* @param array $fields
*/
function customcert_perform_asort(&$fields) {
if (class_exists('core_collator')) {
core_collator::asort($fields);
} else {
collatorlib::asort($fields);
}
}
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