receipt.php

<?php
// This file is part of Moodle - https://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 <https://www.gnu.org/licenses/>.

/**
 * Generate receipt after cashier has confirmed payment.
 *
 * @package     local_shopping_cart
 * @copyright   2021 Wunderbyte GmbH <info@wunderbyte.at>
 * @license     https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once(__DIR__ . '/../../config.php');
require_once($CFG->libdir . '/pdflib.php');

require_login();

// Include the main TCPDF library (search for installation path).
$id = required_param('id', PARAM_INT);
$userid = required_param('userid', PARAM_INT);

$context = context_system::instance();

$commaseparator = current_language() == 'de' ? ',' : '.';

ob_start();

// Create new PDF document.
$pdf = new TCPDF('p', 'pt', 'A4', true, 'UTF-8', false);
// Set some content to print.

$PAGE->set_context($context);
$PAGE->set_url('/receipt.php');

$PAGE->set_title('Receipt');
$PAGE->set_heading('Receipt');

$filename = get_config('local_shopping_cart' , 'receiptimage');
$cfghtml = get_config('local_shopping_cart', 'receipthtml');
$context = \context_system::instance();
$fs = get_file_storage();
$files = $fs->get_area_files($context->id, 'local_shopping_cart', 'local_shopping_cart_receiptimage');
foreach ($files as $file) {
    if ($file->get_filesize() > 0) {
        $filename = $file->get_filename();
        $imgurl = moodle_url::make_pluginfile_url($file->get_contextid(), $file->get_component(), $file->get_filearea(),
            $file->get_itemid(), $file->get_filepath(), $file->get_filename(), true);
    }
}

$items = local_shopping_cart\shopping_cart_history::return_data_from_ledger_via_identifier($id);
$timecreated = $items[array_key_first($items)]->timecreated;
$date = date("Y-m-d", $timecreated);
$userid = $items[array_key_first($items)]->userid;

global $DB;
$userdetails = $DB->get_record('user', ['id' => $userid]);

/*
 * TODO: We'll have to add the user profile picture in the future.
 * But it does not work with HTML. So we'll need a config setting
 * in shopping cart and have to add it using TCPDF.
 */
// phpcs:ignore Squiz.PHP.CommentedOutCode.Found
/*$picturefile = null;
if ($usercontext = context_user::instance($userid, IGNORE_MISSING)) {
    $fs = get_file_storage();
    $files = $fs->get_area_files($usercontext->id, 'user', 'icon');
    foreach ($files as $file) {
        $filenamewithoutextension = explode('.', $file->get_filename())[0];
        if ($filenamewithoutextension === 'f1') {
            $picturefile = $file;
            // We found it, so break the loop.
            break;
        }
    }
}
if (!empty($picturefile)) {
    // Retrieve the image contents and encode them as base64.
    $picturedata = $picturefile->get_content();
    $picturebase64 = base64_encode($picturedata);
    // Now load the HTML of the image into the profilepicture param.
    $userpic = '<img src="data:image/image;base64,' . $picturebase64 . '" />';
} else {
    $userpic = '';
}*/

$cfghtml = str_replace("[[date]]", $date, $cfghtml);
$cfghtml = str_replace("[[firstname]]", $userdetails->firstname, $cfghtml);
$cfghtml = str_replace("[[lastname]]", $userdetails->lastname, $cfghtml);
$cfghtml = str_replace("[[mail]]", $userdetails->email, $cfghtml);
$cfghtml = str_replace("[[id]]", $id, $cfghtml);

$prehtml = explode('[[items]]', $cfghtml);
$repeathtml = explode('[[/items]]', $prehtml[1]);
$posthtml = $repeathtml[1];

$pos = 1;
$sum = 0.0;
$itemhtml = '';
foreach ($items as $item) {
    $tmp = str_replace("[[price]]", number_format((float) $item->price, 2, $commaseparator, ''),
        $repeathtml[0]);
    $tmp = str_replace("[[name]]", $item->itemname, $tmp);
    $tmp = str_replace("[[pos]]", $pos, $tmp);

    // If it's a booking option, we add option-specific data.
    if ($item->area == "option" && class_exists('mod_booking\singleton_service')) {
        $optionid = $item->itemid;
        $optionsettings = \mod_booking\singleton_service::get_instance_of_booking_option_settings($optionid);
        $tmp = str_replace("[[location]]", $optionsettings->location ?? '', $tmp); // Add location.
        $tmp = str_replace("[[dayofweektime]]", $optionsettings->dayofweektime ?? '', $tmp); // E.g. "Mo, 10:00 - 12:00".
    } else {
        // It should still be replaced with an empty string in case it's no booking option.
        $tmp = str_replace("[[location]]", '', $tmp);
        $tmp = str_replace("[[dayofweektime]]", '', $tmp);
    }

    $sum += $item->price;
    $itemhtml .= $tmp;
    $pos++;
}

$sumstring = number_format((float) $sum, 2, $commaseparator, '');
$posthtml = str_replace("[[sum]]", $sumstring, $posthtml);
$html = '
<style>
    h1 {
        color: black;
        font-family: times;
        font-size: 24pt;
    }
    td {
        border-bottom: 1px solid #c3c3c3;
    }
    tr {
        border: 1px solid #c3c3c3;
    }
</style>
'. $prehtml[0] . $itemhtml . $posthtml;
// Print text using writeHTMLCell().

// Set document information.
$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor($userdetails->email);
$pdf->SetTitle('bookingreceipt_' . $id . '_' . $userid . '_' . $date);
$pdf->SetSubject('');
$pdf->SetKeywords('');

// Set header and footer fonts.
$pdf->setHeaderFont([PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN]);
$pdf->setFooterFont([PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA]);

// Set default monospaced font.
$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);

// Set auto page breaks.
$pdf->SetAutoPageBreak(false, PDF_MARGIN_BOTTOM);

// Set image scale factor.
$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);

// Set default font subsetting mode.
$pdf->setFontSubsetting(true);

$pdf->SetHeaderMargin(0);
$pdf->SetFooterMargin(0);
$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);

// Remove default footer.
$pdf->setPrintHeader(false);

$pdf->setPrintFooter(false);

$pdf->AddPage();

if (isset($imgurl)) {
    $pdf->Image($imgurl->out(false), 0, 0, $pdf->getPageWidth(), $pdf->getPageHeight(), "", "", "",
        true, "300", "", false, false, 0);
}
$pdf->writeHTMLCell(0, 0, '', '', $html, 0, 1, 0, true, '', true);

ob_end_clean();

// Close and output PDF document.
// This method has several options, check the source code documentation for more information.
$pdf->Output($userdetails->firstname . '_' . $userdetails->lastname . '_' . $date . '.pdf', 'I');