opensourcepos/app/Views/sales/invoice.php

<?php
/**
 * @var string $sale_id_num
 * @var bool $print_after_sale
 * @var string $customer_info
 * @var string $company_info
 * @var string $invoice_number
 * @var string $transaction_date
 * @var float $total
 * @var bool $include_hsn
 * @var string $discount
 * @var array $cart
 * @var float $subtotal
 * @var array $taxes
 * @var array $payments
 * @var float $amount_change
 * @var string $barcode
 * @var int $sale_id
 * @var array $config
 */
?>

<?= view('partial/header') ?>

<?php
if (isset($error_message)) {
    echo '<div class="alert alert-dismissible alert-danger">' . $error_message . '</div>';
    exit;
}
?>

<?php if (!empty($customer_email)): ?>
    <script type="text/javascript">
        $(document).ready(function() {
            var send_email = function() {
                $.get('<?= site_url() . "sales/sendPdf/$sale_id_num" ?>',
                    function(response) {
                        $.notify({
                            message: response.message
                        }, {
                            type: response.success ? 'success' : 'danger'
                        });
                    }, 'json'
                );
            };

            $("#show_email_button").click(send_email);

            <?php if (!empty($email_receipt)): ?>
                send_email();
            <?php endif; ?>
        });
    </script>
<?php endif; ?>

<?= view('partial/print_receipt', ['print_after_sale' => $print_after_sale, 'selected_printer' => 'invoice_printer']) ?>

<div class="print_hide" id="control_buttons" style="text-align: right;">
    <a href="javascript:printdoc();">
        <div class="btn btn-info btn-sm" id="show_print_button"><?= '<span class="glyphicon glyphicon-print">&nbsp;</span>' . lang('Common.print') ?></div>
    </a>
    <?php
    /* This line will allow to print and go back to sales automatically.
     * echo anchor('sales', '<span class="glyphicon glyphicon-print">&nbsp;</span>' . lang('Common.print'), ['class' => 'btn btn-info btn-sm', 'id' => 'show_print_button', 'onclick' => 'window.print();'));
     */
?>
    <?php if (isset($customer_email) && !empty($customer_email)): ?>
        <a href="javascript:void(0);">
            <div class="btn btn-info btn-sm" id="show_email_button"><?= '<span class="glyphicon glyphicon-envelope">&nbsp;</span>' . lang('Sales.send_invoice') ?></div>
        </a>
    <?php endif; ?>
    <?= anchor("sales", '<span class="glyphicon glyphicon-shopping-cart">&nbsp;</span>' . lang('Sales.register'), ['class' => 'btn btn-info btn-sm', 'id' => 'show_sales_button']) ?>
    <?= anchor("sales/manage", '<span class="glyphicon glyphicon-list-alt">&nbsp;</span>' . lang('Sales.takings'), ['class' => 'btn btn-info btn-sm', 'id' => 'show_takings_button']) ?>
</div>

<div id="page-wrap">
    <div id="header"><?= lang('Sales.invoice') ?></div>
    <div id="block1">
        <div id="customer-title">
            <?php if (isset($customer)) { ?>
                <div id="customer"><?= nl2br(esc($customer_info)) ?></div>
            <?php } ?>
        </div>

        <div id="logo">
            <?php if ($config['company_logo'] != '') { ?>
                <img id="image" src="<?= base_url('uploads/' . esc($config['company_logo'], 'url')) ?>" alt="company_logo">
            <?php } ?>
            <div>&nbsp;</div>
            <?php if ($config['receipt_show_company_name']) { ?>
                <div id="company_name"><?= esc($config['company']) ?></div>
            <?php } ?>
        </div>
    </div>

    <div id="block2">
        <div id="company-title"><?= nl2br(esc($company_info)) ?></div>
        <table id="meta">
            <tr>
                <td class="meta-head"><?= lang('Sales.invoice_number') ?> </td>
                <td><?= esc($invoice_number) ?></td>
            </tr>
            <tr>
                <td class="meta-head"><?= lang('Common.date') ?></td>
                <td><?= esc($transaction_date) ?></td>
            </tr>
            <tr>
                <td class="meta-head"><?= lang('Sales.invoice_total') ?></td>
                <td><?= to_currency($total) ?></td>
            </tr>
        </table>
    </div>

    <table id="items">
        <tr>
            <th><?= lang('Sales.item_number') ?></th>
            <?php
        $invoice_columns = 6;
if ($include_hsn) {
    $invoice_columns += 1;
    ?>
                <th><?= lang('Sales.hsn') ?></th>
            <?php } ?>
            <th><?= lang('Sales.item_name') ?></th>
            <th><?= lang('Sales.quantity') ?></th>
            <th><?= lang('Sales.price') ?></th>
            <th><?= lang('Sales.discount') ?></th>
            <?php
    if ($discount > 0) {
        $invoice_columns += 1;
        ?>
                <th><?= lang('Sales.customer_discount') ?></th>
            <?php } ?>
            <th><?= lang('Sales.total') ?></th>
        </tr>

        <?php
        foreach ($cart as $line => $item) {
            if ($item['print_option'] == PRINT_YES) {
                ?>
                <tr class="item-row">
                    <td><?= esc($item['item_number']) ?></td>
                    <?php if ($include_hsn): ?>
                        <td style="text-align: center;"><?= esc($item['hsn_code']) ?></td>
                    <?php endif; ?>
                    <td class="item-name"><?= ($item['is_serialized'] || $item['allow_alt_description']) && !empty($item['description']) ? esc($item['description']) : esc($item['name'] . ' ' . $item['attribute_values']) ?></td>
                    <td style="text-align: center;"><?= to_quantity_decimals($item['quantity']) ?></td>
                    <td><?= to_currency($item['price']) ?></td>
                    <td style="text-align: center;"><?= ($item['discount_type'] == FIXED) ? to_currency($item['discount']) : to_decimals($item['discount']) . '%' ?></td>
                    <?php if ($discount > 0): ?>
                        <td style="text-align: center;"><?= to_currency($item['discounted_total'] / $item['quantity']) ?></td>
                    <?php endif; ?>
                    <td style="border-right: solid 1px; text-align: right;"><?= to_currency($item['discounted_total']) ?></td>
                </tr>
                <?php if ($item['is_serialized']) { ?>
                    <tr class="item-row">
                        <td class="item-description" colspan="<?= $invoice_columns - 1 ?>"></td>
                        <td style="text-align: center;"><?= esc($item['serialnumber'])    // TODO: `serialnumber` does not match variable naming conventions for this project.  Should be `serialNumber`?></td>
                    </tr>
        <?php
                }
            }
        }
?>

        <tr>
            <td class="blank" colspan="<?= $invoice_columns ?>" style="text-align: center;"><?= '&nbsp;' ?></td>
        </tr>

        <tr>
            <td colspan="<?= $invoice_columns - 3 ?>" class="blank-bottom"> </td>
            <td colspan="2" class="total-line"><?= lang('Sales.sub_total') ?></td>
            <td class="total-value" id="subtotal"><?= to_currency($subtotal) ?></td>
        </tr>

        <?php foreach ($taxes as $tax_group_index => $tax) { ?>
            <tr>
                <td colspan="<?= $invoice_columns - 3 ?>" class="blank"> </td>
                <td colspan="2" class="total-line"><?= (float)$tax['tax_rate'] . '% ' . esc($tax['tax_group']) ?></td>
                <td class="total-value" id="taxes"><?= to_currency_tax($tax['sale_tax_amount']) ?></td>
            </tr>
        <?php } ?>

        <tr>
            <td colspan="<?= $invoice_columns - 3 ?>" class="blank"> </td>
            <td colspan="2" class="total-line"><?= lang('Sales.total') ?></td>
            <td class="total-value" id="total"><?= to_currency($total) ?></td>
        </tr>

        <?php
$only_sale_check = false;
$show_giftcard_remainder = false;
foreach ($payments as $payment_id => $payment) {
    $only_sale_check |= $payment['payment_type'] == lang('Sales.check');
    $splitpayment = explode(':', $payment['payment_type']);    // TODO: $splitpayment does not meet variable naming standards for this project
    $show_giftcard_remainder |= $splitpayment[0] == lang('Sales.giftcard');
    ?>
            <tr>
                <td colspan="<?= $invoice_columns - 3 ?>" class="blank"> </td>
                <td colspan="2" class="total-line"><?= esc($splitpayment[0]) ?></td>
                <td class="total-value" id="paid"><?= to_currency($payment['payment_amount'] * -1) ?></td>
            </tr>
        <?php } ?>

        <?php if (isset($cur_giftcard_value) && $show_giftcard_remainder) { ?>
            <tr>
                <td colspan="<?= $invoice_columns - 3 ?>" class="blank"> </td>
                <td colspan="2" class="total-line"><?= lang('Sales.giftcard_balance') ?></td>
                <td class="total-value" id="giftcard"><?= to_currency($cur_giftcard_value) ?></td>
            </tr>
        <?php } ?>

        <?php if (!empty($payments)) { ?>
            <tr>
                <td colspan="<?= $invoice_columns - 3 ?>" class="blank"> </td>
                <td colspan="2" class="total-line"><?= lang($amount_change >= 0 ? ($only_sale_check ? 'Sales.check_balance' : 'Sales.change_due') : 'Sales.amount_due') ?></td>
                <td class="total-value" id="change"><?= to_currency($amount_change) ?></td>
            </tr>
        <?php } ?>

    </table>

    <div id="terms">
        <div id="sale_return_policy">
            <h5>
                <span><?= nl2br(esc($config['payment_message'])) ?></span>
                <span style="padding: 4%;"><?= empty($comments) ? esc($config['invoice_default_comments']) : lang('Sales.comments') . ': ' . esc($comments) ?></span>
            </h5>
            <div style="padding: 2%;"><?= nl2br(esc($config['return_policy'])) ?></div>
        </div>
        <div id="barcode">
            <?= $barcode ?><br>
            <?= $sale_id ?>
        </div>
    </div>
</div>

<script type="text/javascript">
    $(window).on("load", function() {
        // Install firefox addon in order to use this plugin
        if (window.jsPrintSetup) {
            <?php if (!$config['print_header']) { ?>
                // Set page header
                jsPrintSetup.setOption('headerStrLeft', '');
                jsPrintSetup.setOption('headerStrCenter', '');
                jsPrintSetup.setOption('headerStrRight', '');
            <?php } ?>

            <?php if (!$config['print_footer']) { ?>
                // Set empty page footer
                jsPrintSetup.setOption('footerStrLeft', '');
                jsPrintSetup.setOption('footerStrCenter', '');
                jsPrintSetup.setOption('footerStrRight', '');
            <?php } ?>
        }
    });
</script>

<?= view('partial/footer') ?>