From e4db9fae8255952c45e4650a8ab793c4a218dfc4 Mon Sep 17 00:00:00 2001
From: DanielS <daniel.schumacher@caspos.de>
Date: Thu, 12 Nov 2026 00:14:14 +0100
Subject: [PATCH] Add occupancyplan: Belegungsplan (rooms x days) with
 click-to-reserve

New back-office page "Hotel Reservation System > Belegungsplan":
- rooms grouped by room type as rows, 14-62 days as columns, weekends
  and today highlighted, sticky room column, daily occupancy footer
- bookings as bars (booked / checked in / checked out / no-show) with
  guest name, guests, tooltip with dates, order reference and price;
  click opens the order; stays outside the view are cut
- booking source badge from orders.id_source (W website, T phone,
  B Booking.com, E Expedia ...; portals highlighted), so channel-manager
  bookings show up with their source
- blocked periods (htl_room_disable_dates) hatched with reason
- CASPOS badge: nights already posted by casposbridge, "!" on failures
- reserve: click a free cell (first night) and a later one (last night)
  in the same row -> action bar -> "Book Now" opens with dates, hotel
  and room type prefilled; keyboard: Enter/Space, Escape
- docker/test-occupancyplan.php: 15 checks with throw-away bookings,
  optional HTML preview

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 docker/test-occupancyplan.php                 | 109 ++++++
 .../classes/OccupancyPlanRenderer.php         | 314 ++++++++++++++++++
 modules/occupancyplan/classes/index.php       |  32 ++
 .../admin/AdminOccupancyPlanController.php    |  79 +++++
 .../occupancyplan/controllers/admin/index.php |  32 ++
 modules/occupancyplan/controllers/index.php   |  32 ++
 modules/occupancyplan/index.php               |  32 ++
 modules/occupancyplan/logo.png                | Bin 0 -> 5839 bytes
 modules/occupancyplan/occupancyplan.php       |  66 ++++
 modules/occupancyplan/views/index.php         |  32 ++
 modules/occupancyplan/views/js/index.php      |  32 ++
 .../occupancyplan/views/js/occupancyplan.js   | 111 +++++++
 12 files changed, 871 insertions(+)
 create mode 100644 docker/test-occupancyplan.php
 create mode 100644 modules/occupancyplan/classes/OccupancyPlanRenderer.php
 create mode 100644 modules/occupancyplan/classes/index.php
 create mode 100644 modules/occupancyplan/controllers/admin/AdminOccupancyPlanController.php
 create mode 100644 modules/occupancyplan/controllers/admin/index.php
 create mode 100644 modules/occupancyplan/controllers/index.php
 create mode 100644 modules/occupancyplan/index.php
 create mode 100644 modules/occupancyplan/logo.png
 create mode 100644 modules/occupancyplan/occupancyplan.php
 create mode 100644 modules/occupancyplan/views/index.php
 create mode 100644 modules/occupancyplan/views/js/index.php
 create mode 100644 modules/occupancyplan/views/js/occupancyplan.js

diff --git a/docker/test-occupancyplan.php b/docker/test-occupancyplan.php
new file mode 100644
index 000000000..4d9e1ca0c
--- /dev/null
+++ b/docker/test-occupancyplan.php
@@ -0,0 +1,109 @@
+<?php
+/**
+ * Checks modules/occupancyplan with throw-away bookings and writes an HTML preview.
+ *   docker compose ... exec -u www-data app php docker/test-occupancyplan.php [preview-file]
+ * Bookings, the blocked period and the preview are removed again unless --keep is given.
+ */
+if (PHP_SAPI !== 'cli') {
+    exit;
+}
+define('_PS_ADMIN_DIR_', __DIR__);
+require __DIR__.'/../config/config.inc.php';
+require_once _PS_MODULE_DIR_.'occupancyplan/classes/OccupancyPlanRenderer.php';
+
+$keep = in_array('--keep', $argv, true);
+$preview = isset($argv[1]) && $argv[1] !== '--keep' ? $argv[1] : null;
+$fail = 0;
+function check($c, $m)
+{
+    global $fail;
+    echo ($c ? '  [ok] ' : '  [FAIL] ').$m.PHP_EOL;
+    $fail += $c ? 0 : 1;
+}
+
+if (!Module::isInstalled('occupancyplan')) {
+    check(Module::getInstanceByName('occupancyplan')->install(), 'module installed');
+}
+check((bool)Tab::getIdFromClassName('AdminOccupancyPlan'), 'admin tab "Belegungsplan" exists');
+
+$db = Db::getInstance();
+$rooms = $db->executeS('SELECT `id`, `id_product`, `room_num` FROM `'._DB_PREFIX_.'htl_room_information` ORDER BY `id` LIMIT 6');
+$d = function ($n) { return date('Y-m-d', strtotime(($n >= 0 ? '+' : '').$n.' day')); };
+$guests = array(
+    array($rooms[0], -4, 2, 3, 'Anna', 'Becker', 2, 0),     // checked out, ends today+? no: -4..2? see dates below
+    array($rooms[1], -1, 3, 2, 'Luca', 'Rossi', 2, 1),       // checked in
+    array($rooms[2], 2, 6, 1, 'Mia', 'Schneider', 1, 0),     // booked
+    array($rooms[3], -6, -1, 3, 'Jonas', 'Weber', 2, 0),     // checked out
+    array($rooms[4], 5, 30, 1, 'Familie', 'Mirabile-Test', 2, 2), // long stay beyond the view
+    array($rooms[1], 3, 5, 1, 'Ole', 'Hansen', 1, 0),        // next guest in the same room
+    array($rooms[5], 0, 1, 4, 'Kein', 'Erscheinen', 2, 0),   // no-show
+);
+$ids = array();
+$customers = array();
+foreach ($guests as $g) {
+    list($room, $from, $to, $status, $fn, $ln, $ad, $ch) = $g;
+    $c = new Customer();
+    $c->firstname = $fn;
+    $c->lastname = $ln;
+    $c->email = 'op-test-'.uniqid().'@hotel.test';
+    $c->passwd = Tools::passwdGen(16);
+    $c->add();
+    $customers[] = (int)$c->id;
+    $db->insert('htl_booking_detail', array(
+        'id_product' => (int)$room['id_product'], 'id_order' => 0, 'id_order_detail' => 1, 'id_cart' => 1, 'id_room' => (int)$room['id'],
+        'id_hotel' => 1, 'id_customer' => (int)$c->id, 'booking_type' => 1, 'id_status' => $status,
+        'check_in' => '0000-00-00 00:00:00', 'check_out' => '0000-00-00 00:00:00', 'planned_check_out' => $d($to).' 11:00:00',
+        'date_from' => $d($from).' 00:00:00', 'date_to' => $d($to).' 00:00:00',
+        'total_price_tax_excl' => 100, 'total_price_tax_incl' => 107, 'total_paid_amount' => 0, 'is_back_order' => 0,
+        'hotel_name' => 'Test', 'room_type_name' => 'Test', 'room_num' => $room['room_num'], 'adults' => $ad, 'children' => $ch,
+        'city' => 'Annweiler', 'country' => 'Deutschland', 'phone' => '0', 'email' => 'test@hotel.test',
+        'check_in_time' => '15:00', 'check_out_time' => '11:00', 'date_add' => date('Y-m-d H:i:s'), 'date_upd' => date('Y-m-d H:i:s'),
+    ));
+    $ids[] = (int)$db->Insert_ID();
+}
+$db->insert('htl_room_disable_dates', array('id_room_type' => (int)$rooms[5]['id_product'], 'id_room' => (int)$rooms[5]['id'],
+    'date_from' => $d(4), 'date_to' => $d(8), 'reason' => 'Malerarbeiten', 'date_add' => date('Y-m-d H:i:s'), 'date_upd' => date('Y-m-d H:i:s')));
+$idBlock = (int)$db->Insert_ID();
+
+try {
+    $plan = new OccupancyPlanRenderer($d(-2), 21);
+    $html = $plan->render(function ($id) { return '#order-'.$id; });
+    check(substr_count($html, 'class="op-bar op-in') === 2, 'one checked-in bar (+ legend)');
+    check(substr_count($html, 'class="op-bar op-assigned') >= 3, 'booked bars incl. legend');
+    check(substr_count($html, 'op-cut-l') >= 1, 'stay starting before the view is cut on the left');
+    check(substr_count($html, 'op-cut-r') >= 1, 'long stay is cut on the right');
+    check(strpos($html, 'Malerarbeiten') !== false, 'blocked period with reason');
+    check(substr_count($html, 'op-today') >= 2, 'today highlighted');
+    check(strpos($html, '<script') === false, 'no script in output');
+    check(substr_count($html, 'op-free') > 50 && substr_count($html, 'op-busy') > 10, 'free and busy cells marked');
+    check(strpos($html, 'data-room-type=') !== false && strpos($html, 'data-date="'.$d(0).'"') !== false, 'cells carry room type and date for reserving');
+    $s = OccupancyPlanRenderer::source(array('source_code' => 'BOOKING_COM', 'source_name' => 'Booking.com', 'id_business_source' => 2));
+    check($s[0] === 'B' && $s[2] === 'op-src-ota', 'Booking.com badge "B" styled as portal');
+    $s = OccupancyPlanRenderer::source(array('source_code' => 'PHONE', 'source_name' => 'Telefon', 'id_business_source' => 1));
+    check($s[0] === 'T' && $s[2] === '', 'phone badge "T"');
+    $found = 0;
+    foreach ($plan->getBookings() as $list) {
+        foreach ($list as $bk) {
+            $found += in_array((int)$bk['id'], $ids, true) ? 1 : 0;
+        }
+    }
+    check($found === 7, 'all 7 test bookings found (got '.$found.')');
+    if ($preview) {
+        file_put_contents($preview, '<!doctype html><meta charset="utf-8"><title>Belegungsplan Vorschau</title>'
+            .'<body style="font-family:Open Sans,Arial,sans-serif;margin:16px;background:#eff1f2">'
+            .'<div data-reserve-url="#book-now?controller=AdminHotelRoomsBooking" style="background:#fff;padding:12px;border-radius:4px">'
+            .'<h3 style="margin-top:0">Belegungsplan (Vorschau mit Testbuchungen)</h3>'.$html.'</div>'
+            .'<script>'.file_get_contents(_PS_MODULE_DIR_.'occupancyplan/views/js/occupancyplan.js').'</script></body>');
+        echo "Preview: $preview\n";
+    }
+} finally {
+    if (!$keep) {
+        $db->delete('htl_booking_detail', '`id` IN ('.implode(',', $ids).')');
+        $db->delete('htl_room_disable_dates', '`id` = '.$idBlock);
+        foreach ($customers as $idc) {
+            (new Customer($idc))->delete();
+        }
+    }
+}
+echo $fail ? "$fail check(s) FAILED\n" : "All checks passed\n";
+exit($fail ? 1 : 0);
diff --git a/modules/occupancyplan/classes/OccupancyPlanRenderer.php b/modules/occupancyplan/classes/OccupancyPlanRenderer.php
new file mode 100644
index 000000000..6b915d1b9
--- /dev/null
+++ b/modules/occupancyplan/classes/OccupancyPlanRenderer.php
@@ -0,0 +1,314 @@
+<?php
+/**
+ * Occupancy plan (tape chart): rooms as rows, days as columns, bookings as bars.
+ * Pure data + HTML rendering so it can be used by the admin controller and tested from CLI.
+ */
+class OccupancyPlanRenderer
+{
+    const STATUS_ASSIGNED = 1;
+    const STATUS_CHECKED_IN = 2;
+    const STATUS_CHECKED_OUT = 3;
+    const STATUS_NO_SHOW = 4;
+    const STATUS_CANCELLED = 5;
+
+    protected $from;
+    protected $days;
+    protected $idHotel;
+    protected $idLang;
+
+    /**
+     * @param string $from first day (Y-m-d)
+     * @param int $days number of days shown
+     */
+    public function __construct($from, $days, $idHotel = 0, $idLang = null)
+    {
+        $this->from = date('Y-m-d', strtotime($from));
+        $this->days = max(7, min(62, (int)$days));
+        $this->idHotel = (int)$idHotel;
+        $this->idLang = $idLang ?: (int)Configuration::get('PS_LANG_DEFAULT');
+    }
+
+    public function getTo()
+    {
+        return date('Y-m-d', strtotime($this->from.' +'.$this->days.' day'));
+    }
+
+    /** @return array rooms grouped by room type */
+    public function getRooms()
+    {
+        $sql = 'SELECT ri.`id`, ri.`room_num`, ri.`id_status`, ri.`id_product`, ri.`id_hotel`, pl.`name` AS room_type
+            FROM `'._DB_PREFIX_.'htl_room_information` ri
+            LEFT JOIN `'._DB_PREFIX_.'product_lang` pl ON pl.`id_product` = ri.`id_product` AND pl.`id_lang` = '.(int)$this->idLang.'
+            WHERE 1'.($this->idHotel ? ' AND ri.`id_hotel` = '.(int)$this->idHotel : '').'
+            ORDER BY ri.`id_hotel`, pl.`name`, ri.`room_num`';
+        return (array)Db::getInstance()->executeS($sql);
+    }
+
+    /** @return array bookings overlapping the shown period, keyed by id_room */
+    public function getBookings()
+    {
+        $to = $this->getTo();
+        $hasCaspos = (bool)Db::getInstance()->getValue('SELECT COUNT(*) FROM information_schema.tables
+            WHERE table_schema = DATABASE() AND table_name = \''._DB_PREFIX_.'casposbridge_job\'');
+        $sql = 'SELECT bd.`id`, bd.`id_room`, bd.`id_order`, bd.`id_status`, bd.`adults`, bd.`children`,
+                DATE(bd.`date_from`) AS date_from, DATE(bd.`date_to`) AS date_to, bd.`room_type_name`,
+                bd.`total_price_tax_incl`, c.`firstname`, c.`lastname`, o.`reference`,
+                src.`code` AS source_code, srcl.`name` AS source_name, src.`id_business_source`, o.`source` AS source_raw'
+                .($hasCaspos ? ', (SELECT COUNT(*) FROM `'._DB_PREFIX_.'casposbridge_job` j WHERE j.`id_htl_booking` = bd.`id` AND j.`status` = \'done\') AS pos_done,
+                   (SELECT COUNT(*) FROM `'._DB_PREFIX_.'casposbridge_job` j WHERE j.`id_htl_booking` = bd.`id` AND j.`status` = \'failed\') AS pos_failed' : '').'
+            FROM `'._DB_PREFIX_.'htl_booking_detail` bd
+            LEFT JOIN `'._DB_PREFIX_.'customer` c ON c.`id_customer` = bd.`id_customer`
+            LEFT JOIN `'._DB_PREFIX_.'orders` o ON o.`id_order` = bd.`id_order`
+            LEFT JOIN `'._DB_PREFIX_.'source` src ON src.`id_source` = o.`id_source`
+            LEFT JOIN `'._DB_PREFIX_.'source_lang` srcl ON srcl.`id_source` = src.`id_source` AND srcl.`id_lang` = '.(int)$this->idLang.'
+            WHERE bd.`date_from` < \''.pSQL($to).'\' AND bd.`date_to` > \''.pSQL($this->from).'\'
+              AND bd.`id_status` <> '.self::STATUS_CANCELLED.' AND bd.`is_back_order` = 0'
+              .(method_exists('OrderReturn', 'getRefundedBookingIdsSubquery') ? ' AND bd.`id` NOT IN ('.OrderReturn::getRefundedBookingIdsSubquery().')' : '')
+              .($this->idHotel ? ' AND bd.`id_hotel` = '.(int)$this->idHotel : '').'
+            ORDER BY bd.`date_from`';
+        $out = array();
+        foreach ((array)Db::getInstance()->executeS($sql) as $b) {
+            $out[(int)$b['id_room']][] = $b;
+        }
+        return $out;
+    }
+
+    /** @return array blocked periods keyed by id_room */
+    public function getBlocked()
+    {
+        $to = $this->getTo();
+        $out = array();
+        foreach ((array)Db::getInstance()->executeS('SELECT `id_room`, `date_from`, `date_to`, `reason`
+            FROM `'._DB_PREFIX_.'htl_room_disable_dates`
+            WHERE `date_from` < \''.pSQL($to).'\' AND `date_to` > \''.pSQL($this->from).'\'') as $d) {
+            $out[(int)$d['id_room']][] = $d;
+        }
+        return $out;
+    }
+
+    /** column index (0-based) of a date, clamped to the visible period */
+    protected function col($date)
+    {
+        $d = (int)round((strtotime($date) - strtotime($this->from)) / 86400);
+        return max(0, min($this->days, $d));
+    }
+
+    protected static function e($s)
+    {
+        return htmlspecialchars((string)$s, ENT_QUOTES, 'UTF-8');
+    }
+
+    /**
+     * @param callable|null $orderLink function(int $idOrder): string
+     * @param array $labels translated UI strings
+     */
+    public function render($orderLink = null, array $labels = array())
+    {
+        $L = array_merge(array(
+            'room' => 'Zimmer', 'occupied' => 'Belegt', 'blocked' => 'Gesperrt', 'assigned' => 'Gebucht',
+            'checked_in' => 'Eingecheckt', 'checked_out' => 'Ausgecheckt', 'no_show' => 'Nicht erschienen',
+            'inactive' => 'inaktiv', 'nights' => 'Nächte', 'order' => 'Buchung', 'guests' => 'Gäste',
+            'pos' => 'An Kasse gebucht', 'pos_failed' => 'Kassenbuchung fehlgeschlagen', 'no_rooms' => 'Keine Zimmer angelegt.',
+        ), $labels);
+        $weekdays = array('So', 'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa');
+        $months = array(1 => 'Januar', 'Februar', 'März', 'April', 'Mai', 'Juni', 'Juli', 'August', 'September', 'Oktober', 'November', 'Dezember');
+        $statusClass = array(
+            self::STATUS_ASSIGNED => array('op-assigned', $L['assigned']),
+            self::STATUS_CHECKED_IN => array('op-in', $L['checked_in']),
+            self::STATUS_CHECKED_OUT => array('op-out', $L['checked_out']),
+            self::STATUS_NO_SHOW => array('op-noshow', $L['no_show']),
+        );
+
+        $rooms = $this->getRooms();
+        if (!$rooms) {
+            return '<div class="alert alert-info">'.self::e($L['no_rooms']).'</div>';
+        }
+        $bookings = $this->getBookings();
+        $blocked = $this->getBlocked();
+        $today = date('Y-m-d');
+        $cols = 'grid-template-columns: 11rem repeat('.$this->days.', minmax(2.4rem, 1fr));';
+
+        // header: month row + day row
+        $h = '<div class="op-row op-head" style="'.$cols.'"><div class="op-label"></div>';
+        $monthStart = 0;
+        for ($i = 0; $i <= $this->days; $i++) {
+            $d = date('Y-m-d', strtotime($this->from.' +'.$i.' day'));
+            if ($i === $this->days || ($i > 0 && date('j', strtotime($d)) == 1)) {
+                $m = date('Y-m-d', strtotime($this->from.' +'.$monthStart.' day'));
+                $h .= '<div class="op-month" style="grid-column:'.($monthStart + 2).' / '.($i + 2).'">'
+                    .self::e($months[(int)date('n', strtotime($m))].' '.date('Y', strtotime($m))).'</div>';
+                $monthStart = $i;
+            }
+        }
+        $h .= '</div><div class="op-row op-head" style="'.$cols.'"><div class="op-label">'.self::e($L['room']).'</div>';
+        for ($i = 0; $i < $this->days; $i++) {
+            $d = date('Y-m-d', strtotime($this->from.' +'.$i.' day'));
+            $w = (int)date('w', strtotime($d));
+            $cls = 'op-day'.($w === 0 || $w === 6 ? ' op-we' : '').($d === $today ? ' op-today' : '');
+            $h .= '<div class="'.$cls.'" title="'.self::e(date('d.m.Y', strtotime($d))).'"><span>'.$weekdays[$w].'</span><b>'.date('j', strtotime($d)).'</b></div>';
+        }
+        $h .= '</div>';
+
+        // rows
+        $occupied = array_fill(0, $this->days, 0);
+        $activeRooms = 0;
+        $body = '';
+        $lastType = null;
+        foreach ($rooms as $r) {
+            if ($r['room_type'] !== $lastType) {
+                $body .= '<div class="op-group">'.self::e($r['room_type']).'</div>';
+                $lastType = $r['room_type'];
+            }
+            $inactive = (int)$r['id_status'] === 2;
+            if (!$inactive) {
+                $activeRooms++;
+            }
+            $roomBookings = isset($bookings[(int)$r['id']]) ? $bookings[(int)$r['id']] : array();
+            $roomBlocked = isset($blocked[(int)$r['id']]) ? $blocked[(int)$r['id']] : array();
+            // nights that cannot be reserved (booked or blocked)
+            $busy = array();
+            foreach (array_merge($roomBookings, $roomBlocked) as $x) {
+                for ($i = $this->col($x['date_from']); $i < $this->col($x['date_to']); $i++) {
+                    $busy[$i] = true;
+                }
+            }
+            $body .= '<div class="op-row'.($inactive ? ' op-inactive' : '').'" style="'.$cols.'" data-room="'.(int)$r['id'].'"'
+                .' data-room-num="'.self::e($r['room_num']).'" data-room-type="'.(int)$r['id_product'].'" data-hotel="'.(int)$r['id_hotel'].'">';
+            $body .= '<div class="op-label"><b>'.self::e($r['room_num']).'</b>'.($inactive ? ' <small>'.self::e($L['inactive']).'</small>' : '').'</div>';
+            for ($i = 0; $i < $this->days; $i++) {
+                $d = date('Y-m-d', strtotime($this->from.' +'.$i.' day'));
+                $w = (int)date('w', strtotime($d));
+                $free = !$inactive && empty($busy[$i]) && $d >= $today;
+                $body .= '<div class="op-cell'.($w === 0 || $w === 6 ? ' op-we' : '').($d === $today ? ' op-today' : '').($free ? ' op-free' : ' op-busy').'"'
+                    .' style="grid-column:'.($i + 2).'" data-date="'.$d.'"'.($free ? ' tabindex="0" role="button" aria-label="'.self::e($r['room_num'].' '.date('d.m.Y', strtotime($d))).'"' : '').'></div>';
+            }
+            foreach ($roomBlocked as $bl) {
+                $s = $this->col($bl['date_from']);
+                $e = $this->col($bl['date_to']);
+                if ($e > $s) {
+                    $body .= '<div class="op-bar op-blocked" style="grid-column:'.($s + 2).' / '.($e + 2).'" title="'.self::e($L['blocked'].': '.date('d.m.', strtotime($bl['date_from'])).'–'.date('d.m.Y', strtotime($bl['date_to'])).($bl['reason'] ? ' – '.$bl['reason'] : '')).'">'.self::e($L['blocked']).'</div>';
+                }
+            }
+            foreach ($roomBookings as $b) {
+                $s = $this->col($b['date_from']);
+                $e = $this->col($b['date_to']);
+                if ($e <= $s) {
+                    continue;
+                }
+                for ($i = $s; $i < $e; $i++) {
+                    $occupied[$i]++;
+                }
+                list($cls, $statusName) = isset($statusClass[(int)$b['id_status']]) ? $statusClass[(int)$b['id_status']] : array('op-assigned', '');
+                $name = trim($b['firstname'].' '.$b['lastname']) ?: '#'.$b['id_order'];
+                $guests = (int)$b['adults'].((int)$b['children'] ? '+'.(int)$b['children'] : '');
+                $nights = (int)round((strtotime($b['date_to']) - strtotime($b['date_from'])) / 86400);
+                $pos = '';
+                if (isset($b['pos_done'])) {
+                    if ((int)$b['pos_failed']) {
+                        $pos = '<i class="op-pos op-pos-failed" title="'.self::e($L['pos_failed']).'">!</i>';
+                    } elseif ((int)$b['pos_done']) {
+                        $pos = '<i class="op-pos" title="'.self::e($L['pos'].': '.(int)$b['pos_done'].' '.$L['nights']).'">€'.(int)$b['pos_done'].'</i>';
+                    }
+                }
+                list($srcShort, $srcName, $srcClass) = self::source($b);
+                $title = $name.' – '.$statusName.($srcName ? ' · '.$srcName : '')."\n"
+                    .date('d.m.', strtotime($b['date_from'])).' – '.date('d.m.Y', strtotime($b['date_to'])).' ('.$nights.' '.$L['nights'].')'."\n"
+                    .$L['guests'].': '.$guests.' · '.$L['order'].' '.($b['reference'] ?: '#'.$b['id_order'])
+                    .' · '.number_format((float)$b['total_price_tax_incl'], 2, ',', '.').' €';
+                $cut = ($b['date_from'] < $this->from ? ' op-cut-l' : '').($b['date_to'] > $this->getTo() ? ' op-cut-r' : '');
+                $tag = $orderLink && (int)$b['id_order'] ? 'a href="'.self::e(call_user_func($orderLink, (int)$b['id_order'])).'"' : 'div';
+                $src = $srcShort ? '<i class="op-src '.$srcClass.'">'.self::e($srcShort).'</i>' : '';
+                $body .= '<'.$tag.' class="op-bar '.$cls.$cut.'" style="grid-column:'.($s + 2).' / '.($e + 2).'" title="'.self::e($title).'">'
+                    .$src.'<span>'.self::e($name).' <small>('.self::e($guests).')</small></span>'.$pos.'</'.explode(' ', $tag)[0].'>';
+            }
+            $body .= '</div>';
+        }
+
+        // occupancy footer
+        $f = '<div class="op-row op-foot" style="'.$cols.'"><div class="op-label">'.self::e($L['occupied']).'</div>';
+        for ($i = 0; $i < $this->days; $i++) {
+            $pct = $activeRooms ? round($occupied[$i] * 100 / $activeRooms) : 0;
+            $f .= '<div class="op-occ" title="'.$occupied[$i].' / '.$activeRooms.'" style="--p:'.$pct.'%"><span>'.$occupied[$i].'</span></div>';
+        }
+        $f .= '</div>';
+
+        $legend = '<div class="op-legend">';
+        foreach ($statusClass as $sc) {
+            $legend .= '<span class="op-bar '.$sc[0].'">'.self::e($sc[1]).'</span>';
+        }
+        $legend .= '<span class="op-bar op-blocked">'.self::e($L['blocked']).'</span>';
+        $legend .= '<span><i class="op-pos">€2</i> '.self::e($L['pos']).'</span>';
+        $legend .= '<span><i class="op-src op-src-ota">B</i> Booking.com</span><span><i class="op-src op-src-ota">E</i> Expedia</span>'
+            .'<span><i class="op-src">W</i> Website</span><span><i class="op-src">T</i> Telefon</span><span><i class="op-src">@</i> E-Mail</span></div>';
+
+        return '<div class="op-wrap"><div class="op-grid" style="min-width:calc(11rem + '.$this->days.' * 2.4rem)">'.$h.$body.$f.'</div></div>'.$legend.self::css();
+    }
+
+    /**
+     * Short badge for the booking source (orders.id_source -> source.code).
+     * @return array [short, name, css class]
+     */
+    public static function source(array $b)
+    {
+        $map = array(
+            'DIRECT_WEBSITE' => 'W', 'WALKIN' => 'L', 'PHONE' => 'T', 'EMAIL' => '@', 'SOCIAL_MEDIA' => 'S', 'WHATSAPP' => 'WA',
+            'BOOKING_COM' => 'B', 'EXPEDIA' => 'E', 'AIRBNB' => 'A', 'AGODA' => 'AG', 'TRIP_COM' => 'TC',
+        );
+        $code = isset($b['source_code']) ? (string)$b['source_code'] : '';
+        if ($code === '') {
+            return array('', isset($b['source_raw']) ? (string)$b['source_raw'] : '', '');
+        }
+        $short = isset($map[$code]) ? $map[$code] : Tools::strtoupper(Tools::substr($code, 0, 2));
+        $ota = (int)(isset($b['id_business_source']) ? $b['id_business_source'] : 0) === 2;
+        return array($short, (string)$b['source_name'], $ota ? 'op-src-ota' : '');
+    }
+
+    public static function css()
+    {
+        return '<style>
+.op-wrap{overflow-x:auto;border:1px solid #d9dee3;border-radius:4px;background:#fff}
+.op-grid{font-size:12px}
+.op-row{display:grid;align-items:stretch;border-bottom:1px solid #eef1f4;min-height:34px;position:relative}
+.op-row:hover .op-label{background:#f3f6f9}
+.op-label{position:sticky;left:0;z-index:3;background:#fff;padding:6px 8px;border-right:1px solid #d9dee3;display:flex;align-items:center;gap:6px;grid-row:1}
+.op-head{min-height:0;background:#f8fafb}
+.op-head .op-label{background:#f8fafb;font-weight:600}
+.op-month{grid-row:1;padding:4px 6px;font-weight:600;border-left:1px solid #d9dee3;white-space:nowrap}
+.op-day{grid-row:1;text-align:center;padding:3px 0;border-left:1px solid #eef1f4;line-height:1.2}
+.op-day span{display:block;color:#7a8794;font-size:10px}
+.op-cell{grid-row:1;border-left:1px solid #eef1f4}
+.op-we{background:#f6f7f9}
+.op-today{background:#fff4d6!important;box-shadow:inset 2px 0 0 #e0a800}
+.op-group{padding:5px 8px;background:#eef2f6;font-weight:600;border-bottom:1px solid #d9dee3;position:sticky;left:0}
+.op-inactive .op-label{color:#9aa5b1}
+.op-bar{grid-row:1;z-index:2;margin:5px 2px;border-radius:4px;padding:2px 6px;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center;justify-content:space-between;gap:4px;text-decoration:none;font-weight:600;min-width:0}
+a.op-bar:hover,a.op-bar:focus{color:#fff;text-decoration:none;filter:brightness(1.08);outline:2px solid #1f2d3d;outline-offset:1px}
+.op-bar span{overflow:hidden;text-overflow:ellipsis}
+.op-bar small{font-weight:400;opacity:.9}
+.op-assigned{background:#2f7fc1}
+.op-in{background:#2e8b57}
+.op-out{background:#8a96a3}
+.op-noshow{background:repeating-linear-gradient(135deg,#d9822b 0 6px,#c06f1f 6px 12px)}
+.op-blocked{background:repeating-linear-gradient(135deg,#b8c0c8 0 5px,#a3acb6 5px 10px);color:#1f2d3d;font-weight:400}
+.op-cut-l{border-top-left-radius:0;border-bottom-left-radius:0;margin-left:0}
+.op-cut-r{border-top-right-radius:0;border-bottom-right-radius:0;margin-right:0}
+.op-pos{font-style:normal;background:rgba(255,255,255,.25);border-radius:3px;padding:0 4px;font-size:10px;flex:none}
+.op-pos-failed{background:#c0392b}
+.op-src{font-style:normal;flex:none;background:#fff;color:#1f2d3d;border-radius:3px;padding:0 3px;font-size:10px;font-weight:700;line-height:15px}
+.op-src-ota{background:#003580;color:#fff}
+.op-free{cursor:pointer}
+.op-free:hover,.op-free:focus{background:#e3f0fb;outline:none}
+.op-sel{background:#cfe6fa!important;box-shadow:inset 0 0 0 1px #2f7fc1}
+.op-actionbar{position:sticky;bottom:0;z-index:5;display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:10px;padding:10px 12px;background:#1f2d3d;color:#fff;border-radius:4px;box-shadow:0 -4px 12px rgba(0,0,0,.15)}
+.op-actionbar[hidden]{display:none}
+.op-actiontext{flex:1 1 20rem;font-weight:600}
+.op-foot{background:#f8fafb;min-height:26px}
+.op-foot .op-label{background:#f8fafb;font-weight:600}
+.op-occ{grid-row:1;border-left:1px solid #eef1f4;display:flex;align-items:flex-end;justify-content:center;background:linear-gradient(to top,#cfe3f3 var(--p),transparent var(--p));font-size:11px;padding-bottom:2px}
+.op-legend{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 0;align-items:center}
+.op-legend .op-bar{display:inline-block;margin:0}
+.op-legend .op-pos{background:#2e8b57;color:#fff}
+@media (prefers-reduced-motion:reduce){*{transition:none!important}}
+</style>';
+    }
+}
diff --git a/modules/occupancyplan/classes/index.php b/modules/occupancyplan/classes/index.php
new file mode 100644
index 000000000..409280877
--- /dev/null
+++ b/modules/occupancyplan/classes/index.php
@@ -0,0 +1,32 @@
+<?php
+/**
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Open Software License version 3.0
+* that is bundled with this package in the file LICENSE.md
+* It is also available through the world-wide-web at this URL:
+* https://opensource.org/license/osl-3-0-php
+* If you did not receive a copy of the license and are unable to
+* obtain it through the world-wide-web, please send an email
+* to support@qloapps.com so we can send you a copy immediately.
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade this module to a newer
+* versions in the future. If you wish to customize this module for your needs
+* please refer to https://store.webkul.com/customisation-guidelines for more information.
+*
+* @author Webkul IN
+* @copyright Since 2010 Webkul
+* @license https://opensource.org/license/osl-3-0-php Open Software License version 3.0
+*/
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../../../');
+exit;
diff --git a/modules/occupancyplan/controllers/admin/AdminOccupancyPlanController.php b/modules/occupancyplan/controllers/admin/AdminOccupancyPlanController.php
new file mode 100644
index 000000000..63a7409a1
--- /dev/null
+++ b/modules/occupancyplan/controllers/admin/AdminOccupancyPlanController.php
@@ -0,0 +1,79 @@
+<?php
+
+require_once _PS_MODULE_DIR_.'occupancyplan/classes/OccupancyPlanRenderer.php';
+
+class AdminOccupancyPlanController extends ModuleAdminController
+{
+    public function __construct()
+    {
+        $this->bootstrap = true;
+        $this->display = 'view';
+        parent::__construct();
+        $this->meta_title = $this->l('Belegungsplan');
+    }
+
+    public function initToolbar()
+    {
+        parent::initToolbar();
+        unset($this->toolbar_btn['new']);
+    }
+
+    public function setMedia()
+    {
+        parent::setMedia();
+        $this->addJS(_MODULE_DIR_.'occupancyplan/views/js/occupancyplan.js');
+    }
+
+    public function renderView()
+    {
+        $days = (int)Tools::getValue('days', 21);
+        $from = Tools::getValue('from');
+        if (!$from || !Validate::isDate($from)) {
+            $from = date('Y-m-d', strtotime('-2 day'));
+        }
+        $idHotel = (int)Tools::getValue('id_hotel');
+        $plan = new OccupancyPlanRenderer($from, $days, $idHotel, (int)$this->context->language->id);
+
+        $base = self::$currentIndex.'&token='.$this->token;
+        $nav = function ($shift) use ($from, $days, $idHotel, $base) {
+            return $base.'&from='.date('Y-m-d', strtotime($from.' '.$shift)).'&days='.(int)$days.($idHotel ? '&id_hotel='.$idHotel : '');
+        };
+        $link = $this->context->link;
+        $orderLink = function ($idOrder) use ($link) {
+            return $link->getAdminLink('AdminOrders').'&id_order='.(int)$idOrder.'&vieworder';
+        };
+
+        $hotels = Db::getInstance()->executeS('SELECT hbi.`id`, hbil.`hotel_name` FROM `'._DB_PREFIX_.'htl_branch_info` hbi
+            LEFT JOIN `'._DB_PREFIX_.'htl_branch_info_lang` hbil ON hbil.`id` = hbi.`id` AND hbil.`id_lang` = '.(int)$this->context->language->id.'
+            WHERE hbi.`active` = 1');
+        $e = function ($s) { return htmlspecialchars((string)$s, ENT_QUOTES, 'UTF-8'); };
+
+        $form = '<form method="get" action="index.php" class="form-inline op-nav">'
+            .'<input type="hidden" name="controller" value="AdminOccupancyPlan"><input type="hidden" name="token" value="'.$e($this->token).'">'
+            .'<a class="btn btn-default" href="'.$e($nav('-7 day')).'"><i class="icon-chevron-left"></i> '.$this->l('Woche').'</a> '
+            .'<a class="btn btn-default" href="'.$e($base.'&days='.(int)$days.($idHotel ? '&id_hotel='.$idHotel : '')).'">'.$this->l('Heute').'</a> '
+            .'<a class="btn btn-default" href="'.$e($nav('+7 day')).'">'.$this->l('Woche').' <i class="icon-chevron-right"></i></a> '
+            .'<label for="op-from">'.$this->l('ab').'</label> <input id="op-from" type="date" class="form-control" name="from" value="'.$e($from).'"> '
+            .'<label for="op-days">'.$this->l('Tage').'</label> <select id="op-days" class="form-control" name="days">';
+        foreach (array(14, 21, 31, 45, 62) as $d) {
+            $form .= '<option value="'.$d.'"'.($d == $days ? ' selected' : '').'>'.$d.'</option>';
+        }
+        $form .= '</select> ';
+        if (count($hotels) > 1) {
+            $form .= '<select class="form-control" name="id_hotel" aria-label="'.$e($this->l('Hotel')).'"><option value="0">'.$this->l('Alle Hotels').'</option>';
+            foreach ($hotels as $h) {
+                $form .= '<option value="'.(int)$h['id'].'"'.($h['id'] == $idHotel ? ' selected' : '').'>'.$e($h['hotel_name']).'</option>';
+            }
+            $form .= '</select> ';
+        }
+        $form .= '<button class="btn btn-primary" type="submit">'.$this->l('Anzeigen').'</button></form>';
+
+        // "Book Now" with dates/hotel/room type taken over from the selection (see views/js/occupancyplan.js)
+        $reserveUrl = $link->getAdminLink('AdminHotelRoomsBooking');
+        $hint = '<p class="help-block">'.$this->l('Reservieren: freie Zelle anklicken (erste Nacht), dann die letzte Nacht in derselben Zeile anklicken.').'</p>';
+
+        return '<div class="panel" data-reserve-url="'.$e($reserveUrl).'"><div class="panel-heading"><i class="icon-calendar"></i> '.$this->l('Belegungsplan').'</div>'
+            .$form.$hint.'<style>.op-nav{margin-bottom:12px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}</style>'
+            .$plan->render($orderLink).'</div>';
+    }
+}
diff --git a/modules/occupancyplan/controllers/admin/index.php b/modules/occupancyplan/controllers/admin/index.php
new file mode 100644
index 000000000..409280877
--- /dev/null
+++ b/modules/occupancyplan/controllers/admin/index.php
@@ -0,0 +1,32 @@
+<?php
+/**
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Open Software License version 3.0
+* that is bundled with this package in the file LICENSE.md
+* It is also available through the world-wide-web at this URL:
+* https://opensource.org/license/osl-3-0-php
+* If you did not receive a copy of the license and are unable to
+* obtain it through the world-wide-web, please send an email
+* to support@qloapps.com so we can send you a copy immediately.
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade this module to a newer
+* versions in the future. If you wish to customize this module for your needs
+* please refer to https://store.webkul.com/customisation-guidelines for more information.
+*
+* @author Webkul IN
+* @copyright Since 2010 Webkul
+* @license https://opensource.org/license/osl-3-0-php Open Software License version 3.0
+*/
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../../../');
+exit;
diff --git a/modules/occupancyplan/controllers/index.php b/modules/occupancyplan/controllers/index.php
new file mode 100644
index 000000000..409280877
--- /dev/null
+++ b/modules/occupancyplan/controllers/index.php
@@ -0,0 +1,32 @@
+<?php
+/**
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Open Software License version 3.0
+* that is bundled with this package in the file LICENSE.md
+* It is also available through the world-wide-web at this URL:
+* https://opensource.org/license/osl-3-0-php
+* If you did not receive a copy of the license and are unable to
+* obtain it through the world-wide-web, please send an email
+* to support@qloapps.com so we can send you a copy immediately.
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade this module to a newer
+* versions in the future. If you wish to customize this module for your needs
+* please refer to https://store.webkul.com/customisation-guidelines for more information.
+*
+* @author Webkul IN
+* @copyright Since 2010 Webkul
+* @license https://opensource.org/license/osl-3-0-php Open Software License version 3.0
+*/
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../../../');
+exit;
diff --git a/modules/occupancyplan/index.php b/modules/occupancyplan/index.php
new file mode 100644
index 000000000..409280877
--- /dev/null
+++ b/modules/occupancyplan/index.php
@@ -0,0 +1,32 @@
+<?php
+/**
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Open Software License version 3.0
+* that is bundled with this package in the file LICENSE.md
+* It is also available through the world-wide-web at this URL:
+* https://opensource.org/license/osl-3-0-php
+* If you did not receive a copy of the license and are unable to
+* obtain it through the world-wide-web, please send an email
+* to support@qloapps.com so we can send you a copy immediately.
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade this module to a newer
+* versions in the future. If you wish to customize this module for your needs
+* please refer to https://store.webkul.com/customisation-guidelines for more information.
+*
+* @author Webkul IN
+* @copyright Since 2010 Webkul
+* @license https://opensource.org/license/osl-3-0-php Open Software License version 3.0
+*/
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../../../');
+exit;
diff --git a/modules/occupancyplan/logo.png b/modules/occupancyplan/logo.png
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diff --git a/modules/occupancyplan/occupancyplan.php b/modules/occupancyplan/occupancyplan.php
new file mode 100644
index 000000000..639cdad8b
--- /dev/null
+++ b/modules/occupancyplan/occupancyplan.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * Belegungsplan: back-office tape chart (rooms × days) under "Hotel Reservation System".
+ */
+
+if (!defined('_PS_VERSION_')) {
+    exit;
+}
+
+
+class Occupancyplan extends Module
+{
+    public function __construct()
+    {
+        $this->name = 'occupancyplan';
+        $this->tab = 'administration';
+        $this->version = '1.0.0';
+        $this->author = 'Zum alten Wasserrad';
+        $this->need_instance = 0;
+        $this->bootstrap = true;
+        parent::__construct();
+
+        $this->displayName = $this->l('Belegungsplan');
+        $this->description = $this->l('Zimmer × Tage mit allen Buchungen, Status und Sperrzeiten auf einen Blick.');
+        $this->ps_versions_compliancy = array('min' => '1.6', 'max' => '1.6.99.99');
+    }
+
+    public function install()
+    {
+        return parent::install() && $this->installTab();
+    }
+
+    public function uninstall()
+    {
+        $idTab = (int)Tab::getIdFromClassName('AdminOccupancyPlan');
+        if ($idTab) {
+            $tab = new Tab($idTab);
+            $tab->delete();
+        }
+        return parent::uninstall();
+    }
+
+    protected function installTab()
+    {
+        if (Tab::getIdFromClassName('AdminOccupancyPlan')) {
+            return true;
+        }
+        $tab = new Tab();
+        $tab->class_name = 'AdminOccupancyPlan';
+        $tab->module = $this->name;
+        $parent = (int)Tab::getIdFromClassName('AdminHotelReservationSystemManagement');
+        $tab->id_parent = $parent ?: 0;
+        foreach (Language::getLanguages(false) as $lang) {
+            $tab->name[$lang['id_lang']] = 'Belegungsplan';
+        }
+        // Tab::add() returns initAccess(), which is false without a logged-in employee (CLI);
+        // the tab itself is created either way.
+        $tab->add();
+        return (bool)$tab->id;
+    }
+
+    public function getContent()
+    {
+        Tools::redirectAdmin($this->context->link->getAdminLink('AdminOccupancyPlan'));
+    }
+}
diff --git a/modules/occupancyplan/views/index.php b/modules/occupancyplan/views/index.php
new file mode 100644
index 000000000..409280877
--- /dev/null
+++ b/modules/occupancyplan/views/index.php
@@ -0,0 +1,32 @@
+<?php
+/**
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Open Software License version 3.0
+* that is bundled with this package in the file LICENSE.md
+* It is also available through the world-wide-web at this URL:
+* https://opensource.org/license/osl-3-0-php
+* If you did not receive a copy of the license and are unable to
+* obtain it through the world-wide-web, please send an email
+* to support@qloapps.com so we can send you a copy immediately.
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade this module to a newer
+* versions in the future. If you wish to customize this module for your needs
+* please refer to https://store.webkul.com/customisation-guidelines for more information.
+*
+* @author Webkul IN
+* @copyright Since 2010 Webkul
+* @license https://opensource.org/license/osl-3-0-php Open Software License version 3.0
+*/
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../../../');
+exit;
diff --git a/modules/occupancyplan/views/js/index.php b/modules/occupancyplan/views/js/index.php
new file mode 100644
index 000000000..409280877
--- /dev/null
+++ b/modules/occupancyplan/views/js/index.php
@@ -0,0 +1,32 @@
+<?php
+/**
+* NOTICE OF LICENSE
+*
+* This source file is subject to the Open Software License version 3.0
+* that is bundled with this package in the file LICENSE.md
+* It is also available through the world-wide-web at this URL:
+* https://opensource.org/license/osl-3-0-php
+* If you did not receive a copy of the license and are unable to
+* obtain it through the world-wide-web, please send an email
+* to support@qloapps.com so we can send you a copy immediately.
+*
+* DISCLAIMER
+*
+* Do not edit or add to this file if you wish to upgrade this module to a newer
+* versions in the future. If you wish to customize this module for your needs
+* please refer to https://store.webkul.com/customisation-guidelines for more information.
+*
+* @author Webkul IN
+* @copyright Since 2010 Webkul
+* @license https://opensource.org/license/osl-3-0-php Open Software License version 3.0
+*/
+
+header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
+header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
+
+header('Cache-Control: no-store, no-cache, must-revalidate');
+header('Cache-Control: post-check=0, pre-check=0', false);
+header('Pragma: no-cache');
+
+header('Location: ../../../');
+exit;
diff --git a/modules/occupancyplan/views/js/occupancyplan.js b/modules/occupancyplan/views/js/occupancyplan.js
new file mode 100644
index 000000000..1ed8e14f6
--- /dev/null
+++ b/modules/occupancyplan/views/js/occupancyplan.js
@@ -0,0 +1,111 @@
+/**
+ * Belegungsplan: select free nights in one room row and hand them to "Book Now".
+ * Click (or Enter/Space) a free cell = first night, click a later free cell in the same row = last night.
+ * Escape cancels. The bar's "Reservieren" link opens AdminHotelRoomsBooking with dates and room type.
+ */
+(function () {
+    'use strict';
+
+    function init() {
+        var root = document.querySelector('[data-reserve-url]');
+        if (!root) {
+            return;
+        }
+        var sel = null; // {row, start, end} cells
+        var bar = document.createElement('div');
+        bar.className = 'op-actionbar';
+        bar.setAttribute('role', 'status');
+        bar.hidden = true;
+        bar.innerHTML = '<span class="op-actiontext"></span>'
+            + '<a class="btn btn-primary op-reserve" href="#"><i class="icon-plus"></i> Reservieren</a>'
+            + '<button type="button" class="btn btn-default op-cancel">Abbrechen</button>';
+        root.appendChild(bar);
+
+        var weekday = ['So', 'Mo', 'Di', 'Mi', 'Do', 'Fr', 'Sa'];
+        function fmt(iso) {
+            var p = iso.split('-');
+            var d = new Date(Date.UTC(+p[0], +p[1] - 1, +p[2]));
+            return weekday[d.getUTCDay()] + ' ' + p[2] + '.' + p[1] + '.';
+        }
+        function addDay(iso) {
+            var p = iso.split('-');
+            var d = new Date(Date.UTC(+p[0], +p[1] - 1, +p[2] + 1));
+            return d.toISOString().slice(0, 10);
+        }
+        function cells(row) {
+            return Array.prototype.slice.call(row.querySelectorAll('.op-cell'));
+        }
+        function clear() {
+            Array.prototype.forEach.call(root.querySelectorAll('.op-sel'), function (c) { c.classList.remove('op-sel'); });
+            sel = null;
+            bar.hidden = true;
+        }
+        function paint() {
+            Array.prototype.forEach.call(root.querySelectorAll('.op-sel'), function (c) { c.classList.remove('op-sel'); });
+            var list = cells(sel.row);
+            var a = list.indexOf(sel.start), b = list.indexOf(sel.end);
+            for (var i = a; i <= b; i++) {
+                list[i].classList.add('op-sel');
+            }
+            var from = sel.start.getAttribute('data-date');
+            var to = addDay(sel.end.getAttribute('data-date'));
+            var nights = b - a + 1;
+            bar.querySelector('.op-actiontext').textContent = 'Zimmer ' + sel.row.getAttribute('data-room-num') + ' · '
+                + fmt(from) + ' – ' + fmt(to) + ' · ' + nights + (nights === 1 ? ' Nacht' : ' Nächte')
+                + '  (in „Book Now“ dieses Zimmer auswählen)';
+            var url = root.getAttribute('data-reserve-url')
+                + '&date_from=' + from + '&date_to=' + to
+                + '&id_hotel=' + encodeURIComponent(sel.row.getAttribute('data-hotel'))
+                + '&id_room_type=' + encodeURIComponent(sel.row.getAttribute('data-room-type'));
+            bar.querySelector('.op-reserve').setAttribute('href', url);
+            bar.hidden = false;
+        }
+        function pick(cell) {
+            var row = cell.closest('.op-row');
+            if (sel && sel.row === row) {
+                var list = cells(row);
+                var a = list.indexOf(sel.start), b = list.indexOf(cell);
+                if (b >= a) {
+                    for (var i = a; i <= b; i++) {
+                        if (!list[i].classList.contains('op-free')) {
+                            sel = {row: row, start: cell, end: cell}; // range crosses a booking: start over
+                            paint();
+                            return;
+                        }
+                    }
+                    sel.end = cell;
+                    paint();
+                    return;
+                }
+            }
+            sel = {row: row, start: cell, end: cell};
+            paint();
+        }
+
+        root.addEventListener('click', function (e) {
+            var cell = e.target.closest('.op-free');
+            if (cell && root.contains(cell)) {
+                pick(cell);
+            }
+        });
+        root.addEventListener('keydown', function (e) {
+            var cell = e.target.closest && e.target.closest('.op-free');
+            if (cell && (e.key === 'Enter' || e.key === ' ')) {
+                e.preventDefault();
+                pick(cell);
+            }
+        });
+        document.addEventListener('keydown', function (e) {
+            if (e.key === 'Escape' && sel) {
+                clear();
+            }
+        });
+        bar.querySelector('.op-cancel').addEventListener('click', clear);
+    }
+
+    if (document.readyState === 'loading') {
+        document.addEventListener('DOMContentLoaded', init);
+    } else {
+        init();
+    }
+})();