Implement Phase 7: Contact Form 7 Integration (v0.7.0)

Add custom CF7 form tags for booking requests:
- [bnb_building_select] - Building filter dropdown
- [bnb_room_select] - Room selection with capacity data
- [bnb_date_checkin/checkout] - Date pickers with validation
- [bnb_guests] - Guest count with capacity limits

Features:
- Server-side validation for all fields
- Real-time AJAX availability checking
- Automatic price calculation display
- Booking creation on form submission
- Guest record creation/linking
- Custom mail tags for CF7 templates

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,51 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.7.0] - 2026-02-03
+
+### Added
+
+- Contact Form 7 Integration:
+  - New `src/Integration/CF7.php` class for CF7 integration
+  - Custom form tags: `[bnb_building_select]`, `[bnb_room_select]`, `[bnb_date_checkin]`, `[bnb_date_checkout]`, `[bnb_guests]`
+  - Server-side validation for all custom tags
+  - Availability checking before form submission
+  - Automatic booking creation on form submission with 'pending' status
+  - Guest record creation/linking using existing `find_or_create_guest` pattern
+  - Price calculation using existing Calculator class
+  - Email notifications via existing EmailNotifier
+- CF7 Frontend Assets:
+  - `assets/js/cf7-integration.js` for dynamic form behavior
+  - Building-based room filtering
+  - Date linking (checkout min = checkin + 1)
+  - Capacity validation against selected room
+  - AJAX availability checking with status display
+  - Dynamic price calculation display
+  - `assets/css/cf7-integration.css` for form styling
+  - Availability status indicators (checking/available/unavailable)
+  - Price display formatting
+  - Capacity warning styling
+  - Responsive design with dark mode support
+- Custom CF7 Mail Tags:
+  - `[_bnb_booking_reference]` - Generated booking reference
+  - `[_bnb_booking_id]` - Booking post ID
+  - `[_bnb_room_name]` - Selected room title
+  - `[_bnb_calculated_price]` - Formatted price
+  - `[_bnb_nights]` - Number of nights
+- Form Type Detection:
+  - Auto-detects booking forms by presence of `[bnb_room_select]`, `[bnb_date_checkin]`, `[bnb_date_checkout]`
+  - CSS class `wp-bnb-booking-form` for explicit form type declaration
+  - Inquiry forms use default CF7 email handling without booking creation
+
+### Changed
+
+- Plugin.php updated to conditionally initialize CF7 integration when CF7 is active
+- Frontend assets now include CF7-specific CSS and JavaScript when CF7 is detected
+
+### Dependencies
+
+- Contact Form 7 plugin required for CF7 integration features (optional)
+
 ## [0.6.1] - 2026-02-03
 
 ### Added

PLAN.md

@@ -149,20 +149,20 @@ This document outlines the implementation plan for the WP BnB Management plugin.
 - [x] Building rooms widget
 - [x] Availability calendar widget
 
-## Phase 7: Contact Form 7 Integration (v0.7.0)
+## Phase 7: Contact Form 7 Integration (v0.7.0) - Complete
 
 ### Booking Request Form
 
-- [ ] Custom CF7 tags for rooms/dates
+- [x] Custom CF7 tags for rooms/dates
-- [ ] Form validation
+- [x] Form validation
-- [ ] Booking creation on submission
+- [x] Booking creation on submission
-- [ ] Email notifications
+- [x] Email notifications
 
 ### Inquiry Form
 
-- [ ] General inquiry handling
+- [x] General inquiry handling
-- [ ] Room-specific inquiries
+- [x] Room-specific inquiries
-- [ ] Auto-response templates
+- [x] Auto-response templates (uses default CF7 mail templates)
 
 ## Phase 8: Dashboard & Reports (v0.8.0)
 
@@ -306,7 +306,7 @@ The plugin will provide extensive hooks for customization:
 | 0.4.0   | Guests             | Complete |
 | 0.5.0   | Services           | Complete |
 | 0.6.0   | Frontend           | Complete |
-| 0.7.0   | CF7 Integration    | TBD      |
+| 0.7.0   | CF7 Integration    | Complete |
 | 0.8.0   | Dashboard          | TBD      |
 | 0.9.0   | Prometheus Metrics | TBD      |
 | 0.10.0  | Security Audit     | TBD      |

README.md

@@ -18,13 +18,14 @@ WP BnB Management enables WordPress to act as a full management system for B&B h
 - **Frontend Integration**: Gutenberg blocks, widgets, and shortcodes
 - **Auto-Updates**: Automatic update checks and installation from license server
 - **Development Mode**: License bypass for local development environments
-- **Contact Form 7 Integration**: Accept booking requests through forms (planned)
+- **Contact Form 7 Integration**: Accept booking requests and inquiries through CF7 forms
 
 ### Requirements
 
 - WordPress 6.0 or higher
 - PHP 8.3 or higher
 - Valid license key
+- Contact Form 7 (optional, for booking forms)
 
 ## Installation
 
@@ -143,6 +144,152 @@ Available sidebar widgets:
 - **Building Rooms** - List all rooms in a building
 - **Availability Calendar** - Mini calendar showing booking status
 
+## Contact Form 7 Integration
+
+The plugin integrates with Contact Form 7 to accept booking requests and inquiries. Custom form tags are provided for room selection, date pickers, and guest counts.
+
+### Custom Form Tags
+
+Use these tags in your CF7 forms:
+
+- `[bnb_building_select name]` - Building dropdown (optional filter for rooms)
+- `[bnb_room_select* name]` - Room dropdown with capacity data
+- `[bnb_date_checkin* name]` - Check-in date picker
+- `[bnb_date_checkout* name]` - Check-out date picker
+- `[bnb_guests* name]` - Guest count input
+
+### Tag Options
+
+**`[bnb_building_select]`**:
+
+- `first_as_label:"text"` - Placeholder text (default: "All Locations")
+
+**`[bnb_room_select]`**:
+
+- `building_field:"name"` - Link to building field for filtering
+- `first_as_label:"text"` - Placeholder text (default: "Select Room")
+
+**`[bnb_guests]`**:
+
+- `min:N` - Minimum guests (default: 1)
+- `max:N` - Maximum guests (default: 10)
+- `default:N` - Default value (default: 1)
+
+### Example Booking Form
+
+```txt
+<div class="wp-bnb-booking-form">
+<h3>Book Your Stay</h3>
+
+<div class="wp-bnb-form-row">
+[bnb_building_select building first_as_label:"All Locations"]
+</div>
+
+<div class="wp-bnb-form-row">
+[bnb_room_select* room building_field:"building" first_as_label:"Select a Room"]
+</div>
+
+<div class="wp-bnb-form-row-2col">
+<div class="wp-bnb-form-field">
+<label>Check-in</label>
+[bnb_date_checkin* check_in]
+</div>
+<div class="wp-bnb-form-field">
+<label>Check-out</label>
+[bnb_date_checkout* check_out]
+</div>
+</div>
+
+<div class="wp-bnb-availability-status"></div>
+
+<div class="wp-bnb-form-row">
+<label>Number of Guests</label>
+[bnb_guests* guests min:1 max:10 default:2]
+</div>
+
+<div class="wp-bnb-price-display"></div>
+
+<h4>Your Information</h4>
+
+<div class="wp-bnb-form-row-2col">
+<div class="wp-bnb-form-field">
+<label>First Name</label>
+[text* first_name]
+</div>
+<div class="wp-bnb-form-field">
+<label>Last Name</label>
+[text* last_name]
+</div>
+</div>
+
+<div class="wp-bnb-form-row">
+<label>Email</label>
+[email* your_email]
+</div>
+
+<div class="wp-bnb-form-row">
+<label>Phone</label>
+[tel your_phone]
+</div>
+
+<div class="wp-bnb-form-row">
+<label>Message</label>
+[textarea your_message]
+</div>
+
+[submit "Request Booking"]
+</div>
+```
+
+### Example Inquiry Form
+
+For room-specific inquiries, add the `wp-bnb-inquiry-form` class:
+
+```txt
+<div class="wp-bnb-inquiry-form">
+<h3>Inquire About This Room</h3>
+
+[hidden room default:123]
+
+<div class="wp-bnb-form-row">
+<label>Your Name</label>
+[text* your_name]
+</div>
+
+<div class="wp-bnb-form-row">
+<label>Email</label>
+[email* your_email]
+</div>
+
+<div class="wp-bnb-form-row">
+<label>Your Question</label>
+[textarea* your_message]
+</div>
+
+[submit "Send Inquiry"]
+</div>
+```
+
+### Form Features
+
+- **Availability Checking**: Real-time AJAX validation shows room availability
+- **Price Display**: Estimated total calculated and displayed automatically
+- **Room Filtering**: Rooms filter by building selection
+- **Date Validation**: Check-out must be after check-in, no past dates
+- **Capacity Validation**: Guest count validated against room capacity
+- **Automatic Booking**: Booking record created with "pending" status on submission
+- **Guest Linking**: Guest records created or linked by email address
+
+### Custom Mail Tags
+
+Use these in your CF7 mail templates:
+
+- `[_bnb_room_name]` - Room title
+- `[_bnb_building_name]` - Building name
+- `[_bnb_calculated_price]` - Formatted price
+- `[_bnb_nights]` - Number of nights
+- `[_bnb_booking_reference]` - Booking reference (after creation)
+
 ## Hooks and Filters
 
 Developers can customize behavior using these hooks:

assets/css/cf7-integration.css

@@ -0,0 +1,344 @@
+/**
+ * WP BnB Contact Form 7 Integration Styles
+ *
+ * Styling for CF7 booking forms.
+ *
+ * @package Magdev\WpBnb
+ */
+
+/* Custom Properties */
+:root {
+	--wp-bnb-cf7-primary: #2271b1;
+	--wp-bnb-cf7-success: #00a32a;
+	--wp-bnb-cf7-warning: #dba617;
+	--wp-bnb-cf7-error: #d63638;
+	--wp-bnb-cf7-text: #1d2327;
+	--wp-bnb-cf7-text-light: #646970;
+	--wp-bnb-cf7-border: #c3c4c7;
+	--wp-bnb-cf7-bg: #f0f0f1;
+	--wp-bnb-cf7-radius: 4px;
+	--wp-bnb-cf7-spacing: 1rem;
+}
+
+/* Form Layout */
+.wp-bnb-booking-form,
+.wp-bnb-inquiry-form {
+	max-width: 700px;
+	margin: 0 auto;
+}
+
+.wp-bnb-booking-form h3,
+.wp-bnb-booking-form h4,
+.wp-bnb-inquiry-form h3,
+.wp-bnb-inquiry-form h4 {
+	margin-top: 1.5em;
+	margin-bottom: 0.75em;
+	padding-bottom: 0.5em;
+	border-bottom: 1px solid var(--wp-bnb-cf7-border);
+}
+
+.wp-bnb-booking-form h3:first-child,
+.wp-bnb-inquiry-form h3:first-child {
+	margin-top: 0;
+}
+
+/* Form Rows */
+.wp-bnb-form-row {
+	margin-bottom: var(--wp-bnb-cf7-spacing);
+}
+
+.wp-bnb-form-row-2col {
+	display: grid;
+	grid-template-columns: 1fr 1fr;
+	gap: var(--wp-bnb-cf7-spacing);
+}
+
+@media (max-width: 480px) {
+	.wp-bnb-form-row-2col {
+		grid-template-columns: 1fr;
+	}
+}
+
+/* Form Fields */
+.wp-bnb-form-field {
+	display: flex;
+	flex-direction: column;
+}
+
+.wp-bnb-form-field label {
+	display: block;
+	margin-bottom: 0.25rem;
+	font-weight: 600;
+	font-size: 0.875rem;
+	color: var(--wp-bnb-cf7-text);
+}
+
+/* Custom CF7 Tags Styling */
+.wp-bnb-building-select,
+.wp-bnb-room-select,
+.wp-bnb-date-checkin,
+.wp-bnb-date-checkout,
+.wp-bnb-guests {
+	width: 100%;
+	padding: 0.5rem 0.75rem;
+	font-size: 1rem;
+	line-height: 1.5;
+	border: 1px solid var(--wp-bnb-cf7-border);
+	border-radius: var(--wp-bnb-cf7-radius);
+	background-color: #fff;
+	transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
+}
+
+.wp-bnb-building-select:focus,
+.wp-bnb-room-select:focus,
+.wp-bnb-date-checkin:focus,
+.wp-bnb-date-checkout:focus,
+.wp-bnb-guests:focus {
+	outline: none;
+	border-color: var(--wp-bnb-cf7-primary);
+	box-shadow: 0 0 0 2px rgba(34, 113, 177, 0.25);
+}
+
+/* Select dropdown */
+.wp-bnb-room-select optgroup {
+	font-weight: 600;
+	font-style: normal;
+	color: var(--wp-bnb-cf7-text);
+}
+
+/* Date inputs */
+.wp-bnb-date-checkin,
+.wp-bnb-date-checkout {
+	cursor: pointer;
+}
+
+/* Number input */
+.wp-bnb-guests {
+	max-width: 120px;
+}
+
+/* Availability Status */
+.wp-bnb-availability-status {
+	padding: var(--wp-bnb-cf7-spacing);
+	margin: var(--wp-bnb-cf7-spacing) 0;
+	background-color: var(--wp-bnb-cf7-bg);
+	border-radius: var(--wp-bnb-cf7-radius);
+	text-align: center;
+	min-height: 50px;
+	display: flex;
+	align-items: center;
+	justify-content: center;
+}
+
+.wp-bnb-availability-status:empty {
+	display: none;
+}
+
+.wp-bnb-checking {
+	color: var(--wp-bnb-cf7-text-light);
+	font-style: italic;
+}
+
+.wp-bnb-checking::before {
+	content: "";
+	display: inline-block;
+	width: 16px;
+	height: 16px;
+	margin-right: 8px;
+	border: 2px solid var(--wp-bnb-cf7-border);
+	border-top-color: var(--wp-bnb-cf7-primary);
+	border-radius: 50%;
+	animation: wp-bnb-spin 0.8s linear infinite;
+	vertical-align: middle;
+}
+
+@keyframes wp-bnb-spin {
+	to {
+		transform: rotate(360deg);
+	}
+}
+
+.wp-bnb-available {
+	color: var(--wp-bnb-cf7-success);
+	font-weight: 600;
+}
+
+.wp-bnb-available::before {
+	content: "\2713";
+	display: inline-block;
+	margin-right: 8px;
+	font-size: 1.25em;
+}
+
+.wp-bnb-unavailable {
+	color: var(--wp-bnb-cf7-error);
+	font-weight: 600;
+}
+
+.wp-bnb-unavailable::before {
+	content: "\2717";
+	display: inline-block;
+	margin-right: 8px;
+	font-size: 1.25em;
+}
+
+/* Price Display */
+.wp-bnb-price-display {
+	padding: var(--wp-bnb-cf7-spacing);
+	margin: var(--wp-bnb-cf7-spacing) 0;
+	background-color: #e7f5ea;
+	border: 1px solid var(--wp-bnb-cf7-success);
+	border-radius: var(--wp-bnb-cf7-radius);
+	text-align: center;
+}
+
+.wp-bnb-price-display:empty {
+	display: none;
+}
+
+.wp-bnb-price-label {
+	color: var(--wp-bnb-cf7-text-light);
+	font-size: 0.875rem;
+}
+
+.wp-bnb-price-amount {
+	font-size: 1.5rem;
+	font-weight: 700;
+	color: var(--wp-bnb-cf7-success);
+	margin: 0 0.5rem;
+}
+
+.wp-bnb-nights {
+	color: var(--wp-bnb-cf7-text-light);
+	font-size: 0.875rem;
+}
+
+/* Capacity Warning */
+.wp-bnb-capacity-warning {
+	display: block;
+	margin-top: 0.25rem;
+	padding: 0.25rem 0.5rem;
+	font-size: 0.8125rem;
+	color: var(--wp-bnb-cf7-error);
+	background-color: #fcf0f1;
+	border-radius: var(--wp-bnb-cf7-radius);
+}
+
+/* Validation Errors */
+.wpcf7-form-control-wrap .wpcf7-not-valid-tip {
+	color: var(--wp-bnb-cf7-error);
+	font-size: 0.8125rem;
+	margin-top: 0.25rem;
+}
+
+.wpcf7-form-control.wpcf7-not-valid {
+	border-color: var(--wp-bnb-cf7-error);
+}
+
+/* Response Messages */
+.wpcf7 form.sent .wpcf7-response-output {
+	border-color: var(--wp-bnb-cf7-success);
+	background-color: #e7f5ea;
+	color: var(--wp-bnb-cf7-success);
+}
+
+.wpcf7 form.failed .wpcf7-response-output,
+.wpcf7 form.aborted .wpcf7-response-output,
+.wpcf7 form.spam .wpcf7-response-output,
+.wpcf7 form.invalid .wpcf7-response-output {
+	border-color: var(--wp-bnb-cf7-error);
+	background-color: #fcf0f1;
+	color: var(--wp-bnb-cf7-error);
+}
+
+/* Submit Button */
+.wp-bnb-booking-form .wpcf7-submit,
+.wp-bnb-inquiry-form .wpcf7-submit {
+	display: inline-block;
+	padding: 0.75rem 1.5rem;
+	font-size: 1rem;
+	font-weight: 600;
+	color: #fff;
+	background-color: var(--wp-bnb-cf7-primary);
+	border: none;
+	border-radius: var(--wp-bnb-cf7-radius);
+	cursor: pointer;
+	transition: background-color 0.15s ease-in-out;
+}
+
+.wp-bnb-booking-form .wpcf7-submit:hover,
+.wp-bnb-inquiry-form .wpcf7-submit:hover {
+	background-color: #135e96;
+}
+
+.wp-bnb-booking-form .wpcf7-submit:disabled,
+.wp-bnb-inquiry-form .wpcf7-submit:disabled {
+	opacity: 0.7;
+	cursor: not-allowed;
+}
+
+/* Spinner */
+.wpcf7 .wpcf7-spinner {
+	margin-left: 0.5rem;
+}
+
+/* Hidden Room Field (for inquiry forms) */
+.wp-bnb-inquiry-form input[type="hidden"] + .wpcf7-form-control-wrap {
+	display: none;
+}
+
+/* Form Section Headers */
+.wp-bnb-booking-form hr,
+.wp-bnb-inquiry-form hr {
+	margin: 1.5rem 0;
+	border: none;
+	border-top: 1px solid var(--wp-bnb-cf7-border);
+}
+
+/* Dark Mode Support */
+@media (prefers-color-scheme: dark) {
+	:root {
+		--wp-bnb-cf7-text: #f0f0f1;
+		--wp-bnb-cf7-text-light: #a7aaad;
+		--wp-bnb-cf7-border: #50575e;
+		--wp-bnb-cf7-bg: #2c3338;
+	}
+
+	.wp-bnb-building-select,
+	.wp-bnb-room-select,
+	.wp-bnb-date-checkin,
+	.wp-bnb-date-checkout,
+	.wp-bnb-guests {
+		background-color: #3c434a;
+		color: var(--wp-bnb-cf7-text);
+	}
+
+	.wp-bnb-price-display {
+		background-color: #1a3320;
+		border-color: var(--wp-bnb-cf7-success);
+	}
+
+	.wp-bnb-capacity-warning {
+		background-color: #3c1618;
+	}
+
+	.wpcf7 form.sent .wpcf7-response-output {
+		background-color: #1a3320;
+	}
+
+	.wpcf7 form.failed .wpcf7-response-output,
+	.wpcf7 form.aborted .wpcf7-response-output,
+	.wpcf7 form.spam .wpcf7-response-output,
+	.wpcf7 form.invalid .wpcf7-response-output {
+		background-color: #3c1618;
+	}
+}
+
+/* Print Styles */
+@media print {
+	.wp-bnb-availability-status,
+	.wp-bnb-price-display,
+	.wpcf7-submit {
+		display: none;
+	}
+}

assets/js/cf7-integration.js

@@ -0,0 +1,375 @@
+/**
+ * WP BnB Contact Form 7 Integration
+ *
+ * Handles dynamic form behavior for booking forms.
+ *
+ * @package Magdev\WpBnb
+ */
+(function() {
+	'use strict';
+
+	const WpBnbCF7 = {
+		config: window.wpBnbCF7 || {},
+
+		/**
+		 * Initialize all CF7 integration features.
+		 */
+		init: function() {
+			this.initBuildingRoomFilter();
+			this.initDateValidation();
+			this.initCapacityValidation();
+			this.initAvailabilityCheck();
+			this.initPriceDisplay();
+		},
+
+		/**
+		 * Filter rooms dropdown when building is selected.
+		 */
+		initBuildingRoomFilter: function() {
+			document.querySelectorAll('[data-bnb-building-select]').forEach(function(buildingSelect) {
+				const form = buildingSelect.closest('form');
+				const roomSelect = form ? form.querySelector('[data-bnb-room-select]') : null;
+
+				if (!roomSelect) return;
+
+				// Store all options for filtering
+				const allOptions = Array.from(roomSelect.querySelectorAll('option, optgroup'));
+				const originalHTML = roomSelect.innerHTML;
+
+				buildingSelect.addEventListener('change', function() {
+					const selectedBuilding = buildingSelect.value;
+
+					// Show all options if no building selected
+					if (!selectedBuilding) {
+						roomSelect.innerHTML = originalHTML;
+						roomSelect.dispatchEvent(new Event('change'));
+						return;
+					}
+
+					// Filter options by building
+					roomSelect.innerHTML = '';
+
+					// Add placeholder option
+					const placeholder = document.createElement('option');
+					placeholder.value = '';
+					placeholder.textContent = WpBnbCF7.config.i18n?.selectRoom || '-- Select Room --';
+					roomSelect.appendChild(placeholder);
+
+					allOptions.forEach(function(el) {
+						if (el.tagName === 'OPTGROUP') {
+							// Check if any options in this optgroup match
+							const matchingOptions = Array.from(el.querySelectorAll('option')).filter(function(opt) {
+								return opt.dataset.building === selectedBuilding;
+							});
+
+							if (matchingOptions.length > 0) {
+								const clonedGroup = el.cloneNode(false);
+								matchingOptions.forEach(function(opt) {
+									clonedGroup.appendChild(opt.cloneNode(true));
+								});
+								roomSelect.appendChild(clonedGroup);
+							}
+						}
+					});
+
+					// Trigger change to update dependent fields
+					roomSelect.dispatchEvent(new Event('change'));
+				});
+			});
+		},
+
+		/**
+		 * Validate and link check-in/check-out dates.
+		 */
+		initDateValidation: function() {
+			document.querySelectorAll('[data-bnb-checkin]').forEach(function(checkinInput) {
+				const form = checkinInput.closest('form');
+				const checkoutInput = form ? form.querySelector('[data-bnb-checkout]') : null;
+
+				if (!checkoutInput) return;
+
+				// Set minimum check-in to today
+				const today = WpBnbCF7.formatDate(new Date());
+				if (!checkinInput.getAttribute('min') || checkinInput.getAttribute('min') < today) {
+					checkinInput.setAttribute('min', today);
+				}
+
+				checkinInput.addEventListener('change', function() {
+					if (checkinInput.value) {
+						// Set checkout minimum to checkin + 1 day
+						const minCheckout = new Date(checkinInput.value);
+						minCheckout.setDate(minCheckout.getDate() + 1);
+						checkoutInput.setAttribute('min', WpBnbCF7.formatDate(minCheckout));
+
+						// Clear checkout if it's now invalid
+						if (checkoutInput.value && checkoutInput.value <= checkinInput.value) {
+							checkoutInput.value = '';
+						}
+
+						// Trigger availability check
+						WpBnbCF7.triggerAvailabilityCheck(form);
+					}
+				});
+
+				checkoutInput.addEventListener('change', function() {
+					if (checkoutInput.value && checkinInput.value) {
+						if (checkoutInput.value <= checkinInput.value) {
+							alert(WpBnbCF7.config.i18n?.invalidDateRange || 'Check-out must be after check-in');
+							checkoutInput.value = '';
+							return;
+						}
+
+						// Trigger availability check
+						WpBnbCF7.triggerAvailabilityCheck(form);
+					}
+				});
+			});
+		},
+
+		/**
+		 * Validate guest count against room capacity.
+		 */
+		initCapacityValidation: function() {
+			document.querySelectorAll('[data-bnb-guests]').forEach(function(guestsInput) {
+				const form = guestsInput.closest('form');
+				const roomSelect = form ? form.querySelector('[data-bnb-room-select]') : null;
+
+				if (!roomSelect) return;
+
+				const validateCapacity = function() {
+					const selectedOption = roomSelect.selectedOptions[0];
+					const capacity = parseInt(selectedOption?.dataset.capacity || 99, 10);
+					const guests = parseInt(guestsInput.value || 0, 10);
+
+					// Update max attribute
+					guestsInput.setAttribute('max', capacity);
+
+					// Show warning if over capacity
+					const wrapper = guestsInput.closest('.wpcf7-form-control-wrap');
+					let warning = wrapper ? wrapper.querySelector('.wp-bnb-capacity-warning') : null;
+
+					if (guests > capacity) {
+						if (!warning && wrapper) {
+							warning = document.createElement('span');
+							warning.className = 'wp-bnb-capacity-warning';
+							wrapper.appendChild(warning);
+						}
+						if (warning) {
+							warning.textContent = (WpBnbCF7.config.i18n?.capacityExceeded || 'Maximum %d guests for this room').replace('%d', capacity);
+						}
+					} else if (warning) {
+						warning.remove();
+					}
+				};
+
+				roomSelect.addEventListener('change', validateCapacity);
+				guestsInput.addEventListener('change', validateCapacity);
+				guestsInput.addEventListener('input', validateCapacity);
+			});
+		},
+
+		/**
+		 * Initialize AJAX availability checking.
+		 */
+		initAvailabilityCheck: function() {
+			// Find forms with availability display
+			document.querySelectorAll('.wp-bnb-availability-status').forEach(function(statusEl) {
+				const form = statusEl.closest('form');
+				if (form) {
+					form._availabilityStatus = statusEl;
+				}
+			});
+		},
+
+		/**
+		 * Trigger availability check for a form.
+		 *
+		 * @param {HTMLFormElement} form Form element.
+		 */
+		triggerAvailabilityCheck: function(form) {
+			const roomSelect = form.querySelector('[data-bnb-room-select]');
+			const checkinInput = form.querySelector('[data-bnb-checkin]');
+			const checkoutInput = form.querySelector('[data-bnb-checkout]');
+			const statusEl = form._availabilityStatus || form.querySelector('.wp-bnb-availability-status');
+			const priceEl = form.querySelector('.wp-bnb-price-display');
+
+			if (!roomSelect || !checkinInput || !checkoutInput) return;
+
+			const roomId = roomSelect.value;
+			const checkIn = checkinInput.value;
+			const checkOut = checkoutInput.value;
+
+			if (!roomId || !checkIn || !checkOut) {
+				if (statusEl) statusEl.innerHTML = '';
+				if (priceEl) priceEl.innerHTML = '';
+				return;
+			}
+
+			// Show loading state
+			if (statusEl) {
+				statusEl.innerHTML = '<span class="wp-bnb-checking">' + (WpBnbCF7.config.i18n?.checking || 'Checking availability...') + '</span>';
+			}
+
+			// Make AJAX request
+			WpBnbCF7.ajax('wp_bnb_get_availability', {
+				room_id: roomId,
+				check_in: checkIn,
+				check_out: checkOut
+			})
+			.then(function(response) {
+				if (statusEl) {
+					if (response.available) {
+						let html = '<span class="wp-bnb-available">' + (WpBnbCF7.config.i18n?.available || 'Room is available!') + '</span>';
+						statusEl.innerHTML = html;
+					} else {
+						statusEl.innerHTML = '<span class="wp-bnb-unavailable">' + (WpBnbCF7.config.i18n?.unavailable || 'Room is not available for these dates') + '</span>';
+					}
+				}
+
+				// Update price display
+				if (priceEl && response.available && response.price_formatted) {
+					priceEl.innerHTML = '<span class="wp-bnb-price-label">' + (WpBnbCF7.config.i18n?.estimatedTotal || 'Estimated Total') + ':</span> ' +
+						'<span class="wp-bnb-price-amount">' + response.price_formatted + '</span> ' +
+						'<span class="wp-bnb-nights">(' + response.nights + ' ' + (WpBnbCF7.config.i18n?.nights || 'nights') + ')</span>';
+				} else if (priceEl) {
+					priceEl.innerHTML = '';
+				}
+			})
+			.catch(function(error) {
+				console.error('Availability check failed:', error);
+				if (statusEl) {
+					statusEl.innerHTML = '';
+				}
+			});
+		},
+
+		/**
+		 * Initialize price display updates.
+		 */
+		initPriceDisplay: function() {
+			const self = this;
+
+			document.querySelectorAll('.wp-bnb-price-display').forEach(function(priceEl) {
+				const form = priceEl.closest('form');
+				if (!form) return;
+
+				const updatePrice = self.debounce(function() {
+					const roomSelect = form.querySelector('[data-bnb-room-select]');
+					const checkinInput = form.querySelector('[data-bnb-checkin]');
+					const checkoutInput = form.querySelector('[data-bnb-checkout]');
+
+					if (!roomSelect?.value || !checkinInput?.value || !checkoutInput?.value) {
+						priceEl.innerHTML = '';
+						return;
+					}
+
+					self.ajax('wp_bnb_calculate_price', {
+						room_id: roomSelect.value,
+						check_in: checkinInput.value,
+						check_out: checkoutInput.value
+					})
+					.then(function(response) {
+						priceEl.innerHTML = '<span class="wp-bnb-price-label">' + (self.config.i18n?.estimatedTotal || 'Estimated Total') + ':</span> ' +
+							'<span class="wp-bnb-price-amount">' + response.price_formatted + '</span> ' +
+							'<span class="wp-bnb-nights">(' + response.nights + ' ' + (self.config.i18n?.nights || 'nights') + ')</span>';
+					})
+					.catch(function() {
+						priceEl.innerHTML = '';
+					});
+				}, 500);
+
+				// Bind to relevant field changes
+				form.querySelectorAll('[data-bnb-room-select], [data-bnb-checkin], [data-bnb-checkout]')
+					.forEach(function(input) {
+						input.addEventListener('change', updatePrice);
+					});
+			});
+		},
+
+		/**
+		 * Make AJAX request.
+		 *
+		 * @param {string} action AJAX action name.
+		 * @param {object} data   Request data.
+		 * @return {Promise}
+		 */
+		ajax: function(action, data) {
+			data = data || {};
+			const formData = new FormData();
+			formData.append('action', action);
+			formData.append('nonce', this.config.nonce || '');
+
+			Object.keys(data).forEach(function(key) {
+				if (data[key] !== null && data[key] !== undefined) {
+					formData.append(key, data[key]);
+				}
+			});
+
+			return fetch(this.config.ajaxUrl || '/wp-admin/admin-ajax.php', {
+				method: 'POST',
+				body: formData,
+				credentials: 'same-origin'
+			})
+			.then(function(response) {
+				return response.json();
+			})
+			.then(function(responseData) {
+				if (!responseData.success) {
+					throw new Error(responseData.data?.message || 'Request failed');
+				}
+				return responseData.data;
+			});
+		},
+
+		/**
+		 * Format date as YYYY-MM-DD.
+		 *
+		 * @param {Date} date Date object.
+		 * @return {string}
+		 */
+		formatDate: function(date) {
+			const year = date.getFullYear();
+			const month = String(date.getMonth() + 1).padStart(2, '0');
+			const day = String(date.getDate()).padStart(2, '0');
+			return year + '-' + month + '-' + day;
+		},
+
+		/**
+		 * Debounce function.
+		 *
+		 * @param {function} func Function to debounce.
+		 * @param {number}   wait Milliseconds to wait.
+		 * @return {function}
+		 */
+		debounce: function(func, wait) {
+			let timeout;
+			return function() {
+				const context = this;
+				const args = arguments;
+				clearTimeout(timeout);
+				timeout = setTimeout(function() {
+					func.apply(context, args);
+				}, wait);
+			};
+		}
+	};
+
+	// Initialize on DOM ready
+	if (document.readyState === 'loading') {
+		document.addEventListener('DOMContentLoaded', function() {
+			WpBnbCF7.init();
+		});
+	} else {
+		WpBnbCF7.init();
+	}
+
+	// Re-initialize on CF7 form reset
+	document.addEventListener('wpcf7reset', function(event) {
+		setTimeout(function() {
+			WpBnbCF7.init();
+		}, 100);
+	});
+
+	// Export to window for external access
+	window.WpBnbCF7 = WpBnbCF7;
+})();

src/Plugin.php

@@ -16,6 +16,7 @@ use Magdev\WpBnb\Booking\Availability;
 use Magdev\WpBnb\Booking\EmailNotifier;
 use Magdev\WpBnb\Frontend\Search;
 use Magdev\WpBnb\Frontend\Shortcodes;
+use Magdev\WpBnb\Integration\CF7;
 use Magdev\WpBnb\Frontend\Widgets\AvailabilityCalendar;
 use Magdev\WpBnb\Frontend\Widgets\BuildingRooms;
 use Magdev\WpBnb\Frontend\Widgets\SimilarRooms;
@@ -202,6 +203,11 @@ final class Plugin {
 
 		// Register widgets.
 		add_action( 'widgets_init', array( $this, 'register_widgets' ) );
+
+		// Initialize Contact Form 7 integration if CF7 is active.
+		if ( class_exists( 'WPCF7' ) ) {
+			CF7::init();
+		}
 	}
 
 	/**
@@ -362,6 +368,43 @@ final class Plugin {
 				),
 			)
 		);
+
+		// Load CF7 integration assets if CF7 is active.
+		if ( class_exists( 'WPCF7' ) ) {
+			wp_enqueue_style(
+				'wp-bnb-cf7',
+				WP_BNB_URL . 'assets/css/cf7-integration.css',
+				array( 'contact-form-7' ),
+				WP_BNB_VERSION
+			);
+
+			wp_enqueue_script(
+				'wp-bnb-cf7',
+				WP_BNB_URL . 'assets/js/cf7-integration.js',
+				array( 'contact-form-7' ),
+				WP_BNB_VERSION,
+				true
+			);
+
+			wp_localize_script(
+				'wp-bnb-cf7',
+				'wpBnbCF7',
+				array(
+					'ajaxUrl' => admin_url( 'admin-ajax.php' ),
+					'nonce'   => wp_create_nonce( 'wp_bnb_frontend_nonce' ),
+					'i18n'    => array(
+						'selectRoom'       => __( '-- Select Room --', 'wp-bnb' ),
+						'checking'         => __( 'Checking availability...', 'wp-bnb' ),
+						'available'        => __( 'Room is available!', 'wp-bnb' ),
+						'unavailable'      => __( 'Room is not available for these dates', 'wp-bnb' ),
+						'invalidDateRange' => __( 'Check-out must be after check-in', 'wp-bnb' ),
+						'capacityExceeded' => __( 'Maximum %d guests for this room', 'wp-bnb' ),
+						'estimatedTotal'   => __( 'Estimated Total', 'wp-bnb' ),
+						'nights'           => __( 'nights', 'wp-bnb' ),
+					),
+				)
+			);
+		}
 	}
 
 	/**

wp-bnb.php

@@ -3,7 +3,7 @@
  * Plugin Name: WP BnB Management
  * Plugin URI: https://src.bundespruefstelle.ch/magdev/wp-bnb
  * Description: A comprehensive Bed & Breakfast management system for WordPress. Manage buildings, rooms, bookings, and guests.
- * Version: 0.6.1
+ * Version: 0.7.0
  * Requires at least: 6.0
  * Requires PHP: 8.3
  * Author: Marco Graetsch
@@ -24,7 +24,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 }
 
 // Plugin version constant - MUST match Version in header above.
-define( 'WP_BNB_VERSION', '0.6.1' );
+define( 'WP_BNB_VERSION', '0.7.0' );
 
 // Plugin path constants.
 define( 'WP_BNB_PATH', plugin_dir_path( __FILE__ ) );