unavailable dates

routes.py

@@ -144,19 +144,35 @@ def create_listing():
 def booking(listing_id):
     listing = Listing.query.get_or_404(listing_id)
     booked_dates = Booking.query.filter_by(listing_id=listing_id).all()
-    unavailable_dates = [
+    unavailable_dates = [(booking.check_in.strftime('%Y-%m-%d'), booking.check_out.strftime('%Y-%m-%d')) for booking in booked_dates]
-        (booking.check_in.strftime('%Y-%m-%d'), booking.check_out.strftime('%Y-%m-%d'))
-        for booking in booked_dates
-    ]
 
     if request.method == 'POST':
         check_in = datetime.strptime(request.form['check_in'], '%Y-%m-%d')
         check_out = datetime.strptime(request.form['check_out'], '%Y-%m-%d')
-        guests = request.form['guests']
+
+        for start_date, end_date in unavailable_dates:
+            if (check_in.strftime('%Y-%m-%d') >= start_date and check_in.strftime('%Y-%m-%d') <= end_date) or \
+               (check_out.strftime('%Y-%m-%d') >= start_date and check_out.strftime('%Y-%m-%d') <= end_date):
+                return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates, error="Selected dates are not available.")
+        try:
+            check_in = datetime.strptime(request.form['check_in'], '%Y-%m-%d')
+            check_out = datetime.strptime(request.form['check_out'], '%Y-%m-%d')
+
+            if check_out <= check_in:
+                return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates, error="Check-out date must be after check-in date.")
+
+            guests = int(request.form['guests'])
+            if guests > listing.guests:
+                return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates, error="Number of guests exceeds maximum allowed.")
+
             booking = Booking(user_id=current_user.id, listing_id=listing_id, check_in=check_in, check_out=check_out, guests=guests)
             db.session.add(booking)
             db.session.commit()
             return redirect(url_for('home'))
+
+        except ValueError:
+            return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates, error="Invalid date format.")
+
     return render_template('booking.html', listing=listing, unavailable_dates=unavailable_dates)
 
 @app.route('/view/<int:listing_id>', methods=['GET'])

templates/booking.html

@@ -5,10 +5,14 @@
 <div class="row justify-content-center">
     <div class="col-md-6">
         <h1 class="text-center">Book {{ listing.title }}</h1>
+        {% if error %}
+            <div class="alert alert-danger">{{ error }}</div>
+        {% endif %}
         <form method="POST">
             <div class="mb-3">
                 <label for="check_in" class="form-label">Check-in Date</label>
-                <input type="date" class="form-control" id="check_in" name="check_in" required>
+                <input type="date" class="form-control" id="check_in" name="check_in" required
+                oninput="setCheckOutMinDate(); disableUnavailableDates();">
             </div>
             <div class="mb-3">
                 <label for="check_out" class="form-label">Check-out Date</label>
@@ -22,4 +26,37 @@
         </form>
     </div>
 </div>
+
+<script>
+    const unavailableDates = {{ unavailable_dates|tojson }};
+
+    function setCheckOutMinDate() {
+        const checkIn = document.getElementById('check_in').value;
+        const checkOut = document.getElementById('check_out');
+        checkOut.min = checkIn;
+    }
+
+    function disableUnavailableDates() {
+        const checkIn = document.getElementById('check_in');
+        const checkOut = document.getElementById('check_out');
+
+        checkIn.addEventListener('input', () => {
+            unavailableDates.forEach(([start, end]) => {
+                if (checkIn.value >= start && checkIn.value <= end) {
+                    alert('Selected date is unavailable. Please choose another date.');
+                    checkIn.value = '';
+                }
+            });
+        });
+
+        checkOut.addEventListener('input', () => {
+            unavailableDates.forEach(([start, end]) => {
+                if (checkOut.value >= start && checkOut.value <= end) {
+                    alert('Selected date is unavailable. Please choose another date.');
+                    checkOut.value = '';
+                }
+            });
+        });
+    }
+</script>
 {% endblock %}