How to Build an Appointment Scheduling System in FlutterFlow

Create a providers collection with fields: userId (String), displayName (String), avatarUrl (String), specialty (String: 'Doctor', 'Dentist', 'Therapist', etc.), rating (Double), workingHours (Map: {startHour: 9, endHour: 17, daysOfWeek: [1,2,3,4,5]} where 1=Monday, 7=Sunday), and slotDurationMinutes (Integer: 30 or 60). Create a services collection with fields: name (String), durationMinutes (Integer), price (Double), and providerId (String). Create an appointments collection with fields: userId (String), providerId (String), serviceId (String), dateTime (Timestamp), duration (Integer, minutes), status (String: 'confirmed', 'cancelled', 'completed'), notes (String, optional), and createdAt (Timestamp). Set Firestore rules: users can read providers and services, users can read and create their own appointments, and providers can read and update appointments assigned to them.

Create a ProvidersPage with a ListView bound to a Backend Query on the providers collection. Add a ChoiceChips filter for specialty (All, Doctor, Dentist, Therapist, etc.) and a sort DropDown (Rating, Name). Each provider card is a Component showing: CircleImage (avatar), displayName Text, specialty badge Container, rating displayed as stars (Row of 5 Icon widgets, filled or outlined based on rating value via Conditional Styling), and a Text showing available days. Tapping a provider navigates to the BookingPage passing the provider document reference. Add a search TextField for finding providers by name.

On the BookingPage, display the provider's info at the top. Add a DateTimePicker (date only mode) defaulting to today, with min date set to today and max date set to 30 days ahead. When a date is selected, create a Custom Function named getAvailableSlots that: (1) takes the provider's workingHours (startHour, endHour), slotDurationMinutes, and the selected date; (2) generates all possible slots from startHour to endHour in increments of slotDurationMinutes (e.g., 9:00, 9:30, 10:00, ... 16:30 for a 30-min slot with 9-17 hours); (3) queries existing appointments for this provider on the selected date with status != 'cancelled'; (4) removes booked slots from the list; (5) checks that the selected date's day-of-week is in the provider's daysOfWeek array. Display available slots as a Wrap widget of tappable Chip-style Containers, each showing the time (e.g., '10:30 AM'). Booked slots are greyed out or hidden. Tapping an available slot stores it in Page State selectedSlot.

Below the time slots, add a service DropDown (filtered by this providerId) and an optional notes TextField. Add a Book Appointment button that activates only when a date, time slot, and service are selected (Conditional Enabling). On Tap Action Flow: Create Document in appointments with userId (current user), providerId, serviceId, dateTime (combine selected date + selected slot time into a Timestamp), duration (from the service's durationMinutes), status 'confirmed', notes, and createdAt as server timestamp. After creation, show a confirmation BottomSheet displaying the appointment details: provider name, date, time, service, and a calendar-add suggestion. Optionally, call a Cloud Function to send a confirmation email or push notification to both the user and provider. Navigate back to a MyAppointmentsPage.

Create a MyAppointmentsPage with two tabs: Upcoming and Past. Upcoming tab: ListView of appointments where userId equals current user, status equals 'confirmed', and dateTime is in the future, ordered by dateTime ascending. Each row shows: provider name, service name, date and time, and a Cancel button. The Cancel button's On Tap Action Flow: first check if the appointment dateTime is more than 24 hours from now using a Custom Function that compares dateTime - DateTime.now() > 24 hours. If yes, show a confirmation dialog, then update the appointment status to 'cancelled'. If under 24 hours, show a message: 'Appointments cannot be cancelled within 24 hours. Please contact the provider directly.' Past tab: appointments where dateTime is in the past, with a 'Leave Review' option. Providers see their own dashboard with a similar layout filtered by providerId.