How to Create a Dynamic Itinerary Planner for Travelers in FlutterFlow

Create a trips collection with fields: userId (String), destination (String), startDate (Timestamp), endDate (Timestamp), coverImageUrl (String), budget (Double), totalSpent (Double, calculated). Under each trip, create a days subcollection with fields: dayNumber (Integer), date (Timestamp). Under each day, create an activities subcollection with fields: title (String), startTime (Timestamp), endTime (Timestamp), location (String), latitude (Double), longitude (Double), notes (String), category (String: transport, hotel, sightseeing, food, activity), cost (Double). When a new trip is created, automatically generate day documents based on the date range between startDate and endDate.

Create a TripsPage with a ListView querying trips filtered by userId equals currentUser.uid, ordered by startDate descending. Each trip card shows the coverImageUrl as a background, destination name, date range, and a progress indicator for budget spent. Add a FloatingActionButton that opens a BottomSheet with the trip creation form: destination TextField, startDate and endDate DatePickers, budget TextField (numeric), and a coverImageUrl upload with FlutterFlowUploadButton. On Save, create the trip document and then use a Custom Action to calculate the number of days between start and end dates and create a day document for each in the days subcollection.

Create a TripDetailPage with Route Parameter tripRef. Query the days subcollection ordered by dayNumber ascending. Build a TabBar dynamically with one tab per day, labeled 'Day 1', 'Day 2', and so on with the date below each label. Each tab's content is a ListView querying the activities subcollection for that day, ordered by startTime ascending. Each activity row is a Container styled as a timeline card: a vertical line on the left with a colored dot (color by category: blue for transport, green for sightseeing, orange for food, purple for hotel), the time range on the left, and the activity title, location, and cost on the right. Add a plus FloatingActionButton to add a new activity to the currently selected day.

Above the activity timeline on each day tab, add a FlutterFlowGoogleMap widget with a fixed height of 250. Query the day's activities and place a marker for each activity at its latitude and longitude coordinates. Customize marker colors by category using the same color scheme as the timeline. Draw a Polyline connecting activities in chronological order to show the day's route. On marker tap, show the activity title and time in the map's info window. Add a Directions button below the map that constructs a Google Maps URL with all activity locations as waypoints and opens it with url_launcher for turn-by-turn navigation.

Create an Add Activity BottomSheet with fields: title TextField, category DropDown (transport, hotel, sightseeing, food, activity), startTime and endTime TimePickers, location TextField with Google Places autocomplete integration, cost TextField (numeric), and notes TextField (multiline). For location autocomplete, use FlutterFlow's built-in Google Places integration or a Custom Widget that calls the Places Autocomplete API. When the user selects a place, auto-fill the location name and extract latitude and longitude from the Places result. On Save, create the activity document in the selected day's activities subcollection and update the trip's totalSpent by adding the activity cost.

On the TripDetailPage header, add a budget summary Row showing totalSpent out of budget with a LinearPercentIndicator. Color the indicator green when under 75 percent, yellow at 75-90 percent, and red above 90 percent. Create a Custom Function that sums all activity costs across all days for the trip to calculate totalSpent. Trigger this calculation on page load and after any activity is added, edited, or deleted. Add a budget breakdown by category: a Container showing how much was spent on transport, food, sightseeing, hotel, and activities using colored bars or a simple list. On the TripsPage, show the budget percentage on each trip card for quick status overview.