Amazon Style Filters

The custom function behind the youtube tutorial on filtering multiple attributes from a list of attributes.

import 'dart:convert';
import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:intl/intl.dart';
import 'package:timeago/timeago.dart' as timeago;
import '/flutter_flow/custom_functions.dart';
import '/flutter_flow/lat_lng.dart';
import '/flutter_flow/place.dart';
import '/flutter_flow/uploaded_file.dart';
import '/backend/backend.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

bool? listFilter(
  List<String>? listAttributes,
  List<String>? selectedAttributes,
) {
  /// MODIFY CODE ONLY BELOW THIS LINE

// If either list is null, treat as empty list
  final list = listAttributes ?? [];
  final selected = selectedAttributes ?? [];

  // Show all if nothing is selected
  if (selected.isEmpty) return true;

  // Return true if any product color matches a selected color
  return list.any((item) => selected.contains(item));

  /// MODIFY CODE ONLY ABOVE THIS LINE
}