106 lines
3.4 KiB
Dart
106 lines
3.4 KiB
Dart
import 'dart:async';
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import 'dart:math';
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import 'package:flutter/material.dart';
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import 'package:sendtrain/services/apis/google_places_service.dart';
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import 'package:sendtrain/services/functional/debouncer.dart';
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import 'package:sendtrain/widgets/generic/elements/form_text_input.dart';
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class FormSearchInput extends StatefulWidget {
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const FormSearchInput(
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{super.key, required this.sessionController, this.optionalPayload});
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final TextEditingController sessionController;
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final dynamic optionalPayload;
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@override
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State<FormSearchInput> createState() => _FormSearchInputState();
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}
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class _FormSearchInputState extends State<FormSearchInput> {
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String? _currentQuery;
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final service = GooglePlacesService();
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// The most recent suggestions received from the API.
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late Iterable<Widget> _lastOptions = <Widget>[];
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late final Debouncer debouncer;
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// Calls the "remote" API to search with the given query. Returns null when
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// the call has been made obsolete.
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Future<Iterable<Suggestion>?> _search(String query) async {
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_currentQuery = query;
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// In a real application, there should be some error handling here.
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// final Iterable<String> options = await _FakeAPI.search(_currentQuery!);
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if (query.isNotEmpty) {
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final List<Suggestion>? suggestions =
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await service.fetchSuggestions(_currentQuery!, 'en');
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// If another search happened after this one, throw away these options.
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if (_currentQuery != query) {
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return null;
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}
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_currentQuery = null;
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return suggestions?.map((suggestion) => suggestion);
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} else {
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return null;
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}
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}
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@override
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void initState() {
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super.initState();
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debouncer = Debouncer(Duration(milliseconds: 50), _search);
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}
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@override
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Widget build(BuildContext context) {
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return SearchAnchor(
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builder: (BuildContext context, SearchController controller) {
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return FormTextInput(
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controller: widget.sessionController,
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title: 'Location (optional)',
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icon: Icon(Icons.search_rounded),
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maxLines: 2,
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requiresValidation: false,
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onTap: () {
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controller.openView();
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});
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}, suggestionsBuilder:
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(BuildContext context, SearchController controller) async {
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final List<Suggestion>? options =
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(await debouncer.process(controller.text))?.toList();
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if (options == null) {
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return _lastOptions;
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}
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_lastOptions = List<ListTile>.generate(options.length, (int index) {
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final Suggestion item = options[index];
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return ListTile(
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title: Text(item.description),
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onTap: () async {
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// widget.optionalPayload = service.fetchPhoto(json.decode(item.image));
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if (item.imageReferences != null) {
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// get a random photo item from the returned result
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Map<String, dynamic> photo = item.imageReferences![
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Random().nextInt(item.imageReferences!.length)];
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await service.fetchPhoto(photo['name']).then((photoMap) {
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widget.optionalPayload.photoUri = photoMap['photoUri'];
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});
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}
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widget.optionalPayload.address = item.address;
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widget.sessionController.text = item.description;
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service.finish();
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controller.closeView(item.description);
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},
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);
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});
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return _lastOptions;
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});
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}
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}
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