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further refactoring and location search dev

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This commit is contained in:
Joshua Burman
2024-12-28 12:41:57 -05:00
parent 8e0ec614a0
commit afe633e697
11 changed files with 179 additions and 113 deletions
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156
lib/widgets/generic/elements/form_search_input.dart
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@ -1,7 +1,29 @@
import 'dart:async';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart';
import 'package:sendtrain/widgets/generic/elements/form_text_input.dart';
import 'package:uuid/uuid.dart';
class Suggestion {
final String placeId;
final String description;
final String address;
Suggestion(this.placeId, this.description, this.address);
@override
String toString() {
return 'Suggestion(description: $description, placeId: $placeId)';
}
Map toJson() => {
'placeId': placeId,
'name': description,
'address': address,
};
}
class FormSearchInput extends StatefulWidget {
const FormSearchInput({super.key, required this.sessionController});
@ -26,15 +48,55 @@ class _FormSearchInputState extends State<FormSearchInput> {
_currentQuery = query;
// In a real application, there should be some error handling here.
final Iterable<String> options = await _FakeAPI.search(_currentQuery!);
// final Iterable<String> options = await _FakeAPI.search(_currentQuery!);
if (query.isNotEmpty) {
final List<Suggestion>? suggestions =
await fetchSuggestions(_currentQuery!, 'en');
// If another search happened after this one, throw away these options.
if (_currentQuery != query) {
// If another search happened after this one, throw away these options.
if (_currentQuery != query) {
return null;
}
_currentQuery = null;
return suggestions?.map((suggestion) => json.encode(suggestion));
} else {
return null;
}
_currentQuery = null;
}
return options;
final sessionToken = Uuid().v4();
final apiKey = "AIzaSyBCjMCEAyyNVpsnVYvZj6VL1mmB98Vd6AE";
final client = Client();
Future<List<Suggestion>?> fetchSuggestions(String input, String lang) async {
var headers = {
'Content-Type': 'application/json',
'X-Goog-Api-Key': apiKey,
"Access-Control-Allow-Origin": "*",
'X-Goog-FieldMask': 'places.displayName,places.id,places.formattedAddress'
};
var request = Request('POST',
Uri.parse('https://places.googleapis.com/v1/places:searchText'));
request.body = json.encode({"textQuery": input});
request.headers.addAll(headers);
StreamedResponse response = await request.send();
if (response.statusCode == 200) {
final result = json.decode(await response.stream.bytesToString());
if (result.isNotEmpty) {
return result['places']
.map<Suggestion>((p) => Suggestion(
p['id'], p['displayName']['text'], p['formattedAddress']))
.toList();
} else {
return null;
}
} else {
throw Exception(response.reasonPhrase);
}
}
@override
@ -46,64 +108,44 @@ class _FormSearchInputState extends State<FormSearchInput> {
@override
Widget build(BuildContext context) {
return SearchAnchor(
builder: (BuildContext context, SearchController controller) {
return FormTextInput(
controller: widget.sessionController,
title: 'Location (optional)',
icon: Icon(Icons.search_rounded),
maxLines: 2,
onTap: () {
controller.openView();
});
}, suggestionsBuilder:
(BuildContext context, SearchController controller) async {
final List<String>? options =
(await _debouncedSearch(controller.text))?.toList();
if (options == null) {
return _lastOptions;
}
_lastOptions = List<ListTile>.generate(options.length, (int index) {
final String item = options[index];
return ListTile(
title: Text(item),
onTap: () {
if (item.isNotEmpty) {
widget.sessionController.text = item;
}
controller.closeView(item);
// debugPrint('You just selected $item');
// Navigator.of(context).pop();
},
);
builder: (BuildContext context, SearchController controller) {
return FormTextInput(
controller: widget.sessionController,
title: 'Location (optional)',
icon: Icon(Icons.search_rounded),
maxLines: 2,
onTap: () {
controller.openView();
});
}, suggestionsBuilder:
(BuildContext context, SearchController controller) async {
final List<String>? options =
(await _debouncedSearch(controller.text))?.toList();
if (options == null) {
return _lastOptions;
}
_lastOptions = List<ListTile>.generate(options.length, (int index) {
final String item = options[index];
return ListTile(
title: Text(json.decode(item)['name']),
onTap: () {
if (item.isNotEmpty) {
widget.sessionController.text = json.decode(item)['name'];
}
client.close();
controller.closeView(item);
// debugPrint('You just selected $item');
// Navigator.of(context).pop();
},
);
});
return _lastOptions;
});
}
}
const Duration fakeAPIDuration = Duration(seconds: 1);
const Duration debounceDuration = Duration(milliseconds: 500);
class _FakeAPI {
static const List<String> _kOptions = <String>[
'aardvark',
'bobcat',
'chameleon',
];
// Searches the options, but injects a fake "network" delay.
static Future<Iterable<String>> search(String query) async {
await Future<void>.delayed(fakeAPIDuration); // Fake 1 second delay.
if (query == '') {
return const Iterable<String>.empty();
}
return _kOptions.where((String option) {
return option.contains(query.toLowerCase());
return _lastOptions;
});
}
}
const Duration debounceDuration = Duration(milliseconds: 500);
typedef _Debounceable<S, T> = Future<S?> Function(T parameter);
/// Returns a new function that is a debounced version of the given function.