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location image search and population for new session

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This commit is contained in:
Joshua Burman
2024-12-30 01:54:51 -05:00
parent afe633e697
commit 5f628d6b48
11 changed files with 337 additions and 168 deletions
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159
lib/widgets/generic/elements/form_search_input.dart
View File

@ -1,34 +1,17 @@
import 'dart:async';
import 'dart:convert';
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:http/http.dart';
import 'package:sendtrain/services/apis/google_places_service.dart';
import 'package:sendtrain/services/functional/debouncer.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});
const FormSearchInput(
{super.key, required this.sessionController, this.optionalPayload});
final TextEditingController sessionController;
final dynamic optionalPayload;
@override
State<FormSearchInput> createState() => _FormSearchInputState();
@ -37,21 +20,22 @@ class FormSearchInput extends StatefulWidget {
class _FormSearchInputState extends State<FormSearchInput> {
String? _currentQuery;
final service = GooglePlacesService();
// The most recent suggestions received from the API.
late Iterable<Widget> _lastOptions = <Widget>[];
late final _Debounceable<Iterable<String>?, String> _debouncedSearch;
late final Debouncer debouncer;
// Calls the "remote" API to search with the given query. Returns null when
// the call has been made obsolete.
Future<Iterable<String>?> _search(String query) async {
Future<Iterable<Suggestion>?> _search(String query) async {
_currentQuery = query;
// In a real application, there should be some error handling here.
// final Iterable<String> options = await _FakeAPI.search(_currentQuery!);
if (query.isNotEmpty) {
final List<Suggestion>? suggestions =
await fetchSuggestions(_currentQuery!, 'en');
await service.fetchSuggestions(_currentQuery!, 'en');
// If another search happened after this one, throw away these options.
if (_currentQuery != query) {
@ -59,50 +43,16 @@ class _FormSearchInputState extends State<FormSearchInput> {
}
_currentQuery = null;
return suggestions?.map((suggestion) => json.encode(suggestion));
return suggestions?.map((suggestion) => suggestion);
} else {
return null;
}
}
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
void initState() {
super.initState();
_debouncedSearch = _debounce<Iterable<String>?, String>(_search);
debouncer = Debouncer(Duration(milliseconds: 50), _search);
}
@override
@ -114,28 +64,37 @@ class _FormSearchInputState extends State<FormSearchInput> {
title: 'Location (optional)',
icon: Icon(Icons.search_rounded),
maxLines: 2,
requiresValidation: false,
onTap: () {
controller.openView();
});
}, suggestionsBuilder:
(BuildContext context, SearchController controller) async {
final List<String>? options =
(await _debouncedSearch(controller.text))?.toList();
final List<Suggestion>? options =
(await debouncer.process(controller.text))?.toList();
if (options == null) {
return _lastOptions;
}
_lastOptions = List<ListTile>.generate(options.length, (int index) {
final String item = options[index];
final Suggestion item = options[index];
return ListTile(
title: Text(json.decode(item)['name']),
onTap: () {
if (item.isNotEmpty) {
widget.sessionController.text = json.decode(item)['name'];
title: Text(item.description),
onTap: () async {
// widget.optionalPayload = service.fetchPhoto(json.decode(item.image));
if (item.imageReferences != null) {
// get a random photo item from the returned result
Map<String, dynamic> photo = item.imageReferences![
Random().nextInt(item.imageReferences!.length)];
await service.fetchPhoto(photo['name']).then((photoMap) {
widget.optionalPayload.photoUri = photoMap['photoUri'];
});
}
client.close();
controller.closeView(item);
// debugPrint('You just selected $item');
// Navigator.of(context).pop();
widget.optionalPayload.address = item.address;
widget.sessionController.text = item.description;
service.finish();
controller.closeView(item.description);
},
);
});
@ -144,55 +103,3 @@ class _FormSearchInputState extends State<FormSearchInput> {
});
}
}
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.
///
/// This means that the original function will be called only after no calls
/// have been made for the given Duration.
_Debounceable<S, T> _debounce<S, T>(_Debounceable<S?, T> function) {
_DebounceTimer? debounceTimer;
return (T parameter) async {
if (debounceTimer != null && !debounceTimer!.isCompleted) {
debounceTimer!.cancel();
}
debounceTimer = _DebounceTimer();
try {
await debounceTimer!.future;
} on _CancelException {
return null;
}
return function(parameter);
};
}
// A wrapper around Timer used for debouncing.
class _DebounceTimer {
_DebounceTimer() {
_timer = Timer(debounceDuration, _onComplete);
}
late final Timer _timer;
final Completer<void> _completer = Completer<void>();
void _onComplete() {
_completer.complete();
}
Future<void> get future => _completer.future;
bool get isCompleted => _completer.isCompleted;
void cancel() {
_timer.cancel();
_completer.completeError(const _CancelException());
}
}
// An exception indicating that the timer was canceled.
class _CancelException implements Exception {
const _CancelException();
}

16
lib/widgets/generic/elements/form_text_input.dart
View File

@ -8,7 +8,8 @@ class FormTextInput extends StatelessWidget {
this.icon,
this.maxLines,
this.minLines,
this.onTap});
this.onTap,
this.requiresValidation=true});
final TextEditingController controller;
final String title;
@ -16,6 +17,7 @@ class FormTextInput extends StatelessWidget {
final int? minLines;
final Icon? icon;
final dynamic onTap;
final bool requiresValidation;
@override
Widget build(BuildContext context) {
@ -34,12 +36,14 @@ class FormTextInput extends StatelessWidget {
labelText: title,
),
validator: (String? value) {
if (value == null || value.isEmpty) {
return 'Please enter some text';
}
if (requiresValidation == true) {
if (value == null || value.isEmpty) {
return 'Please enter some text';
}
if (value.length < 3) {
return 'Please enter a minimum of 3 characters';
if (value.length < 3) {
return 'Please enter a minimum of 3 characters';
}
}
return null;
},