Как получить информацию о близлежащих местах из Google Maps с помощью Flutter?

flutter pub add flutter_dotenv

touch .env

#DOT ENV
*.env

import 'package:flutter_dotenv/flutter_dotenv.dart';

void main() async {
....

 // Initialize dot env
  await dotenv.load(fileName: ".env");
// Pass prefs as value in MyApp
  runApp(MyApp(prefs: prefs));
}

#find assets section 
assets:
    # Splash Screens
    - assets/splash/om_splash.png
    - assets/splash/om_lotus_splash.png
    - assets/splash/om_lotus_splash_1152x1152.png
    # Onboard Screens
    - assets/onboard/FindTemples.png
    - assets/onboard/FindVenues.png
    # Auth Screens
    - assets/AuthScreen/WelcomeScreenImage_landscape_2.png  
// add this here
   # Dotenv flie
    - .env

#Without quotes
GMAP_PLACES_API_KEY = Your_API_KEY

flutter pub add http

# Make folders
mkdir  lib/screens/temples lib/screens/temples/providers lib/screens/temples/screens lib/screens/temples/widgets lib/screens/temples/models lib/screens/temples/utils

# Make files
touch lib/screens/temples/providers/temples_provider.dart lib/screens/temples/screens/temples_screen.dart  lib/screens/temples/widgets/temples_item_widget.dart lib/screens/temples/models/temple.dart lib/screens/temples/utils/temple_utils.dart

import 'package:flutter_dotenv/flutter_dotenv.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';

class TemplesUtils {
  // Base url for google maps nearbysearch
  // #1
  static const String _baseUrlNearBySearch =
      "https://maps.googleapis.com/maps/api/place/nearbysearch/json?";
  // get api key
  // #2
  final String _placesApi = dotenv.env['GMAP_PLACES_API_KEY'] as String;

  // Create a method that'll parse complete url and return it using http package
  // #3
  Uri searchUrl(LatLng userLocation) {
    // Create variables that'll pass maps API parmas as string
  // # 4
//===================//
    final api = "&key=$_placesApi";

    final location =
        "location=${userLocation.latitude},${userLocation.longitude}";

    const type = "&type=hindu_temple";
    // Closest first
  // #5
    const rankBy = "&rankby=distance";
//=====================//
    // Parse URL to get a new uri object
  // #6
    final url =
        Uri.parse(_baseUrlNearBySearch + location + rankBy + type + api);

    return URL;
  }
}

 List<TempleModel> mapper(List results) {
    final newList = results
        .map(
          (temple) => TempleModel(
            name: temple['name'],
            address: temple['address'],
            latLng: LatLng(
              temple['latLng']['lat'],
              temple['latLng']['lon'],
            ),
            imageUrl: temple['imageRef'],
            placesId: temple['place_id'],
          ),
        )
        .toList();

    return newList;
  }

import 'package:google_maps_flutter/google_maps_flutter.dart';

class TempleModel {
  // name of temple
  final String name;
  // the address
  final String address;
  // geo location
  final LatLng latLng;
  // ImageUrls
  final String imageUrl;
  // id given to each item by places api
  final String placesId;

  const TempleModel(
      {required this.name,
      required this.address,
      required this.latLng,
      required this.imageUrl,
      required this.placesId});
}

import 'dart:convert';
import 'dart:math';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:cloud_functions/cloud_functions.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_storage/firebase_storage.dart' as firbase_storage;
import 'package:flutter/foundation.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:http/http.dart' as http;

//custom modules
import 'package:temple/screens/temples/models/temple.dart';
import 'package:temple/screens/temples/utils/temple_utils.dart';

class TempleProvider with ChangeNotifier {}

// Instantiate FIbrebase products
  final FirebaseAuth auth = FirebaseAuth.instance;
  final FirebaseFunctions functions = FirebaseFunctions.instance;
  final FirebaseFirestore firestore = FirebaseFirestore.instance;
  // Estabish sotrage instance for bucket of our choice
  // once e mulator runs you can find the bucket name at storage tab
  final firbase_storage.FirebaseStorage storage =
      firbase_storage.FirebaseStorage.instanceFor(
          bucket: 'astha-being-hindu-tutorial.appspot.com');

// Instantiate Temple Utils
final TemplesUtils templesUtils = TemplesUtils();
  // Create the fake list of temples
  List<TempleModel>? _temples = [];
  // User location from db
  LatLng? _userLocation;

// Getters
  List<TempleModel> get temples => [..._temples as List];
  LatLng get userLocation => _userLocation as LatLng;

// List of Images

  static const List<String> imagePaths = [
    'image_1.jpg',
    'image_2.jpg',
    'image_3.jpg',
    'image_4.jpg',
  ];

// Future method to get temples
   Future<List<TempleModel>?> getNearyByTemples(LatLng userLocation) async {
    // Get urls from the temple utils
    // #1
    Uri url = templesUtils.searchUrl(userLocation);

    try {
      // Set up references for firebase products.
      // Callable getNearbyTemples
       // #2
      HttpsCallable getNearbyTemples =
          functions.httpsCallable('getNearbyTemples');
      // Collection reference for temples
      // # 3
      CollectionReference templeDocRef = firestore.collection('temples');
      // Get one doc from temples collection
      // #4
      QuerySnapshot querySnapshot = await templeDocRef.limit(1).get();
      // A reference to a folder in storage that has images.
      // #5
      firbase_storage.Reference storageRef = storage.ref('TempleImages');

      // We'll only get nearby temples if the temple's collection empty
      // #6
      if (querySnapshot.docs.isEmpty) {
        print("Temple collection is empty");
        // get the result from api search
       // #7
        final res = await http.get(url);
        // decode to json result
       // #8
        final decodedRes = await jsonDecode(res.body) as Map;
        // get result as list
       // #9
        final results = await decodedRes['results'] as List;
        // Get random image url from available ones to put as images
        // Since we have 4 images we'll get 0-3 values from Random()
       // #10
        final imgUrl = await storageRef
            .child(imagePaths[Random().nextInt(4)])
            .getDownloadURL();
        // Call the function
       // #11
        final templesListCall = await getNearbyTemples.call(<String, dynamic>{
          'templeList': [...results],
          'imageRef': imgUrl,
        });

        // map the templesList returned by https callable
       // we'll use utils mapper here
       // #12
        final newTempleLists = templesUtils.mapper(templesListCall.data['temples']);
        // update the new temples list
       // #13
        _temples = [...newTempleLists];
      } else {
        // If the temples collection already has temples then we won't write
        // but just fetch temples collection
       // #14
        print("Temple collection is not empty");
        try {
          // get all temples documents
          final tempSnapShot = await templeDocRef.get();
          // fetch the values as list.
          final tempList = tempSnapShot.docs[0]['temples'] as List;
          // map the results into a list
          final templesList = templesUtils.mapper(tempList);
          // update temples
          _temples = [...templesList];
        } catch (e) {
          // incase of error temples list in empty
       // # 15
          _temples = [];
        }
      }
    } catch (e) {
      // incase of error temples list in empty
      _temples = [];
    }
// notify all the listeners
    notifyListeners();
 // #16
  return _temples;
  }

exports.getNearbyTemples = functions.https.onCall(async (data, _) => {

    try {
        // Notify function's been called
        functions.logger.log("Add nearby temples function was called");
        // Create array of temple objects.
        let temples = data.templeList.map((temple) => {
            return {
                'place_id': temple['place_id'],
                'address': temple['vicinity'] ? temple['vicinity'] : 'Not Available',
                'name': temple['name'] ? temple['name'] : 'Not Available',
                'latLng': {
                    'lat': temple.hasOwnProperty('geometry') ? temple['geometry']['location']['lat'] : 'Not Available', 'lon': temple.hasOwnProperty('geometry') ? temple['geometry']['location']['lng'] : 'Not Available',
                    'dateAdded': admin.firestore.Timestamp.now()
                },
                'imageRef': data.imageRef
            }
        }

        );

        // save the temples array to temples collection as one document named temples 
        await db.collection('temples').add({ temples: temples });

    } catch (e) {
        // if error return errormsg
        return { 'Error Msg': e };
    }
    // If everything's fine return the temples array.
    return temples;
});

// When the temple List Updates
exports.updateNearbyTemples = functions.runWith({
    timeoutSeconds: 120,
    memory: "256MB"
}).firestore.document('temples/{id}').onUpdate(async (change, context) => {
    // If theres both new and old value
    if (change.before.exists && change.after.exists) {
        // temples list both new and old
        let newTemplesList = change.after.data()['temples'];
        let oldTemplesList = change.before.data()['temples'];

        // Places Id list from both new and old list
        let oldTemplesIdList = oldTemplesList.map(temple => temple['place_id']);
        let newTemplesIdList = newTemplesList.map(temple => temple['place_id']);

        // Lets find out if theres new temples id by filtering with old one
        let filteredList = newTemplesIdList.filter(x => !oldTemplesIdList.includes(x));

        // if the length are not same of fileted list has 
        //length of 0 then nothing new is there so just return
        if (oldTemplesIdList.length != newTemplesIdList.length || filteredList.length == 0) {
            functions.logger.log("Nothing is changed so onUpdate returned");
            return;
        }
        // If somethings changed then 
        try {
            functions.logger.log("On Update was called ");
            // Make new list of temples
            let temples = newTemplesList.map((temple) => {
                return {
                    'place_id': temple['place_id'],
                    'address': temple['vicinity'] ? temple['vicinity'] : 'Not Available',
                    'name': temple['name'] ? temple['name'] : 'Not Available',
                    'latLng': {
                        'lat': temple.hasOwnProperty('geometry') ? temple['geometry']['location']['lat'] : 'Not Available', 'lon': temple.hasOwnProperty('geometry') ? temple['geometry']['location']['lng'] : 'Not Available',
                        'dateAdded': admin.firestore.Timestamp.now()
                    }
                }
            }
            );
            // use the current context id to update temples, no need to merge
            await db.collection('temples').doc(context.params.id).set({ 'palces_id_list': newTemplesIdList, temples: temples });
        }
        catch (e) { throw e; }
        return { 'status': 200 };
    }
    // return nothing
    return null;
});

 MultiProvider(
      providers: [
       ...
        ChangeNotifierProvider(create: (context) => TempleProvider()),
        ...
      ],
...

import 'dart:convert';
import 'dart:math';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:cloud_functions/cloud_functions.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_storage/firebase_storage.dart' as firbase_storage;
import 'package:flutter/foundation.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:http/http.dart' as http;

//custom modules
import 'package:temple/screens/temples/models/temple.dart';
import 'package:temple/screens/temples/utils/temple_utils.dart';

class TempleProvider with ChangeNotifier {
  // Instantiate FIbrebase products
  final FirebaseAuth auth = FirebaseAuth.instance;
  final FirebaseFunctions functions = FirebaseFunctions.instance;
  final FirebaseFirestore firestore = FirebaseFirestore.instance;
  // Estabish sotrage instance for bucket of our choice
  // once e mulator runs you can find the bucket name at storage tab
  final firbase_storage.FirebaseStorage storage =
      firbase_storage.FirebaseStorage.instanceFor(
          bucket: 'astha-being-hindu-tutorial.appspot.com');

// Instantiate Temple Utils
  final TemplesUtils templesUtils = TemplesUtils();
  // Create the fake list of temples
  List<TempleModel>? _temples = [];
  // User location from db
  LatLng? _userLocation;

// Getters
  List<TempleModel> get temples => [..._temples as List];
  LatLng get userLocation => _userLocation as LatLng;

// List of Images
  static const List<String> imagePaths = [
    'image_1.jpg',
    'image_2.jpg',
    'image_3.jpg',
    'image_4.jpg',
  ];

// Future method to get temples
  Future<void> getNearyByTemples(LatLng userLocation) async {
    // Get urls from the temple utils
    Uri url = templesUtils.searchUrl(userLocation);

    try {
      // Set up references for firebase products.
      // Callable getNearbyTemples
      HttpsCallable getNearbyTemples =
          functions.httpsCallable('getNearbyTemples');
      // COllection reference for temples
      CollectionReference templeDocRef = firestore.collection('temples');
      // Get one doc from temples collection
      QuerySnapshot querySnapshot = await templeDocRef.limit(1).get();
      // A reference to a folder in storage that has images.
      firbase_storage.Reference storageRef = storage.ref('TempleImages');

      // We'll only get nearby temples if the temples collection empty
      if (querySnapshot.docs.isEmpty) {
        print("Temple collection is empty");
        // get the result from api search
        final res = await http.get(url);
        // decode the json result
        final decodedRes = await jsonDecode(res.body) as Map;
        // get result as list
        final results = await decodedRes['results'] as List;
        // Get random image url from available ones to put as images
        // Since we have 4 images we'll get 0-3 values from Random()
        final imgUrl = await storageRef
            .child(imagePaths[Random().nextInt(4)])
            .getDownloadURL();
        // Call the function
        final templesListCall = await getNearbyTemples.call(<String, dynamic>{
          'templeList': [...results],
          'imageRef': imgUrl,
        });

        // map the templesList restured by https callable
        final newTempleLists = templesListCall.data['temples']
            .map(
              (temple) => TempleModel(
                name: temple['name'],
                address: temple['address'],
                latLng: LatLng(
                  temple['latLng']['lat'],
                  temple['latLng']['lon'],
                ),
                imageUrl: temple['imageRef'],
                placesId: temple['place_id'],
              ),
            )
            .toList();
        // update the new temples list
        _temples = [...newTempleLists];
      } else {
        // If the temples collection already has temples then we won't write
        // but just fetch temples collection
        print("Temple collection is not empty");

        try {
          // get all temples documents
          final tempSnapShot = await templeDocRef.get();
          // fetch the values as list.
          final tempList = tempSnapShot.docs[0]['temples'] as List;
          // map the results into a list
          final templesList = tempList
              .map(
                (temple) => TempleModel(
                  name: temple['name'],
                  address: temple['address'],
                  latLng: LatLng(
                    temple['latLng']['lat'],
                    temple['latLng']['lon'],
                  ),
                  imageUrl: temple['imageRef'],
                  placesId: temple['place_id'],
                ),
              )
              .toList();
          // update temples
          _temples = [...templesList];
        } catch (e) {
          // incase of error temples list in empty
          _temples = [];
        }
      }
    } catch (e) {
      // incase of error temples list in empty

      _temples = [];
    }
// notify all the listeners
    notifyListeners();
  }
}

// Import modiules
const functions = require("firebase-functions"),
    admin = require('firebase-admin');

// always initialize admin 
admin.initializeApp();

// create a const to represent firestore
const db = admin.firestore();


// Create a new background trigger function 
exports.addTimeStampToUser = functions.runWith({
    timeoutSeconds: 240,  // Give timeout 
    memory: "512MB" // memory allotment 
}).firestore.document('users/{userId}').onCreate(async (_, context) => {
    // Get current timestamp from server
    let curTimeStamp = admin.firestore.Timestamp.now();
    // Print current timestamp on server
    functions.logger.log(`curTimeStamp ${curTimeStamp.seconds}`);

    try {
        // add the new value to new users document i
        await db.collection('users').doc(context.params.userId).set({ 'registeredAt': curTimeStamp, 'favTempleList': [], 'favShopsList': [], 'favEvents': [] }, { merge: true });
        // if its done print in logger
        functions.logger.log(`The current timestamp added to users collection:  ${curTimeStamp.seconds}`);
        // always return something to end the function execution
        return { 'status': 200 };
    } catch (e) {
        // Print error incase of errors
        functions.logger.log(`Something went wrong could not add timestamp to users collectoin ${curTimeStamp.seconds}`);
        // return status 400 for error
        return { 'status': 400 };
    }
});

// Create a function named addUserLocation 
exports.addUserLocation = functions.runWith({
    timeoutSeconds: 60,
    memory: "256MB"
}).https.onCall(async (data, context) => {

    try {
        // Fetch correct user document with user id.
        let snapshot = await db.collection('users').doc((context.auth.uid)).get();
        // Check if field value for location is null
        // functions.logger.log(snapshot['_fieldsProto']['userLocation']["valueType"] === "nullValue");
        let locationValueType = snapshot['_fieldsProto']['userLocation']["valueType"];
        if (locationValueType == 'nullValue') {
            await db.collection('users').doc((context.auth.uid)).set({ 'userLocation': data.userLocation }, { merge: true });
            functions.logger.log(`User location added    ${data.userLocation}`);
            return data.userLocation;

        }
        else {
            functions.logger.log(`User location not changed`);

        }

    }
    catch (e) {
        functions.logger.log(e);
        throw new functions.https.HttpsError('internal', e);
    }
    return data.userLocation;

});


exports.getNearbyTemples = functions.https.onCall(async (data, _) => {

    try {
        // Notify function's been called
        functions.logger.log("Add nearby temples function was called");
        // Create array of temple objects.
        let temples = data.templeList.map((temple) => {
            return {
                'place_id': temple['place_id'],
                'address': temple['vicinity'] ? temple['vicinity'] : 'Not Available',
                'name': temple['name'] ? temple['name'] : 'Not Available',
                'latLng': {
                    'lat': temple.hasOwnProperty('geometry') ? temple['geometry']['location']['lat'] : 'Not Available', 'lon': temple.hasOwnProperty('geometry') ? temple['geometry']['location']['lng'] : 'Not Available',
                    'dateAdded': admin.firestore.Timestamp.now()
                },
                'imageRef': data.imageRef
            }
        }

        );

        // save the temples array to temples collection as one document named temples 
        await db.collection('temples').add({ temples: temples });

    } catch (e) {
        // if error return errormsg
        return { 'Error Msg': e };
    }
    // If everything's fine return the temples array.
    return temples;
});


// When the temple List Updates
exports.updateNearbyTemples = functions.runWith({
    timeoutSeconds: 120,
    memory: "256MB"
}).firestore.document('temples/{id}').onUpdate(async (change, context) => {
    // If theres both new and old value
    if (change.before.exists && change.after.exists) {
        // temples list both new and old
        let newTemplesList = change.after.data()['temples'];
        let oldTemplesList = change.before.data()['temples'];

        // Places Id list from both new and old list
        let oldTemplesIdList = oldTemplesList.map(temple => temple['place_id']);
        let newTemplesIdList = newTemplesList.map(temple => temple['place_id']);

        // Lets find out if theres new temples id by filtering with old one
        let filteredList = newTemplesIdList.filter(x => !oldTemplesIdList.includes(x));

        // if the length are not same of fileted list has 
        //length of 0 then nothing new is there so just return
        if (oldTemplesIdList.length != newTemplesIdList.length || filteredList.length == 0) {
            functions.logger.log("Nothing is changed so onUpdate returned");
            return;
        }
        // If somethings changed then 
        try {
            functions.logger.log("On Update was called ");
            // Make new list of temples
            let temples = newTemplesList.map((temple) => {
                return {
                    'place_id': temple['place_id'],
                    'address': temple['vicinity'] ? temple['vicinity'] : 'Not Available',
                    'name': temple['name'] ? temple['name'] : 'Not Available',
                    'latLng': {
                        'lat': temple.hasOwnProperty('geometry') ? temple['geometry']['location']['lat'] : 'Not Available', 'lon': temple.hasOwnProperty('geometry') ? temple['geometry']['location']['lng'] : 'Not Available',
                        'dateAdded': admin.firestore.Timestamp.now()
                    }
                }
            }
            );
            // use the current context id to update temples, no need to merge
            await db.collection('temples').doc(context.params.id).set({ 'palces_id_list': newTemplesIdList, temples: temples });
        }
        catch (e) { throw e; }
        return { 'status': 200 };
    }
    // return nothing
    return null;
});