Develop Reference

Cloud function sending json as map

I am sending json to cloud function via postman and it works fine, how can I send same json as map to cloud function:
Sending via postman:
{
"data": {
"users": [
{
"phone": "55512345"
},
{
"phone": "972525276676"
},
{
"phone": "55512347"
}
]
}
}
Sending via android:
private fun addMessage(): Task<String>? {
val usr1 = User("55512345")
val usr2 = User("972525276676")
val usr3 = User("55512347")
val userList = listOf(usr1,usr2,usr3)
val data: MutableMap<String, Any> = HashMap()
data["users"] = userList
functions.getHttpsCallable("getUsers")
.call(data)
.addOnFailureListener {
Log.d("DTAG", it.toString())
}
.addOnSuccessListener {
Log.d("DTAG","Ok: ${it.data.toString()}")
}
return null
}
Where user is:
data class User(var phone:String)
Cloud function:
exports.getUsers = functions.https.onRequest(async (request, response) => {
const data = request.body.data;
if (data !== null && data.users !== null) {
const users = data.users;
const phonelist = users.map(user => user.phone.toString());
const userlist = []
const snapshot = await db.collection("users").get()
snapshot.docs.forEach((userDoc) => {
const phone = userDoc.get("phone")
if(phone === null) return;
const isContain = phonelist.reduce((acc, num) => acc || phone.includes(num), false)
if(isContain) {
userlist.push(userDoc.data())
}
})
response.status(200).json({result: userlist})
} else{
response.sendStatus(403)
}
});
Error:
Object cannot be encoded in JSON: User(phone=55512345)

The error is telling you that the client SDK doesn't know what to do with the User class. You'll have to build a Map<String, Object> out of the data.
val userMap1 = mapOf("phone" to "55512345")
...
val userList = listOf(userMap1, ...)

React Native BLE Manager (Android) status code 14 on write to characteristic

I'm using the react native ble manager package to build a react native app that communicates with a python client over BLE.
When writing to a characteristic on Android (this bug does not seem to appear on IOS) the write is successful but shortly after it I receive this error:
ERROR Error writing eeee2a38-0000-1000-8000-00805f9b34fb status=14
This is the simplified code that handles connecting, notifications and writing on the Android side:
import { NativeModules, NativeEventEmitter, Platform } from 'react-native'
import BleManager, { Peripheral } from 'react-native-ble-manager'
import { END } from 'redux-saga'
import { bytesToString } from 'convert-string'
const UPDATE_SERVICE_UUID = '0000180d-aaaa-1000-8000-00805f9b34fb'
export const Characteristic =
{
WIFI_STATUS_UUID: 'bbbb2a38-0000-1000-8000-00805f9b34fb',
WIFI_CREDS_UUID: 'aaaa2a38-0000-1000-8000-00805f9b34fb',
VERSION_UUID: 'cccc2a38-0000-1000-8000-00805f9b34fb',
UPDATE_STATUS_UUID: 'dddd2a38-0000-1000-8000-00805f9b34fb',
DO_UPDATE_UUID: 'eeee2a38-0000-1000-8000-00805f9b34fb',
ERROR_UUID: 'ffff2a38-0000-1000-8000-00805f9b34fb',
}
class BLEManager {
bleManagerModule: any
bleManagerEmitter: any
scanning: boolean
dispatch: any
stopScanListener: any
peripheralDiscoverListener: any
characteristicUpdateListener: any
onDisconnectListener: any
connectTimeout: any
constructor() {
BleManager.start({ showAlert: false })
this.bleManagerModule = NativeModules.BleManager
this.bleManagerEmitter = new NativeEventEmitter(this.bleManagerModule)
this.scanning = false
}
startScan = (onPeripheralFound: (peripheral: Peripheral | null) => void) => {
if (!this.scanning) {
BleManager.scan([], 3, true)
.then(() => {
console.log('Scanning...')
this.scanning = true
this.peripheralDiscoverListener = this.bleManagerEmitter.addListener(
'BleManagerDiscoverPeripheral',
onPeripheralFound,
)
this.stopScanListener = this.bleManagerEmitter.addListener(
'BleManagerStopScan',
() => {
onPeripheralFound(END)
},
)
return
})
.catch(err => {
console.error(err)
})
} else {
console.log('already scanning')
}
return () => {
console.log('stopped scanning')
this.peripheralDiscoverListener.remove()
this.stopScanListener.remove()
}
}
getBondedDevices = (onGetBondedPeripherals: any) => {
BleManager.getBondedPeripherals().then(bondedPeripheralsArray => {
onGetBondedPeripherals(bondedPeripheralsArray)
// TODO: is the END message here necessary?
onGetBondedPeripherals(END)
return
})
return () => {}
}
connectToPeripheral = async (peripheralID: string) => {
try {
await new Promise(async (resolve, reject) => {
this.connectTimeout = setTimeout(reject, 3000)
console.log('connecting to ' + peripheralID)
try {
await BleManager.connect(peripheralID)
await BleManager.retrieveServices(peripheralID)
} catch (error) {
reject()
}
if (this.connectTimeout) {
clearTimeout(this.connectTimeout)
this.connectTimeout = null
this.onDisconnectListener = this.bleManagerEmitter.addListener(
'BleManagerDisconnectPeripheral',
this.onDisconnectPeripheral,
)
resolve()
}
})
} catch (err) {
clearTimeout(this.connectTimeout)
this.connectTimeout = null
console.error('Could not connect to device.')
throw new Error(err)
}
return
}
watchForCharacteristicsUpdates = async (
updateCharValue: (arg0: { payload: any }) => void,
peripheralID: string,
) => {
try {
await BleManager.startNotification(
peripheralID,
UPDATE_SERVICE_UUID,
Characteristic.ERROR_UUID,
)
await BleManager.startNotification(
peripheralID,
UPDATE_SERVICE_UUID,
Characteristic.VERSION_UUID,
)
await BleManager.startNotification(
peripheralID,
UPDATE_SERVICE_UUID,
Characteristic.UPDATE_STATUS_UUID,
)
} catch (e) {
updateCharValue(new Error(e))
console.error(e)
}
console.log('watch for notifications')
this.characteristicUpdateListener = this.bleManagerEmitter.addListener(
'BleManagerDidUpdateValueForCharacteristic',
({ value, characteristic }) => {
// Convert bytes array to string
const data = bytesToString(value)
console.log(
`Received ${data} (${value}) for characteristic ${characteristic}`,
)
updateCharValue({
payload: {
characteristic: characteristic,
data: data,
},
})
},
)
}
disconnectFromPeripheral = async (peripheralID: string) => {
await BleManager.disconnect(peripheralID)
this.characteristicUpdateListener.remove()
}
onDisconnectPeripheral = (peripheralID: string) => {
console.log(peripheralID + ' disconnected')
this.onDisconnectListener.remove()
}
checkIfConnected = async (peripheralID: string) => {
return await BleManager.isPeripheralConnected(peripheralID, [])
}
triggerUpdateCheck = async (peripheralID: string) => {
return await BleManager.write(
peripheralID,
UPDATE_SERVICE_UUID,
Characteristic.WIFI_STATUS_UUID,
[1],
)
}
runUpdate = async (peripheralID: string) => {
return await BleManager.write(
peripheralID,
UPDATE_SERVICE_UUID,
Characteristic.DO_UPDATE_UUID,
[1],
)
}
}
const bleManager = new BLEManager()
export default bleManager
I've researched this a bit and it seems that some people have the problem but I could not find an explanation or solution to it.
I'm even unsure where to start debugging. Any suggestions are welcome.
Details:
Device: [Pixel 6]
OS: [Android 12]
react-native-ble-manager version: ^8.4.1
react-native version: 0.67.4
Note: I've also asked this question on Github: https://github.com/innoveit/react-native-ble-manager/issues/887

The problem (as mentioned by Martijn) was the bug in Bluez which is fixed in 5.65. Simply upgrading and clearing the Bluetooth cache fixed it.

Passing custom object through method channel flutter

I am trying to pass a custom object which is of type User from native platform to Flutter. The User class is part of a library and not accessible directly for editing. Here is my android and iOS code implementation for the same. Problem is I am not able to find a solution on how to pass this object through method channels in such a way that I can parse it in the Dart code easily.
Android part:
private fun loginUser(uid: String, apiKey: String, result: MethodChannel.Result) {
MyChat.login(uid, apiKey, object : MyChat.CallbackListener<User>() {
override fun onSuccess(user: User) {
Log.e(TAG, user.toString())
result.success(hashMapOf("RESULT" to true, "AVATAR" to user.avatar,
"CREDITS" to user.credits,
"EMAIL" to user.email,
"LAST_ACTIVE" to user.lastActiveAt,
"NAME" to user.name,
"ROLE" to user.role,
"STATUS" to user.status,
"STATUS_MESSAGE" to user.statusMessage).toString())
}
override fun onError(p0: MyChatException?) {
Log.e(TAG, p0?.message)
result.error("FAILED", "Unable to create login", null)
}
})
}
iOS implementation:
func loginUser(result: #escaping FlutterResult, uid: String, apiKey: String){
MyChat.login(UID: uid, apiKey: apiKey, onSuccess: { (user) in
// Login Successful
let data: [String: Any] = ["RESULT":true,
"AVATAR":user.avatar!,
"CREDITS": user.credits,
"EMAIL": user.email!,
"LAST_ACTIVE":String(user.lastActiveAt),
"NAME":user.name!,
"ROLE":user.role!,
"STATUS":user.status.rawValue,
"STATUS_MESSAGE":user.statusMessage]
let jsonData = try? JSONSerialization.data(withJSONObject: data, options: [.prettyPrinted])
result(String(data: jsonData!, encoding: .ascii))
}) { (error) in
// Login error
result(FlutterError(code: "FAILED", message:"Login failed with exception: " + error.errorDescription, details: nil))
}
}
My dart code:
Future<String> isUserLoggedIn() async {
String status = "";
try {
final String result = await platform
.invokeMethod('loginUser', {"UID": UID, "API_KEY": API_KEY});
print(result); //How to parse?
status = "Hello";
} on PlatformException catch (e) {
print("Exception");
status = e.message;
}
return status;
}

You can pass data in hash map.
In Android:
result.success(hashMapOf(
"CREDITS" to user.credits,
"EMAIL" to user.email,
...
))
In iOS:
let data: [String: Any] = [...]
result(data)
In Flutter:
final result = await platform.invokeMethod<Map<String, dynamic>>('loginUser', ...);
final credits = result['CREDITS'] as String;
final email = result['EMAIL'] as String;
...

you can use invokeMapMethod which is an implementation of invokeMethod that can return typed maps.
like this :
final result = await platform.invokeMapMethod('loginUser', ...);
or you can pass json object as string like that :
in android
platform.success(
"{\"CREDITS\":\"${user.credits}\",\"EMAIL\":\"${user.email}\",\"LAST_ACTIVE\":\"${user.lastActiveAt}\"}"
)
in flutter
var result = await methodChannel.invokeMethod('loginUser' , '');
var json = json.decode(result);
var credit = json['CREDITS'];
var email = json['EMAIL'];
var lastActive = json['LAST_ACTIVE'];

Firebase cloud function gets triggered twice. First time 'error', second time 'ok'

Just trying to impletment Stripe Payment into my Android App.
The trouble i have is that my cloud function is triggered twice when i enter a credit card in my app. the first trigger returns an "error" status and the second trigger returns an "ok" status
Here is the code i use to save the Stripe token to my firebase realtime database:
if (cardToSave != null) {
stripe.createToken(
cardToSave,
object:TokenCallback {
override fun onSuccess(token: Token?) {
val currentUser = FirebaseAuth.getInstance().currentUser?.uid
val database = FirebaseDatabase.getInstance()
val pushId = database.getReference("stripe_customers/$currentUser/sources/").push().key
val ref = database.getReference("stripe_customers/$currentUser/sources/$pushId/token/")
//save the token id from the "token" object we received from Stripe
ref.setValue(token?.id)
.addOnSuccessListener {
Log.d(TAG, "Added Stripe Token to database successfully")
}
.addOnFailureListener {
Log.d(TAG, "Failed to add Token to database")
}
}
...
Here is the cloud function i copied straight from Stripe's example in their github repo:
// Add a payment source (card) for a user by writing a stripe payment source token to Realtime database
exports.addPaymentSource = functions.database
.ref('/stripe_customers/{userId}/sources/{pushId}/token').onWrite((change, context) => {
const source = change.after.val();
if (source === null){
return null;
}
return admin.database().ref(`/stripe_customers/${context.params.userId}/customer_id`)
.once('value').then((snapshot) => {
return snapshot.val();
}).then((customer) => {
return stripe.customers.createSource(customer, {source});
}).then((response) => {
return change.after.ref.parent.set(response);
}, (error) => {
return change.after.ref.parent.child('error').set(userFacingMessage(error));
}).then(() => {
return reportError(error, {user: context.params.userId});
});
});
Any help would be appreciated!
EDIT:
index.js
'use strict';
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp();
const logging = require('#google-cloud/logging');
//functions.config() is firebase's environment variables
const stripe = require('stripe')(functions.config().stripe.token);
const currency = functions.config().stripe.currency || 'USD';
// [START chargecustomer]
// Charge the Stripe customer whenever an amount is written to the Realtime database
exports.createStripeCharge = functions.database.ref('/stripe_customers/{userId}/charges/{id}')
.onCreate((snap, context) => {
const val = snap.val();
// Look up the Stripe customer id written in createStripeCustomer
return admin.database().ref(`/stripe_customers/${context.params.userId}/customer_id`)
.once('value').then((snapshot) => {
return snapshot.val();
}).then((customer) => {
// Create a charge using the pushId as the idempotency key
// protecting against double charges
const amount = val.amount;
const idempotencyKey = context.params.id;
const charge = {amount, currency, customer};
if (val.source !== null) {
charge.source = val.source;
}
return stripe.charges.create(charge, {idempotency_key: idempotencyKey});
}).then((response) => {
// If the result is successful, write it back to the database
return snap.ref.set(response);
}).catch((error) => {
// We want to capture errors and render them in a user-friendly way, while
// still logging an exception with StackDriver
return snap.ref.child('error').set(userFacingMessage(error));
}).then(() => {
return reportError(error, {user: context.params.userId});
});
});
// [END chargecustomer]]
// When a user is created, register them with Stripe
exports.createStripeCustomer = functions.auth.user().onCreate((user) => {
return stripe.customers.create({
email: user.email,
}).then((customer) => {
return admin.database().ref(`/stripe_customers/${user.uid}/customer_id`).set(customer.id);
});
});
// Add a payment source (card) for a user by writing a stripe payment source token to Realtime database
exports.addPaymentSource = functions.database
.ref('/stripe_customers/{userId}/sources/{pushId}/token').onWrite((change, context) => {
const source = change.after.val();
if (source === null){
return null;
}
return admin.database().ref(`/stripe_customers/${context.params.userId}/customer_id`)
.once('value').then((snapshot) => {
return snapshot.val();
}).then((customer) => {
return stripe.customers.createSource(customer, {source:source});
}).then((response) => {
return change.after.ref.parent.set(response);
}, (error) => {
return change.after.ref.parent.child('error').set(userFacingMessage(error));
}).then(() => {
return reportError(error, {user: context.params.userId});
});
});
// When a user deletes their account, clean up after them
exports.cleanupUser = functions.auth.user().onDelete((user) => {
return admin.database().ref(`/stripe_customers/${user.uid}`).once('value').then(
(snapshot) => {
return snapshot.val();
}).then((customer) => {
return stripe.customers.del(customer.customer_id);
}).then(() => {
return admin.database().ref(`/stripe_customers/${user.uid}`).remove();
});
});
// To keep on top of errors, we should raise a verbose error report with Stackdriver rather
// than simply relying on console.error. This will calculate users affected + send you email
// alerts, if you've opted into receiving them.
// [START reporterror]
function reportError(err, context = {}) {
// This is the name of the StackDriver log stream that will receive the log
// entry. This name can be any valid log stream name, but must contain "err"
// in order for the error to be picked up by StackDriver Error Reporting.
const logName = 'errors';
const log = logging.log(logName);
// https://cloud.google.com/logging/docs/api/ref_v2beta1/rest/v2beta1/MonitoredResource
const metadata = {
resource: {
type: 'cloud_function',
labels: {function_name: process.env.FUNCTION_NAME},
},
};
// https://cloud.google.com/error-reporting/reference/rest/v1beta1/ErrorEvent
const errorEvent = {
message: err.stack,
serviceContext: {
service: process.env.FUNCTION_NAME,
resourceType: 'cloud_function',
},
context: context,
};
// Write the error log entry
return new Promise((resolve, reject) => {
log.write(log.entry(metadata, errorEvent), (error) => {
if (error) {
return reject(error);
}
return resolve();
});
});
}
// [END reporterror]
// Sanitize the error message for the user
function userFacingMessage(error) {
return error.type ? error.message : 'An error occurred, developers have been alerted';
}

How to pass a value between factorys in Ionic?

I need yours help.
I have two .factory's in Services.js
The first .factory works with a database, the second .factory with e-mail, files and so on.
How to pass a value from first factory to second? How to select data from the first factory?
//first factory
angular.module('starter.services', ['ngCordova', 'ngSanitize', 'ngCsv'])
.factory('NotesDataService', function ($cordovaSQLite, $ionicPlatform) {
var db, dbName = "CONTACTS_DB"
function useWebSql() {
db = window.openDatabase(dbName, "1.0", "Contacts database", 200000)
console.info('Using webSql')
}
function useSqlLite() {
db = $cordovaSQLite.openDB({name: dbName, location : 1})
console.info('Using SQLITE')
}
function initDatabase(){
$cordovaSQLite.execute(db, 'CREATE TABLE IF NOT EXISTS T_CONTACTS (id integer primary key, nom, prenom, codePostale, ville, email, portable)')
.then(function(res){
}, onErrorQuery)
}
$ionicPlatform.ready(function () {
if(window.cordova){
useSqlLite()
} else {
useWebSql()
}
initDatabase()
})
function onErrorQuery(err){
console.error(err)
}
return{
getAll: function(callback){
$ionicPlatform.ready(function () {
$cordovaSQLite.execute(db, 'SELECT * FROM T_CONTACTS').then(function (results) {
var data = []
for (i = 0, max = results.rows.length; i < max; i++) {
data.push(results.rows.item(i))
}
callback(data)
}, onErrorQuery)
})
}})
//second factory, here I need to get data from first factory
//to create a text file with the data from the database
// and attach this file to the e-mail
.factory('ContactsService', function ($ionicPlatform, $cordovaEmailComposer, $cordovaSQLite, $cordovaFile, NotesDataService) {
$ionicPlatform.ready(function () {
initCordovaEmailComposer();
})
function initCordovaEmailComposer() {
$cordovaEmailComposer.isAvailable().then(function () {
//is available
alert('avaible');
}, function () {
//not available
alert('not available');
})
}
return {
createEmail: function () {
var email = {
to: 'test#gmail.com',
cc: 'test#gmail.com',
bcc: 'test#gmail.com',
attachments: [
'file://cordova.file.externalDataDirectory/contacts.txt',
],
subject: 'Cordova Icons',
body: "Hello, mon ami",
isHtml: true
};
$cordovaEmailComposer.open(email).then(null, function () {
});
},
debugMessage: function (data) {
console.log('debug message', data);
},
createFile: function () {
var fileContacts = document.addEventListener('deviceready', function () {
NotesDataService.getAll(function (data) {
console.log(data)
return data
})
console.log('file contacts in console: ',fileContacts)
var fileName = 'contacts.txt'
var fileText = fileContacts
var filePath = cordova.file.externalDataDirectory
//CHECK file
$cordovaFile.checkFile(filePath, fileName).then(function (success) {
alert("file exist")
}, function (error) {
alert("file not exist", filePath)
//WRITE NEW FILE
$cordovaFile.writeFile(cordova.file.externalDataDirectory, fileName, fileText, true).then(function (success) {
// success
}, function (error) {
// error
});
});
})
},
}
})
Thank you all for your advice and support

Inject these factories into one another :
.factory('NotesDataService',['$cordovaSQLite','$ionicPlatform','ContactsService', function ($cordovaSQLite, $ionicPlatform,ContactsService) ....
.factory('ContactsService',['$ionicPlatform',.....,'NotesDataService', function ($ionicPlatform, $cordovaEmailComposer, $cordovaSQLite, $cordovaFile, NotesDataService) {
Now you can use either factory variables and functions in other factory.