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App::Api.controllers do
  before do
    auth_user
  end
  get '/list/friends'
   {friends:['Joao','Maria','May']}.to_json
  end
end

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App::Api.controllers do
  before do
    auth_user
  end
  get '/me'
   {id:@user[:id],name:@user[:name],username:@user[:username]}.to_json
  end
end

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import { Platform, PermissionsAndroid } from 'react-native'
import { Constants, Permissions } from 'react-native-unimodules'
import NetInfo from "@react-native-community/netinfo";
import * as L from 'expo-location'

class Location {
  static getAsync = async () => {
    if (Platform.OS === 'android' && !Constants.isDevice) {
      throw new Exception('Geolocation only in devices not emulators.')
    }

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import { AsyncStorage } from 'react-native'
import Location from './Location.js'

class Backend {
  static get = async (url,params,callback) => {
    let p = ''
    params = (params ? params : {})
    const {location, status} = await Location.getAsync();
    if(!location)return;
    let endpoint = null

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Views.js
`````
import React from 'react'
import { NavigationContainer } from '@react-navigation/native'
import { createNativeStackNavigator } from '@react-navigation/native-stack'

const Stack = createNativeStackNavigator();


const options = (route,params) => {

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/*
  Those imports are to react-native-firebase and firebase storage. 
  
  If you use other client stuff, you must to replace the imports 
  by the include/imports of your languange
  or framework, as well as the respective calls.
*/
// START ----
import firebase from '@react-native-firebase/app'

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/*
  Esse é o entry point default do react-native App.js. Ele contém um AuthProvider que detecta sempre
  que o usuário estiver logado/deslogado para exibir a view correta. Views contém as views do usuário
  logado/deslogado.
*/

import React from 'react'
import {AuthProvider} from './AuthCtx'
import Views from './Views.js'

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/*
  1. require redis wrapper para executar open/close da conexão
  2. Setar sua conexão redis na URL, use uma ENV do seu servidor 
  para não armazenar usuário/senha hardcoded.
*/

const {redis} = require('./redis')

redis(async (client)=>{
  return Promise.all([

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/*
  yarn add express body-parser cors
  node index.js
*/

const express     = require('express')
const bodyParser  = require('body-parser')
const app         = express()
const cors        = require('cors');

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const set = new Set([1,1,2,2,3,3,4,4,5,5])
const array = Array.from(set)
console.log(array) //(5) [1, 2, 3, 4, 5]