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

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sha256 = Digest::SHA256.hexdigest "some key goes here you should generate yours"
HMAC_SECRET = sha256

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uricache = URI.parse(ENV["REDIS_URL"])
CACHE = Redis.new(:host => uricache.host, :port => uricache.port, :password => uricache.password)

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def auth_user user=nil
  #token = JWT.decode(params[:token], hmac_secret, true, { :algorithm => 'HS256' })
  token = request.env["HTTP_TOKEN"]

  halt 401, "token + user are nil" if (token.blank? && user.blank?)

  @user ||= CACHE.get(token)

  unless @user.blank?
    halt 400, "existent user for a blank token" if token.blank?

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import React, { Component } from 'react';
import Date from require('./components/Date.js')


export default class App extends Component {
  initAsync = async (that) => {
  }

  constructor(props) {
   super(props)