Cached External Content

Cached External Content

Create model Api

nano app/WeatherApi.php

<?php

namespace App;

use Cache;
use Carbon\Carbon;

class WeatherApi
{

    public function data()
    {
        return Cache::get('Weather.reads') ?: $this->update();
    }

    public function update($urlApi = null)
    {
        if (is_null($urlApi)) {
            $urlApi = 'https://api.openweathermap.org/data/2.5/weather?q=Sao%20Paulo,br&units=metric&APPID=' . getenv('WEATHER_APPID');
        }

        $json = file_get_contents($urlApi);
        $response = json_decode($json);
        $data = $response->main;
        $data->updated_at = Carbon::now()->toDateTimeString();

        Cache::forever('Weather.reads', $data);

        return $data;
    }
}

Generate weather service provider

php artisan make:provider WeatherProvider

Add api data in the partial

nano app/Providers/WeatherProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use App\WeatherApi;

class WeatherProvider extends ServiceProvider
{
    public function boot()
    {
        view()->composer('shared.nav', function ($view) {
            $data = (new WeatherApi)->data();
            $view->with('weather', $data);
        });
    }
    ...
}

Add weather service provider in the app

nano config/app.php

'providers' => [
        ...
        App\Providers\WeatherProvider::class,
    ],

Change weather placeholder to use PHP array

nano resources/views/shared/nav.blade.php

<li class="navbar-text">
    Sao Paulo: {{ $weather->temp }} Celsius.
    Last update {{ $weather->updated_at }}
</li>

Comment out load weather by ajax

nano resources/assets/js/loadRemoteContent.js

...
//$(function() {
//    loadWeather();
//});

gulp

Generate command to update weather

php artisan make:console WeatherUpdate --command=weather:update

Update description and call WeatherApi

nano app/Console/Commands/WeatherUpdate.php

<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use App\WeatherApi;

class WeatherUpdate extends Command
{
    ...

    protected $description = 'Update weather data.';

    ...

    public function handle()
    {
        $api = new WeatherApi;
        $data = $api->update();
        echo json_encode($data) . PHP_EOL;
    }
}

Schedule weather update command

nano app/Console/Kernel.php

<?php
...
class Kernel extends ConsoleKernel
{
    protected $commands = [
        ...
        \App\Console\Commands\WeatherUpdate::class,
    ];

    protected function schedule(Schedule $schedule)
    {
        ...
        $schedule->command('weather:update')
                 ->hourly();
    }
}

Test weather update

php artisan weather:update

{"temp":20.54,"pressure":1020,"humidity":72,"temp_min":20,"temp_max":21,"updated_at":"2015-07-07 17:41:04"}

Start the server

php artisan serve

Open any page in the browser and check for weather info

open http://localhost:8000

Set redis as default cache driver on envioriment variables and set WEATHER_APPID

nano .env

CACHE_DRIVER=redis
...
WEATHER_APPID=YOUR_WEATHER_APPID

Run redis server

redis-server

Restart the server

php artisan serve

Check again

open http://localhost:8000

Add cached external content to Git

git add .
git commit -m "Add cached external content"

Next step: Tests Setup