Added FetchCommand to grab all the resources informations from getgrav.org and cache it for a day

bin/gpm

@@ -21,5 +21,7 @@ if (!file_exists(ROOT_DIR . 'index.php')) {
 $grav = Grav::instance(['loader' => $autoload]);
 
 $app = new Application('Grav Package Manager', '0.1.0');
-$app->addCommands(array());
+$app->addCommands(array(
+    new \Grav\Console\Gpm\FetchCommand($grav),
+));
 $app->run();

system/src/Grav/Console/Gpm/FetchCommand.php

@@ -0,0 +1,136 @@
+<?php
+namespace Grav\Console\Gpm;
+
+use Grav\Common\Grav;
+use Grav\Common\Cache;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Formatter\OutputFormatterStyle;
+use Symfony\Component\Console\Helper\ProgressBar;
+
+class FetchCommand extends Command {
+
+    protected $input;
+    protected $output;
+    protected $cache;
+    protected $argv;
+    protected $progress;
+    protected $repository = 'http://rt.djamil.it/grav-site/downloads';//'http://getgrav.org/downloads';
+    protected $pkg_types = array('plugins', 'themes');
+
+    public function __construct(Grav $grav){
+        $this->grav = $grav;
+
+        // just for the gpm cli we force the filesystem driver cache
+        $this->grav['config']->set('system.cache.driver', 'default');
+        $this->cache = $this->grav['cache']->fetch(md5('cli:gpm'));
+
+        parent::__construct();
+    }
+
+    protected function configure() {
+        $this
+        ->setName("fetch")
+        ->addOption(
+            'force',
+            'f',
+            InputOption::VALUE_NONE,
+            'Force fetching the new data remotely'
+        )
+        ->setDescription("Fetches the data for plugins and themes available")
+        ->setHelp('The <info>fetch</info> command downloads the list of plugins and themes available');
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $this->input  = $input;
+        $this->output = $output;
+
+        $this->setColors();
+        $this->fetch($this->output);
+    }
+
+    private function fetch()
+    {
+        if (!$this->cache || $this->input->getOption('force')){
+            $data = $this->fetch_data();
+            $date = new \DateTime();
+            $this->grav['cache']->save(md5('cli:gpm'), $data, 86400);
+            $date = $date->modify('+1 day')->format('D, d M Y H:i:s');
+            $this->cache = $data;
+            $this->output->writeln("Data cached until <cyan>".$date."</cyan>\n");
+        }
+    }
+
+    private function fetch_data()
+    {
+        $this->output->writeln("");
+        $this->output->writeln('Fetching data from <cyan>getgrav.org</cyan>');
+        $this->output->writeln("");
+        $curl = $this->getCurl();
+        $response = array();
+
+        $this->progress = new ProgressBar($this->output, count($this->pkg_types));
+        $this->progress->setFormat("<normal>%message%</normal>\n<cyan>%current%</cyan><normal>/</normal><cyan>%max%</cyan> <white>[%bar%]</white> <green>%percent:3s%%</green>");
+        //$progress->setFormat('Downloading <cyan>%current%</cyan> files [<green>%bar%</green>] %elapsed:6s% %memory:6s%');
+
+        $this->progress->setMessage('Task in progress');
+        $this->progress->start();
+        foreach($this->pkg_types as $pkg_type) {
+            $this->progress->setMessage('Fetching "'.$pkg_type.'"...');
+            $url = $this->repository . '/' . $pkg_type . '.json';
+
+            curl_setopt($curl, CURLOPT_URL, $url);
+            $response[$pkg_type] = curl_exec($curl);
+
+            $this->progress->advance();
+        }
+
+        curl_close($curl);
+        $this->progress->setMessage("Fetch completed");
+        $this->progress->finish();
+        $this->output->writeln("");
+
+        return $response;
+    }
+
+    private function setColors()
+    {
+        $this->output->getFormatter()->setStyle('normal', new OutputFormatterStyle('white'));
+        $this->output->getFormatter()->setStyle('red', new OutputFormatterStyle('red', null, array('bold')));
+        $this->output->getFormatter()->setStyle('cyan', new OutputFormatterStyle('cyan', null, array('bold')));
+        $this->output->getFormatter()->setStyle('green', new OutputFormatterStyle('green', null, array('bold')));
+        $this->output->getFormatter()->setStyle('magenta', new OutputFormatterStyle('magenta', null, array('bold')));
+        $this->output->getFormatter()->setStyle('white', new OutputFormatterStyle('white', null, array('bold')));
+    }
+
+    private function getCurl($progress = false)
+    {
+        $curl = curl_init();
+
+        curl_setopt($curl, CURLOPT_REFERER, 'Grav GPM v'.GRAV_VERSION);
+        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+        curl_setopt($curl, CURLOPT_USERAGENT, 'Grav GPM v'.GRAV_VERSION);
+        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
+
+        if ($progress)
+        {
+            curl_setopt($curl, CURLOPT_NOPROGRESS, false);
+            curl_setopt($curl, CURLOPT_HEADER, 1);
+            curl_setopt($curl, CURLOPT_PROGRESSFUNCTION, array($this, 'progress'));
+        }
+
+        return $curl;
+    }
+
+    private function progress($download_size, $downloaded)
+    {
+        if ($download_size > 0)
+        {
+            $this->output->writeln($downloaded / $download_size  * 100);
+        }
+    }
+}