Add language filter to server list

src/classes/Controllers/Web/Servers.php

@@ -2,7 +2,8 @@
 
 namespace Friendica\Directory\Controllers\Web;
 
-use \Friendica\Directory\Content\Pager;
+use Friendica\Directory\Content\Pager;
+use Friendica\Directory\Views\Widget\PopularServerLanguages;
 use PDO;
 use Slim\Http\Request;
 use Slim\Http\Response;
@@ -58,19 +59,32 @@ class Servers extends BaseController
 
 		$rc_version = str_replace('-dev', '-rc', $dev_version);
 
+		$popularLanguages = new PopularServerLanguages($this->atlas, $this->renderer);
+
 		$pager = new Pager($this->l10n, $request, 20);
 
+		$sql_where = '';
+		$values = [];
+
+		if ($args['language']) {
+			$sql_where .= '
+AND LEFT(`language`, 2) = LEFT(:language, 2)';
+			$values['language'] = $args['language'];
+		}
+
 		$stmt = 'SELECT *
 FROM `server` s
 WHERE `reg_policy` != "REGISTER_CLOSED"
 AND `available`
 AND NOT `hidden`
+' . $sql_where . '
 ORDER BY `health_score` DESC, `ssl_state` DESC, `info` != "" DESC, `last_seen` DESC
 LIMIT :start, :limit';
-		$servers = $this->atlas->fetchAll($stmt, [
+		$listValues = array_merge($values, [
 			'start' => [$pager->getStart(), PDO::PARAM_INT],
 			'limit' => [$pager->getItemsPerPage(), PDO::PARAM_INT]
 		]);
+		$servers = $this->atlas->fetchAll($stmt, $listValues);
 
 		foreach ($servers as $key => $server) {
 			$servers[$key]['user_count'] = $this->atlas->fetchValue(
@@ -83,16 +97,20 @@ LIMIT :start, :limit';
 FROM `server` s
 WHERE `reg_policy` != "REGISTER_CLOSED"
 AND `available`
-AND NOT `hidden`';
+AND NOT `hidden`
-		$count = $this->atlas->fetchValue($stmt);
+' . $sql_where;
+		$count = $this->atlas->fetchValue($stmt, $values);
 
 		$vars = [
 			'title' => $this->l10n->gettext('Public Servers'),
+			'total' => $count,
+			'language' => $args['language'],
 			'servers' => $servers,
 			'pager' => $pager->renderFull($count),
 			'stable_version' => $stable_version,
 			'rc_version' => $rc_version,
 			'dev_version' => $dev_version,
+			'popularLanguages' => $popularLanguages->render(),
 		];
 
 		$content = $this->renderer->fetch('servers.phtml', $vars);

src/routes.php

@@ -10,7 +10,7 @@ use Slim\Http\Response;
  */
 
 $app->get('/servers/surprise', \Friendica\Directory\Routes\Http\Surprise::class);
-$app->get('/servers', \Friendica\Directory\Routes\Web\Servers::class)->setName('servers');
+$app->get('/servers[/{language}]', \Friendica\Directory\Routes\Web\Servers::class)->setName('servers');
 
 $app->get('/search[/{account_type}]', function (Request $request, Response $response, $args) {
 	if ($request->getAttribute('negotiation')->getMediaType() == 'application/json') {

src/templates/servers.phtml

@@ -1,4 +1,9 @@
-<h1><?php echo $this->e($title) ?></h1>
+<h1><?php echo $this->e($title) ?> (<?php echo $this->e($total)?>)</h1>
+<?php if ($language):?>
+	<p><?php echo $this->__('Filtered by language:')?> <span class="badge badge-secondary"><?php echo $this->e(\Friendica\Directory\Utils\L10n::localeToLanguageString($language)) ?></span> <a href="<?php echo $this->r('servers')?>"><?php echo $this->__('Clear language filter')?></a></p>
+<?php else:?>
+<?php echo $popularLanguages?>
+<?php endif;?>
 <nav aria-label="<?php echo $this->__('Top servers pagination')?>">
 	<?php echo $this->fetch('sub/pager_full.phtml', $pager) ?>
 </nav>

src/templates/sub/server.phtml

@@ -41,10 +41,10 @@ $base_url_display = substr($base_url, strpos($base_url, '/') + 2);
                     <i class="fa fa-heartbeat"></i> <?php echo $server['health_score'] ?>
                 </span>
             <?php if ($server['language']):?>
-                <span class="badge badge-secondary" title="<?php echo $this->__('Default Language')?>">
+                <a href="<?php echo $this->r('servers', ['language' => $server['language']])?>" class="badge badge-secondary" title="<?php echo $this->__('Default Language')?>">
                     <i class="fa fa-language" alt="<?php echo $this->__('Default Language')?>"></i>
                     <?php echo $this->e(Friendica\Directory\Utils\L10n::localeToLanguageString($server['language'])) ?>
-                </span>
+                </a>
             <?php endif;?>
 	            <span class="badge badge-secondary" title="<?php echo $this->__('Known Users')?>">
                     <i class="fa fa-user"></i>