Added information about post space usage

src/Controllers/StaticPagesController.php

@@ -6,6 +6,7 @@ class StaticPagesController
 		$context = getContext();
 		$context->transport->postCount = PostModel::getCount();
 		$context->viewName = 'static-main';
+		$context->transport->postSpaceUsage = PostModel::getSpaceUsage();
 
 		PostModel::featureRandomPostIfNecessary();
 		$featuredPost = PostModel::getFeaturedPost();

src/Models/PostModel.php

@@ -313,6 +313,32 @@ final class PostModel extends AbstractCrudModel
 
 
 
+	public static function getSpaceUsage()
+	{
+		$unixTime = PropertyModel::get(PropertyModel::PostSpaceUsageUnixTime);
+		if (($unixTime !== null) and (time() - $unixTime < 24 * 60 * 60))
+			return PropertyModel::get(PropertyModel::PostSpaceUsage);
+
+		$totalBytes = 0;
+		$paths = [getConfig()->main->filesPath, getConfig()->main->thumbsPath];
+
+		foreach ($paths as $path)
+		{
+			$iterator =
+				new RecursiveIteratorIterator(
+				new RecursiveDirectoryIterator(
+					$path, FilesystemIterator::SKIP_DOTS));
+
+			foreach ($iterator as $object)
+				$totalBytes += $object->getSize();
+		}
+
+		PropertyModel::set(PropertyModel::PostSpaceUsage, $totalBytes);
+		PropertyModel::set(PropertyModel::PostSpaceUsageUnixTime, time());
+
+		return $totalBytes;
+	}
+
 	public static function getFeaturedPost()
 	{
 		$featuredPostId = PropertyModel::get(PropertyModel::FeaturedPostId);

src/Models/PropertyModel.php

@@ -8,6 +8,8 @@ final class PropertyModel implements IModel
 	const FeaturedPostUserName = 1;
 	const FeaturedPostUnixTime = 2;
 	const DbVersion = 3;
+	const PostSpaceUsage = 4;
+	const PostSpaceUsageUnixTime = 5;
 
 	static $allProperties;
 	static $loaded;

src/Views/static-main.phtml

@@ -6,7 +6,11 @@ Assets::addStylesheet('static-main.css');
 <div id="welcome">
 	<h1><?= getConfig()->main->title ?></h1>
 	<p>
-		<span>serving <?= $this->context->transport->postCount ?> posts</span>
+		<span>
+			<?php printf('serving %d posts (%s)',
+				$this->context->transport->postCount,
+				TextHelper::useBytesUnits($this->context->transport->postSpaceUsage)) ?>
+		</span>
 	</p>
 </div>