Add site method to get a list of asset filenames via a hook.

index.php

@@ -14,6 +14,55 @@
 Kirby::plugin(
 	name: "hobbyhome/library",
 	extends: [
+		"options" => [
+			"assets" => [
+				"css" => [
+					# 100 => Url::path(kirby()->url("media") . "/plugins/hobbyhome/library/css/example.css", true),
+				],
+			],
+		],
+		"hooks" => [
+			/**
+			 * To add this hook to a plugin, change the option() call to use the plugins name.
+			 * 
+			 * @version 1.0
+			 */
+			"hobbyhome.getAssets" => function ($files = [], $type = "css") {
+				foreach (option("hobbyhome.library.assets.{$type}", []) as $order => $file) {
+					# Make sure no other file exists with the current sort order index.
+					while (isset($files[$order])) {
+						$order++;
+					}
+
+					$files[$order] = $file;
+				}
+
+				return $files;
+			},
+		],
+		"siteMethods" => [
+			/**
+			 * Fetch and sort a list of asset filenames.
+			 * 
+			 * @param string $type The type of asset filenames to fetch.
+			 * 
+			 * @return Array of asset filenames, sorted by index.
+			 */
+			"getAssets" => function ($type = "css") {
+				$hookFiles = kirby()->apply("hobbyhome.getAssets", ["files" => [], "type" => $type], "files");
+				$files = [];
+
+				foreach ($hookFiles as $order => $file) {
+					# If file exists, add MD5 query string to attempt to cache bust it.
+					$md5 = F::exists(kirby()->root() . $file) ? md5_file(kirby()->root() . $file) : "";
+					$files[$order] = url($file, ["query" => ["md5" => $md5]]);
+				}
+
+				ksort($files, SORT_NUMERIC);
+
+				return $files;
+			},
+		],
 	],
 	info: [
 		"authors" => [[