(feat): enable searching by post id

src/Leges/PostType/LegesPostTypeServiceProvider.php

@@ -38,6 +38,8 @@ public function register()
     {
         $this->plugin->loader->addAction('init', $this, 'registerPostType');
 
+		$this->plugin->loader->addFilter("ext-cpts/{$this->postType}/filter-query/{$this->prefix}_post_id", $this, 'filterByPostId', 10, 3);
+
         if (class_exists('\WP_CLI')) {
             \WP_CLI::add_command('owc-update-leges', [UpdatePrices::class, 'execute'], ['shortdesc' => 'Update lege prices when specified date has been reached.']);
         }
@@ -117,8 +119,25 @@ public function registerPostType()
                     'date_format' => 'd M Y'
                 ],
             ],
+			'admin_filters' => [
+				"{$this->prefix}_post_id" => [
+					'title' => 'ID',
+					'meta_search_key' => '', // Use the "meta_search_key" type in order to generate a text input
+				],
+			],
         ];
 
         return register_extended_post_type($this->postType, $args, $labels);
     }
+
+	public function filterByPostId($return, $query, $filter): array
+	{
+		$postId = trim($query["{$this->prefix}_post_id"] ?? '');
+
+		if ($postId) {
+			$return['p'] = is_numeric($postId) ? (int)$postId : -1; // Non-numeric input should return no posts
+		}
+
+		return $return;
+	}
 }