feat: ✨ preliminary work on revised Post system

www/mysql_adapter.php

@@ -386,7 +386,8 @@ class MySQLAdapter {
 				
 		$post_data ??= ['found' => false];
 		$post_data['post_path'] = $post_path;
-		
+		$post_data['parent_path'] = dirname($post_path);
+
 		$post_data = $this->_normalize_post_data($post_data);
 		
 		if(!$post_data['found']) {
@@ -403,6 +404,19 @@ class MySQLAdapter {
 		return $post_data;
 	}
 
+	function get_markdown_for_id($id) {
+		$qry = "SELECT post_content
+		FROM posts
+		WHERE post_id = ? AND host = ?
+		";
+
+		$post_data = $this->_exec($qry, "is", $id, 
+			$this->SITE_CONFIG['HTTP_HOST']
+			)->fetch_assoc();
+
+		return $post_data['post_content'];
+	}
+
 	function get_subposts_by_path($path) {
 	    global $sql;