Addng some comments

item.php

@@ -2,11 +2,13 @@
 
 class Item implements JsonSerializable
 {
-
-    // TODO: create a persist() method that updates the line if the offset where
+    // TODO: Create a persist() method that updates the line if the offset where
     //       it originally existed in is given by 'ftell'. If it doesn't have an
     //       ID, then try to find it in the file and if it doesn't exist, append
     //
+    // TODO: Mantain ":" between tags and subtags that can multiple subtags, use
+    //       another character ("="?) to signal that it should be unique
+    //
     // TODO: Maybe implement tags as an associative array or somethign?
     //
     // TODO: Change to id here in all occurrences
@@ -23,6 +25,7 @@ class Item implements JsonSerializable
         $db->map(function ($line) use (&$ret, $id) {
             if ($line[0] == $id) {
                 $ret = Item::fromLine($line);
+
                 return true;
             }
 
@@ -48,6 +51,9 @@ class Item implements JsonSerializable
     {
         $from_path = $php_file['tmp_name'] ?? null;
 
+        // TODO: If any step fails, nothing should be actually written to the
+        //       media file or the image copied. Maybe revert the changes?
+
         // --- CHECKS ---
         if (!is_string($from_path))
             Json::error('Passed invalid upload structure')->die();