Item Upgrade Script

Description
The script enables an NPC to upgrade items the user have equipped (for now at least) through gossip. An success rate can be set to the upgrade process. The up-gradable item will not be consume on failure, however, the requirements will. The gossip has 4-5 menus.
1. Main Menu
2. Equipment slots.
3. Recipes / Upgrade Information
4. Upgrading Process / Remaining

The reason behind this script was learning C++, therefore improvements, that is code related, are highly appreciated. Features are also welcomed.

Details
The system consists of two files. The script itself and a .sql file to the database with two tables. The .sql file contains test data with commands to add them for trying it out.
When an item is up-gradable it may have multiple recipes, which the system will show to the user (the recipe menu). If it only has one, it goes straight to the requirements.

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Originally posted by Heitx