[Chapter 66] Tooltip bug on casting a targeted spell

[PierreGuyot]

rustrogueliketutorial/chapter-66-spells/src/inventory_system/mod.rs

Line 41 in 33872fe

"Nameless item (bug)".to_string()

rustrogueliketutorial/chapter-66-spells/src/gui.rs

Line 51 in 33872fe

"Nameless item (bug)".to_string()

When casting a targeted spell (like Zap), a tooltip will be displayed with the Nameless item (bug) string.

This is because the tooltip logic will loop on every entity with a Position component and try to display it.
However, when spawning a Particle, it is expected for it to have a Position but no Name.
When casting the spell, a Particle is spawned on the exact tile the player is hovering, so the draw_tooltips logic catches it and tries to display it. But since it has no Name (which is expected), it displays this string.

We need to either:

1. Filter entities we pass to get_item_display_name differently so particles are omitted
2. Return None for an entity with no Name component

Additionally, the code for get_item_display_name and obfuscate_name should be refactored to avoid bugs.
(get_item_display_name could simply get the proper stores and call obfuscate_name.)