adds screentips to the janicart (pimpin' ride) (#223)

* adds screentips to the janicart (pimpin' ride) (#80665)

## About The Pull Request
Adds screentips the janicart (pimpin' ride) for dismounting, adding and
removing trash bags/upgrades/keys and inserting into the connected trash
bag.

The dismounting and key insertion/removal screentips could maybe be used
in the base vehicle. But right now I can't figure out how to move those
there without needing to do the same checks on the janicart (pimpin'
ride) again.
## Why It's Good For The Game
The janicart (pimpin' ride) has a lot of things you can do with it that
are not immediately obvious. It took me a while to figure out that you
can grab the trash bag from it without having to get off of it first.
## Changelog
:cl:
qol: added screentips to the janicart (pimpin' ride)
/:cl:

* adds screentips to the janicart (pimpin' ride)

---------

Co-authored-by: kawoppi <[email protected]>
Co-authored-by: NovaBot <[email protected]>

code/modules/vehicles/pimpin_ride.dm

@@ -14,6 +14,7 @@
 
 /obj/vehicle/ridden/janicart/Initialize(mapload)
 	. = ..()
+	register_context()
 	update_appearance()
 	AddElement(/datum/element/ridable, /datum/component/riding/vehicle/janicart)
 	GLOB.janitor_devices += src
@@ -85,6 +86,44 @@
 	if (!.)
 		try_remove_bag(user)
 
+/obj/vehicle/ridden/janicart/add_context(atom/source, list/context, obj/item/held_item, mob/user)
+	. = ..()
+
+	if(!held_item)
+		if(occupant_amount() > 0)
+			context[SCREENTIP_CONTEXT_LMB] = "Dismount"
+			context[SCREENTIP_CONTEXT_RMB] = "Dismount"
+			if(trash_bag)
+				context[SCREENTIP_CONTEXT_RMB] = "Remove trash bag"
+			if(is_key(inserted_key) && occupants.Find(user))
+				context[SCREENTIP_CONTEXT_ALT_LMB] = "Remove key"
+			return CONTEXTUAL_SCREENTIP_SET
+		else if(trash_bag)
+			context[SCREENTIP_CONTEXT_LMB] = "Remove trash bag"
+			context[SCREENTIP_CONTEXT_RMB] = "Remove trash bag"
+			return CONTEXTUAL_SCREENTIP_SET
+
+	if(istype(held_item, /obj/item/storage/bag/trash) && !trash_bag)
+		context[SCREENTIP_CONTEXT_LMB] = "Add trash bag"
+		context[SCREENTIP_CONTEXT_RMB] = "Add trash bag"
+		return CONTEXTUAL_SCREENTIP_SET
+
+	if(istype(held_item, /obj/item/janicart_upgrade) && !installed_upgrade)
+		context[SCREENTIP_CONTEXT_LMB] = "Install upgrade"
+		return CONTEXTUAL_SCREENTIP_SET
+
+	if(istype(held_item, /obj/item/screwdriver) && installed_upgrade)
+		context[SCREENTIP_CONTEXT_LMB] = "Remove upgrade"
+		return CONTEXTUAL_SCREENTIP_SET
+
+	if(is_key(held_item) && !is_key(inserted_key))
+		context[SCREENTIP_CONTEXT_LMB] = "Insert key"
+		context[SCREENTIP_CONTEXT_RMB] = "Insert key"
+		return CONTEXTUAL_SCREENTIP_SET
+	else if (trash_bag)
+		context[SCREENTIP_CONTEXT_LMB] = "Insert into trash bag"
+		context[SCREENTIP_CONTEXT_RMB] = "Insert into trash bag"
+		return CONTEXTUAL_SCREENTIP_SET
 
 /**
  * Called if the attached bag is being qdeleted, ensures appearance is maintained properly