You can no longer phase through a flipped table. (#3284)

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## About The Pull Request

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Flipped tables had an issue where they didnt block movement properly
from it's outward side, or it's inward if you flipped it while diagonal.

Adds an extra proc to help check the directions and fixes the other
checks so people can't occasionally phase directly through a flipped
table.
Also adds an examine hint to flipped tables on how to right them, and
changes the span classes to macros
## Why It's Good For The Game

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benefit the game. If you can't justify it in words, it might not be
worth adding. -->
Bugfixes are good.

## Changelog

:cl:
add: Examine hints for flipped tables
fix: You can no longer phase through a flipped table.
/:cl:

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code/game/objects/structures/table_flipped.dm

@@ -17,10 +17,22 @@
 
 	AddElement(/datum/element/connect_loc, loc_connections)
 
+/obj/structure/flippedtable/examine(mob/user)
+	. = ..()
+	. += span_notice("You could right the [name] by control shift-clicking it.")
+
+/obj/structure/flippedtable/proc/check_dir()
+	if(dir == NORTHEAST || dir == SOUTHEAST)
+		return EAST
+	if(dir == NORTHWEST || dir == SOUTHWEST)
+		return WEST
+	return dir
+
 /obj/structure/flippedtable/CanAllowThrough(atom/movable/mover, turf/target)
 	. = ..()
-	var/attempted_dir = get_dir(loc, target)
-	if(table_type == /obj/structure/table/glass) //Glass table, jolly ranchers pass
+	var/table_dir = check_dir()
+	var/attempted_dir = get_dir(loc, mover)
+	if(table_type == /obj/structure/table/glass) //Glass table, lasers can pass
 		if(istype(mover) && (mover.pass_flags & PASSGLASS))
 			return TRUE
 	if(istype(mover, /obj/projectile))
@@ -29,20 +41,20 @@
 		if(proj_obj.trajectory && angle2dir_cardinal(proj_obj.trajectory.angle) == dir)
 			return TRUE
 		return FALSE
-	return attempted_dir != dir
+	return attempted_dir != table_dir
 
 /obj/structure/flippedtable/proc/on_exit(datum/source, atom/movable/exiter, direction)
 	SIGNAL_HANDLER
-
+	var/table_dir = check_dir()
 	if(exiter == src)
 		return // Let's not block ourselves.
 
-	if(table_type == /obj/structure/table/glass) //Glass table, jolly ranchers pass
+	if(table_type == /obj/structure/table/glass) //Glass table, lasers pass
 		if(istype(exiter) && (exiter.pass_flags & PASSGLASS))
 			return
 	if(istype(exiter, /obj/projectile))
 		return
-	if(direction == dir)
+	if(direction == table_dir)
 		exiter.Bump(src)
 		return COMPONENT_ATOM_BLOCK_EXIT
 	return
@@ -51,10 +63,10 @@
 	. = ..()
 	if(!istype(user) || !user.can_interact_with(src))
 		return FALSE
-	user.visible_message("<span class='danger'>[user] starts flipping [src]!</span>", "<span class='notice'>You start flipping over the [src]!</span>")
+	user.visible_message(span_danger("[user] starts flipping [src]!"), span_notice("You start flipping over the [src]!"))
 	if(do_after(user, max_integrity/4))
 		var/obj/structure/table/table_unflip = new table_type(src.loc)
 		table_unflip.obj_integrity = obj_integrity
-		user.visible_message("<span class='danger'>[user] flips over the [src]!</span>", "<span class='notice'>You flip over the [src]!</span>")
+		user.visible_message(span_danger("[user] flips over the [src]!"), span_notice("You flip over the [src]!"))
 		playsound(src, 'sound/items/trayhit2.ogg', 100)
 		qdel(src)