[MIRROR] Fixes some tackle business (#1202)

* Fixes some tackle business (#81727)

## About The Pull Request

Fixes #81691 

Tackling was making the tackler grab themselves. 

I took this opportunity to cut down on some of these weird typecasts. 

## Changelog

:cl: Melbert
fix: Fixes grabbing yourself when you tackle someone.
/:cl:

* Fixes some tackle business

---------

Co-authored-by: MrMelbert <[email protected]>

code/datums/components/tackle.dm

@@ -164,8 +164,6 @@
 		neutral_outcome(user, target, tackle_word) //Forces a neutral outcome so you're not screwed too much from being blocked while tackling
 		return COMPONENT_MOVABLE_IMPACT_FLIP_HITPUSH
 
-
-
 	switch(roll)
 		if(-INFINITY to -1)
 			negative_outcome(user, target, roll, tackle_word) //OOF
@@ -178,6 +176,15 @@
 
 	return COMPONENT_MOVABLE_IMPACT_FLIP_HITPUSH
 
+/// Helper to do a grab and then adjust the grab state if necessary
+/datum/component/tackler/proc/do_grab(mob/living/carbon/tackler, mob/living/carbon/tackled, skip_to_state = GRAB_PASSIVE)
+	set waitfor = FALSE
+
+	if(!tackler.grab(tackled) || tackler.pulling != tackled)
+		return
+	if(tackler.grab_state != skip_to_state)
+		tackler.setGrabState(skip_to_state)
+
 /**
  * Our positive tackling outcomes.
  *
@@ -198,15 +205,10 @@
 	var/potential_outcome = (roll * 10)
 
 	if(ishuman(target))
-		var/mob/living/carbon/human/human_target = target
-		var/target_armor = human_target.run_armor_check(BODY_ZONE_CHEST, MELEE)
-		potential_outcome *= ((100 - target_armor) /100)
+		potential_outcome *= ((100 - target.run_armor_check(BODY_ZONE_CHEST, MELEE)) /100)
 	else
 		potential_outcome *= 0.9
 
-	var/mob/living/carbon/human/human_target = target
-	var/mob/living/carbon/human/human_sacker = user
-
 	switch(potential_outcome)
 		if(-INFINITY to 0) //I don't want to know how this has happened, okay?
 			neutral_outcome(user, target, roll, tackle_word) //Default to neutral
@@ -233,9 +235,7 @@
 			target.Paralyze(0.5 SECONDS)
 			target.Knockdown(3 SECONDS)
 			target.adjust_staggered_up_to(STAGGERED_SLOWDOWN_LENGTH * 2, 10 SECONDS)
-			if(ishuman(target) && ishuman(user))
-				INVOKE_ASYNC(human_sacker, TYPE_PROC_REF(/mob/living, grab), human_sacker, human_target)
-				human_sacker.setGrabState(GRAB_PASSIVE)
+			do_grab(user, target)
 
 		if(50 to INFINITY) // absolutely BODIED
 			var/stamcritted_user = HAS_TRAIT_FROM(user, TRAIT_INCAPACITATED, STAMINA)
@@ -259,9 +259,7 @@
 				target.Paralyze(0.5 SECONDS)
 				target.Knockdown(3 SECONDS)
 				target.adjust_staggered_up_to(STAGGERED_SLOWDOWN_LENGTH * 3, 10 SECONDS)
-				if(ishuman(target) && ishuman(user))
-					INVOKE_ASYNC(human_sacker, TYPE_PROC_REF(/mob/living, grab), human_sacker, human_target)
-					human_sacker.setGrabState(GRAB_AGGRESSIVE)
+				do_grab(user, target, GRAB_AGGRESSIVE)
 
 /**
  * Our neutral tackling outcome.
@@ -300,9 +298,7 @@
 	var/potential_roll_outcome = (roll * -10)
 
 	if(ishuman(user))
-		var/mob/living/carbon/human/human_sacker = target
-		var/attacker_armor = human_sacker.run_armor_check(BODY_ZONE_CHEST, MELEE)
-		potential_roll_outcome *= ((100 - attacker_armor) /100)
+		potential_roll_outcome *= ((100 - target.run_armor_check(BODY_ZONE_CHEST, MELEE)) /100)
 	else
 		potential_roll_outcome *= 0.9