[MIRROR] Drowsiness refactor [MDB IGNORE] (#8836)

* Drowsiness refactor (#62104)

Creates two procs in /mob/status_procs for handling drowsiness changes (with check for negative values), and refactors all code to use these procs instead of assigning values to the mob's drowsiness themselves.

* Drowsiness refactor

* Fixing more stuff in our code

Co-authored-by: thatoneplebeian <67017991+thatoneplebeian@users.noreply.github.com>
Co-authored-by: GoldenAlpharex <jerego1234@hotmail.com>

code/modules/mob/living/carbon/life.dm

@@ -546,7 +546,7 @@ All effects don't start immediately, but rather get worse over time; the rate is
 		dizziness = max(dizziness - (restingpwr * delta_time), 0)
 
 	if(drowsyness)
-		drowsyness = max(drowsyness - (restingpwr * delta_time), 0)
+		adjust_drowsyness(-1 * restingpwr * delta_time)
 		blur_eyes(1 * delta_time)
 		if(DT_PROB(2.5, delta_time))
 			AdjustSleeping(100)

code/modules/mob/living/damage_procs.dm

@@ -115,7 +115,7 @@
 		if(EFFECT_EYE_BLUR)
 			blur_eyes(effect * hit_percent)
 		if(EFFECT_DROWSY)
-			drowsyness = max(drowsyness,(effect * hit_percent))
+			adjust_drowsyness(effect * hit_percent)
 		if(EFFECT_JITTER)
 			if((status_flags & CANSTUN) && !HAS_TRAIT(src, TRAIT_STUNIMMUNE))
 				jitteriness = max(jitteriness,(effect * hit_percent))

code/modules/mob/living/living.dm

@@ -806,7 +806,7 @@
 	fire_stacks = 0
 	set_confusion(0)
 	dizziness = 0
-	drowsyness = 0
+	set_drowsyness(0)
 	stuttering = 0
 	slurring = 0
 	jitteriness = 0

code/modules/mob/status_procs.dm

@@ -1,6 +1,6 @@
 
 //Here are the procs used to modify status effects of a mob.
-//The effects include: stun, knockdown, unconscious, sleeping, resting, jitteriness, dizziness, ear damage,
+//The effects include: stun, knockdown, unconscious, sleeping, resting, jitteriness, dizziness, drowsyness, ear damage,
 // eye damage, eye_blind, eye_blurry, druggy, TRAIT_BLIND trait, and TRAIT_NEARSIGHT trait.
 
 ///Set the jitter of a mob
@@ -19,6 +19,19 @@
 /mob/proc/set_dizziness(amount)
 	dizziness = max(amount, 0)
 
+/**
+* Set drowsyness of a mob to passed value
+*/
+/mob/proc/set_drowsyness(amount)
+	drowsyness = max(amount, 0)
+
+/**
+ * Adds passed value to the drowsyness of a mob
+ */
+/mob/proc/adjust_drowsyness(amount)
+	drowsyness = max(drowsyness + amount, 0)
+
+
 ///Blind a mobs eyes by amount
 /mob/proc/blind_eyes(amount)
 	adjust_blindness(amount)