Project ARES: Almayer Sentries (#6268)

# About the pull request

Changes the sprites for the sentry deployment systems aboard the USS
Almayer to use a custom floor based holder, rather than a floating wall
mount.

Also adds mini sentry deployers, along with an AI-Core subtype that
autodeploys on lockdown.

# Explain why it's good for the game

Currently the sentry deployment system sprites are designed as if
they're mounted to walls, and they usually are, but on the Almayer
they're essentially floating next to the fuel pumps. This changes that.

Also it allows the AI Core to be protected from xenos without subjecting
non-existant joes to melee combat.


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>


![image](https://github.com/cmss13-devs/cmss13/assets/41653574/a4a671a2-2772-4c13-8f84-c11cf3bd807b)

![image](https://github.com/cmss13-devs/cmss13/assets/41653574/61f83c72-aa40-4a9b-b528-8fd86b4df5f5)


</details>


# Changelog
:cl:
imageadd: added sprites for floor-mounted sentry deployment systems.
add: Added mini-sentry deployment systems, and an AI Core subtype.
/:cl:

---------

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

code/game/machinery/sentry_holder.dm

@@ -16,6 +16,7 @@
 	var/ox = 0
 	var/oy = 0
 	var/require_red_alert = FALSE
+	var/base_icon_state = "sentry_system"
 
 /obj/structure/machinery/sentry_holder/Initialize()
 	. = ..()
@@ -76,13 +77,14 @@
 	deployment_cooldown = world.time + 50
 	deployed_turret.turned_on = TRUE
 	deployed_turret.forceMove(loc)
-	icon_state = "sentry_system_deployed"
+	icon_state = "[base_icon_state]_deployed"
 
-	for(var/mob/M in deployed_turret.loc)
-		if(deployed_turret.loc == src.loc)
-			step(M, deployed_turret.dir)
-		else
-			step(M, get_dir(src,deployed_turret))
+	if(deployed_turret.density)
+		for(var/mob/blocking_mob in deployed_turret.loc)
+			if(deployed_turret.loc == loc)
+				step(blocking_mob, deployed_turret.dir)
+			else
+				step(blocking_mob, get_dir(src, deployed_turret))
 
 	deployed_turret.setDir(dir)
 	deployed_turret.pixel_x = 0
@@ -103,7 +105,7 @@
 	deployed_turret.unset_range()
 	pixel_x = ox
 	pixel_y = oy
-	icon_state = "sentry_system_installed"
+	icon_state = "[base_icon_state]_installed"
 
 /obj/structure/machinery/sentry_holder/Destroy()
 	QDEL_NULL(deployed_turret)
@@ -115,5 +117,29 @@
 	turret_path = /obj/structure/machinery/defenses/sentry/premade/deployable/colony
 
 /obj/structure/machinery/sentry_holder/almayer
+	icon_state = "floor_sentry_installed"
 	turret_path = /obj/structure/machinery/defenses/sentry/premade/deployable/almayer
+	base_icon_state = "floor_sentry"
 	require_red_alert = TRUE
+
+/obj/structure/machinery/sentry_holder/almayer/mini
+	turret_path = /obj/structure/machinery/defenses/sentry/premade/deployable/almayer/mini
+
+/obj/structure/machinery/sentry_holder/almayer/mini/aicore
+
+/obj/structure/machinery/sentry_holder/almayer/mini/aicore/Initialize()
+	. = ..()
+	RegisterSignal(SSdcs, COMSIG_GLOB_AICORE_LOCKDOWN, PROC_REF(auto_deploy))
+	RegisterSignal(SSdcs, COMSIG_GLOB_AICORE_LIFT, PROC_REF(undeploy_sentry))
+
+/obj/structure/machinery/sentry_holder/almayer/mini/aicore/proc/auto_deploy()
+	if(deployed_turret.loc == src) //not deployed
+		if(stat & NOPOWER)
+			return FALSE
+
+		deploy_sentry()
+		return TRUE
+
+/obj/structure/machinery/sentry_holder/almayer/mini/aicore/attack_hand(mob/user)
+	to_chat(user, SPAN_WARNING("[src] can only be deployed remotely."))
+	return

code/modules/defenses/sentry.dm

@@ -527,9 +527,26 @@
 	selected_categories[SENTRY_CATEGORY_IFF] = FACTION_COLONY
 
 /obj/structure/machinery/defenses/sentry/premade/deployable/almayer
-	fire_delay = 4
+	name = "UA-635C Static Gauss Turret"
+	desc = "A fully-automated defence turret with mid-range targeting capabilities. Armed with a modified M32-S Autocannon and an internal belt feed and modified for UA warship use."
+	fire_delay = 0.4 SECONDS
 	omni_directional = TRUE
 
+/obj/structure/machinery/defenses/sentry/premade/deployable/almayer/mini
+	name = "UA 512-S mini sentry"
+	desc = "A fully-automated defence turret with mid-range targeting capabilities. Armed with a modified M30 Autocannon and an internal belt feed and modified for UA warship use."
+	defense_type = "Mini"
+	fire_delay = 0.25 SECONDS
+	health = 150
+	health_max = 150
+	damage_mult = 0.6
+	density = FALSE
+	layer = BELOW_MOB_LAYER
+	disassemble_time = 0.75 SECONDS
+	handheld_type = /obj/item/defenses/handheld/sentry/mini
+	composite_icon = FALSE
+
+
 //the turret inside the shuttle sentry deployment system
 /obj/structure/machinery/defenses/sentry/premade/dropship
 	density = TRUE

maps/map_files/USS_Almayer/USS_Almayer.dmm

@@ -23036,6 +23036,12 @@
 	icon_state = "plate"
 	},
 /area/almayer/maint/hull/upper/p_bow)
+"dJC" = (
+/obj/structure/machinery/sentry_holder/almayer/mini/aicore,
+/turf/open/floor/almayer/no_build{
+	icon_state = "plating"
+	},
+/area/almayer/command/airoom)
 "dJG" = (
 /obj/structure/pipes/standard/simple/hidden/supply{
 	dir = 9
@@ -140719,7 +140725,7 @@ daz
 daz
 eKJ
 yaZ
-ffE
+dJC
 hZj
 clw
 daz
@@ -141531,7 +141537,7 @@ daz
 daz
 eKJ
 yaZ
-ffE
+dJC
 hZj
 fQD
 daz