xeno_defines.dm reorganisation (#5146)

# About the pull request
 
Wanted to get this done while I have no other xeno PRs open.
This PR makes no actual code changes, just moves code around.
xeno_defines.dm is long overdue reorganisation & it doesn't even contain
xeno defines.

- Moves `datum/caste_datum` and associated code to it's own file
caste_datum.dm
- Renames hive_status.dm (hive status ui code) to hive_status_ui.dm
- Moves `/proc/client` code to client_procs.dm
- Renames xeno_defines.dm to hive_status.dm as it contains
`/datum/hive_status` and relevant code

# Explain why it's good for the game

Easier to interact and find relevant things in xeno code with the files
named with what they actually contain.

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

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
code: Reorganises some xeno code from xeno_defines.dm
/:cl:

code/modules/client/client_procs.dm

@@ -795,3 +795,50 @@ GLOBAL_LIST_INIT(whitelisted_client_procs, list(
 		xeno_prefix = "XX"
 	if(!xeno_postfix || xeno_name_ban)
 		xeno_postfix = ""
+
+/// playtime for all castes
+/client/proc/get_total_xeno_playtime(skip_cache = FALSE)
+	if(cached_xeno_playtime && !skip_cache)
+		return cached_xeno_playtime
+
+	var/total_xeno_playtime = 0
+
+	for(var/caste in GLOB.RoleAuthority.castes_by_name)
+		total_xeno_playtime += get_job_playtime(src, caste)
+
+	total_xeno_playtime += get_job_playtime(src, JOB_XENOMORPH)
+
+	if(player_entity)
+		var/past_xeno_playtime = player_entity.get_playtime(STATISTIC_XENO)
+		if(past_xeno_playtime)
+			total_xeno_playtime += past_xeno_playtime
+
+
+	cached_xeno_playtime = total_xeno_playtime
+
+	return total_xeno_playtime
+
+/// playtime for drone and drone evolution castes
+/client/proc/get_total_drone_playtime()
+	var/total_drone_playtime = 0
+
+	var/list/drone_evo_castes = list(XENO_CASTE_DRONE, XENO_CASTE_CARRIER, XENO_CASTE_BURROWER, XENO_CASTE_HIVELORD, XENO_CASTE_QUEEN)
+
+	for(var/caste in GLOB.RoleAuthority.castes_by_name)
+		if(!(caste in drone_evo_castes))
+			continue
+		total_drone_playtime += get_job_playtime(src, caste)
+
+	return total_drone_playtime
+
+/// playtime for t3 castes and queen
+/client/proc/get_total_t3_playtime()
+	var/total_t3_playtime = 0
+	var/datum/caste_datum/caste
+	for(var/caste_name in GLOB.RoleAuthority.castes_by_name)
+		caste = GLOB.RoleAuthority.castes_by_name[caste_name]
+		if(caste.tier < 3)
+			continue
+		total_t3_playtime += get_job_playtime(src, caste_name)
+
+	return total_t3_playtime

code/modules/mob/living/carbon/xenomorph/castes/caste_datum.dm

@@ -0,0 +1,185 @@
+// Actual caste datum basedef
+/datum/caste_datum
+	var/caste_type = ""
+	var/display_name = ""
+	var/tier = 0
+	var/dead_icon = "Drone Dead"
+	var/language = LANGUAGE_XENOMORPH
+	var/melee_damage_lower = 10
+	var/melee_damage_upper = 20
+	///allows fine tuning melee damage to vehicles per caste.
+	var/melee_vehicle_damage = 10
+	var/evasion = XENO_EVASION_NONE
+
+	var/speed = XENO_SPEED_TIER_10
+
+	var/plasma_max = 10
+	var/plasma_gain = 5
+
+	var/crystal_max = 0
+
+	var/max_health = XENO_UNIVERSAL_HPMULT * 100
+	///Are they allowed to evolve (and have their evolution progress group)
+	var/evolution_allowed = 1
+	///Threshold to next evolution
+	var/evolution_threshold = 0
+	/// whether they can get evo points without needing an ovi queen
+	var/evolve_without_queen = FALSE
+	///This is where you add castes to evolve into. "Separated", "by", "commas"
+	var/list/evolves_to = list()
+	/// what caste or castes to de-evolve to.
+	var/list/deevolves_to = list()
+	///If they can use consoles, etc. Set on Queen
+	var/is_intelligent = 0
+	var/caste_desc = null
+
+	// Tackles
+	var/tackle_min = 2
+	var/tackle_max = 6
+	var/tackle_chance = 35
+	var/tacklestrength_min = 2
+	var/tacklestrength_max = 3
+
+	///Chance of deflecting projectiles.
+	var/armor_deflection = 0
+	var/fire_immunity = FIRE_IMMUNITY_NONE
+	var/fire_intensity_resistance = 0
+
+	///Delay timer for spitting
+	var/spit_delay = 60
+
+	/// Windup for spits
+	var/spit_windup = FALSE
+
+	///The strength of our aura. Zero means we can't emit one
+	var/aura_strength = 0
+
+	///"Evolving" removed for the time being
+	var/aura_allowed = list("frenzy", "warding", "recovery")
+
+	///Adjust pixel size. 0.x is smaller, 1.x is bigger, percentage based.
+	var/adjust_size_x = 1
+	var/adjust_size_y = 1
+
+	///list of datum projectile types the xeno can use.
+	var/list/spit_types
+
+	var/attack_delay = 0 //Bonus or pen to time in between attacks. + makes slashes slower.
+
+	var/agility_speed_increase = 0 // this opens up possibilities for balancing
+
+	// The type of mutator delegate to instantiate on the base caste. Will
+	// be replaced when the Xeno chooses a strain.
+	var/behavior_delegate_type = /datum/behavior_delegate
+
+	// Resin building-related vars
+	/// Default build time and build distance
+	var/build_time_mult = BUILD_TIME_MULT_XENO
+	var/max_build_dist = 0
+
+	// Carrier vars //
+
+	/// if a hugger is held in hand, won't attempt to leap and kill itself
+	var/hugger_nurturing = FALSE
+	var/huggers_max = 0
+	var/throwspeed = 0
+	var/hugger_delay = 0
+	var/eggs_max = 0
+	var/egg_cooldown = 30
+	///Armor but for explosions
+	var/xeno_explosion_resistance = 0
+
+	//Queen vars
+	var/can_hold_facehuggers = 0
+	var/can_hold_eggs = CANNOT_HOLD_EGGS
+
+	var/can_be_queen_healed = TRUE
+	var/can_be_revived = TRUE
+
+	var/can_vent_crawl = 1
+
+	var/caste_luminosity = 0
+
+	/// if fire_immunity is set to be vulnerable, how much will fire damage be multiplied. Defines in xeno.dm
+	var/fire_vulnerability_mult = 0
+
+	var/burrow_cooldown = 5 SECONDS
+	var/tunnel_cooldown = 100
+	var/widen_cooldown = 10 SECONDS
+	///Big strong ability, big cooldown.
+	var/tremor_cooldown = 30 SECONDS
+	///whether the xeno heals even outside weeds.
+	var/innate_healing = FALSE
+
+	var/acid_level = 0
+	var/weed_level = WEED_LEVEL_STANDARD
+	///Time it takes between acid splash retaliate procs. Variable per caste, for if we want future castes that are acid bombs
+	var/acid_splash_cooldown = 3 SECONDS
+
+	// regen vars
+
+	var/heal_delay_time = 0 SECONDS
+	var/heal_resting = 1
+	var/heal_standing = 0.4
+	var/heal_knocked_out = 0.33
+
+	var/list/resin_build_order
+	var/minimum_xeno_playtime = 0
+
+// cannot evolve to this caste until the round has been going on for this amount of time
+	// IMPORTANT: this is ROUND_TIME, not world.time
+	var/minimum_evolve_time = 1 MINUTES
+	/// Iconstate for the xeno on the minimap
+	var/minimap_icon = "xeno"
+	///The iconstate for leadered xenos on the minimap, added as overlay
+	var/minimap_leadered_overlay = "xenoleader"
+
+	var/royal_caste = FALSE
+
+
+/datum/caste_datum/can_vv_modify()
+	return FALSE
+
+/datum/caste_datum/New()
+	. = ..()
+
+	//Initialise evolution and upgrade thresholds in one place, once and for all
+	evolution_threshold = 0
+	if(evolution_allowed)
+		switch(tier)
+			if(0)
+				evolution_threshold = 60
+			if(1)
+				evolution_threshold = 200
+			if(2)
+				evolution_threshold = 500
+			//Other tiers (T3, Queen, etc.) can't evolve anyway
+
+	resin_build_order = GLOB.resin_build_order_drone
+
+/client/var/cached_xeno_playtime
+
+/datum/caste_datum/proc/can_play_caste(client/client)
+	if(!CONFIG_GET(flag/use_timelocks))
+		return TRUE
+
+	var/total_xeno_playtime = client.get_total_xeno_playtime()
+
+	if(minimum_xeno_playtime && total_xeno_playtime < minimum_xeno_playtime)
+		return FALSE
+
+	return TRUE
+
+/datum/caste_datum/proc/get_caste_requirement(client/client)
+	return minimum_xeno_playtime - client.get_total_xeno_playtime()
+
+/datum/caste_datum/proc/get_minimap_icon()
+	var/image/background = mutable_appearance('icons/ui_icons/map_blips.dmi', "background")
+	background.color = MINIMAP_ICON_BACKGROUND_XENO
+
+	var/iconstate = minimap_icon ? minimap_icon : "unknown"
+	var/mutable_appearance/icon = image('icons/ui_icons/map_blips.dmi', icon_state = iconstate)
+	icon.appearance_flags = RESET_COLOR
+	background.overlays += icon
+
+	return background