Adds a new gamemode, Trifecta (#20140)

* not to be confused with triple ai mode

* now with real point calculating action™️

* hal's changes

* steels changes

* traitor / changeling chaplain fixed

* rerun checks to stop random metastation fail

* Apply suggestions from code review

Co-authored-by: Ryan <80364400+Sirryan2002@users.noreply.github.com>

* Apply suggestions from code review

Co-authored-by: Farie82 <farie82@users.noreply.github.com>

* Henks changes.

---------

Co-authored-by: Ryan <80364400+Sirryan2002@users.noreply.github.com>
Co-authored-by: Farie82 <farie82@users.noreply.github.com>

code/game/gamemodes/trifecta/trifecta.dm

@@ -0,0 +1,111 @@
+#define TOT_COST 5
+#define VAMP_COST 10
+#define CLING_COST 10
+
+
+/datum/game_mode/trifecta
+	name = "Trifecta"
+	config_tag = "trifecta"
+	protected_jobs = list("Security Officer", "Warden", "Detective", "Head of Security", "Captain", "Blueshield", "Nanotrasen Representative", "Magistrate", "Internal Affairs Agent", "Nanotrasen Navy Officer", "Special Operations Officer", "Solar Federation General")
+	restricted_jobs = list("Cyborg")
+	secondary_restricted_jobs = list("AI")
+	required_players = 10
+	required_enemies = 1	// how many of each type are required
+	recommended_enemies = 3
+	secondary_protected_species = list("Machine")
+	var/vampire_restricted_jobs = list("Chaplain")
+	var/list/datum/mind/pre_traitors = list()
+	var/list/datum/mind/pre_changelings = list()
+	var/list/datum/mind/pre_vampires = list()
+	var/amount_vamp = 1
+	var/amount_cling = 1
+	var/amount_tot = 1
+
+/datum/game_mode/trifecta/announce()
+	to_chat(world, "<b>The current game mode is - Trifecta</b>")
+	to_chat(world, "<b>Vampires, traitors, and changelings, oh my! Stay safe as these forces work to bring down the station.</b>")
+
+
+/datum/game_mode/trifecta/pre_setup()
+	calculate_quantities()
+	if(GLOB.configuration.gamemode.prevent_mindshield_antags)
+		restricted_jobs += protected_jobs
+	var/list/datum/mind/possible_vampires = get_players_for_role(ROLE_VAMPIRE)
+
+	if(!length(possible_vampires))
+		return FALSE
+
+	for(var/datum/mind/vampire as anything in shuffle(possible_vampires))
+		if(length(pre_vampires) >= amount_vamp)
+			break
+		if(vampire.current.client.prefs.active_character.species in secondary_protected_species)
+			continue
+		pre_vampires += vampire
+		vampire.special_role = SPECIAL_ROLE_VAMPIRE
+		vampire.restricted_roles = (restricted_jobs + secondary_restricted_jobs + vampire_restricted_jobs)
+
+	//Vampires made, off to changelings
+	var/list/datum/mind/possible_changelings = get_players_for_role(ROLE_CHANGELING)
+
+	if(!length(possible_changelings))
+		return FALSE
+
+	for(var/datum/mind/changeling as anything in shuffle(possible_changelings))
+		if(length(pre_changelings) >= amount_cling)
+			break
+		if((changeling.current.client.prefs.active_character.species in secondary_protected_species) || changeling.special_role == SPECIAL_ROLE_VAMPIRE)
+			continue
+		pre_changelings += changeling
+		changeling.restricted_roles = (restricted_jobs + secondary_restricted_jobs)
+		changeling.special_role = SPECIAL_ROLE_CHANGELING
+
+	//And now traitors
+	var/list/datum/mind/possible_traitors = get_players_for_role(ROLE_TRAITOR)
+
+	//stop setup if no possible traitors
+	if(!length(possible_traitors))
+		return FALSE
+
+	for(var/datum/mind/traitor as anything in shuffle(possible_traitors))
+		if(length(possible_traitors) >= amount_tot)
+			break
+		if(traitor.special_role == SPECIAL_ROLE_VAMPIRE || traitor.special_role == SPECIAL_ROLE_CHANGELING) // no traitor vampires or changelings
+			continue
+		pre_traitors += traitor
+		traitor.special_role = SPECIAL_ROLE_TRAITOR
+		traitor.restricted_roles = restricted_jobs
+
+	return TRUE
+
+/datum/game_mode/trifecta/proc/calculate_quantities()
+	var/points = num_players()
+	while(points > 0)
+		if(points < TOT_COST)
+			amount_tot++
+			points = 0
+			return
+
+		switch(rand(1, 4))
+			if(1 to 2)
+				amount_tot++
+				points -= TOT_COST
+			if(3)
+				amount_vamp++
+				points -= VAMP_COST
+			if(4)
+				amount_cling++
+				points -= CLING_COST
+
+/datum/game_mode/trifecta/post_setup()
+	for(var/datum/mind/vampire as anything in pre_vampires)
+		vampire.add_antag_datum(/datum/antagonist/vampire)
+	for(var/datum/mind/changeling as anything in pre_changelings)
+		changeling.add_antag_datum(/datum/antagonist/changeling)
+	for(var/datum/mind/traitor as anything in pre_traitors)
+		traitor.add_antag_datum(/datum/antagonist/traitor)
+	..()
+
+
+#undef TOT_COST
+#undef VAMP_COST
+#undef CLING_COST

config/example/config.toml

@@ -243,6 +243,7 @@ gamemode_probabilities = [
 	{gamemode = "traitorvamp", probability = 3},
 	{gamemode = "vampire", probability = 3},
 	{gamemode = "wizard", probability = 2},
+	{gamemode = "trifecta", probability = 3},
 ]
 # Do we want the amount of traitors to scale with population?
 traitor_scaling = true

paradise.dme

@@ -663,6 +663,7 @@
 #include "code\game\gamemodes\nuclear\pinpointer.dm"
 #include "code\game\gamemodes\revolution\revolution.dm"
 #include "code\game\gamemodes\traitor\traitor.dm"
+#include "code\game\gamemodes\trifecta\trifecta.dm"
 #include "code\game\gamemodes\vampire\traitor_vamp.dm"
 #include "code\game\gamemodes\vampire\vampire_gamemode.dm"
 #include "code\game\gamemodes\wizard\artefact.dm"