Better trigger (#45)

* set gamerule a refresh trigger skill

* cost and use of trigger skill

lua/core/skill_type/trigger.lua

@@ -41,15 +41,42 @@ function TriggerSkill:triggerable(event, target, player, data)
     and (self.global or (target:isAlive() and target:hasSkill(self)))
 end
 
----Trigger this skill
+-- Determine how to cost this skill.
 ---@param event Event @ TriggerEvent
 ---@param target ServerPlayer @ Player who triggered this event
 ---@param player ServerPlayer @ Player who is operating
 ---@param data any @ useful data of the event
 ---@return boolean @ returns true if trigger is broken
 function TriggerSkill:trigger(event, target, player, data)
+  return self:doCost(event, target, player, data)
+end
+
+-- do cost and skill effect.
+-- DO NOT modify this function
+function TriggerSkill:doCost(event, target, player, data)
+  local ret = self:cost(event, target, player, data)
+  if ret then
+    local room = player.room
+    room:notifySkillInvoked(player, self.name)
+    ret = self:use(event, target, player, data)
+    return ret
+  end
+end
+
+-- ask player how to use this skill.
+---@param event Event @ TriggerEvent
+---@param target ServerPlayer @ Player who triggered this event
+---@param player ServerPlayer @ Player who is operating
+---@param data any @ useful data of the event
+---@return boolean @ returns true if trigger is broken
+function TriggerSkill:cost(event, target, player, data)
+  local ret = false
+  if self.frequency == Skill.Compulsory then
+    return true
+  end
+
   if player.room:askForSkillInvoke(player, self.name) then
-    return self:use(event, target, player, data)
+    return true
   end
   return false
 end

lua/fk_ex.lua

@@ -26,6 +26,8 @@ _, Weapon, Armor, DefensiveRide, OffensiveRide, Treasure = table.unpack(Equip)
 ---@field priority number | table<Event, number>
 ---@field on_trigger TrigFunc
 ---@field can_trigger TrigFunc
+---@field on_cost TrigFunc
+---@field on_use TrigFunc
 ---@field on_refresh TrigFunc
 ---@field can_refresh TrigFunc
 
@@ -59,6 +61,9 @@ function fk.CreateTriggerSkill(spec)
     skill.triggerable = spec.can_trigger
   end
 
+  if spec.on_cost then skill.cost = spec.on_cost end
+  if spec.on_use then skill.use = spec.on_use end
+
   if spec.can_refresh then
     skill.canRefresh = spec.can_refresh
   end

packages/standard/game_rule.lua

@@ -38,7 +38,7 @@ end
 
 GameRule = fk.CreateTriggerSkill{
   name = "game_rule",
-  events = {
+  refresh_events = {
     fk.GameStart, fk.DrawInitialCards, fk.TurnStart,
     fk.EventPhaseProceeding, fk.EventPhaseEnd, fk.EventPhaseChanging,
     fk.AskForPeaches, fk.AskForPeachesDone,
@@ -46,11 +46,11 @@ GameRule = fk.CreateTriggerSkill{
   },
   priority = 0,
 
-  can_trigger = function(self, event, target, player, data)
+  can_refresh = function(self, event, target, player, data)
     return (target == player) or (target == nil)
   end,
 
-  on_trigger = function(self, event, target, player, data)
+  on_refresh = function(self, event, target, player, data)
     if RoomInstance.tag["SkipGameRule"] then
       RoomInstance.tag["SkipGameRule"] = false
       return false

packages/standard/init.lua

@@ -31,16 +31,14 @@ local fankui = fk.CreateTriggerSkill{
     local from = room:getPlayerById(data.from)
     return from ~= nil and
       target == player and
-      target:hasSkill(self.name)
+      target:hasSkill(self.name) and
+      not target.dead
   end,
-  on_trigger = function(self, event, target, player, data)
+  on_use = function(self, event, target, player, data)
     local room = player.room
     local from = room:getPlayerById(data.from)
-    if (not from) or from:isNude() then return false end
+    local card = room:askForCardChosen(player, from, "he", self.name)
-    if room:askForSkillInvoke(player, self.name) then
+    room:obtainCard(player.id, card, false)
-      local card = room:askForCardChosen(player, from, "he", self.name)
-      room:obtainCard(player.id, card, false, fk.ReasonPrey)
-    end
   end
 }
 local simayi = General:new(extension, "simayi", "wei", 3)