Add target validation and refactor spells with new cast logic

lib/spell/spell.lua

@@ -26,6 +26,25 @@ function spell:draw() end
 
 function spell:cast(caster, target) return end
 
+--- @param caster Character
+--- @param spellTarget SpellTarget
+--- @param targetPosition Vec3
+local function checkTarget(caster, spellTarget, targetPosition)
+    --- @TODO имплементировать все варианты SpellTarget
+    local targetCharacterId = Tree.level.characterGrid:get(targetPosition)
+    if spellTarget == "caster" then
+        return targetCharacterId == caster.id
+    end
+    if spellTarget == "character" then
+        return not not targetCharacterId
+    end
+    if spellTarget == "enemy" then
+        return targetCharacterId and targetCharacterId ~= caster.id
+    end
+
+    return true
+end
+
 --- Конструктор [Spell]
 --- @param data {tag: string, baseCost: integer, baseCooldown: integer, possibleTarget: SpellTarget, distance: integer?, onCast: fun(caster: Character, target: Vec3): Task}
 --- @return Spell
@@ -39,9 +58,6 @@ function spell.new(data)
     }
 
     function newSpell:cast(caster, target)
-        -- проверка корректности цели
-        --- @TODO имплементировать все варианты SpellTarget
-
         -- проверка на расстояние до цели
         if self.distance and caster:try(Tree.behaviors.positioned, function(p)
                 local dist = math.max(math.abs(p.position.x - target.x), math.abs(p.position.y - target.y))
@@ -51,6 +67,9 @@ function spell.new(data)
             return
         end
 
+        -- проверка корректности цели
+        if not checkTarget(caster, self.possibleTarget, target) then return end
+
         -- проверка на достаточное количество маны
         if caster:try(Tree.behaviors.stats, function(stats)
                 return stats.mana < self.baseCost
@@ -58,6 +77,10 @@ function spell.new(data)
             return
         end
 
+        caster:try(Tree.behaviors.stats, function(stats)
+            stats.mana = stats.mana - self.baseCost
+        end)
+
         return data.onCast(caster, target)
     end
 

lib/spellbook.lua

@@ -65,17 +65,20 @@ function walk:draw()
     love.graphics.setColor(1, 1, 1)
 end
 
-local regenerateMana = setmetatable({}, spell)
-regenerateMana.tag = "dev_mana"
-
-function regenerateMana:cast(caster, target)
+local regenerateMana = spell.new {
+    tag = "dev_mana",
+    baseCooldown = 2,
+    baseCost = 0,
+    possibleTarget = "caster",
+    distance = 0,
+    onCast = function(caster, target)
         caster:try(Tree.behaviors.stats, function(stats)
             stats.mana = 10
             stats.initiative = stats.initiative + 10
         end)
 
         local sprite = caster:has(Tree.behaviors.sprite)
-    if not sprite then return nil end
+        if not sprite then return task.fromValue() end
         print(caster.id, "has regenerated mana and gained initiative")
 
         local light = require "lib/character/character".spawn("Light Effect")
@@ -98,18 +101,18 @@ function regenerateMana:cast(caster, target)
             flash,
             sprite:animate("hurt")
         }
-end
+    end
+}
 
 local attack = spell.new {
     tag = "dev_attack",
     baseCooldown = 1,
     baseCost = 2,
     possibleTarget = "enemy",
-    distance = 2,
+    distance = 1,
     onCast = function(caster, target)
         --- @type Character
         local targetCharacterId = Tree.level.characterGrid:get(target)
-        if not targetCharacterId or targetCharacterId == caster.id then return task.fromValue() end
         local targetCharacter = Tree.level.characters[targetCharacterId]
         targetCharacter:try(Tree.behaviors.stats, function(stats)
             stats.hp = stats.hp - 4