big ass modding update

src/battle/StatusRegistry.lua

@@ -0,0 +1,57 @@
+-- Status infliction against the merged statuses registry: the shared
+-- immunity rules stay here, the per-status ones live on the records
+-- (canInflict) and so does the landing text (onInflict), so a mod status
+-- inflicts through the same path as the vanilla five.
+
+local Runtime = require("src.mods.Runtime")
+local Status = require("src.battle.Status")
+
+local StatusRegistry = {}
+
+-- pokered's <USER>/<TARGET> text macros (home/text.asm
+-- PlaceMoveUsersName): enemy-mon texts print "Enemy " before the name
+local function displayName(b)
+  return b.isPlayer and b.name or ("Enemy " .. b.name)
+end
+
+-- opts: toxic (start the Toxic counter), moveType (for the type gates),
+-- secondary (side-effect of a damaging move), source (inflicting move id).
+-- Returns messages; empty means the status did not land.
+function StatusRegistry.inflict(battle, target, status, opts)
+  opts = opts or {}
+  if target.mon.status then return {} end
+  -- Substitutes block poison (PoisonEffect calls CheckTargetSubstitute)
+  -- and every secondary status, but NOT primary Sleep or Thunder Wave,
+  -- their handlers never check the substitute in Gen 1.
+  if target.substituteHP and (opts.secondary or status == "PSN") then
+    return {}
+  end
+  -- FreezeBurnParalyzeEffect: a secondary status never lands when the
+  -- move's type matches either of the target's types (Body Slam can't
+  -- paralyze Normals, Fire can't burn Fire, Ice can't freeze Ice)
+  if opts.secondary and status ~= "PSN" then
+    for _, t in ipairs(target.curTypes or {}) do
+      if opts.moveType == t then return {} end
+    end
+  end
+  local statuses = battle and battle.data and battle.data.statuses
+  local record = Status.recordFor(statuses, status)
+  if record and record.canInflict and not record.canInflict(target, opts) then
+    return {}
+  end
+  target.mon.status = status
+  local msgs
+  local display = displayName(target)
+  if record and record.onInflict then
+    msgs = record.onInflict(battle, target, opts, display)
+  else
+    msgs = { ("%s\nwas afflicted\nby %s!"):format(display,
+               record and record.label or tostring(status)) }
+  end
+  Runtime.emit("battle.status_inflicted", {
+    battle = battle, target = target, status = status, source = opts.source,
+  })
+  return msgs
+end
+
+return StatusRegistry