From 4be41eb1ed2ff366bfe7bc190fc6a60098bf5b31 Mon Sep 17 00:00:00 2001
From: expwnent <null@nowhere.com>
Date: Thu, 3 Jul 2014 18:28:05 -0400
Subject: [PATCH] projectile-trigger.lua

---
 NEWS                                    |   2 +
 scripts/modtools/item-trigger.lua       |   2 +-
 scripts/modtools/projectile-trigger.lua | 101 ++++++++++++++++++++++++
 3 files changed, 104 insertions(+), 1 deletion(-)
 create mode 100644 scripts/modtools/projectile-trigger.lua

diff --git a/NEWS b/NEWS
index 86cfc9da0..deb0ce76e 100644
--- a/NEWS
+++ b/NEWS
@@ -69,6 +69,8 @@ DFHack future
                 makes raw moddable gods possible
             projectileExpansion.lua
                 adds extra functionality to projectiles
+            projectile-trigger.lua
+                standardized version of projectileExpansion
             reaction-trigger.lua
                 trigger commands when custom reactions complete
                 replaces autoSyndrome
diff --git a/scripts/modtools/item-trigger.lua b/scripts/modtools/item-trigger.lua
index 61d1cb3bf..b5b6ab700 100644
--- a/scripts/modtools/item-trigger.lua
+++ b/scripts/modtools/item-trigger.lua
@@ -48,7 +48,7 @@ function processTrigger(command)
   elseif arg == '\\UNIT_ID' then
    command2[i] = command.unit.id
   elseif string.sub(arg,1,1) == '\\' then
-   command2[i] = string.sub(command,2)
+   command2[i] = string.sub(arg,2)
   else
    command2[i] = arg
   end
diff --git a/scripts/modtools/projectile-trigger.lua b/scripts/modtools/projectile-trigger.lua
new file mode 100644
index 000000000..5315a9fd2
--- /dev/null
+++ b/scripts/modtools/projectile-trigger.lua
@@ -0,0 +1,101 @@
+--scripts/modtools/projectile-trigger.lua
+--author expwnent
+--based on Putnam's projectileExpansion
+
+local eventful = require 'plugins.eventful'
+local utils = require 'utils'
+
+materialTriggers = materialTriggers or {}
+
+eventful.enableEvent(eventful.eventType.UNLOAD,1)
+eventful.onUnload.projectileTrigger = function()
+ materialTriggers = {}
+end
+
+function processTrigger(args)
+ local command2 = {}
+ for _,arg in ipairs(args.command) do
+  if arg == '\\LOCATION' then
+   table.insert(command2,args.pos.x)
+   table.insert(command2,args.pos.y)
+   table.insert(command2,args.pos.z)
+  elseif arg == '\\PROJECTILE_ID' then
+   table.insert(command2,args.projectile.id)
+  elseif arg == '\\FIRER_ID' then
+   table.insert(command2,args.projectile.firer.id)
+  elseif string.sub(arg,1,1) == '\\' then
+   table.insert(command2,string.sub(arg,2))
+  else
+   table.insert(command2,arg)
+  end
+ end
+ dfhack.run_command(table.unpack(command2))
+end
+
+eventful.onProjItemCheckImpact.expansion = function(projectile)
+ local matStr = dfhack.matinfo.decode(projectile.item):getToken()
+ local table = {}
+ table.pos = projectile.cur_pos
+ table.projectile = projectile
+ table.item = projectile.item
+ for _,args in ipairs(materialTriggers[matStr] or {}) do
+  utils.fillTable(args,table)
+  processTrigger(args)
+  utils.unfillTable(args,table)
+ end
+end
+
+validArgs = validArgs or utils.invert({
+ 'help',
+ 'clear',
+ 'command',
+ 'material',
+})
+
+local args = utils.processArgs({...}, validArgs)
+
+if args.help then
+ print([[scripts/modtools/projectile-trigger.lua
+arguments
+    -help
+        print this help message
+    -clear
+        unregister all triggers
+    -material
+        specify a material for projectiles that will trigger the command
+        examples:
+            INORGANIC:IRON
+            CREATURE_MAT:DWARF:BRAIN
+            PLANT_MAT:MUSHROOM_HELMET_PLUMP:DRINK
+    -command [ commandList ]
+        \\LOCATION
+        \\PROJECTILE_ID
+        \\FIRER_ID
+        \\anything -> anything
+        anything -> anything
+]])
+ return
+end
+
+if args.clear then
+ materialTriggers = {}
+end
+
+if not args.command then
+ return
+end
+
+if not args.material then
+ error 'specify a material'
+end
+
+if not dfhack.matinfo.find(args.material) then
+ error ('invalid material: ' .. args.material)
+end
+
+if not materialTriggers[args.material] then
+ materialTriggers[args.material] = {}
+end
+table.insert(materialTriggers[args.material], args)
+
+