--scripts/modtools/projectile-trigger.lua

--author expwnent

--based on Putnam's projectileExpansion

--TODO: trigger based on contaminants

--[[

BEGIN_DOCS

.. _scripts/modtools/projectile-trigger:

modtools/projectile-trigger

===========================

This triggers dfhack commands when projectiles hit their targets.

END_DOCS

]]

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)