Adding call_handlers

Modding
1

Heloo! I’m trying to get a call_handler to work, so I can add items to a world through the console (call…) I think I have put the call handler in the manifest.json fine, but I’m not so sure about the actual lua file, or maybe it is the manifest.json.

Anywho, here are the files:

manifest.json:

{
  "info": {
    "name": "Command Item Spawner",
    "version": 1
  },

  "functions": {
    "create_item_iconic": {
      "controller": "file(call_handlers/item_spawn_handler.lua)",
      "endpoint": "server"
    },
    "create_item": {
      "controller": "file(call_handlers/item_spawn_handler.lua)",
      "endpoint": "server"
    },
    "create_item_other": {
      "controller": "file(call_handlers/item_spawn_handler.lua)",
      "endpoint": "server"
    }
  }
}

call_handlers/item_spawn_handler.lua:

local Point3 = _radiant.csg.Point3
local log = radiant.log.create_logger('item_spawn_call_logger')

local ItemSpawnHandler = class()

function ItemSpawnHandler:create_item_iconic(session, response, item, x, y, z)
	local entity = radiant.entities.create_entity(item)
	radiant.terrain.place_entity(entity, Point3(x, y, z), {force_iconic = true})

	return true
end

function ItemSpawnHandler:create_item(session, response, item, x, y, z)
	local entity = radiant.entities.create_entity(item)
	radiant.terrain.place_entity(entity, Point3(x, y, z), { })
end

function ItemSpawnHandler:create_item_other(session, response, item, x, y, z, iconic, owner)
	local entity = radiant.entities.create_entity(item)
	
	if owner ~= 'none':
		entity:add_component('unit_info'):set_player_id(owner)
	
	radiant.terrain.place_entity(entity, Point3(x, y, z), { force_iconic = iconic })
end

return ItemSpawnHandler
2

I haven’t tested it, but it looks okay. You should be able to do call create_item_iconic alias x y z, but I haven’t tested call at all yet. If you wanted to make your life easier, I would recommend my console mod, which makes the console a lot more usable.

With Jelly.Console+, you could re-write your first function as

jelly_console.add_command('create_item_iconic', function(cmd, args)
  local alias, x, y, z = unpack(args)
  local entity = radiant.entities.create_entity(alias)
  radiant.terrain.place_entity(entity, Point3(x, y, z), { force_iconic = true })
end)

and then simply call it in the console using create_item_iconic.

3

Ok. I have tries some things, and it seems it was a couple problems:

  1. The .smod wasn’t zipped correctly
  2. I had a few lua errors (I like python!)

It works well now, but now i’m trying to get stonehearth.selection to work with this code:

function ItemSpawnHandler:create_item_iconic(session, response, item, x, y, z)

	

	local entity = radiant.entities.create_entity(item)
	stonehearth.selection = LocationSelector()
	stonehearth.selection:select_location():set_cursor_entity(entity):done(

		function(selector, location, rotation)
			radiant.terrain.place_entity(entity, Point3(location.x, location.y, location.z), {force_iconic = true})
			selector.destroy()
		end):fail(
		function(selector)
			seletor.destroy()
		end):go()
	
	

	

	return true
end
4

I’m not 100% certain, but I think the cursor entity is destroyed after the selection was completed. Create a new entity at the location that you get instead of trying to set the cursor.

5

The cursor isn’t actually loading, its just throwing a cannot index stonehearth.selection

6

Oh. Of course. Selection stuff needs to be on the client, while creating the entity needs to happen on the server. You’ll need to have two call handlers; one to start the selection, another to spawn the entity. That sounds like something that could be useful for jelly_console too.

So anyway: Your selection code needs to be in a clientside call handler; in the selected callback you then need to _radiant.call into the server side to place your entity.

7

Oh… Ok. That makes some sense. I’ll try it now.

8

And so you know, I’m going to add a ui frontend when i figure out how to, so no console needed. I’m just starting with a console based system.

9

Also, what are the arguments for .call()?

10

Use the edit function of Discourse instead of writing multiple posts right after each other.

I would highly recommend you look at other code. I would recommend the newgame callhandler as it’s basically doing what you want to do with the town banner. The arguments to _radiant.call are the same ones as in JavaScript; callhandler_name, [... args]. In your case I guess _radiant.call('my_mod:create_server_item', item_alias, x, y, z).

11

Well, I’ve got a selector “working”, but when I click it just says “attempt to index self, a nil value” in stonehearth.smod/services/client/location_selector.luac

And here’s the contents of my .smod as a zip:

Plus, if you wish to replicate this, I use this command:

call itemspawn:select_location_item_iconic stonehearth:furniture:comfy_bed
12

It’s selector:destroy, not selector.destroy. I really recommend checking out stonehearth/call_handlers/new_game_call_handler.lua, especially NewGameCallHandler:choose_camp_location and its serverside counterpart NewGameCallHandler:create_camp.

13

Ok. I was looking at create_workshop_handler.luac, and I guess I didn’t see that. Oops.

(I’m still new to lua, I know : is indexing, but I have no clue what the . means)

But I’ll go try that now, and take a peek at new_game_call_handler.luac.

EDIT:

Ok, I’ve got the selector to stop erroring out, but the other call_handler isn’t doing anything or isn’t running.

Code:

14

foo:bar(1, 2, 3) is equal to foo.bar(foo, 1, 2, 3). function Foo.bar(self, a, b, c) is equal to function Foo:bar(a, b, c). It’s effectively syntax sugar for pseudo-OOP.

I can’t download your smod from dropbox right now. Is there any error in the stonehearth.log? Can you maybe upload your call handlers somewhere (pastebin, gist, something like that)?

15

I sure can!

http://pastebin.com/WuSAqfYC

EDIT:

There wasn’t any error in stonehearth.log.