place block chat command

[RHR]

Hey guys I need some help:
I want to create a mod with a chat command that places a block on a position, but I have no idea how to do that. The idea behind that is that it would be very useful in creative mode if you use the singlenode mapgen (currently I always have to use worldedit to do that).

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in general:
/placeblock modname:nodename x,y,z
example:
/placeblock default:stone 10,15,10

[Krock]

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/placeblock default:stone 10,15,10

given: player name and param ("default:stone 10,15,10")

Now let's split this param string:

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local args = param:split(" ")

-> Outputs an array: { "default:stone", "10,15,10" }

Now split the 2nd element into numbers:

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local arg_pos = args[2]:split(",")
local pos = { x = tonumber(arg_pos[1]), y = tonumber(arg_pos[2]), z = tonumber(arg_pos[3]) }

And the final code:

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local args = param:split(" ")
if #args ~= 2 then
   return false, "Wrong arguments"
end
local arg_pos = args[2]:split(",")
if #arg_pos ~= 3 then
   return false, "Wrong arguments"
end
local pos = { x = tonumber(arg_pos[1]), y = tonumber(arg_pos[2]), z = tonumber(arg_pos[3]) }
minetest.set_node(pos, { name = args[1] })

[Hybrid Dog]

lf you use worldedit and don't want to have to type the commands, you could use the chatcommand tool making it execute the chatcommands "//pos1", "//pos2" and "//set default:cobble" when using it.
https://github.com/HybridDog/command_tool

[RHR]

@Krock:
Thx for that code that helps a lot! :D

@Hybrid Dog:
Thx, but I was just looking for a simple way to place a single block in the air. :)