Logikraft/items.lua

minetest.register_craftitem("logikraft:rotator", {
    description = "The rotator",
    inventory_image = "rotator.png",
    on_place = function(itemstack, user, pointed_thing)
        local node = minetest.get_node(pointed_thing.under)
        if not string.startsWith(node.name,"logikraft:cable_")
        then return itemstack
        end

        local new = logikraft.rotateCable(string.without(node.name,"logikraft:cable_"),1)
        minetest.swap_node(pointed_thing.under, {name = "logikraft:cable_" .. new})
        return itemstack
    end
})
minetest.register_craftitem("logikraft:linker", {
    description = "The linker",
    inventory_image = "linker.png",
    on_place = function(itemstack, user, pointed_thing)
        local meta = itemstack:get_meta()
        local node = minetest.get_node(pointed_thing.under)
        if meta:get_int("logikraft:selected_nb") ~= 0
        then
            local selectednb = meta:get_int("logikraft:selected_nb")
            local selectedx = meta:get_int("logikraft:selected_x")
            local selectedy = meta:get_int("logikraft:selected_y")
            local selectedz = meta:get_int("logikraft:selected_z")
            local selectedpos = {x = selectedx, y = selectedy, z = selectedz}
            if string.startsWith(node.name,"logikraft:cable_")
            then
                if selectedx == pointed_thing.under.x and selectedy == pointed_thing.under.y and selectedz == pointed_thing.under.z
                then
                    local thisnb = logikraft.lookingAtNbIndex(user,pointed_thing.under)
                    if(selectednb ~= thisnb)
                    then
                        local new = logikraft.connectInCable(string.without(node.name,"logikraft:cable_"),selectednb,thisnb)
                        minetest.swap_node(pointed_thing.under, {name = "logikraft:cable_" .. new})
                    end
                    meta:set_int("logikraft:selected_nb",0)
                    meta:set_string("inventory_image","linker.png")
                else
                    local thisnb = logikraft.lookingAtNbIndex(user,pointed_thing.under)
                    local new = logikraft.connectContiguousCable(
                        string.without(minetest.get_node(selectedpos).name,"logikraft:cable_"),selectedpos,selectednb,
                        string.without(node.name,"logikraft:cable_"),pointed_thing.under,thisnb)
                    if new
                    then
                        minetest.swap_node(selectedpos, {name = "logikraft:cable_" .. new[1]})
                        minetest.swap_node(pointed_thing.under, {name = "logikraft:cable_" .. new[2]})
                        meta:set_int("logikraft:selected_nb",0)
                        meta:set_string("inventory_image","linker.png")
                    else
                        minetest.chat_send_all("Les cables sont trop loins l'un de l'autre :/")
                    end
                end
            else
                local node_def = minetest.registered_nodes[minetest.get_node(pointed_thing.above).name]
                if not node_def or not node_def.buildable_to then
                    -- Then we cannot build here
                    return itemstack
                end
                minetest.add_node(pointed_thing.above, {name = "logikraft:cable_NSEW1"})
                meta:set_int("logikraft:selected_nb",0)
                meta:set_string("inventory_image","linker.png")
            end
        else
            if string.startsWith(node.name,"logikraft:cable_")
            then
                -- If we are looking at a cable we activate and store data
                meta:set_int("logikraft:selected_nb",logikraft.lookingAtNbIndex(user,pointed_thing.under))
                meta:set_int("logikraft:selected_x",pointed_thing.under.x)
                meta:set_int("logikraft:selected_y",pointed_thing.under.y)
                meta:set_int("logikraft:selected_z",pointed_thing.under.z)
                meta:set_string("inventory_image","linker_activated.png")
            else
                -- Else we place a cable
                local node_def = minetest.registered_nodes[minetest.get_node(pointed_thing.above).name]
                if not node_def or not node_def.buildable_to then
                    -- Then we cannot build here
                    return itemstack
                end
                minetest.add_node(pointed_thing.above, {name = "logikraft:cable_NSEW1"})
            end
        end
        
        return itemstack
    end,
    on_secondary_use = function(itemstack, user, pointed_thing)
        -- Looking at nothing -> we dispose of the data
        local meta = itemstack:get_meta()
        meta:set_int("logikraft:selected_nb",0)
        meta:set_string("inventory_image","linker.png")
        return itemstack
    end
})
minetest.register_craftitem("logikraft:unlinker", {
    description = "The unlinker",
    inventory_image = "unlinker.png",
    on_place = function(itemstack, user, pointed_thing)
        local node = minetest.get_node(pointed_thing.under)
        if not string.startsWith(node.name,"logikraft:cable_")
        then return itemstack
        end

        local index = logikraft.lookingAtNbIndex(user,pointed_thing.under)

        local new = logikraft.disconnectInCable(string.without(node.name,"logikraft:cable_"),index)
        if new
        then minetest.swap_node(pointed_thing.under, {name = "logikraft:cable_" .. new})
        else minetest.remove_node(pointed_thing.under)
        end
        
        return itemstack
    end
})