Remote Control (Turtle)

-- Interpret rednet signals as movement commands

local id, message;

function selectAndSendSlot()
    turtle.select(turtle.getSelectedSlot()%16+1)
    local block = turtle.getItemDetail();
    if block then return block.name; else return "Empty slot"; end
end

function deselectAndSendSlot()
    turtle.select(turtle.getSelectedSlot()%16+1)
    local block = turtle.getItemDetail();
    if block then return block.name; else return "Empty slot"; end
end

function observe()
    local isBlock, blockData = turtle.inspect();
    local str = "";
    if not isBlock then str = str.."Not a block\n"; end
    if blockData.name then str = str..blockData.name.."\n"; end
    if blockData.state then str = str..textutils.serializeJSON(blockData.state, true).."\n"; end
    return str;
end

function observeUp()
    local isBlock, blockData = turtle.inspectUp();
    local str = "";
    if not isBlock then str = str.."Not a block\n"; end
    if blockData.name then str = str..blockData.name.."\n"; end
    if blockData.state then str = str..textutils.serializeJSON(blockData.state, true).."\n"; end
    return str;
end

function observeDown()
    local isBlock, blockData = turtle.inspectDown();
    local str = "";
    if not isBlock then str = str.."Not a block\n"; end
    if blockData.name then str = str..blockData.name.."\n"; end
    if blockData.state then str = str..textutils.serializeJSON(blockData.state, true).."\n"; end
    return str;
end


local moves = {
[32] = turtle.up,
[340] = turtle.down,
[87] = turtle.forward,
[83] = turtle.back,
[65] = turtle.turnLeft,
[68] = turtle.turnRight,
[82] = turtle.digUp,
[70] = turtle.dig,
[67] = turtle.digDown,
[84] = turtle.placeUp,
[71] = turtle.place,
[86] = turtle.placeDown,
[90] = turtle.refuel,
[49] = selectAndSendSlot,
[50] = deselectAndSendSlot,
[89] = observeUp,
[72] = observe,
[66] = observeDown,
[85] = turtle.suckUp,
[74] = turtle.suck,
[78] = turtle.suckDown,
[73] = turtle.dropUp,
[75] = turtle.drop,
[77] = turtle.dropDown,
[88] = turtle.equipRight,
[79] = turtle.attackUp,
[76] = turtle.attack,
[188] = turtle.attackDown
};

peripheral.find("modem", rednet.open);
while true do
    id, message = rednet.receive();
    if moves[tonumber(message)] then
        local msg = moves[tonumber(message)]();
        if tostring and tostring(msg) ~= "true" then rednet.send(id, msg); else rednet.send(id, ""); end
    else
        rednet.send(id, "Button not mapped");
    end
end