XT 1.1 by negamartin

--XT V1.1 BY NEGAMARTIN
version=1.1;

--WIRELESS PART
running=false;
tempOpen=nil;
replacedRednet=false;
redrunEnv=nil;
function run()
    xt.running=true;
    local packetids={};
    local timerids={};
    while xt.running do
        eva={os.pullEvent()};

        if eva[1]=="modem_message" then
            pcall(function()
                local msg=textutils.unserialize(eva[5]);
                if msg.packetID==nil then error(); end
                if packetids[msg.packetID]==nil then
                    os.queueEvent("relayed_message",eva[2],eva[3],eva[4],msg,eva[6]);
                    packetids[msg.packetID]=true;
                    timerids[os.startTimer(4)]=msg.packetID;
                end
            end);
        elseif eva[1]=="timer" then
            pcall(function()
                packetids[timerids[eva[2]]]=nil;
                timerids[eva[2]]=nil;
            end);
        end
    end
    xt.running=false;
    if xt.replacedRednet then
        xt.replacedRednet=false;
        xt.redrunEnv.isOpen=xt.tempOpen;
        return false;
    end
end
function finish()
    xt.running=false;
    os.queueEvent("refresh event FTW!")
end
function replaceRednet()
    xt.replacedRednet=true;
    xt.redrunEnv=getfenv(rednet.run);
    xt.tempOpen=xt.redrunEnv.isOpen;
    xt.redrunEnv.isOpen=xt.run;
    os.queueEvent("modem_message","",0,0,"",0);
end

modem=nil;
function connectModem()
    local names=peripheral.getNames();
    local wlr=true;
    local modemSide;
    for i=1,2 do
        for _,name in ipairs(names) do
            if peripheral.getType(name)=="modem" then
                if peripheral.call(name,"isWireless")==wlr then
                    xt.modem=peripheral.wrap(name);
                    modemSide=name;
                    break;
                end
            end
        end
        if modemSide then break; end
        wlr=false;
    end
    if not modemSide then modemSide=false; end
    return modemSide;
end
function transmit(ch,rp,tab)
    if not xt.modem then
        xt.connectModem();
        if not xt.modem then error("Could not find modem",2); end
    end
    tab.packetID=math.random();
    xt.modem.transmit(ch,rp,textutils.serialize(tab))
end
function openChannel(ch)
    if not xt.modem then
        xt.connectModem();
        if not xt.modem then error("Could not find modem",2); end
    end
    xt.modem.open(ch);
    xt.modem.transmit(0,17871,textutils.serialize({["packetID"]=math.random(),["channel"]=ch}));
    return true;
end




--TURTLE PART
if turtle then
    sleep(0.1); --Sometimes the select gets stuck with no delay             TAKE IT AWAY AT YOUR OWN RISK
    x=0;
    y=64;
    z=0;
    f=0;
    s=1;
    turtle.select(1);
    if autoSave==nil then autoSave=true; end
    if replaceTurtle==nil then replaceTurtle=true; end

    local err=false;
    err=pcall(function()
        if fs.exists("xtdata") then
            if not fs.isDir("xtdata") then
                fs.move("xtdata","copyofxtdata");
                fs.makeDir("xtdata");
            end
        else
            fs.makeDir("xtdata");
        end
    end);
    err=err or pcall(function()
        if fs.exists("xtdata/xz") then
            local file=fs.open("xtdata/xz","r");
            x=math.floor(file.readLine());
            z=math.floor(file.readLine());
            file.close();
        end
    end);
    err=err or pcall(function()
        if fs.exists("xtdata/y") then
            local file=fs.open("xtdata/y","r");
            y=math.floor(file.readLine());
            file.close();
        end
    end);
    err=err or pcall(function()
        if fs.exists("xtdata/f") then
            local file=fs.open("xtdata/f","r");
            f=math.floor(file.readLine());
            file.close();
        end
    end);
    err=err or pcall(function()
        if fs.exists("xtdata/s") then
            local file=fs.open("xtdata/s","r");
            s=math.floor(file.readLine());
            turtle.select(s);
            file.close();
        end
    end);
    err=err or pcall(function()
        if fs.exists("xtdata/autosave") then
            local file=fs.open("xtdata/autosave","r");
            local tas=math.floor(file.readLine());
            if tas==1 then autoSave=true;
            elseif tas==0 then autoSave=false; end
            file.close();
        end
    end);

    function saveXZ()
        if not autoSave then return; end
        local file=fs.open("xtdata/xz","w");
        file.writeLine(xt.x);
        file.writeLine(xt.z);
        file.close();
    end
    function saveY()
        if not autoSave then return; end
        local file=fs.open("xtdata/y","w");
        file.writeLine(xt.y);
        file.close();
    end
    function saveF()
        if not autoSave then return; end
        local file=fs.open("xtdata/f","w");
        file.writeLine(xt.f);
        file.close();
    end
    function saveS()
        if not autoSave then return; end
        local file=fs.open("xtdata/s","w");
        file.writeLine(xt.s);
        file.close();
    end
    function savePos()
        if not autoSave then return; end
        saveXZ();
        saveY();
        saveF();
    end
    function save()
        if not autoSave then return; end
        saveXZ();
        saveY();
        saveF();
        saveS();
    end
    function setAutoSave(nas)
        autoSave=nas;
        local file=fs.open("xtdata/autosave","w");
        local tempAS;
        if autoSave then tempAS=1; else tempAS=0; end
        file.writeLine(tempAS);
        file.close();
    end

    function getFX(f)
        f=f or xt.f;
        if f==1 then return -1;
        elseif f==3 then return 1;
        else return 0; end
    end
    function getFZ(f)
        f=f or xt.f;
        if f==0 then return 1;
        elseif f==2 then return -1;
        else return 0; end
    end

    function fw(amount)
        if amount==nil then amount=1; end
        if amount<0 then bk(-amount); end
        for i=1,amount do
            if turtle.orig.forward() then
                xt.x=xt.x+getFX();
                xt.z=xt.z+getFZ();
                xt.saveXZ();
            else
                return false;
            end
        end
        return true;
    end
    function bk(amount)
        if amount==nil then amount=1; end
        if amount<0 then fw(-amount); end
        for i=1,amount do
            if turtle.orig.back() then
                xt.x=xt.x-getFX();
                xt.z=xt.z-getFZ();
                xt.saveXZ();
            else
                return false;
            end
        end
        return true;
    end

    function up(amount)
        if amount==nil then amount=1; end
        if amount<0 then dn(-amount); end
        for i=1,amount do
            if turtle.orig.up() then
                xt.y=xt.y+1;
                xt.saveY();
            else
                return false;
            end
        end
        return true;
    end
    function dn(amount)
        if amount==nil then amount=1; end
        if amount<0 then up(-amount); end
        for i=1,amount do
            if turtle.orig.down() then
                xt.y=xt.y-1;
                xt.saveY();
            else
                return false;
            end
        end
        return true;
    end

    function left(amount)
        if amount==nil then amount=1; end
        if amount<0 then right(-amount); end
        for i=1,amount do
            turtle.orig.turnLeft();
            xt.f=(xt.f-1)%4;
            xt.saveF();
        end
        return true;
    end
    function right(amount)
        if amount==nil then amount=1; end
        if amount<0 then left(-amount); end
        for i=1,amount do
            turtle.orig.turnRight();
            xt.f=(xt.f+1)%4;
            xt.saveF();
        end
        return true;
    end

    function sel(slot)
        if turtle.orig.select(slot) then
            xt.s=slot;
            xt.saveS();
        end
        return true;
    end

    fc={
    ["south"]=0,
    ["west"]=1,
    ["north"]=2,
    ["east"]=3,
    [0]="south",
    [1]="west",
    [2]="north",
    [3]="east"
    };
    function invertFace(facing)
        return (facing+2)%4;
    end
    function face(nf)
        if nf==nil then return false,"Not enough arguments"; end
        local fdif=nf-xt.f;
        if fdif==0 then return true;
        elseif fdif==3 then left();return true;
        elseif fdif==-3 then right(); return true;
        else right(fdif);return true; end
    end
    function gotoX(nx)
        if nx>xt.x then face(3) elseif nx<xt.x then face(1); else return true; end
        local dif=math.abs(nx-xt.x);
        return xt.fw(dif);
    end
    function gotoZ(nz)
        if nz>xt.z then face(0) elseif nz<xt.z then face(2); else return true; end
        local dif=math.abs(nz-xt.z);
        return xt.fw(dif);
    end
    function gotoY(ny)
        local func;
        if ny>xt.y then func=xt.up; elseif ny<xt.y then func=xt.dn; else return true; end
        local dif=math.abs(ny-xt.y);
        return func(dif);
    end

    function locate()
        local tx;
        local ty;
        local tz;
        tx,ty,tz=gps.locate();
        if tx==nil or ty==nil or tz==nil then return false; end
        xt.x=tx;
        xt.z=tz;
        saveXZ();
        xt.y=ty;
        saveY();
        return true;
    end
    function calibrate(forward,back,donealready)
        if turtle.getFuelLevel()~="unlimited" then
            if turtle.getFuelLevel()<=2 then return false,"Not enough fuel"; end
        end
        if donealready==nil then donealready=false; end
        if forward==nil then forward=xt.fw; end
        if back==nil then back=xt.bk; end
        local tx;
        local tz;
        if not locate() then return false,"Could not reach GPS"; end
        tx=xt.x;tz=xt.z;
        if not forward() then
            if donealready then return false,"Could not go forward";
            else return calibrate(back,forward,true); end
        end
        if not locate() then back(); return false,"Could not reach GPS"; end
        local dx=xt.x-tx;
        local dz=xt.z-tz;
        if donealready then dx=-dx;dz=-dz; end
        if dz==1 then xt.f=0;
        elseif dz==-1 then xt.f=2;
        elseif dx==1 then xt.f=3;
        elseif dx==-1 then xt.f=1;
        end
        saveF();
        back(); return true;
    end

    for k,v in pairs(turtle) do
        if k=="forward" then forward=fw;
        elseif k=="back" then back=bk;
        elseif k=="up" then
        elseif k=="down" then down=dn;
        elseif k=="turnLeft" then turnLeft=left;
        elseif k=="turnRight" then turnRight=right;
        elseif k=="select" then select=sel;
        else
            local env=getfenv();
            env[k]=v;
            setfenv(1,env);
        end
    end
    turtle.orig={};
    for k,v in pairs(turtle) do
        if k~="orig" then
            turtle.orig[k]=v;
        end
    end
    if replaceTurtle then
        turtle.forward=fw;
        turtle.back=bk;
        turtle.up=up;
        turtle.down=dn;
        turtle.turnLeft=left;
        turtle.turnRight=right;
        turtle.select=sel;
        replaceTurtle=nil;
    end
end