Warturtle

local sendChannel=666
local pingLimit=5

if fs.exists("events")==false then shell.run("pastebin get L7KYC10V events") end
if os.loadAPI("events")==false then error("Failed to load events API") end

if fs.exists("data")==false then shell.run("pastebin get 5FpayqrQ data") end
if os.loadAPI("data")==false then error("Failed to load data API") end

if fs.exists("utils")==false then shell.run("pastebin get c4CBkgKV utils") end
if os.loadAPI("utils")==false then error("Failed to load utils API") end

local self={
    facing="north",
    pos={x=0,y=0,z=0},
}

local whitelist={
    ["NanoBob_"]=true,
    ["DDerek"]=true,
    ["bas260"]=true,
    ["Ardron"]=true,
}

local sensor
local mainTimer

local facing={
    [0]="west","north","east","south","west","north",
    north=1,east=2,south=3,west=4,
}

function self.turn(direction,ammount)
    for i=1,ammount do
        if direction=="right" then
            turtle.turnRight()
            self.facing=facing[ facing[self.facing]+1 ]
        else
            turtle.turnLeft()
            self.facing=facing[ facing[self.facing]-1 ]
        end
    end
    data.set("facing",self.facing,"db/position")
end

function self.setFacing(targetFacing)
    local targetFacing=string.lower(targetFacing)
    local currentFacing=string.lower(self.facing)
    if targetFacing==currentFacing then
        return
    else
        local currentFacingIndex=facing[currentFacing]
        local facingIndex=facing[targetFacing]
        local turns=facingIndex-currentFacingIndex
        if turns<0 then
            turns=turns+4
        end
        if turns==3 then
            self.turn("left",1)
        else
            for i=1,turns do
                self.turn("right",1)
            end
        end
    end
end

function initPos()
    local facing=data.get("facing","db/position")
    if facing==nil then
        print("Please input facing:")
        io.write("facing: ")
        facing=read()
        data.set("facing",facing,"db/position")
    end
    self.facing=facing
end

function initSensor()
    sensor=peripheral.wrap("left")
end

function init()
    initPos()
    initSensor()
end
init()

function sensorHandle()

end

local messageHandles={

}

function handleMessages(side,channel,replyChannel,message)
    if replyChannel==nil then return end
    local messageType=utils.split(message,"|",1)
    if messageHandles[messageType]==nil then return end
    local returnMessage=messageHandles[messageType](replyChannel,message)
    if returnMessage==nil then return end
    wireless.transmit(replyChannel,localChannel,returnMessage)
end
events.addHandler("modem_message",handleMessages)

function searchForPlayers(id)
    if id==mainTimer then
        local players=sensor.getPlayers()
        for _,player in ipairs(players) do
            if whitelist[player.name]==nil then
                local data=sensor.getPlayerByName(player.name)
                if data==nil then break end
                local data=data.all()
                local pos=data.position
                pos.y=pos.y+1
                if pos.x>0.5 then
                    self.setFacing("east")
                    turtle.attack()
                    if pos.x>1 then
                        turtle.forward()
                    end
                elseif pos.x<-0.5 then
                    self.setFacing("west")
                    turtle.attack()
                    if pos.x<-1 then
                        turtle.forward()
                    end
                end
                if pos.y>0.5 then
                    turtle.attackUp()
                    if pos.y>-0.6 then
                        turtle.up()
                    end
                elseif pos.y<0 then
                    turtle.attackDown()
                    if pos.y<=-1.5 then
                        turtle.down()
                    end
                end
                if pos.z>0.5 then
                    self.setFacing("south")
                    turtle.attack()
                    if pos.z>1 then
                        turtle.forward()
                    end
                elseif pos.z<-0.5 then
                    self.setFacing("north")
                    turtle.attack()
                    if pos.z<-1 then
                        turtle.forward()
                    end
                end
                break
            end
        end
    end
end
events.addHandler("timer",timerExpired)

while true do
    searchForPlayers()
end