Minecraft Computer Craft Visitor Log

-- The two corner points of an area
AreaCoords = {{x=6187, y=0, z=-10215}, {x=6078, y=255, z=-10116}}
-- List of player usernames to not log
BlackListPlayers = {"zkb1325"}

local pd = peripheral.find("playerDetector")

if fs.exists("visitorLog.txt") then
    local visitorFile = fs.open("visitorLog.txt", "r")
    VisitorLog = visitorFile.readAll()
    visitorFile.close()
    VisitorLog = textutils.unserialize(VisitorLog)
else
    VisitorLog = {}
end
CurrentlyVisiting = {}

local function inArray(value, table)
    for i,v in ipairs(table) do
        if v == value then return true end
    end

    return false
end

local function saveVisitorLog()
    local visitorFile = fs.open("visitorLog.txt", "w")
    visitorFile.write(textutils.serialize(VisitorLog))
    visitorFile.close()
end

local function currentVisitors()
    -- return pd.getPlayersInRange(2)
    return pd.getPlayersInCoords(AreaCoords[1], AreaCoords[2])
end

local function updateActive()
    for i,v in pairs(CurrentlyVisiting) do
        if CurrentlyVisiting[i]["active"] and not inArray(i, currentVisitors()) then
            CurrentlyVisiting[i]["active"] = false
            table.insert(VisitorLog[i][CurrentlyVisiting[i]["lastIndex"]], 2, os.date("%b %d %G %I:%M:%S %p"))
            table.insert(VisitorLog[i][CurrentlyVisiting[i]["lastIndex"]], 3, os.clock() - CurrentlyVisiting[i]["visitedAt"])
            -- VisitorLog[i][CurrentlyVisiting[i]["lastDate"]] = os.date("%b %d %G %I:%M:%S %p")
            saveVisitorLog()
            print(i.." has left the area at "..os.date("%b %d %G %I:%M:%S %p"))
        end
    end
end

while true do
    sleep(1)
    for i,v in ipairs(currentVisitors()) do
        if not inArray(v, BlackListPlayers) then
            if not CurrentlyVisiting[v] then
                CurrentlyVisiting[v] = {}
            end
            if not VisitorLog[v] then
                VisitorLog[v] = {}
            end
            if not CurrentlyVisiting[v]["active"] then
                CurrentlyVisiting[v]["active"] = true
                CurrentlyVisiting[v]["visitedAt"] = os.clock()
                CurrentlyVisiting[v]["lastIndex"] = #VisitorLog[v]+1
                VisitorLog[v][CurrentlyVisiting[v]["lastIndex"]] = {os.date("%b %d %G %I:%M:%S %p")}
                saveVisitorLog()
                print(v.." has entered the area at "..os.date("%b %d %G %I:%M:%S %p"))
            end
        end
    end
    updateActive()
end