HLTIView

--This is the very basic libHLTI API. 2 functions, but they work!
--Since HLTI is actually just many Lua tables, we can use it like this:
local libHLTI = {}
libHLTI.GetValues = function(file)
    if not fs.exists(file) then
        error("HLTI file doesn't exist.")
    end

    local file = fs.open(file,'r')
    local values = textutils.unserialize(file.readAll())
    if not values then
        error("HLTI image is misconfigured/corrupted.")
    end

    file.close()
    return values
end

libHLTI.SetValue = function(file, key, value)
    if not fs.exists(file) then
        error("HLTI file doesn't exist.")
    end

    local currentValues = libHLTI.GetValues(file)
    currentValues[key] = value

    local file = fs.open(file, 'w')
    file.write(textutils.serialize(currentValues))
    file.close()
end

--Actual program
local function HLTI_Render(file)
    local hlti = libHLTI.GetValues(file)
    local hltiver = hlti["HLTIVer"]
    local width = hlti["Width"]
    local height = hlti["Height"]

    term.setBackgroundColor(colors.black)
    term.setTextColor(colors.white)
    term.clear()
    term.setCursorPos(1,1)

    write("HLTI Version: " .. hltiver .. " | ")
    print(width .. "x" .. height)

    local yOffset = 2

    local sectionCount = 0

    --Really bad rendering method. Sorry! :D
    while sectionCount < hlti["Sections"] do
        local v = hlti["Section" .. sectionCount]
        if v.Type == "Color" then
            if not v.BackgroundColor then v.BackgroundColor = colors.black end
            term.setCursorPos(v.X, v.Y + yOffset)
            term.setBackgroundColor(v.BackgroundColor)
            write(" ")
        end

        term.setCursorPos(1,2)
        term.setBackgroundColor(colors.black)
        write("Sector "..sectionCount .. "/" .. hlti["Sections"] .. " | X" .. v.X .. " Y" .. v.Y .. "  ") --spaces because of ghosting
        sectionCount = sectionCount + 1
        sleep(0)
    end
    return;
end

local tArgs = {...}
local ok, err = pcall(function()
HLTI_Render(tArgs[1]) --Kinda wanted to do this, I'll come up with something better soon.
end)
if not ok then
    printError("Something happened: " .. err)
end