updater

--pastebin get gxCvryX5 updater

local arg1, arg2, arg3 = ...
function saveTable(filePathIn, tableIn)
    local file = fs.open(filePathIn,"w")
    file.write(textutils.serialize(tableIn))
    file.close()
end
function loadTable(filePathIn)
    local file = fs.open(filePathIn,"r")
    local data = file.readAll()
    file.close()
    return textutils.unserialize(data)
end



local sPath = "UpdaterData.save"
local programs = {
    updater = "gxCvryX5"
}

if not fs.exists(sPath) then
    saveTable(sPath, programs)
end
programs = loadTable(sPath)

local function install(fileName)
    if not programs[fileName] then
        print("no file with name ", fileName)
        return
    end
    if fs.exists(fileName) then
        fs.delete(fileName)
    end
    shell.run("pastebin", "get", programs[fileName], fileName)
end

local function updateAll()
    for i,v in pairs(programs) do
        if fs.exists(i) then
            print("Updating program \""..tostring(i).."\" "..tostring(v))
            install(i)
            print()
        else
            print("Installing program \""..tostring(i).."\" "..tostring(v))
            install(i)
            print()
        end
    end
end
print()

if arg1 == "install" then
    install(arg2)
elseif arg1 == "list" then
    for i,v in pairs(programs) do
       print("\""..tostring(i).."\"", v)
    end
elseif arg1 == "add" then
    local input1, input2
    if not arg2 then
        print("Please type the name of the program.")
        input1 = read()
    else
        input1 = tostring(arg2)
    end
    if not arg3 then
        print("Please type the pastebin id of the program.")
        input2 = read()
    else
        input2 = tostring(arg3)
    end


    if input1 and input2 then
        print("Adding new program \""..input1.."\" "..input2.. " to installer.")
        programs[input1] = input2
    else
        print("Failed to add new program \""..tostring(input1).."\" "..tostring(input2))
    end
elseif arg1 == "remove" then
    print("Please type the name of the program.")
    input1 = read()
    if input1 then
        if (programs[input1]) then
            print("Removing \""..input1.."\" from the installer and uninstalling it.")
            if fs.exists(input1) then
                fs.delete(input1)
            end
            programs[input1] = nil
        else
            print("No program named \""..input1.."\" installed in the updater.")
        end
    else
        print("Failed. Input must not be nil")
    end
else

    print("Updating Everything...")
    updateAll()
end
saveTable(sPath, programs)
print()