Doggy OS apps launcher

-- Get the current username from the status file
local function getCurrentUser()
    local file = fs.open(".currentusr", "r")
    if file then
        local username = file.readLine()
        file.close()
        return username
    else
        error("Failed to read current username")
    end
end

-- List all files in the user's packages directory
local function listPrograms(username)
    local packagePath = "/disk/users/" .. username .. "/packages"
    if not fs.exists(packagePath) then
        error("Packages directory not found")
    end

    local programs = fs.list(packagePath)
    if #programs == 0 then
        return nil
    end
    return programs
end

-- Draw the UI for the launcher
local function drawUI(programs, selected)
    term.clear()
    term.setCursorPos(1, 1)
    print("---- Program Launcher ----")
    print("Use UP/DOWN to navigate, ENTER to run, Q to quit.")

    -- Display programs in a list format
    for i, program in ipairs(programs) do
        if i == selected then
            term.setTextColor(colors.yellow)
            print("> " .. program)
            term.setTextColor(colors.white)
        else
            print("  " .. program)
        end
    end
end

-- Main loop to handle user input and selection
local function launcherUI(username, programs)
    local selected = 1
    drawUI(programs, selected)

    while true do
        local event, key = os.pullEvent("key")
        if key == keys.up then
            if selected > 1 then
                selected = selected - 1
                drawUI(programs, selected)
            end
        elseif key == keys.down then
            if selected < #programs then
                selected = selected + 1
                drawUI(programs, selected)
            end
        elseif key == keys.enter then
            local selectedProgram = programs[selected]
            shell.run("/disk/users/" .. username .. "/packages/" .. selectedProgram)
            break -- After running a program, quit the launcher
        elseif key == keys.q then
            break -- Quit the launcher
        end
    end
end

-- Main program execution
local function main()
    local username = getCurrentUser()
    local programs = listPrograms(username)

    if programs then
        launcherUI(username, programs)
    else
        term.clear()
        term.setCursorPos(1, 1)
        print("No programs found.")
    end
end

-- Execute the program
main()