awesome/awesome-wm-widgets/email-widget/email.lua

local os = require("os")
local wibox = require("wibox")
local awful = require("awful")
local naughty = require("naughty")
local watch = require("awful.widget.watch")

local path_to_icons = "/usr/share/icons/Arc/actions/22/"

local home = os.getenv('HOME')

local email_widget = wibox.widget.textbox()
email_widget:set_font('Play 9')

local email_icon = wibox.widget.imagebox()
email_icon:set_image(path_to_icons .. "/mail-mark-new.png")

local previous_value = 0

watch(
    "bash -c " .. home .. "/.config/awesome/awesome-wm-widgets/email-widget/count_unread_emails.py", 60,
    function(widget, stdout, stderr, exitreason, exitcode)
        local unread_emails_num = tonumber(stdout) or 0

        if previous_value < unread_emails_num then
            previous_value = unread_emails_num
            show_emails(10)
        end

        email_widget:set_text(stdout)
        if (unread_emails_num > 0) then
            email_icon:set_image(path_to_icons .. "/mail-mark-unread.png")
        elseif (unread_emails_num == 0) then
            email_icon:set_image(path_to_icons .. "/mail-message-new.png")
        end
    end
)


function show_emails(timeout)
    awful.spawn.easy_async_with_shell(home .. "/.config/awesome/awesome-wm-widgets/email-widget/read_unread_emails.py",
        function(stdout, stderr, reason, exit_code)
            naughty.notify{
                text = stdout,
                title = "Unread Emails",
                timeout = timeout,
                width = 400,
            }
        end
    )
end

email_icon:connect_signal("button::press", function() show_emails(5) end)

return {
    icon = email_icon,
    widget = email_widget
}