Email maildir naughty hoover

I'd like to share a bit of code I wrote for my mail setup. I wanted something like the Delightful imap widget, but without the bloat of all the Delightful modules, that works with maildirs and in combination with vicious.

This module allows to wrap a naughty popup with maildir info around a widget in the style of Calendar_widget#Module_for_3.4. I'm currently using it in combination with the maildir widget from vicious, which I configured to display an envelope image in case i have new mail. placing the mouse over this widget then opens the naughty popup. here is a screenshot:

code and usage

I have a file "mailhoover.lua" wich contains the following. (get it here: https://github.com/pazz/configs/raw/master/.config/awesome/mailhoover.lua)

local string = string
--local print = print
local tostring = tostring
local io = io
local table = table
local pairs = pairs
local capi = {
    mouse = mouse,
    screen = screen
}
local awful = require("awful")
local naughty = require("naughty")
local beautiful = require('beautiful')
module("mailhoover")

local popup
local account_format = "<span color='" .. beautiful.fg_urgent .."'><b>%s</b></span>"
local dir_format = "<span color='" .. beautiful.fg_normal .."'><b>%s</b></span>"
local newmail_format = "<span color='" .. beautiful.fg_urgent .. "'>%s</span>"
local oldmail_format = "<span color='" .. beautiful.fg_focus .. "'>%s</span>"

function addToWidget(mywidget, maildirs, accountname)
  mywidget:add_signal('mouse::enter', function ()
        local info = read_maildirs(maildirs)
        popup = naughty.notify({
                title = string.format(account_format,accountname),
                text = info,
                timeout = 0,
                hover_timeout = 0.5,
                screen = capi.mouse.screen
        })
  end)
  mywidget:add_signal('mouse::leave', function () naughty.destroy(popup) end)
end
function read_maildirs(md)
    local info = ""
    local count = 0

    for i=1, #md do
        mdir = md[i]
        mails = {}
        -- Recursively find new messages
        local f = io.popen("find "..mdir.." -type f -wholename '*/new/*'")
        for line in f:lines() do 
            table.insert(mails,format_mail(newmail_format,line)) 
        end
        f:close()

        -- Recursively find "old" messages lacking the Seen flag
        local f = io.popen("find "..mdir.." -type f -regex '.*/cur/.*2,[^S]*$'")
        for line in f:lines() do 
            table.insert(mails,format_mail(oldmail_format,line))
        end
        f:close()

        if #mails>0 then info = info .. string.format(dir_format,mdir) .. ':\n' end
        for m=1, #mails do
            info = info .. mails[m]
        end
    end
   return info
end
function format_mail(template,mailpath)
    mailfile = io.open(mailpath,"r")
    for line in mailfile:lines() do
       if line:find("^Subject:") then subject = string.match(line, "^Subject: (.*)%s?") end
       if line:find("^From:") then 
           from = string.match(line, "^From: (.*)") 
           from = string.gsub(from, "<.*>","")
       end
    end
    mailfile:close()
    return string.format(" %-30s %s\n", from, subject)
end

This is part of my rc.lua.

require('mailhoover')
...
mailicon = widget({ type = 'imagebox', name = 'mailicon'})
mailfolders =   {
    '/home/pazz/mail/uoe/INBOX',
    '/home/pazz/mail/uoe/lists.seminars',
}
mailhoover.addToWidget(mailicon, mailfolders, ACCOUNTNAME')
vicious.register(mailicon, vicious.widgets.mdir,
function (widget, args)
        if args[1] > 0 then
                mailicon.image = image(beautiful.widget_mail)
        else
                mailicon.image = image(beautiful.widget_nomail)
        end
        return nil
end, 10, mailfolders)
mailbuttons = awful.util.table.join(
        awful.button({ }, 1, function () awful.util.spawn(mail_cmd) end)
)
mailicon:buttons(mailbuttons)

The important bit is the line

mailhoover.addToWidget(mailicon, mailfolders, 'ACCOUNTNAME')

that adds the mouseover effect to the widget "mailicon". the second argument is a table of maildir locations, the third is the title of the naughty-message. The colours used are taken from beautiful.fg_urgent,beautiful.fg_normal and beautiful.fg_focus.

non-features/bugs

• encoding problems: some subject lines still don't display correctly
• it would ne nice to have the popup triggered by a global keycombo instead of having to point the mouse over the widget
• vertical alignment of from and subject lines needs some fixing