utils/ion-statusd/statusd_mail.lua

   1 --
   2 -- ion/mod_statusbar/ion-statusd/statusd_mail.lua
   3 --
   4 -- Copyright (c) Tuomo Valkonen 2004-2009.
   5 --
   6 -- See the included file LICENSE for details.
   7 --
   8
   9 -- The keyword for this monitor
  10 local mon = "mail"
  11
  12 local defaults={
  13     update_interval=10*1000,
  14     retry_interval=60*10*1000,
  15     mbox = os.getenv("MAIL"),
  16     files = {}
  17 }
  18
  19 local settings=table.join(statusd.get_config(mon), defaults)
  20
  21 local function TR(s, ...)
  22     return string.format(statusd.gettext(s), unpack(arg))
  23 end
  24
  25 local function check_spool()
  26     if not settings.mbox then
  27         statusd.warn(TR("MAIL environment variable not set "..
  28                         "and no spool given."))
  29     end
  30 end
  31
  32 if not settings.files["spool"] then
  33     check_spool()
  34     settings.files["spool"] = settings.mbox
  35 elseif not(settings.files["spool"] == mbox) then
  36     statusd.warn(TR("%s.mbox does not match %s.files['spool']; using %s.mbox",
  37                     mon, mon, mon))
  38     check_spool()
  39     settings.files["spool"] = settings.mbox
  40 end
  41
  42 local function calcmail(fname)
  43     local f, err=io.open(fname, 'r')
  44     local total, read, old=0, 0, 0
  45     local had_blank=true
  46     local in_headers=false
  47     local had_status=false
  48
  49     if not f then
  50         statusd.warn(err)
  51         return
  52     end
  53
  54     for l in f:lines() do
  55         if had_blank and string.find(l, '^From ') then
  56             total=total+1
  57             had_status=false
  58             in_headers=true
  59             had_blank=false
  60         else
  61             had_blank=false
  62             if l=="" then
  63                 if in_headers then
  64                     in_headers=false
  65                 end
  66                 had_blank=true
  67             elseif in_headers and not had_status then
  68                 local st, en, stat=string.find(l, '^Status:(.*)')
  69                 if stat then
  70                     had_status=true
  71                     if string.find(l, 'R') then
  72                         read=read+1
  73                     end
  74                     if string.find(l, 'O') then
  75                         old=old+1
  76                     end
  77                 end
  78             end
  79         end
  80     end
  81
  82     f:close()
  83
  84     return total, total-read, total-old
  85 end
  86
  87
  88 local mail_timer
  89 local mail_timestamps = {}
  90 function init_timestamps ()
  91     for key, val in pairs(settings.files) do
  92         mail_timestamps[key]=-2.0
  93     end
  94 end
  95 init_timestamps()
  96
  97 local function update_mail()
  98     local failed
  99     for key, mbox in pairs(settings.files) do
 100         if not mbox then
 101             error(TR(key.." not set"))
 102         end
 103
 104         local old_tm=mail_timestamps[key]
 105         mail_timestamps[key]=statusd.last_modified(mbox)
 106
 107         if mail_timestamps[key]>old_tm then
 108             local mail_total, mail_unread, mail_new=calcmail(mbox)
 109             if failed == nil then
 110                 failed = not mail_total
 111             else
 112                 failed = failed and (not mail_total)
 113             end
 114
 115             if key == "spool" then
 116                 meter=mon
 117             else
 118                 meter=mon.."_"..key
 119             end
 120             if mail_total then
 121                 statusd.inform(meter.."_new", tostring(mail_new))
 122                 statusd.inform(meter.."_unread", tostring(mail_unread))
 123                 statusd.inform(meter.."_total", tostring(mail_total))
 124
 125                 if mail_new>0 then
 126                     statusd.inform(meter.."_new_hint", "important")
 127                 else
 128                     statusd.inform(meter.."_new_hint", "normal")
 129                 end
 130
 131                 if mail_unread>0 then
 132                     statusd.inform(meter.."_unread_hint", "important")
 133                 else
 134                     statusd.inform(meter.."_unread_hint", "normal")
 135                 end
 136             end
 137         end
 138     end
 139
 140     if failed then
 141         statusd.warn(TR("Disabling mail monitor for %d seconds.",
 142                         settings.retry_interval/1000))
 143         init_timestamps()
 144         mail_timer:set(settings.retry_interval, update_mail)
 145         return
 146     end
 147
 148     mail_timer:set(settings.update_interval, update_mail)
 149 end
 150
 151 mail_timer=statusd.create_timer()
 152 update_mail()
 153