58 lines
1.8 KiB
Lua
58 lines
1.8 KiB
Lua
----------------------------------------------------------
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-- Licensed under the GNU General Public License version 2
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-- * Copyright (C) 2009 Adrian C. <anrxc_sysphere_org>
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----------------------------------------------------------
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-- {{{ Grab environment
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local io = { open = io.open }
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local string = { find = string.find }
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-- }}}
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-- Mboxc: provides the count of total, old and new messages in a mbox
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module("vicious.mboxc")
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-- {{{ Mbox count widget type
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function worker(format, mbox)
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-- Initialise counters
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local old = 0
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local total = 0
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-- Open the mbox
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--
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-- If we had LuaFileSystem we could check the mtime and size of
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-- the file and if they didn't change since the last read we could
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-- return the old, cached, count. However, we didn't rely on extra
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-- libraries to this point so we won't start now.
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local f = io.open(mbox)
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while true do
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-- Read the mbox line by line, if we are going to read some
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-- *HUGE* folders then switch to reading chunks. It's why we are
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-- not reading the whole file at once in the first place.
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local lines = f:read("*line")
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if not lines then break end
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-- Find all messages
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-- * http://www.jwz.org/doc/content-length.html
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local _, from = string.find(lines, "^From[%s]")
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if from ~= nil then total = total + 1 end
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-- Read messages have the Status header
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local _, status = string.find(lines, "^Status:[%s]RO$")
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if status ~= nil then old = old + 1 end
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-- Skip the folder internal data
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local _, intdata = string.find(lines, "^Subject:[%s].*FOLDER[%s]INTERNAL[%s]DATA")
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if intdata ~= nil then total = total -1 end
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end
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f:close()
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-- Substract total from old to get the new count
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local new = total - old
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return {total, old, new}
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end
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-- }}}
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