prosody
87f6eabd90c9
util/datetime.lua

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util/datetime.lua @ 3745:87f6eabd90c9

util.serialization: Proper serialization of Infinity, -Infinity and NaN.
author Waqas Hussain <waqas20@gmail.com>
date Mon, 13 Dec 2010 20:45:08 +0500
parent 3643:2dc342a13f35
child 4250:7b456af75c77
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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b1885732e979 GPL->MIT!
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9
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10 -- XEP-0082: XMPP Date and Time Profiles
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11
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12 local os_date = os.date;
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13 local os_time = os.time;
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14 local os_difftime = os.difftime;
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15 local error = error;
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16 local tonumber = tonumber;
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17
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18 module "datetime"
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19
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20 function date(t)
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21 return os_date("!%Y-%m-%d", t);
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22 end
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23
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24 function datetime(t)
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25 return os_date("!%Y-%m-%dT%H:%M:%SZ", t);
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26 end
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27
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28 function time(t)
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29 return os_date("!%H:%M:%S", t);
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30 end
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31
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32 function legacy(t)
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33 return os_date("!%Y%m%dT%H:%M:%S", t);
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34 end
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35
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36 function parse(s)
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37 if s then
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38 local year, month, day, hour, min, sec, tzd;
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39 year, month, day, hour, min, sec, tzd = s:match("^(%d%d%d%d)-?(%d%d)-?(%d%d)T(%d%d):(%d%d):(%d%d)%.?%d*([Z+%-].*)$");
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40 if year then
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41 local time_offset = os_difftime(os_time(os_date("*t")), os_time(os_date("!*t"))); -- to deal with local timezone
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42 local tzd_offset = 0;
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43 if tzd ~= "" and tzd ~= "Z" then
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44 local sign, h, m = tzd:match("([+%-])(%d%d):?(%d*)");
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45 if not sign then return; end
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46 if #m ~= 2 then m = "0"; end
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47 h, m = tonumber(h), tonumber(m);
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48 tzd_offset = h * 60 * 60 + m * 60;
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49 if sign == "-" then tzd_offset = -tzd_offset; end
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50 end
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51 sec = (sec + time_offset) - tzd_offset;
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52 return os_time({year=year, month=month, day=day, hour=hour, min=min, sec=sec});
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53 end
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54 end
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55 end
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56
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57 return _M;