prosody
87a684df4b65
util/datetime.lua

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util/datetime.lua @ 11437:87a684df4b65

util.datamapper: Invent extension for using tag name as value Useful for certain enum-like uses where the element name is the relevant information, e.g. chat states.
author Kim Alvefur <zash@zash.se>
date Sat, 06 Mar 2021 23:14:23 +0100
parent 9698:e616c37756b3
child 12629:4c1d3f817063
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Matthew Wild <mwild1@gmail.com>
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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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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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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 tonumber = tonumber;
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17 local _ENV = nil;
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18 -- luacheck: std none
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20 local 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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24 local 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 local 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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32 local 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 local 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 now = os_time();
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42 local time_offset = os_difftime(os_time(os_date("*t", now)), os_time(os_date("!*t", now))); -- to deal with local timezone
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43 local tzd_offset = 0;
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44 if tzd ~= "" and tzd ~= "Z" then
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45 local sign, h, m = tzd:match("([+%-])(%d%d):?(%d*)");
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46 if not sign then return; end
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47 if #m ~= 2 then m = "0"; end
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48 h, m = tonumber(h), tonumber(m);
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49 tzd_offset = h * 60 * 60 + m * 60;
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50 if sign == "-" then tzd_offset = -tzd_offset; end
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51 end
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52 sec = (sec + time_offset) - tzd_offset;
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53 return os_time({year=year, month=month, day=day, hour=hour, min=min, sec=sec, isdst=false});
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54 end
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55 end
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56 end
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57
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58 return {
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59 date = date;
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60 datetime = datetime;
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61 time = time;
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62 legacy = legacy;
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63 parse = parse;
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64 };