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util/datetime.lua

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util/datetime.lua @ 13270:14bbfb2cc8dd default tip

lint: Teach luacheck about module:once Silence warning for using this introduced in 9c62ffbdf2ae
author Kim Alvefur <zash@zash.se>
date Sun, 15 Oct 2023 16:43:14 +0200
parent 12633:5d8b0e0b9d48
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rev   line source
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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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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 floor = math.floor;
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16 local tonumber = tonumber;
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17
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18 local _ENV = nil;
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19 -- luacheck: std none
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20
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21 local function date(t)
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22 return os_date("!%Y-%m-%d", t and floor(t) or nil);
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23 end
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24
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25 local function datetime(t)
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26 if t == nil or t % 1 == 0 then
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27 return os_date("!%Y-%m-%dT%H:%M:%SZ", t);
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28 end
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29 local m = t % 1;
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30 local s = floor(t);
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31 return os_date("!%Y-%m-%dT%H:%M:%S.%%06dZ", s):format(floor(m * 1000000));
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32 end
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33
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34 local function time(t)
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35 if t == nil or t % 1 == 0 then
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36 return os_date("!%H:%M:%S", t);
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37 end
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38 local m = t % 1;
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39 local s = floor(t);
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40 return os_date("!%H:%M:%S.%%06d", s):format(floor(m * 1000000));
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41 end
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42
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43 local function legacy(t)
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44 return os_date("!%Y%m%dT%H:%M:%S", t and floor(t) or nil);
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45 end
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46
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47 local function parse(s)
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48 if s then
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49 local 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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50 if year then
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51 local now = os_time();
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52 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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53 local tzd_offset = 0;
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54 if tzd ~= "" and tzd ~= "Z" then
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55 local sign, h, m = tzd:match("([+%-])(%d%d):?(%d*)");
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56 if not sign then return; end
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57 if #m ~= 2 then m = "0"; end
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58 h, m = tonumber(h), tonumber(m);
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59 tzd_offset = h * 60 * 60 + m * 60;
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60 if sign == "-" then tzd_offset = -tzd_offset; end
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61 end
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62 local prec = sec%1;
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63 sec = floor(sec + time_offset) - tzd_offset;
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64 return os_time({year=year, month=month, day=day, hour=hour, min=min, sec=sec, isdst=false})+prec;
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65 end
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66 end
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67 end
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68
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69 return {
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70 date = date;
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71 datetime = datetime;
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72 time = time;
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73 legacy = legacy;
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74 parse = parse;
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75 };