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util/datetime.lua @ 8776:e7d4344e0fea
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author | Kim Alvefur <zash@zash.se> |
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date | Wed, 02 May 2018 19:20:29 +0200 |
parent | 8555:4f0f5b49bb03 |
child | 9698:e616c37756b3 |
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 -- |
758 | 5 -- This project is MIT/X11 licensed. Please see the |
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 tonumber = tonumber; |
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16 |
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17 local _ENV = nil; |
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18 -- luacheck: std none |
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19 |
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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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23 |
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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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31 |
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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 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, isdst=false}); |
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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 { |
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58 date = date; |
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59 datetime = datetime; |
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60 time = time; |
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61 legacy = legacy; |
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62 parse = parse; |
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63 }; |