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Pass client timezone as a cookie to properly format time

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This commit is contained in:
emanuele-f 2020-04-15 17:44:08 +02:00
parent 70ca600ed3
commit c6b43f1af3
7 changed files with 33 additions and 17 deletions
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18
scripts/lua/modules/lua_utils.lua
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@ -2564,8 +2564,14 @@ end
-- ####################################################
local cached_tz_offset_secs = nil
-- Get the local (backend) timezone offset in seconds
function getTzOffsetSeconds()
if(cached_tz_offset_secs ~= nil) then
return(cached_tz_offset_secs)
end
local now = os.time()
local local_t = os.date("*t", now)
local utc_t = os.date("!*t", now)
@ -2584,16 +2590,26 @@ function getTzOffsetSeconds()
-- tprint(string.format("local_t %u [%s][isdst: %s]", os.time(local_t), formatEpoch(os.time(local_t)), local_t.isdst))
-- tprint(string.format("utc_t %u [%s][isdst: %s]", os.time(utc_t), formatEpoch(os.time(utc_t)), utc_t.isdst))
cached_tz_offset_secs = delta
return delta
end
-- ####################################################
-- Get the delta between the frontend local time and the backend local time in seconds
function getFrontendTzDeltaSeconds(frontend_tz_offset)
function getFrontendTzDeltaSeconds()
local frontend_tz_offset = nil
if _COOKIE and _COOKIE.tzoffset then
-- The timezone offset can be passed from the client as a cookie.
-- This allows to format the dates in the frontend timezone.
frontend_tz_offset = tonumber(_COOKIE.tzoffset)
end
if frontend_tz_offset == nil then
return 0
end
return frontend_tz_offset - getTzOffsetSeconds()
end