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---[[
LuCI http protocol implementation - date helper class.

This class contains functions to parse, compare and format http dates.
]]
module "luci.http.protocol.date"

---[[
Return the time offset in seconds between the UTC and given time zone.

@class function
@name tz_offset
@param tz	Symbolic or numeric timezone specifier
@return		Time offset to UTC in seconds
]]

---[[
Parse given HTTP date string and convert it to unix epoch time.

@class function
@name to_unix
@param data	String containing the date
@return		Unix epoch time
]]

---[[
Convert the given unix epoch time to valid HTTP date string.

@class function
@name to_http
@param time	Unix epoch time
@return		String containing the formatted date
]]

---[[
Compare two dates which can either be unix epoch times or HTTP date strings.

@class function
@name compare
@param d1	The first date or epoch time to compare
@param d2	The first date or epoch time to compare
@return		-1  -  if d1 is lower then d2
@return		0   -  if both dates are equal
@return		1   -  if d1 is higher then d2
]]