REVISIONATTIME{"topic" web="..." time="..."} -- returns the revision of a topic that was valid on a given date

• The macro will return the Foswiki revision as a number, that was valid on the time given to the macro.
• The time can be relative to the current time (always in the past) by giving a negative number in seconds.
• If you asks for a revision on date in the format DD Mmm YYYY without a time one minute the time will be set to one minute to midnight end of the given day.
• If the date given is older than the first revision of the topic, revision 0 is returned.
• Syntax: %REVISIONATTIME{"topic" web="webname" time="time format - see below"}%
• Supported parameters:

  Parameter:	Description:	Default:
  "topic"	The topic that is expanded. It can be prefixed by the web name in which case the web parameter is ignorred	Current topic
  web="webname"	The web of the topic to be expanded.	Current web
  time="time"	Time can be in the formats DD Mmm YYYY, or in epoch (seconds since 1 Jan 1970), or as a negative number in seconds relative to now. If no time is given the current time is assumed.	"0"

• Example - give the revision of 1 week ago : %REVISIONATTIME{"TemplateTestTemplate" time="-604800"}%
• Example of WikiUsers a week ago: %REVISIONATTIME{"Main.WikiUsers" time="-604800"}%
• Example of WikiUsers 01 Jan 2012: %REVISIONATTIME{"Main.WikiUsers" time="01 Jan 2012"}%
• Example of WikiUsers 01 Jan 1990: %REVISIONATTIME{"WikiUsers" web="Main" time="01 Jan 1990"}%
• Example of defaults: %REVISIONATTIME{}%