#include "database-private.h"
#include "parse-time-vrp.h"
#include "parse-time-string.h"

#define PREFIX "date:"

/* See *ValueRangeProcessor in xapian-core/api/valuerangeproc.cc */
Xapian::valueno
ParseTimeValueRangeProcessor::operator() (std::string &begin, std::string &end)
{
    time_t t, now;

    /* Require date: prefix in start of the range... */
    if (STRNCMP_LITERAL (begin.c_str (), PREFIX))
	return Xapian::BAD_VALUENO;

    /* ...and remove it. */
    begin.erase (0, sizeof (PREFIX) - 1);

    /* Use the same 'now' for begin and end. */
    if (time (&now) == (time_t) -1)
	return Xapian::BAD_VALUENO;

    if (!begin.empty ()) {
	if (parse_time_string (begin.c_str (), &t, &now, PARSE_TIME_ROUND_DOWN))
	    return Xapian::BAD_VALUENO;

	begin.assign (Xapian::sortable_serialise ((double) t));
    }

    if (!end.empty ()) {
	if (parse_time_string (end.c_str (), &t, &now, PARSE_TIME_ROUND_UP_INCLUSIVE))
	    return Xapian::BAD_VALUENO;

	end.assign (Xapian::sortable_serialise ((double) t));
    }

    return valno;
}