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// $Id: Calendar.hh 2641 2007-09-02 21:31:02Z flaterco $
/* Calendar Manage construction, organization, and printing of calendars.
Copyright (C) 1998 David Flater.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class Calendar {
public:
static Calendar * const factory (Station &station,
Timestamp startTime,
Timestamp endTime,
Mode::Mode mode,
Format::Format form);
virtual ~Calendar();
virtual void print (Dstr &text_out) = 0;
protected:
const Mode::Mode _mode;
/*
Traversing a TideEventsOrganizer using Timestamp::nextDay to locate
day boundaries works 99.999% of the time, give or take a 9, but it's
still wrong. The assumption that the date will increase
monotonically when expressed in local time is false.
For example, the following timestamps are in chronological order for
the time zone :America/St_Johns:
1990-10-27 23:59 NDT
1990-10-28 00:00 NDT
1990-10-27 23:01 NST
...
1990-10-27 23:59 NST
1990-10-28 00:00 NST
It's October 28th for one minute and then it's October 27th again.
The clock is set back one hour not at midnight, but at one minute
past midnight. From tzdata2007a:
# Newfoundland and Labrador
# Rule NAME FROM TO TYPE IN ON AT SAVE
Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D
Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S
Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD
Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D
The correct model is to index by day instead of by Timestamp, then
sort by Timestamp within each day.
For additional complications see the commentary in Calendar.cc.
*/
BetterMap<const Date, SafeVector<TideEvent> > eventVectors;
Station &_station;
const Dstr timezone;
Date firstDay, lastDay;
Calendar (Station &station,
Timestamp startTime,
Timestamp endTime,
Mode::Mode mode,
Format::Format form);
private:
// Prohibited operations not implemented.
Calendar (const Calendar &);
Calendar &operator= (const Calendar &);
};
// Cleanup2006 Done
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