-- Copyright (C) 2013 The Meme Factory, Inc., http://www.meme.com/
--
--    This file is part of Gombe-MI.
--
--    Gombe-MI 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 Gombe-MI.  If not, see <http://www.gnu.org/licenses/>.
--
-- Add to groups (but not groupmembers) for all (9am to 5pm)
-- intervals of follows 1-2, the first day's follows.
--
-- All data appearing in this work are fictitious. Any resemblance to
-- actual data, living or archived, is purely coincidental.
--
-- Karl O. Pinc <kop@meme.com>
--

--
-- Main tables.
--

do $$
declare
  this_time time;
  this_min int;
  this_diff int;
  this_gid int[];

begin
  this_time := '9:00';
  while this_time <= '17:00' loop

    this_min := extract('minute' from this_time);
    this_diff := this_min % 5;

    for fid in 1 .. 2 loop
      -- Give each of the follows' intervals a group.
      if this_diff = 0 then
        -- 5 minute mark, new group
        -- groups
        insert into groups (gid)
          values(nextval('groups_gid_seq'::regclass));

        this_gid[fid] := currval('groups_gid_seq'::regclass);
      end if;
  
      -- Connect the group to an interval.
      update intervals
        set gid = this_gid[fid]
        where followid = fid and time = this_time;

    end loop;
    
    this_time := this_time + '1 minute'::interval;
  end loop;
end;
$$;