dtRdr::Annotation::SyncRules - rules engine

  my $sr = dtRdr::Annotation::SyncRules->new(
    current  => \@current,
    deleted  => \@deleted,
    manifest => \%s_man,
    error    => sub {die @_, "..."},
  );

  while(my @ans = $sr->next) {
    my ($action, $object) = @ans;
    # then do something with them
  }
  # and maybe something to finish

  my $sr = dtRdr::Annotation::SyncRules->new(
    current  => [@current],
    deleted  => [@deleted],
    manifest => {%s_man},
    error    => sub {die @_},
  )->init;

The references will be modified in-place, so deref accordingly.

FRESHEN is really just GET, but is an update. By definition, if we're talking to check_srev, we have it and so does the server.

  deleted:
    (implies mine)
    verify srev and DELETE; finish_delete

  current: (mine)
    shas:
      Y: check_srev ? PUT : FRESHEN :: NOOP # quaternary?
      N: has_prev ? (really_delete) : POST
  notmine:
    shas:
      Y: check_srev ? die : FRESHEN :: NOOP
      N: really_delete

Where:

  check_srev := {(rev > prev) ? ((srev > prev) ? CONFLICT : 1) :
    (srev > prev ? 0 : (srev < prev ? ERROR : SKIP)))}

Ok, so that's a ternary boolean. It returns true if we should push, false if we should pull, SKIP if nothing changed. (Aside: (srev < prev) is an error in-general and can be checked beforehand.)

What's left in the server manifest after that should be only new incoming annotations.

Returns one of FRESHEN|PUT|SKIP|CONFLICT

  my $ans = $self->check_srev($rev, $public_rev, $server_rev);

  my @ans = $sr->next;

  $self = $self->init;

  $self->error(@list);

Eric Wilhelm <ewilhelm at cpan dot org>

http://scratchcomputing.com/

Copyright (C) 2007 Eric L. Wilhelm and OSoft, All Rights Reserved.

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