# This code was forked from the LiveJournal project owned and operated
# by Live Journal, Inc. The code has been modified and expanded by
# Dreamwidth Studios, LLC. These files were originally licensed under
# the terms of the license supplied by Live Journal, Inc, which can
# currently be found at:
#
# http://code.livejournal.org/trac/livejournal/browser/trunk/LICENSE-LiveJournal.txt
#
# In accordance with the original license, this code and all its
# modifications are provided under the GNU General Public License.
# A copy of that license can be found in the LICENSE file included as
# part of this distribution.

package LJ::ESN;
use strict;
use DW::Task::ESN::ProcessSub;
use LJ::Event;
use LJ::Subscription;

our $MAX_FILTER_SET = 5_000;

# Make DW::Tasks for matching subs.
sub tasks_of_unique_matching_subs {
    return map { DW::Task::ESN::ProcessSub->new(@$_) } unique_matching_subs(@_);
}

sub unique_matching_subs {
    my ( $class, $evt, @subs ) = @_;
    my %has_done = ();
    my @subjobs;

    my $params = $evt->raw_params;

    if ( $ENV{DEBUG} ) {
        warn "jobs of unique subs (@subs) matching event (@$params)\n";
    }

    my %related = map { $_ => 1 } $evt->related_events;

    foreach my $s (
        grep {
            $related{ $_->etypeid }
                ? bless( $evt, $_->event_class )->matches_filter($_)
                : $evt->matches_filter($_)
        } @subs
        )
    {

        next if $has_done{ $s->unique }++;
        push @subjobs, [
            $s->userid + 0,
            $s->id + 0,
            $params    # arrayref of event params
        ];
    }
    return @subjobs;
}

1;