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package Catmandu::Store::ElasticSearch::Searcher;
use Catmandu::Sane;
our $VERSION = '1.0204';
use Moo;
use namespace::clean;
with 'Catmandu::Iterable';
has bag => (is => 'ro', required => 1);
has query => (is => 'ro', required => 1);
has start => (is => 'ro', required => 1);
has limit => (is => 'ro', required => 1);
has total => (is => 'ro');
has sort => (is => 'ro');
sub _paging_generator {
my ($self) = @_;
my $store = $self->bag->store;
my $es = $store->es;
my $id_key = $self->bag->id_key;
my $index = $self->bag->index;
my $type = $self->bag->type;
my $query = $self->query;
my $sort = $self->sort;
sub {
state $start = $self->start;
state $total = $self->total;
state $limit = $self->limit;
state $hits;
if (defined $total) {
return unless $total;
}
unless ($hits && @$hits) {
if ($total && $limit > $total) {
$limit = $total;
}
my $body = {query => $query, from => $start, size => $limit,};
$body->{sort} = $sort if defined $sort;
my %args = (index => $index, body => $body,);
if ($store->is_es_1_or_2) {
$args{type} = $self->type;
}
my $res = $es->search(%args);
$hits = $res->{hits}{hits};
$start += $limit;
}
if ($total) {
$total--;
}
my $doc = shift(@$hits) || return;
my $data = $doc->{_source};
$data->{$id_key} = $doc->{_id};
$data;
};
}
sub generator {
my ($self) = @_;
# scroll + from isn't supported in es > 1.2
if ($self->start) {
return $self->_paging_generator;
}
my $bag = $self->bag;
my $store = $bag->store;
my $id_key = $bag->id_key;
sub {
state $total = $self->total;
if (defined $total) {
return unless $total;
}
state $scroll = do {
my $body = {query => $self->query};
$body->{sort} = $self->sort if $self->sort;
my %args = (
index => $bag->index,
size => $bag->buffer_size, # TODO divide by number of shards
body => $body,
);
if (!$self->sort && $store->is_es_1_or_2) {
$args{search_type} = 'scan';
}
if ($store->is_es_1_or_2) {
$args{type} = $self->type;
}
$store->es->scroll_helper(%args);
};
my $doc = $scroll->next // do {
$scroll->finish;
return;
};
if ($total) {
$total--;
}
my $data = $doc->{_source};
$data->{$id_key} = $doc->{_id};
$data;
};
}
sub slice { # TODO constrain total?
my ($self, $start, $total) = @_;
$start //= 0;
$self->new(
bag => $self->bag,
query => $self->query,
start => $self->start + $start,
limit => $self->limit,
total => $total,
sort => $self->sort,
);
}
sub count {
my ($self) = @_;
my $bag = $self->bag;
my $store = $bag->store;
my %args = (index => $bag->index, body => {query => $self->query,},);
if ($store->is_es_1_or_2) {
$args{type} = $self->type;
}
$store->es->count(%args)->{count};
}
1;
__END__
=pod
=head1 NAME
Catmandu::Store::ElasticSearch::Bag - Searcher implementation for Elasticsearch
=head1 DESCRIPTION
This class isn't normally used directly. Instances are constructed using the store's C<searcher> method.
=head1 SEE ALSO
L<Catmandu::Iterable>
=cut
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