SWE/Object/Document.pm

package SWE::Object::Document;
use strict;
use warnings;

sub new ($%) {
  my $class = shift;
  my $self = bless {@_}, $class;

  return $self;
}

sub new_id ($%) {
  my $self = shift->new (@_);
  
  my $idgen = $self->db->id;
  my $id = $idgen->get_next_id;
  $self->{id} = $id;

  return $self;
} # new_id

sub db { $_[0]->{db} }

sub id { $_[0]->{id} }

sub associate_names ($$%) {
  my ($self, $names, %args) = @_;

  ## NOTE: names_lock MUST be executed before the invocation.

  my $id = $self->id;
  my $time = $args{time} || time;
  my $sw3_pages = $self->{sw3_pages}; ## TODO: ...

  my $vc = $self->db->vc;

  my $name_prop_db = $self->{name_prop_db}; ## TODO: ...
  local $name_prop_db->{version_control} = $vc;

  my $name_history_db = $self->db->name_history;
  local $name_history_db->{version_control} = $vc;
  
  for my $name (keys %$names) {
    my $name_props = $name_prop_db->get_data ($name);
    unless (defined $name_props) {
      my $sw3id = $sw3_pages->get_data ($name);
      main::convert_sw3_page ($sw3id => $name); ## TODO: ...
      
      $name_props = $name_prop_db->get_data ($name);
      unless (defined $name_props) {
        $name_history_db->append_data ($name => [$time, 'c']);
      }
    }
    
    push @{$name_props->{id} ||= []}, $id;
    $name_props->{name} = $name;
    $name_prop_db->set_data ($name => $name_props);
    
    $name_history_db->append_data ($name => [$time, 'a', $id]);
  }

  my $user = $args{user} || '(anon)';
  $vc->commit_changes ("id=$id created by $user");
} # associate_names

sub update_tfidf ($$) {
  my ($self, $doc) = @_; ## TODO: $doc should not be an argument

  ## It is REQUIRED to lock the $id before the invocation of this
  ## method to keep the consistency of tfidf data for the $id.

  my $id = $self->id;

  my $tfidf_db = $self->db->id_tfidf;

  require SWE::Data::FeatureVector;

  my $deleted_terms = SWE::Data::FeatureVector->parse_stringref
      ($tfidf_db->get_data ($id))->as_key_hashref;

  my $tc = $doc->document_element->text_content;

  ## TODO: use element semantics...

  my $orig_tfs = {};
  my $all_terms = 0;
  main::for_unique_words ($tc => sub {
    $orig_tfs->{$_[0]} = $_[1];
    $all_terms += $_[1];
  }); ## TODO: XXX

  my $names_index_db = $self->db->name_inverted_index;
  $names_index_db->lock;

  my $idgen = $self->db->id;
  my $doc_number = $idgen->get_last_id;
  
  my $terms = SWE::Data::FeatureVector->new;
  for my $term (keys %$orig_tfs) {
    my $n_tf = $orig_tfs->{$term} / $all_terms;
    
    my $df = $names_index_db->get_count ($term);
    my $idf = log ($doc_number / ($df + 1));
      
    my $tfidf = $n_tf * $idf;
    
    $terms->set_tfidf ($term, $tfidf);
    $names_index_db->add_data ($term => $id => $tfidf);

    delete $deleted_terms->{$term};
  }

  for my $term (keys %$deleted_terms) {
    $names_index_db->delete_data ($term, $id);
  }
  
  $tfidf_db->set_data ($id => \( $terms->stringify ));
} # update_tfidf

1;
1	wakaba	1.1	package SWE::Object::Document;
2			use strict;
3			use warnings;
4
5			sub new ($%) {
6			my $class = shift;
7			my $self = bless {@_}, $class;
8
9			return $self;
10			}
11
12	wakaba	1.3	sub new_id ($%) {
13			my $self = shift->new (@_);
14
15			my $idgen = $self->db->id;
16			my $id = $idgen->get_next_id;
17			$self->{id} = $id;
18
19			return $self;
20			} # new_id
21
22	wakaba	1.1	sub db { $_[0]->{db} }
23
24			sub id { $_[0]->{id} }
25
26			sub associate_names ($$%) {
27			my ($self, $names, %args) = @_;
28
29			## NOTE: names_lock MUST be executed before the invocation.
30
31			my $id = $self->id;
32			my $time = $args{time} \|\| time;
33			my $sw3_pages = $self->{sw3_pages}; ## TODO: ...
34
35			my $vc = $self->db->vc;
36
37			my $name_prop_db = $self->{name_prop_db}; ## TODO: ...
38			local $name_prop_db->{version_control} = $vc;
39
40			my $name_history_db = $self->db->name_history;
41			local $name_history_db->{version_control} = $vc;
42
43			for my $name (keys %$names) {
44			my $name_props = $name_prop_db->get_data ($name);
45			unless (defined $name_props) {
46			my $sw3id = $sw3_pages->get_data ($name);
47			main::convert_sw3_page ($sw3id => $name); ## TODO: ...
48
49			$name_props = $name_prop_db->get_data ($name);
50			unless (defined $name_props) {
51			$name_history_db->append_data ($name => [$time, 'c']);
52			}
53			}
54
55			push @{$name_props->{id} \|\|= []}, $id;
56			$name_props->{name} = $name;
57			$name_prop_db->set_data ($name => $name_props);
58
59			$name_history_db->append_data ($name => [$time, 'a', $id]);
60			}
61
62			my $user = $args{user} \|\| '(anon)';
63			$vc->commit_changes ("id=$id created by $user");
64			} # associate_names
65
66	wakaba	1.2	sub update_tfidf ($$) {
67			my ($self, $doc) = @_; ## TODO: $doc should not be an argument
68
69			## It is REQUIRED to lock the $id before the invocation of this
70			## method to keep the consistency of tfidf data for the $id.
71
72			my $id = $self->id;
73
74			my $tfidf_db = $self->db->id_tfidf;
75
76			require SWE::Data::FeatureVector;
77
78			my $deleted_terms = SWE::Data::FeatureVector->parse_stringref
79			($tfidf_db->get_data ($id))->as_key_hashref;
80
81			my $tc = $doc->document_element->text_content;
82
83			## TODO: use element semantics...
84
85			my $orig_tfs = {};
86			my $all_terms = 0;
87			main::for_unique_words ($tc => sub {
88			$orig_tfs->{$_[0]} = $_[1];
89			$all_terms += $_[1];
90			}); ## TODO: XXX
91
92			my $names_index_db = $self->db->name_inverted_index;
93			$names_index_db->lock;
94
95			my $idgen = $self->db->id;
96			my $doc_number = $idgen->get_last_id;
97
98			my $terms = SWE::Data::FeatureVector->new;
99			for my $term (keys %$orig_tfs) {
100			my $n_tf = $orig_tfs->{$term} / $all_terms;
101
102			my $df = $names_index_db->get_count ($term);
103			my $idf = log ($doc_number / ($df + 1));
104
105			my $tfidf = $n_tf * $idf;
106
107			$terms->set_tfidf ($term, $tfidf);
108			$names_index_db->add_data ($term => $id => $tfidf);
109
110			delete $deleted_terms->{$term};
111			}
112
113			for my $term (keys %$deleted_terms) {
114			$names_index_db->delete_data ($term, $id);
115			}
116
117			$tfidf_db->set_data ($id => \( $terms->stringify ));
118			} # update_tfidf
119
120	wakaba	1.1	1;