SWE/Object/Document.pm

package SWE::Object::Document;
use strict;
use warnings;
use SWE::Lang qw/%ContentMediaType/;
use UNIVERSAL::require;

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

  return $self;
}

sub new_id ($%) {
  my $self = shift->new (@_);
  
  ## NOTE: MUST be executed in names_lock.

  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 reblessed : lvalue { $_[0]->{reblessed} }

sub rebless ($) {
  my $self = shift;
  return if $self->reblessed;

  my $ct = $self->content_media_type;
  my $module = $ContentMediaType{$ct}->{module} || $ContentMediaType{'text/x-suikawiki'}->{module};
  $module->require or die $@;
  bless $self, $module;

  $self->reblessed = 1;
}

sub content_media_type ($) {
  return 'text/x-suikawiki';
}

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

sub lock ($) {
  my $self = shift;
  my $lock = $self->{lock} ||= $self->{id_locks}->get_lock ($self->id); ## XXX
  $self->{lock_n}++ or $self->lock;
} # lock

sub unlock ($) {
  my $self = shift;
  my $lock = $self->{lock};
  $self->{lock_n}--;
  if ($lock and $self->{lock_n} <= 0) {
    $lock->unlock;
    delete $self->{lock};
    delete $self->{lock_n};
  }
} # unlock

for (qw/
  to_text to_text_media_type
  to_xml to_xml_media_type
  to_html_fragment
/) {
  eval qq{
    sub $_ {
      die "\$_[0]\->$_: Method not implmeneted\n";
    }
  };
}

1;
1	wakaba	1.1	package SWE::Object::Document;
2			use strict;
3			use warnings;
4	wakaba	1.7	use SWE::Lang qw/%ContentMediaType/;
5			use UNIVERSAL::require;
6	wakaba	1.1
7			sub new ($%) {
8			my $class = shift;
9			my $self = bless {@_}, $class;
10
11			return $self;
12			}
13
14	wakaba	1.3	sub new_id ($%) {
15			my $self = shift->new (@_);
16
17	wakaba	1.4	## NOTE: MUST be executed in names_lock.
18
19	wakaba	1.3	my $idgen = $self->db->id;
20			my $id = $idgen->get_next_id;
21			$self->{id} = $id;
22
23			return $self;
24			} # new_id
25
26	wakaba	1.1	sub db { $_[0]->{db} }
27
28			sub id { $_[0]->{id} }
29
30	wakaba	1.7	sub reblessed : lvalue { $_[0]->{reblessed} }
31
32			sub rebless ($) {
33			my $self = shift;
34			return if $self->reblessed;
35
36			my $ct = $self->content_media_type;
37			my $module = $ContentMediaType{$ct}->{module} \|\| $ContentMediaType{'text/x-suikawiki'}->{module};
38			$module->require or die $@;
39			bless $self, $module;
40
41			$self->reblessed = 1;
42			}
43
44			sub content_media_type ($) {
45			return 'text/x-suikawiki';
46			}
47
48	wakaba	1.1	sub associate_names ($$%) {
49			my ($self, $names, %args) = @_;
50
51			## NOTE: names_lock MUST be executed before the invocation.
52
53			my $id = $self->id;
54			my $time = $args{time} \|\| time;
55			my $sw3_pages = $self->{sw3_pages}; ## TODO: ...
56
57			my $vc = $self->db->vc;
58
59			my $name_prop_db = $self->{name_prop_db}; ## TODO: ...
60			local $name_prop_db->{version_control} = $vc;
61
62			my $name_history_db = $self->db->name_history;
63			local $name_history_db->{version_control} = $vc;
64
65			for my $name (keys %$names) {
66			my $name_props = $name_prop_db->get_data ($name);
67			unless (defined $name_props) {
68			my $sw3id = $sw3_pages->get_data ($name);
69			main::convert_sw3_page ($sw3id => $name); ## TODO: ...
70
71			$name_props = $name_prop_db->get_data ($name);
72			unless (defined $name_props) {
73			$name_history_db->append_data ($name => [$time, 'c']);
74			}
75			}
76
77			push @{$name_props->{id} \|\|= []}, $id;
78			$name_props->{name} = $name;
79			$name_prop_db->set_data ($name => $name_props);
80
81			$name_history_db->append_data ($name => [$time, 'a', $id]);
82			}
83
84			my $user = $args{user} \|\| '(anon)';
85			$vc->commit_changes ("id=$id created by $user");
86			} # associate_names
87
88	wakaba	1.2	sub update_tfidf ($$) {
89			my ($self, $doc) = @_; ## TODO: $doc should not be an argument
90
91			## It is REQUIRED to lock the $id before the invocation of this
92			## method to keep the consistency of tfidf data for the $id.
93
94			my $id = $self->id;
95
96			my $tfidf_db = $self->db->id_tfidf;
97
98			require SWE::Data::FeatureVector;
99
100			my $deleted_terms = SWE::Data::FeatureVector->parse_stringref
101			($tfidf_db->get_data ($id))->as_key_hashref;
102
103			my $tc = $doc->document_element->text_content;
104
105			## TODO: use element semantics...
106
107			my $orig_tfs = {};
108			my $all_terms = 0;
109			main::for_unique_words ($tc => sub {
110			$orig_tfs->{$_[0]} = $_[1];
111			$all_terms += $_[1];
112			}); ## TODO: XXX
113
114			my $names_index_db = $self->db->name_inverted_index;
115			$names_index_db->lock;
116
117			my $idgen = $self->db->id;
118			my $doc_number = $idgen->get_last_id;
119
120			my $terms = SWE::Data::FeatureVector->new;
121			for my $term (keys %$orig_tfs) {
122			my $n_tf = $orig_tfs->{$term} / $all_terms;
123
124			my $df = $names_index_db->get_count ($term);
125			my $idf = log ($doc_number / ($df + 1));
126
127			my $tfidf = $n_tf * $idf;
128
129			$terms->set_tfidf ($term, $tfidf);
130			$names_index_db->add_data ($term => $id => $tfidf);
131
132			delete $deleted_terms->{$term};
133			}
134
135			for my $term (keys %$deleted_terms) {
136			$names_index_db->delete_data ($term, $id);
137			}
138
139			$tfidf_db->set_data ($id => \( $terms->stringify ));
140			} # update_tfidf
141
142	wakaba	1.5	sub lock ($) {
143			my $self = shift;
144			my $lock = $self->{lock} \|\|= $self->{id_locks}->get_lock ($self->id); ## XXX
145			$self->{lock_n}++ or $self->lock;
146			} # lock
147
148			sub unlock ($) {
149			my $self = shift;
150			my $lock = $self->{lock};
151			$self->{lock_n}--;
152			if ($lock and $self->{lock_n} <= 0) {
153			$lock->unlock;
154			delete $self->{lock};
155			delete $self->{lock_n};
156			}
157			} # unlock
158
159	wakaba	1.7	for (qw/
160			to_text to_text_media_type
161			to_xml to_xml_media_type
162			to_html_fragment
163			/) {
164			eval qq{
165			sub $_ {
166			die "\$_[0]\->$_: Method not implmeneted\n";
167	wakaba	1.6	}
168	wakaba	1.7	};
169	wakaba	1.6	}
170
171	wakaba	1.1	1;