+#
+# this file implements index functions using DBI
+# and huge amounts of memory for cache speedup
+#
+# this version doesn't support ident (which sould be location in
+# library). But, that functionality is not used anyway...
+#
+
+package index_DBI;
+use strict qw(vars);
+use vars qw($Count);
+use HTML::Entities;
+use URI::Escape;
+use locale;
+use Carp;
+
+use DBI;
+
+# bench time
+my $bench_time = time();
+
+my $debug = 1;
+
+sub bench {
+ my $self = shift;
+ my $msg = shift;
+
+ print STDERR "last operation took ",time()-$bench_time," seconds...\n";
+ $bench_time=time();
+ print STDERR "$msg\n";
+}
+
+sub new {
+ my $class = shift;
+ my $self = {};
+ bless($self, $class);
+
+ my $dbd = shift || die "need dbi_dbd= in [global] section of configuration file";
+ my $dsn = shift || die "need dbi_dsn= in [global] section of configuration file";
+ my $user = shift || die "need dbi_user= in [global] section of configuration file";
+ my $passwd = shift || die "need dbi_passwd= in [global] section of configuration file";
+
+ $self->{dbd} = $dbd;
+
+ $self->{dbh} = DBI->connect("DBI:$dbd:$dsn",$user,$passwd) || die $DBI::errstr;
+ $Count++;
+
+ $self->bench("connected to $dbd as $user");
+
+ # force SQLite to support binary 0 in data (which shouldn't
+ # happend, but it did to me)
+ eval {
+ no warnings 'all';
+ $self->{dbh}->{sqlite_handle_binary_nulls} = 1;
+ };
+
+ return $self;
+}
+
+sub delete_and_create {
+ my $self = shift;
+
+ my $index = shift || croak "need index name!";
+ my $sql = shift || croak "need sql to create table!";
+
+ print STDERR "## delete_and_create($index)\n" if ($debug);
+
+ my $sql_delete = "delete from $index";
+ my $sth = $self->{dbh}->prepare($sql_delete) || confess "can't prepare: $sql_delete";
+
+ if ($sth->execute()) {
+ print STDERR "## deleted rows from table $index\n" if ($debug);
+ } else {
+ # can't delete from table, assume it doesn't exists!
+ $self->{dbh}->rollback;
+ $self->{dbh}->do($sql) || confess "SQL: $sql ".$self->{dbh}->errstr();
+ print STDERR "## creating table $index\n" if ($debug);
+ $self->{dbh}->begin_work;
+ }
+}
+
+sub insert {
+ my $self = shift;
+
+ my $field = shift;
+ my $index_data = shift || print STDERR "\$index->insert($field,NULL,...)";
+ my $display = shift || $index_data;
+ my $filter = shift;
+
+ if (! $index_data) {
+ print STDERR "\$index->insert() -- no value to insert\n";
+ return;
+ }
+
+ $index_data =~ s#&(\w)(acute|cedil|circ|grave|ring|slash|tilde|uml);#$1#gi;
+
+ # strip spaces
+ $index_data =~ s#^\s+##;
+ $index_data =~ s#\s+$##;
+ $index_data =~ s#\s\s+# #g;
+
+ my $uc = uc($index_data);
+
+ if (! $self->{c}->{$uc}->{$field}) {
+#print stderr "in index: $index_data\n";
+ $self->{c}->{$uc}->{$field}->{item} = $index_data;
+ $self->{c}->{$uc}->{$field}->{display} = $display;
+ }
+
+ $self->{c}->{$uc}->{$field}->{count}++;
+ $self->{c}->{$uc}->{$field}->{filter}->{$filter}++ if ($filter);
+}
+
+sub count {
+ my $self = shift;
+
+ my $field = shift;
+ my $where = shift;
+
+ my $sql = "select count(*) from index where name = ? and upper(item) like upper(?)||'%'";
+
+ my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
+ $sth->execute($field,$where) || die "sql: $sql; ".$self->{dbh}->errstr();
+
+ my ($total) = $sth->fetchrow_array();
+
+ # no results, count all
+ if (! $total) {
+ my $sql = "select count(*) from index wheere name = ?";
+
+ my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
+ $sth->execute($field) || die "sql: $sql; ".$self->{dbh}->errstr();
+ $total = $sth->fetchrow_array();
+
+ }
+
+ return $total || 1;
+}
+
+
+sub fetch {
+ my $self = shift;
+
+ my $field = shift;
+ my $where = shift;
+
+ my $offset = shift || 0;
+ my $rows = shift || 10;
+ my $from_ord = 0;
+
+ my @sql_args;
+
+ my $sql = qq{
+ select item,display,count
+ from index
+ where name = ?
+ and ord > ?
+ order by ord
+ limit ? offset ?
+ };
+
+ if ($where) {
+ my $sql2 = "select ord from index where name = ? and upper(item) like upper(?)||'%'";
+ my $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
+
+ $sth->execute($field, $where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
+ if (my $row = $sth->fetchrow_hashref) {
+ $from_ord += $row->{ord} - 1;
+ } else {
+ # if no match is found when searching from beginning
+ # of word in index, try substring match anywhere
+ $sql2 = "select ord from index where name = ? and upper(item) like '% '||upper(?)||'%'";
+ $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
+ $sth->execute($field, $where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
+ if (my $row = $sth->fetchrow_hashref) {
+ $from_ord += $row->{ord} - 1;
+ }
+ }
+ }
+
+ my $sth = $self->{dbh}->prepare($sql) || die "prepare: $sql; ".$self->{dbh}->errstr();
+ $sth->execute($field,$from_ord,$rows,$offset) || die "execute: $sql; ".$self->{dbh}->errstr();
+ my @arr;
+ while (my $row = $sth->fetchrow_hashref) {
+ $row->{item} = HTML::Entities::encode($row->{item},' <>&"');
+ $row->{display} = HTML::Entities::encode($row->{display},'<>&"');
+ $row->{item} =~ s#&(\w)(acute|cedil|circ|grave|ring|slash|tilde|uml);#$1#gi;
+ $row->{display} =~ s#&(\w)(acute|cedil|circ|grave|ring|slash|tilde|uml);#&$1$2;#gi;
+ push @arr,$row;
+ }
+ return @arr;
+}
+
+sub close {
+ my $self = shift;
+
+ return if (! $self->{dbh});
+
+ $self->{dbh}->begin_work || die $self->{dbh}->errstr();
+
+ $self->delete_and_create('index', qq{
+ create table index (
+ name varchar(255),
+ ord int,
+ item text,
+ display text,
+ count int,
+ primary key (name,ord)
+ );
+ });
+
+ $self->delete_and_create('filters', qq{
+ create table filters (
+ filter varchar(255),
+ ord int,
+ count int,
+ primary key (filter,ord)
+ );
+ });
+
+ $self->bench("getting all entries");
+ my @items = keys %{$self->{c}};
+ $self->bench("got ".($#items+1)." items, now sorting");
+ @items = sort @items;
+
+ my $sql = "insert into index (name,ord,item,display,count) values (?,?,?,?,?)";
+ my $sth_index = $self->{dbh}->prepare($sql) || confess "$sql: ".$self->{dbh}->errstr();
+
+ $sql = "insert into filters (filter, ord, count) values (?,?,?)";
+ my $sth_filter = $self->{dbh}->prepare($sql) || confess "$sql: ".$self->{dbh}->errstr();
+
+ my $ord = 0;
+ foreach my $key (@items) {
+
+ foreach my $field (keys %{$self->{c}->{$key}}) {
+ # store items
+ $sth_index->execute(
+ $field,
+ ++$ord,
+ $self->{c}->{$key}->{$field}->{item},
+ $self->{c}->{$key}->{$field}->{display},
+ $self->{c}->{$key}->{$field}->{count},
+ );
+
+ # store filters
+ next unless ($self->{c}->{$key}->{$field}->{filter});
+
+ foreach my $filter (keys %{$self->{c}->{$key}->{$field}->{filter}}) {
+ $sth_filter->execute( $filter, $ord, $self->{c}->{$key}->{$field}->{filter}->{$filter} );
+ }
+ }
+
+
+ }
+
+ $self->{dbh}->commit || die $self->{dbh}->errstr();
+
+ $self->bench("vacuuming");
+
+ if ($self->{dbd} =~ m/(Pg|SQLite)/) {
+ $self->{dbh}->do(qq{vacuum}) || carp "vacumming failed. It shouldn't if you are using PostgreSQL or SQLite: ".$self->{dbh}->errstr();
+ }
+
+ $self->bench("disconnecting from database");
+
+ $self->{dbh}->disconnect;
+ undef $self->{dbh};
+}
+
+END {
+ $Count--;
+ print STDERR "index_DBI fatal error: \$index->close() not called... $Count references left!\n" if ($Count > 0);
+ # FIX: debug output
+# print STDERR "usage\ttable\n";
+# foreach (keys %Table) {
+# print STDERR $Table{$_},"\t$_\n";
+# }
+}
+
+1;
projects / webpac / commitdiff