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package Wiki::Toolkit::Setup::Database;
use strict;
use Carp qw( croak );
use vars qw( $VERSION @SUPPORTED_SCHEMAS);
$VERSION = 0.11;
@SUPPORTED_SCHEMAS = qw( 10 11 );
=head1 NAME
Wiki::Toolkit::Setup::Database - parent class for database storage setup
classes for Wiki::Toolkit
=cut
# Fetch from schema version 10, and upgrade to version 11
sub fetch_upgrade_10_to_11 {
my $dbh = shift;
my %nodes;
my %metadatas;
my %contents;
my @internal_links;
print "Grabbing and upgrading old data... ";
# Grab all the nodes
my $sth = $dbh->prepare( "SELECT id,name,version,text,modified,moderate"
. " FROM node" );
$sth->execute;
while( my( $id, $name, $version, $text, $modified, $moderate) =
$sth->fetchrow_array ) {
$nodes{$name} = {
name => $name,
version => $version,
text => $text,
modified => $modified,
id => $id,
moderate => $moderate,
};
}
# Grab all the content
$sth = $dbh->prepare( "SELECT node_id,version,text,modified,comment,"
. "moderated FROM content" );
$sth->execute;
while ( my( $node_id, $version, $text, $modified, $comment, $moderated) =
$sth->fetchrow_array ) {
$contents{$node_id."-".$version} = {
node_id => $node_id,
version => $version,
text => $text,
modified => $modified,
comment => $comment,
moderated => $moderated,
};
}
# Grab all the metadata
$sth = $dbh->prepare( "SELECT node_id,version,metadata_type,metadata_value"
. " FROM metadata" );
$sth->execute;
my $i = 0;
while( my ( $node_id, $version, $metadata_type, $metadata_value ) =
$sth->fetchrow_array) {
$metadatas{$node_id."-".($i++)} = {
node_id => $node_id,
version => $version,
metadata_type => $metadata_type,
metadata_value => $metadata_value,
};
}
# Grab all the internal links
$sth = $dbh->prepare( "SELECT link_from,link_to FROM internal_links" );
$sth->execute;
while( my ( $link_from, $link_to ) = $sth->fetchrow_array ) {
push @internal_links, {
link_from => $link_from,
link_to => $link_to,
};
}
print "done\n";
# Return it all
return ( \%nodes, \%contents, \%metadatas, \@internal_links );
}
# Get the version of the database schema
sub get_database_version {
my $dbh = shift;
my $sql = "SELECT version FROM schema_info";
my $sth;
eval{ $sth = $dbh->prepare($sql) };
if($@) { croak_too_old(); }
eval{ $sth->execute };
if($@) { croak_too_old(); }
my ($cur_schema) = $sth->fetchrow_array;
if ( !$cur_schema || $cur_schema < $SUPPORTED_SCHEMAS[0] ) {
croak_too_old();
}
return $cur_schema;
}
sub croak_too_old {
croak "Database schema too old — must be at least version "
. $SUPPORTED_SCHEMAS[0];
}
# Is an upgrade to the database required?
sub get_database_upgrade_required {
my ($dbh,$new_version) = @_;
# Get the schema version
my $schema_version = get_database_version($dbh);
# Compare it
if($schema_version eq $new_version) {
# At latest version
return undef;
} elsif ( $schema_version < $new_version ) {
return $schema_version."_to_".$new_version;
} else {
die "Aiee! We seem to be trying to downgrade the database schema from $schema_version to $new_version. Aborting.\n";
}
}
# Put the latest data into the latest database structure
sub bulk_data_insert {
my ($dbh, $nodesref, $contentsref, $metadataref, $internallinksref) = @_;
print "Bulk inserting upgraded data... ";
# Add nodes
my $sth = $dbh->prepare("INSERT INTO node (id,name,version,text,modified,moderate) VALUES (?,?,?,?,?,?)");
foreach my $name (keys %$nodesref) {
my %node = %{$nodesref->{$name}};
$sth->execute($node{'id'},
$node{'name'},
$node{'version'},
$node{'text'},
$node{'modified'},
$node{'moderate'});
}
print "added ".(scalar keys %$nodesref)." nodes... ";
# Add content
$sth = $dbh->prepare("INSERT INTO content (node_id,version,text,modified,comment,moderated) VALUES (?,?,?,?,?,?)");
foreach my $key (keys %$contentsref) {
my %content = %{$contentsref->{$key}};
$sth->execute($content{'node_id'},
$content{'version'},
$content{'text'},
$content{'modified'},
$content{'comment'},
$content{'moderated'});
}
# Add metadata
$sth = $dbh->prepare("INSERT INTO metadata (node_id,version,metadata_type,metadata_value) VALUES (?,?,?,?)");
foreach my $key (keys %$metadataref) {
my %metadata = %{$metadataref->{$key}};
$sth->execute($metadata{'node_id'},
$metadata{'version'},
$metadata{'metadata_type'},
$metadata{'metadata_value'});
}
# Add internal links
$sth = $dbh->prepare("INSERT INTO internal_links (link_from,link_to) VALUES (?,?)");
foreach my $ilr (@$internallinksref) {
my %il = %{$ilr};
$sth->execute($il{'link_from'},
$il{'link_to'});
}
print "done\n";
}
sub perm_check {
my $dbh = shift;
# If we can do all this, we'll be able to do a bulk upgrade too
eval {
my $sth = $dbh->prepare("CREATE TABLE dbtest (test int)");
$sth->execute;
$sth = $dbh->prepare("CREATE INDEX dbtest_index ON dbtest (test)");
$sth->execute;
$sth = $dbh->prepare("DROP TABLE dbtest");
$sth->execute;
};
return $@;
}
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