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package OpenSLX::MetaDB::XML;
use strict;
use vars qw(@ISA @EXPORT $VERSION);
use Exporter;
$VERSION = 0.02;
@ISA = qw(Exporter);
@EXPORT = qw(
&metaConnectConfigDB &metaDisconnectConfigDB
&metaAddSystem
&metaFetchDBSchemaVersion &metaSchemaAddTable &metaSchemaDeclareTable
);
################################################################################
### private stuff required by this module
################################################################################
use Carp;
use DBI;
use OpenSLX::Base;
################################################################################
### basics
################################################################################
sub metaConnectConfigDB
{
my $dbParams = shift;
my $dbPath = $dbParams->{'db-path'}
|| '/home/zooey/Sources/openslx/config-db/datafiles-xml';
mkdir $dbPath;
vlog 1, "trying to connect to XML-database <$dbPath>";
my $dbh = DBI->connect("dbi:AnyData:",
undef, undef,
{PrintError => 0})
or confess _tr("Cannot connect to database <%s> (%s)"),
$dbPath, $DBI::errstr;
my $metaDB = {
'db-path' => $dbPath,
'dbi-dbh' => $dbh,
};
return $metaDB;
}
sub metaDisconnectConfigDB
{
my $metaDB = shift;
my $dbh = $metaDB->{'dbi-dbh'};
$dbh->disconnect;
}
################################################################################
### data access functions
################################################################################
sub metaFetchSystemsById
{
}
################################################################################
### data manipulation functions
################################################################################
sub metaDoInsert
{
my $metaDB = shift;
my $table = shift;
my $valRows = shift;
my $dbh = $metaDB->{'dbi-dbh'};
my $valRow = (@$valRows)[0];
return if !defined $valRow;
my $cols = join ', ', keys %$valRow;
print "cols: $cols\n";
my $placeholders = join ', ', map { '?' } keys %$valRow;
my $sql = "INSERT INTO $table ( $cols ) VALUES ( $placeholders )";
my $sth = $dbh->prepare($sql)
or confess _tr("Cannot insert into table <%s> (%s)", $table, $dbh->errstr);
foreach my $valRow (@$valRows) {
vlog 3, $sql;
my $vals = join ', ', values %$valRow;
print "vals: $vals\n";
$sth->execute(values %$valRow)
or confess _tr("Cannot insert into table <%s> (%s)",
$table, $dbh->errstr);
}
}
sub metaAddSystem
{
my $metaDB = shift;
my $valRows = shift;
metaDoInsert($metaDB, 'system', $valRows);
}
################################################################################
### schema related functions
################################################################################
sub metaFetchDBSchemaVersion
{
my $metaDB = shift;
my $dbh = $metaDB->{'dbi-dbh'};
local $dbh->{RaiseError} = 0;
my $sth = $dbh->prepare('SELECT schema_version FROM meta')
or return 0;
my $row = $sth->fetchrow_hashref();
return 0 unless defined $row;
# no entry in meta-table
return $row->{schema_version};
}
sub metaSchemaConvertTypeDescrToNative
{
my $typeDescr = lc(shift);
if ($typeDescr eq 'b') {
return 'integer';
} elsif ($typeDescr eq 'i') {
return 'integer';
} elsif ($typeDescr eq 'pk') {
return 'integer primary key';
} elsif ($typeDescr eq 'fk') {
return 'integer';
} elsif ($typeDescr =~ m[^s\.(\d+)$]i) {
return "varchar($1)";
} else {
confess _tr('UnknownDbSchemaTypeDescr', $typeDescr);
}
}
sub metaSchemaDeclareTable
{
my $metaDB = shift;
my $table = shift;
my $colDescrs = shift;
my $dbh = $metaDB->{'dbi-dbh'};
my $dbPath = $metaDB->{'db-path'};
my @colNames = map { my $col = $_; $col =~ s[:.+$][]; $col } @$colDescrs;
my $cols = join(', ', @colNames);
vlog 2, "declaring table <$table> as ($cols)...";
$dbh->func( $table, 'XML', "$dbPath/${table}.xml",
{ 'col_map' => [ @colNames ], 'pretty_print' => 'indented' },
'ad_catalog');
}
sub metaSchemaAddTable
{
my $metaDB = shift;
my $changeDescr = shift;
my $dbh = $metaDB->{'dbi-dbh'};
my $table = $changeDescr->{table};
vlog 2, "adding table <$table> to schema...";
my $cols =
join ', ',
map {
# convert each column description into database native format
# (e.g. convert 'name:s.45' to 'name char(45)'):
if (!m[^\s*(\S+)\s*:\s*(\S+)\s*$]) {
confess _tr('UnknownDbSchemaColumnDescr', $_);
}
"$1 ".metaSchemaConvertTypeDescrToNative($2);
}
@{$changeDescr->{cols}};
my $sql = "CREATE TABLE $changeDescr->{table} ($cols)";
vlog 3, $sql;
$dbh->do($sql)
or confess _tr("Cannot create table <%s> (%s)", $table, $dbh->errstr);
if (exists $changeDescr->{vals}) {
metaDoInsert($metaDB, $table, $changeDescr->{vals});
}
print "exporting...\n";
$dbh->func( $table, 'XML', "$metaDB->{'db-path'}/$table.xml",
{'pretty_print' => 'indented'}, 'ad_export');
print "exporting done\n";
}
1;
|
