perl/libs/libdb.pm

##    --------------------------------------------------------------------------------
##    $Id: libdb.pm,v 1.2 2002/07/20 11:09:58 cvsjoko Exp $
##    --------------------------------------------------------------------------------
##    $Log: libdb.pm,v $
##    Revision 1.2  2002/07/20 11:09:58  cvsjoko
##    + bugfixes
##    + dont' print sql-errors
##
##    Revision 1.1  2002/07/19 18:14:03  cvsjoko
##    no message
##
##
##    --------------------------------------------------------------------------------

package libdb;

use strict;
use warnings;

use libp;
use DBI;

require Exporter;
our @ISA = qw( Exporter );
our @EXPORT = qw( 
                              testDsn hash2Sql 
                              SQL_INSERT SQL_UPDATE
                              connectTarget disconnectTarget sendSql
                              dbNow
                              getDbNameByDsn sqlDbAction createSqlDb dropSqlDb
                              quotesql
                              testDsnForTables
                              );

use constant SQL_INSERT => 10;
use constant SQL_UPDATE => 11;

my $dbmeta_ref_cache;

sub testDsn {
  my $dsn = shift;
  my $result;
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      PrintError => 0,
                                                      } ) ) {
    $dbh->disconnect();
    return 1;
  }
}

sub hash2Sql {
  
  my $table = shift;
  my $hash = shift;
  my $mode = shift;
  my $crit = shift;
  
  my $sql;
  if ($mode == SQL_INSERT) {
    $sql = "INSERT INTO $table (#fields#) VALUES (#values#);";
  }
  if ($mode == SQL_UPDATE) {
    $sql = "UPDATE $table SET #fields-values# WHERE $crit;";
  }
  
  my (@fields, @values);
  foreach my $key (keys %{$hash}) {
    push @fields, $key;
    push @values, $hash->{$key};
  }
  # quote each element
  map { if (defined $_) { $_ = "'$_'" } else { $_ = "null" } } @values;
  
  my $fields = join(', ', @fields);
  my $values = join(', ', @values);
  my $fields_values = '';
  my $fc = 0;
  foreach (@fields) {
    $fields_values .= $_ . '=' . $values[$fc] . ', ';
    $fc++;
  }
  $fields_values = substr($fields_values, 0, -2);
  
  $sql =~ s/#fields#/$fields/;
  $sql =~ s/#values#/$values/;
  $sql =~ s/#fields-values#/$fields_values/;
  
  return $sql;
}

sub patch_dbmeta {
  
  my $dbmeta = shift;

  if ($dbmeta =~ m/^dbi:/) {
    $dbmeta = {
      dsn => $dbmeta,
      trace_level => 0,
      trace_file => undef,
    };
  }
  
  return $dbmeta;
  
}

sub connectTarget {
  my $dbmeta = shift;
  croak "please supply a dsn or a \"dbmeta\"-hash" if (!$dbmeta);
  $dbmeta = patch_dbmeta($dbmeta);
  if (!$dbmeta->{connected}) {
    if ($dbmeta->{dbh} = DBI->connect($dbmeta->{dsn}, '', '', { PrintError => 0 } )) {
      $dbmeta->{dbh}->trace($dbmeta->{trace_level}, $dbmeta->{trace_file});
      $dbmeta->{dbh}->{PrintError} = 0;
      $dbmeta->{connected} = 1;
      $dbmeta_ref_cache = $dbmeta;
      return 1;
    }
  }
}

sub disconnectTarget {
  #my $dbmeta = shift;
  #croak "please supply a \"dbmeta\"-hash" if (!$dbmeta);
  #$dbmeta = patch_dbmeta($dbmeta);
  #$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
  my $dbmeta = $dbmeta_ref_cache;
  $dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
  undef($dbmeta_ref_cache);
}

sub sendSql {
  my $sql = shift;
  my $dbmeta_ref = shift;
  if (!$dbmeta_ref) { 
    $dbmeta_ref = $dbmeta_ref_cache;
  }
  #print "sql: $sql", "\n";
  if (!$dbmeta_ref->{connected}) {
    print "not connected!", "\n";
    return 0;
  }
  if (my $result = $dbmeta_ref->{dbh}->prepare($sql)) {
    if ($result->execute()) {
      return $result;
    }
  }
}

sub dbNow {
  #my $now_string = strftime "%a %b %e %H:%M:%S %Y", localtime;
  my $now_string = strftime("%Y-%m-%d %H:%M:%S", localtime);
  return $now_string;
}


sub getDbNameByDsn {
  my $dsn = shift;
  $dsn =~ m/database=(.+?);/;
  my $database_name = $1;
  return $database_name;
}

sub sqlDbAction {
  my $dsn = shift;
  $dsn =~ s/database=.+?;//;
  my $sql = shift;
  my $dbmeta = {
    dsn => $dsn,
    trace_level => 1,
    trace_file => 'dbitrace',
  };
  my $bool_ok;
  if (connectTarget($dbmeta)) {
    sendSql($sql);
    #print "state: ", $dbmeta->{dbh}->state, "\n";
    #print "err    ", $dbmeta->{dbh}->err, "\n";
    #$bool_ok = ($dbmeta->{dbh} && $dbmeta->{dbh}->state && !$dbmeta->{dbh}->err);
    $bool_ok = ($dbmeta->{dbh} && !$dbmeta->{dbh}->err);
    disconnectTarget($dbmeta);
  }
  return $bool_ok;
}

sub createSqlDb {
  my $dsn = shift;
  my $dbname = getDbNameByDsn($dsn);
  print "  - creating rdbms-database $dbname ($dsn) ...";
  my $sql;
  $sql = "CREATE DATABASE $dbname;";
  if ( sqlDbAction($dsn, $sql) ) {
    print "ok", "\n";
    return 1;
  } else {
    print "failed", "\n";
    return 0;
  }
}

sub dropSqlDb {
  my $dsn = shift;
  my $dbname = getDbNameByDsn($dsn);
  print "  - dropping database $dbname", "\n";
  my $sql;
  $sql = "DROP DATABASE $dbname;";
  sqlDbAction($dsn, $sql);
}

sub quotesql {
  my $string = shift;
  $string =~ s/'/\\'/g;
  return $string;
}

sub testDsnForTables {
  my $dsn = shift;
  connectTarget($dsn);
  my $result = sendSql('SHOW TABLES;');
  my $bool_tablesHere = $result->fetchrow_hashref();
  $result->finish();
  disconnectTarget($dsn);
  return 1 if ($bool_tablesHere);
}

1;
1	cvsjoko	1.1	## --------------------------------------------------------------------------------
2	cvsjoko	1.3	## $Id: libdb.pm,v 1.2 2002/07/20 11:09:58 cvsjoko Exp $
3	cvsjoko	1.1	## --------------------------------------------------------------------------------
4	cvsjoko	1.2	## $Log: libdb.pm,v $
5	cvsjoko	1.3	## Revision 1.2 2002/07/20 11:09:58 cvsjoko
6			## + bugfixes
7			## + dont' print sql-errors
8			##
9	cvsjoko	1.2	## Revision 1.1 2002/07/19 18:14:03 cvsjoko
10			## no message
11			##
12	cvsjoko	1.1	##
13			## --------------------------------------------------------------------------------
14
15			package libdb;
16
17			use strict;
18			use warnings;
19
20			use libp;
21			use DBI;
22
23			require Exporter;
24			our @ISA = qw( Exporter );
25			our @EXPORT = qw(
26			testDsn hash2Sql
27			SQL_INSERT SQL_UPDATE
28			connectTarget disconnectTarget sendSql
29			dbNow
30			getDbNameByDsn sqlDbAction createSqlDb dropSqlDb
31			quotesql
32			testDsnForTables
33			);
34
35			use constant SQL_INSERT => 10;
36			use constant SQL_UPDATE => 11;
37
38			my $dbmeta_ref_cache;
39
40			sub testDsn {
41			my $dsn = shift;
42			my $result;
43			if ( my $dbh = DBI->connect($dsn, '', '', {
44			PrintError => 0,
45			} ) ) {
46			$dbh->disconnect();
47			return 1;
48			}
49			}
50
51			sub hash2Sql {
52
53			my $table = shift;
54			my $hash = shift;
55			my $mode = shift;
56			my $crit = shift;
57
58			my $sql;
59			if ($mode == SQL_INSERT) {
60			$sql = "INSERT INTO $table (#fields#) VALUES (#values#);";
61			}
62			if ($mode == SQL_UPDATE) {
63			$sql = "UPDATE $table SET #fields-values# WHERE $crit;";
64			}
65
66			my (@fields, @values);
67			foreach my $key (keys %{$hash}) {
68			push @fields, $key;
69			push @values, $hash->{$key};
70			}
71			# quote each element
72			map { if (defined $_) { $_ = "'$_'" } else { $_ = "null" } } @values;
73
74			my $fields = join(', ', @fields);
75			my $values = join(', ', @values);
76			my $fields_values = '';
77			my $fc = 0;
78			foreach (@fields) {
79			$fields_values .= $_ . '=' . $values[$fc] . ', ';
80			$fc++;
81			}
82			$fields_values = substr($fields_values, 0, -2);
83
84			$sql =~ s/#fields#/$fields/;
85			$sql =~ s/#values#/$values/;
86			$sql =~ s/#fields-values#/$fields_values/;
87
88			return $sql;
89			}
90
91			sub patch_dbmeta {
92
93			my $dbmeta = shift;
94
95			if ($dbmeta =~ m/^dbi:/) {
96			$dbmeta = {
97			dsn => $dbmeta,
98			trace_level => 0,
99			trace_file => undef,
100			};
101			}
102
103			return $dbmeta;
104
105			}
106
107			sub connectTarget {
108			my $dbmeta = shift;
109			croak "please supply a dsn or a \"dbmeta\"-hash" if (!$dbmeta);
110			$dbmeta = patch_dbmeta($dbmeta);
111			if (!$dbmeta->{connected}) {
112	cvsjoko	1.2	if ($dbmeta->{dbh} = DBI->connect($dbmeta->{dsn}, '', '', { PrintError => 0 } )) {
113	cvsjoko	1.1	$dbmeta->{dbh}->trace($dbmeta->{trace_level}, $dbmeta->{trace_file});
114			$dbmeta->{dbh}->{PrintError} = 0;
115			$dbmeta->{connected} = 1;
116			$dbmeta_ref_cache = $dbmeta;
117	cvsjoko	1.2	return 1;
118	cvsjoko	1.1	}
119			}
120			}
121
122			sub disconnectTarget {
123			#my $dbmeta = shift;
124			#croak "please supply a \"dbmeta\"-hash" if (!$dbmeta);
125			#$dbmeta = patch_dbmeta($dbmeta);
126			#$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
127			my $dbmeta = $dbmeta_ref_cache;
128			$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
129			undef($dbmeta_ref_cache);
130			}
131
132			sub sendSql {
133			my $sql = shift;
134			my $dbmeta_ref = shift;
135			if (!$dbmeta_ref) {
136			$dbmeta_ref = $dbmeta_ref_cache;
137			}
138			#print "sql: $sql", "\n";
139			if (!$dbmeta_ref->{connected}) {
140			print "not connected!", "\n";
141			return 0;
142			}
143			if (my $result = $dbmeta_ref->{dbh}->prepare($sql)) {
144			if ($result->execute()) {
145			return $result;
146			}
147			}
148			}
149
150			sub dbNow {
151			#my $now_string = strftime "%a %b %e %H:%M:%S %Y", localtime;
152			my $now_string = strftime("%Y-%m-%d %H:%M:%S", localtime);
153			return $now_string;
154			}
155
156
157			sub getDbNameByDsn {
158			my $dsn = shift;
159			$dsn =~ m/database=(.+?);/;
160			my $database_name = $1;
161			return $database_name;
162			}
163
164			sub sqlDbAction {
165			my $dsn = shift;
166			$dsn =~ s/database=.+?;//;
167			my $sql = shift;
168			my $dbmeta = {
169			dsn => $dsn,
170			trace_level => 1,
171			trace_file => 'dbitrace',
172			};
173	cvsjoko	1.2	my $bool_ok;
174			if (connectTarget($dbmeta)) {
175			sendSql($sql);
176	cvsjoko	1.3	#print "state: ", $dbmeta->{dbh}->state, "\n";
177			#print "err ", $dbmeta->{dbh}->err, "\n";
178			#$bool_ok = ($dbmeta->{dbh} && $dbmeta->{dbh}->state && !$dbmeta->{dbh}->err);
179			$bool_ok = ($dbmeta->{dbh} && !$dbmeta->{dbh}->err);
180	cvsjoko	1.2	disconnectTarget($dbmeta);
181			}
182			return $bool_ok;
183	cvsjoko	1.1	}
184
185			sub createSqlDb {
186			my $dsn = shift;
187			my $dbname = getDbNameByDsn($dsn);
188	cvsjoko	1.2	print " - creating rdbms-database $dbname ($dsn) ...";
189	cvsjoko	1.1	my $sql;
190			$sql = "CREATE DATABASE $dbname;";
191	cvsjoko	1.2	if ( sqlDbAction($dsn, $sql) ) {
192	cvsjoko	1.3	print "ok", "\n";
193			return 1;
194	cvsjoko	1.2	} else {
195	cvsjoko	1.3	print "failed", "\n";
196			return 0;
197	cvsjoko	1.2	}
198	cvsjoko	1.1	}
199	cvsjoko	1.2
200	cvsjoko	1.1	sub dropSqlDb {
201			my $dsn = shift;
202			my $dbname = getDbNameByDsn($dsn);
203			print " - dropping database $dbname", "\n";
204			my $sql;
205			$sql = "DROP DATABASE $dbname;";
206			sqlDbAction($dsn, $sql);
207			}
208
209			sub quotesql {
210			my $string = shift;
211			$string =~ s/'/\\'/g;
212			return $string;
213			}
214
215			sub testDsnForTables {
216			my $dsn = shift;
217			connectTarget($dsn);
218			my $result = sendSql('SHOW TABLES;');
219			my $bool_tablesHere = $result->fetchrow_hashref();
220			$result->finish();
221			disconnectTarget($dsn);
222			return 1 if ($bool_tablesHere);
223			}
224
225	cvsjoko	1.3	1;
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