perl/libs/libdb.pm

##    --------------------------------------------------------------------------------
##    $Id: libdb.pm,v 1.4 2002/10/16 22:36:42 joko Exp $
##    --------------------------------------------------------------------------------
##    $Log: libdb.pm,v $
##    Revision 1.4  2002/10/16 22:36:42  joko
##    + sub testDbServer
##
##    Revision 1.3  2002/07/27 00:28:20  cvsjoko
##    bugfixes
##
##    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 testDbServer
                              );

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 testDbServer {
  my $dsn = shift;
  $dsn =~ s/database=(\w+)//;
  
  #print "testDbServer: $dsn", "\n";
  
  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 eq 'SQL_INSERT' || $mode == SQL_INSERT) {
    $sql = "INSERT INTO $table (#fields#) VALUES (#values#);";
  }
  if ($mode eq 'SQL_UPDATE' || $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()) {
      $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 $string = shift;
  if ($string) {
    $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	joko	1.5	## $Id: libdb.pm,v 1.4 2002/10/16 22:36:42 joko Exp $
3	cvsjoko	1.1	## --------------------------------------------------------------------------------
4	cvsjoko	1.2	## $Log: libdb.pm,v $
5	joko	1.5	## Revision 1.4 2002/10/16 22:36:42 joko
6			## + sub testDbServer
7			##
8	joko	1.4	## Revision 1.3 2002/07/27 00:28:20 cvsjoko
9			## bugfixes
10			##
11	cvsjoko	1.3	## Revision 1.2 2002/07/20 11:09:58 cvsjoko
12			## + bugfixes
13			## + dont' print sql-errors
14			##
15	cvsjoko	1.2	## Revision 1.1 2002/07/19 18:14:03 cvsjoko
16			## no message
17			##
18	cvsjoko	1.1	##
19			## --------------------------------------------------------------------------------
20
21			package libdb;
22
23			use strict;
24			use warnings;
25
26			use libp;
27			use DBI;
28
29			require Exporter;
30			our @ISA = qw( Exporter );
31			our @EXPORT = qw(
32			testDsn hash2Sql
33			SQL_INSERT SQL_UPDATE
34			connectTarget disconnectTarget sendSql
35			dbNow
36			getDbNameByDsn sqlDbAction createSqlDb dropSqlDb
37			quotesql
38	joko	1.4	testDsnForTables testDbServer
39	cvsjoko	1.1	);
40
41			use constant SQL_INSERT => 10;
42			use constant SQL_UPDATE => 11;
43
44			my $dbmeta_ref_cache;
45
46			sub testDsn {
47			my $dsn = shift;
48			my $result;
49			if ( my $dbh = DBI->connect($dsn, '', '', {
50			PrintError => 0,
51			} ) ) {
52			$dbh->disconnect();
53			return 1;
54			}
55			}
56
57	joko	1.4	sub testDbServer {
58			my $dsn = shift;
59			$dsn =~ s/database=(\w+)//;
60
61			#print "testDbServer: $dsn", "\n";
62
63			my $result;
64			if ( my $dbh = DBI->connect($dsn, '', '', {
65			PrintError => 0,
66			} ) ) {
67			$dbh->disconnect();
68			return 1;
69			}
70			}
71
72	cvsjoko	1.1	sub hash2Sql {
73
74			my $table = shift;
75			my $hash = shift;
76			my $mode = shift;
77			my $crit = shift;
78
79			my $sql;
80	joko	1.5	if ($mode eq 'SQL_INSERT' \|\| $mode == SQL_INSERT) {
81	cvsjoko	1.1	$sql = "INSERT INTO $table (#fields#) VALUES (#values#);";
82			}
83	joko	1.5	if ($mode eq 'SQL_UPDATE' \|\| $mode == SQL_UPDATE) {
84	cvsjoko	1.1	$sql = "UPDATE $table SET #fields-values# WHERE $crit;";
85			}
86
87			my (@fields, @values);
88			foreach my $key (keys %{$hash}) {
89			push @fields, $key;
90			push @values, $hash->{$key};
91			}
92			# quote each element
93			map { if (defined $_) { $_ = "'$_'" } else { $_ = "null" } } @values;
94
95			my $fields = join(', ', @fields);
96			my $values = join(', ', @values);
97			my $fields_values = '';
98			my $fc = 0;
99			foreach (@fields) {
100			$fields_values .= $_ . '=' . $values[$fc] . ', ';
101			$fc++;
102			}
103			$fields_values = substr($fields_values, 0, -2);
104
105			$sql =~ s/#fields#/$fields/;
106			$sql =~ s/#values#/$values/;
107			$sql =~ s/#fields-values#/$fields_values/;
108
109			return $sql;
110			}
111
112			sub patch_dbmeta {
113
114			my $dbmeta = shift;
115
116			if ($dbmeta =~ m/^dbi:/) {
117			$dbmeta = {
118			dsn => $dbmeta,
119			trace_level => 0,
120			trace_file => undef,
121			};
122			}
123
124			return $dbmeta;
125
126			}
127
128			sub connectTarget {
129			my $dbmeta = shift;
130			croak "please supply a dsn or a \"dbmeta\"-hash" if (!$dbmeta);
131			$dbmeta = patch_dbmeta($dbmeta);
132			if (!$dbmeta->{connected}) {
133	cvsjoko	1.2	if ($dbmeta->{dbh} = DBI->connect($dbmeta->{dsn}, '', '', { PrintError => 0 } )) {
134	cvsjoko	1.1	$dbmeta->{dbh}->trace($dbmeta->{trace_level}, $dbmeta->{trace_file});
135			$dbmeta->{dbh}->{PrintError} = 0;
136			$dbmeta->{connected} = 1;
137			$dbmeta_ref_cache = $dbmeta;
138	cvsjoko	1.2	return 1;
139	cvsjoko	1.1	}
140			}
141			}
142
143			sub disconnectTarget {
144			#my $dbmeta = shift;
145			#croak "please supply a \"dbmeta\"-hash" if (!$dbmeta);
146			#$dbmeta = patch_dbmeta($dbmeta);
147			#$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
148			my $dbmeta = $dbmeta_ref_cache;
149			$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
150			undef($dbmeta_ref_cache);
151			}
152
153			sub sendSql {
154			my $sql = shift;
155			my $dbmeta_ref = shift;
156			if (!$dbmeta_ref) {
157			$dbmeta_ref = $dbmeta_ref_cache;
158			}
159			#print "sql: $sql", "\n";
160			if (!$dbmeta_ref->{connected}) {
161			print "not connected!", "\n";
162			return 0;
163			}
164			if (my $result = $dbmeta_ref->{dbh}->prepare($sql)) {
165	joko	1.4	#if ($result->execute()) {
166			$result->execute();
167	cvsjoko	1.1	return $result;
168	joko	1.4	#}
169	cvsjoko	1.1	}
170			}
171
172			sub dbNow {
173			#my $now_string = strftime "%a %b %e %H:%M:%S %Y", localtime;
174			my $now_string = strftime("%Y-%m-%d %H:%M:%S", localtime);
175			return $now_string;
176			}
177
178
179			sub getDbNameByDsn {
180			my $dsn = shift;
181			$dsn =~ m/database=(.+?);/;
182			my $database_name = $1;
183			return $database_name;
184			}
185
186			sub sqlDbAction {
187			my $dsn = shift;
188			$dsn =~ s/database=.+?;//;
189			my $sql = shift;
190			my $dbmeta = {
191			dsn => $dsn,
192			trace_level => 1,
193			trace_file => 'dbitrace',
194			};
195	cvsjoko	1.2	my $bool_ok;
196			if (connectTarget($dbmeta)) {
197			sendSql($sql);
198	cvsjoko	1.3	#print "state: ", $dbmeta->{dbh}->state, "\n";
199			#print "err ", $dbmeta->{dbh}->err, "\n";
200			#$bool_ok = ($dbmeta->{dbh} && $dbmeta->{dbh}->state && !$dbmeta->{dbh}->err);
201			$bool_ok = ($dbmeta->{dbh} && !$dbmeta->{dbh}->err);
202	cvsjoko	1.2	disconnectTarget($dbmeta);
203			}
204			return $bool_ok;
205	cvsjoko	1.1	}
206
207			sub createSqlDb {
208			my $dsn = shift;
209			my $dbname = getDbNameByDsn($dsn);
210	cvsjoko	1.2	print " - creating rdbms-database $dbname ($dsn) ...";
211	cvsjoko	1.1	my $sql;
212			$sql = "CREATE DATABASE $dbname;";
213	cvsjoko	1.2	if ( sqlDbAction($dsn, $sql) ) {
214	cvsjoko	1.3	print "ok", "\n";
215			return 1;
216	cvsjoko	1.2	} else {
217	cvsjoko	1.3	print "failed", "\n";
218			return 0;
219	cvsjoko	1.2	}
220	cvsjoko	1.1	}
221	cvsjoko	1.2
222	cvsjoko	1.1	sub dropSqlDb {
223			my $dsn = shift;
224			my $dbname = getDbNameByDsn($dsn);
225			print " - dropping database $dbname", "\n";
226			my $sql;
227			$sql = "DROP DATABASE $dbname;";
228			sqlDbAction($dsn, $sql);
229			}
230
231			sub quotesql {
232			my $string = shift;
233	joko	1.4	if ($string) {
234			$string =~ s/'/\\'/g;
235			}
236	cvsjoko	1.1	return $string;
237			}
238
239			sub testDsnForTables {
240			my $dsn = shift;
241			connectTarget($dsn);
242			my $result = sendSql('SHOW TABLES;');
243			my $bool_tablesHere = $result->fetchrow_hashref();
244			$result->finish();
245			disconnectTarget($dsn);
246			return 1 if ($bool_tablesHere);
247			}
248
249	cvsjoko	1.3	1;
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