perl/libs/libdb.pm

##    --------------------------------------------------------------------------------
##    $Id: libdb.pm,v 1.5 2002/11/17 07:18:38 joko Exp $
##    --------------------------------------------------------------------------------
##    $Log: libdb.pm,v $
##    Revision 1.5  2002/11/17 07:18:38  joko
##    + small modification in hash2sql
##
##    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;

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


use libp qw( croak );
use DBI;

use constant SQL_INSERT => 10;
use constant SQL_UPDATE => 11;
use constant SQL_SELECT => 12;

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;
  }
}


# TODO: handle usage of "$crit" in an abstract way somehow
sub hash2Sql {
  
  my $table = shift;
  my $hash = shift;
  my $mode = shift;
  my $crit = shift;
  
  my $sql;
  $mode = SQL_SELECT if ($mode eq 'SQL_SELECT' || $mode eq 'SELECT');
  $mode = SQL_INSERT if ($mode eq 'SQL_INSERT' || $mode eq 'INSERT');
  $mode = SQL_UPDATE if ($mode eq 'SQL_UPDATE' || $mode eq 'UPDATE');

  if ($mode == SQL_SELECT) {
    $sql = "SELECT #fields# FROM $table WHERE $crit";
  } elsif ($mode == SQL_INSERT) {
    $sql = "INSERT INTO $table (#fields#) VALUES (#values#)";
  } elsif ($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	1.6	## $Id: libdb.pm,v 1.5 2002/11/17 07:18:38 joko Exp $
3	cvsjoko	1.1	## --------------------------------------------------------------------------------
4	cvsjoko	1.2	## $Log: libdb.pm,v $
5	joko	1.6	## Revision 1.5 2002/11/17 07:18:38 joko
6			## + small modification in hash2sql
7			##
8	joko	1.5	## Revision 1.4 2002/10/16 22:36:42 joko
9			## + sub testDbServer
10			##
11	joko	1.4	## Revision 1.3 2002/07/27 00:28:20 cvsjoko
12			## bugfixes
13			##
14	cvsjoko	1.3	## Revision 1.2 2002/07/20 11:09:58 cvsjoko
15			## + bugfixes
16			## + dont' print sql-errors
17			##
18	cvsjoko	1.2	## Revision 1.1 2002/07/19 18:14:03 cvsjoko
19			## no message
20			##
21	cvsjoko	1.1	##
22			## --------------------------------------------------------------------------------
23
24			package libdb;
25
26			use strict;
27			use warnings;
28
29			require Exporter;
30			our @ISA = qw( Exporter );
31	joko	1.6	our @EXPORT_OK = qw(
32	cvsjoko	1.1	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	joko	1.6
42			use libp qw( croak );
43			use DBI;
44
45	cvsjoko	1.1	use constant SQL_INSERT => 10;
46			use constant SQL_UPDATE => 11;
47	joko	1.6	use constant SQL_SELECT => 12;
48	cvsjoko	1.1
49			my $dbmeta_ref_cache;
50
51			sub testDsn {
52			my $dsn = shift;
53			my $result;
54			if ( my $dbh = DBI->connect($dsn, '', '', {
55			PrintError => 0,
56			} ) ) {
57			$dbh->disconnect();
58			return 1;
59			}
60			}
61
62	joko	1.4	sub testDbServer {
63			my $dsn = shift;
64			$dsn =~ s/database=(\w+)//;
65
66			#print "testDbServer: $dsn", "\n";
67
68			my $result;
69			if ( my $dbh = DBI->connect($dsn, '', '', {
70			PrintError => 0,
71			} ) ) {
72			$dbh->disconnect();
73			return 1;
74			}
75			}
76
77	joko	1.6
78			# TODO: handle usage of "$crit" in an abstract way somehow
79	cvsjoko	1.1	sub hash2Sql {
80
81			my $table = shift;
82			my $hash = shift;
83			my $mode = shift;
84			my $crit = shift;
85
86			my $sql;
87	joko	1.6	$mode = SQL_SELECT if ($mode eq 'SQL_SELECT' \|\| $mode eq 'SELECT');
88			$mode = SQL_INSERT if ($mode eq 'SQL_INSERT' \|\| $mode eq 'INSERT');
89			$mode = SQL_UPDATE if ($mode eq 'SQL_UPDATE' \|\| $mode eq 'UPDATE');
90
91			if ($mode == SQL_SELECT) {
92			$sql = "SELECT #fields# FROM $table WHERE $crit";
93			} elsif ($mode == SQL_INSERT) {
94			$sql = "INSERT INTO $table (#fields#) VALUES (#values#)";
95			} elsif ($mode == SQL_UPDATE) {
96			$sql = "UPDATE $table SET #fields-values# WHERE $crit";
97	cvsjoko	1.1	}
98
99			my (@fields, @values);
100			foreach my $key (keys %{$hash}) {
101			push @fields, $key;
102			push @values, $hash->{$key};
103			}
104			# quote each element
105			map { if (defined $_) { $_ = "'$_'" } else { $_ = "null" } } @values;
106
107			my $fields = join(', ', @fields);
108			my $values = join(', ', @values);
109			my $fields_values = '';
110			my $fc = 0;
111			foreach (@fields) {
112			$fields_values .= $_ . '=' . $values[$fc] . ', ';
113			$fc++;
114			}
115			$fields_values = substr($fields_values, 0, -2);
116
117			$sql =~ s/#fields#/$fields/;
118			$sql =~ s/#values#/$values/;
119			$sql =~ s/#fields-values#/$fields_values/;
120
121			return $sql;
122			}
123
124			sub patch_dbmeta {
125
126			my $dbmeta = shift;
127
128			if ($dbmeta =~ m/^dbi:/) {
129			$dbmeta = {
130			dsn => $dbmeta,
131			trace_level => 0,
132			trace_file => undef,
133			};
134			}
135
136			return $dbmeta;
137
138			}
139
140			sub connectTarget {
141			my $dbmeta = shift;
142			croak "please supply a dsn or a \"dbmeta\"-hash" if (!$dbmeta);
143			$dbmeta = patch_dbmeta($dbmeta);
144			if (!$dbmeta->{connected}) {
145	cvsjoko	1.2	if ($dbmeta->{dbh} = DBI->connect($dbmeta->{dsn}, '', '', { PrintError => 0 } )) {
146	cvsjoko	1.1	$dbmeta->{dbh}->trace($dbmeta->{trace_level}, $dbmeta->{trace_file});
147			$dbmeta->{dbh}->{PrintError} = 0;
148			$dbmeta->{connected} = 1;
149			$dbmeta_ref_cache = $dbmeta;
150	cvsjoko	1.2	return 1;
151	cvsjoko	1.1	}
152			}
153			}
154
155			sub disconnectTarget {
156			#my $dbmeta = shift;
157			#croak "please supply a \"dbmeta\"-hash" if (!$dbmeta);
158			#$dbmeta = patch_dbmeta($dbmeta);
159			#$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
160			my $dbmeta = $dbmeta_ref_cache;
161			$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
162			undef($dbmeta_ref_cache);
163			}
164
165			sub sendSql {
166			my $sql = shift;
167			my $dbmeta_ref = shift;
168			if (!$dbmeta_ref) {
169			$dbmeta_ref = $dbmeta_ref_cache;
170			}
171			#print "sql: $sql", "\n";
172			if (!$dbmeta_ref->{connected}) {
173			print "not connected!", "\n";
174			return 0;
175			}
176			if (my $result = $dbmeta_ref->{dbh}->prepare($sql)) {
177	joko	1.4	#if ($result->execute()) {
178			$result->execute();
179	cvsjoko	1.1	return $result;
180	joko	1.4	#}
181	cvsjoko	1.1	}
182			}
183
184			sub dbNow {
185			#my $now_string = strftime "%a %b %e %H:%M:%S %Y", localtime;
186			my $now_string = strftime("%Y-%m-%d %H:%M:%S", localtime);
187			return $now_string;
188			}
189
190
191			sub getDbNameByDsn {
192			my $dsn = shift;
193			$dsn =~ m/database=(.+?);/;
194			my $database_name = $1;
195			return $database_name;
196			}
197
198			sub sqlDbAction {
199			my $dsn = shift;
200			$dsn =~ s/database=.+?;//;
201			my $sql = shift;
202			my $dbmeta = {
203			dsn => $dsn,
204			trace_level => 1,
205			trace_file => 'dbitrace',
206			};
207	cvsjoko	1.2	my $bool_ok;
208			if (connectTarget($dbmeta)) {
209			sendSql($sql);
210	cvsjoko	1.3	#print "state: ", $dbmeta->{dbh}->state, "\n";
211			#print "err ", $dbmeta->{dbh}->err, "\n";
212			#$bool_ok = ($dbmeta->{dbh} && $dbmeta->{dbh}->state && !$dbmeta->{dbh}->err);
213			$bool_ok = ($dbmeta->{dbh} && !$dbmeta->{dbh}->err);
214	cvsjoko	1.2	disconnectTarget($dbmeta);
215			}
216			return $bool_ok;
217	cvsjoko	1.1	}
218
219			sub createSqlDb {
220			my $dsn = shift;
221			my $dbname = getDbNameByDsn($dsn);
222	cvsjoko	1.2	print " - creating rdbms-database $dbname ($dsn) ...";
223	cvsjoko	1.1	my $sql;
224			$sql = "CREATE DATABASE $dbname;";
225	cvsjoko	1.2	if ( sqlDbAction($dsn, $sql) ) {
226	cvsjoko	1.3	print "ok", "\n";
227			return 1;
228	cvsjoko	1.2	} else {
229	cvsjoko	1.3	print "failed", "\n";
230			return 0;
231	cvsjoko	1.2	}
232	cvsjoko	1.1	}
233	cvsjoko	1.2
234	cvsjoko	1.1	sub dropSqlDb {
235			my $dsn = shift;
236			my $dbname = getDbNameByDsn($dsn);
237			print " - dropping database $dbname", "\n";
238			my $sql;
239			$sql = "DROP DATABASE $dbname;";
240			sqlDbAction($dsn, $sql);
241			}
242
243			sub quotesql {
244			my $string = shift;
245	joko	1.4	if ($string) {
246			$string =~ s/'/\\'/g;
247			}
248	cvsjoko	1.1	return $string;
249			}
250
251			sub testDsnForTables {
252			my $dsn = shift;
253			connectTarget($dsn);
254			my $result = sendSql('SHOW TABLES;');
255			my $bool_tablesHere = $result->fetchrow_hashref();
256			$result->finish();
257			disconnectTarget($dsn);
258			return 1 if ($bool_tablesHere);
259			}
260
261	cvsjoko	1.3	1;
MailToCvsAdmin">MailToCvsAdmin	ViewVC Help
Powered by ViewVC 1.1.26