perl/libs/libdb.pm

##    --------------------------------------------------------------------------------
##    $Id: libdb.pm,v 1.6 2002/11/29 04:53:39 joko Exp $
##    --------------------------------------------------------------------------------
##    $Log: libdb.pm,v $
##    Revision 1.6  2002/11/29 04:53:39  joko
##    + hash2Sql now knows about SQL_SELECT
##
##    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->{dbh});
  #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	1.7	## $Id: libdb.pm,v 1.6 2002/11/29 04:53:39 joko Exp $
3	cvsjoko	1.1	## --------------------------------------------------------------------------------
4	cvsjoko	1.2	## $Log: libdb.pm,v $
5	joko	1.7	## Revision 1.6 2002/11/29 04:53:39 joko
6			## + hash2Sql now knows about SQL_SELECT
7			##
8	joko	1.6	## Revision 1.5 2002/11/17 07:18:38 joko
9			## + small modification in hash2sql
10			##
11	joko	1.5	## Revision 1.4 2002/10/16 22:36:42 joko
12			## + sub testDbServer
13			##
14	joko	1.4	## Revision 1.3 2002/07/27 00:28:20 cvsjoko
15			## bugfixes
16			##
17	cvsjoko	1.3	## Revision 1.2 2002/07/20 11:09:58 cvsjoko
18			## + bugfixes
19			## + dont' print sql-errors
20			##
21	cvsjoko	1.2	## Revision 1.1 2002/07/19 18:14:03 cvsjoko
22			## no message
23			##
24	cvsjoko	1.1	##
25			## --------------------------------------------------------------------------------
26
27			package libdb;
28
29			use strict;
30			use warnings;
31
32			require Exporter;
33			our @ISA = qw( Exporter );
34	joko	1.6	our @EXPORT_OK = qw(
35	cvsjoko	1.1	testDsn hash2Sql
36			SQL_INSERT SQL_UPDATE
37			connectTarget disconnectTarget sendSql
38			dbNow
39			getDbNameByDsn sqlDbAction createSqlDb dropSqlDb
40			quotesql
41	joko	1.4	testDsnForTables testDbServer
42	cvsjoko	1.1	);
43
44	joko	1.6
45			use libp qw( croak );
46			use DBI;
47
48	cvsjoko	1.1	use constant SQL_INSERT => 10;
49			use constant SQL_UPDATE => 11;
50	joko	1.6	use constant SQL_SELECT => 12;
51	cvsjoko	1.1
52			my $dbmeta_ref_cache;
53
54			sub testDsn {
55			my $dsn = shift;
56			my $result;
57			if ( my $dbh = DBI->connect($dsn, '', '', {
58			PrintError => 0,
59			} ) ) {
60			$dbh->disconnect();
61			return 1;
62			}
63			}
64
65	joko	1.4	sub testDbServer {
66			my $dsn = shift;
67			$dsn =~ s/database=(\w+)//;
68
69			#print "testDbServer: $dsn", "\n";
70
71			my $result;
72			if ( my $dbh = DBI->connect($dsn, '', '', {
73			PrintError => 0,
74			} ) ) {
75			$dbh->disconnect();
76			return 1;
77			}
78			}
79
80	joko	1.6
81			# TODO: handle usage of "$crit" in an abstract way somehow
82	cvsjoko	1.1	sub hash2Sql {
83
84			my $table = shift;
85			my $hash = shift;
86			my $mode = shift;
87			my $crit = shift;
88
89			my $sql;
90	joko	1.6	$mode = SQL_SELECT if ($mode eq 'SQL_SELECT' \|\| $mode eq 'SELECT');
91			$mode = SQL_INSERT if ($mode eq 'SQL_INSERT' \|\| $mode eq 'INSERT');
92			$mode = SQL_UPDATE if ($mode eq 'SQL_UPDATE' \|\| $mode eq 'UPDATE');
93
94			if ($mode == SQL_SELECT) {
95			$sql = "SELECT #fields# FROM $table WHERE $crit";
96			} elsif ($mode == SQL_INSERT) {
97			$sql = "INSERT INTO $table (#fields#) VALUES (#values#)";
98			} elsif ($mode == SQL_UPDATE) {
99			$sql = "UPDATE $table SET #fields-values# WHERE $crit";
100	cvsjoko	1.1	}
101
102			my (@fields, @values);
103			foreach my $key (keys %{$hash}) {
104			push @fields, $key;
105			push @values, $hash->{$key};
106			}
107			# quote each element
108			map { if (defined $_) { $_ = "'$_'" } else { $_ = "null" } } @values;
109
110			my $fields = join(', ', @fields);
111			my $values = join(', ', @values);
112			my $fields_values = '';
113			my $fc = 0;
114			foreach (@fields) {
115			$fields_values .= $_ . '=' . $values[$fc] . ', ';
116			$fc++;
117			}
118			$fields_values = substr($fields_values, 0, -2);
119
120			$sql =~ s/#fields#/$fields/;
121			$sql =~ s/#values#/$values/;
122			$sql =~ s/#fields-values#/$fields_values/;
123
124			return $sql;
125			}
126
127			sub patch_dbmeta {
128
129			my $dbmeta = shift;
130
131			if ($dbmeta =~ m/^dbi:/) {
132			$dbmeta = {
133			dsn => $dbmeta,
134			trace_level => 0,
135			trace_file => undef,
136			};
137			}
138
139			return $dbmeta;
140
141			}
142
143			sub connectTarget {
144			my $dbmeta = shift;
145			croak "please supply a dsn or a \"dbmeta\"-hash" if (!$dbmeta);
146			$dbmeta = patch_dbmeta($dbmeta);
147			if (!$dbmeta->{connected}) {
148	cvsjoko	1.2	if ($dbmeta->{dbh} = DBI->connect($dbmeta->{dsn}, '', '', { PrintError => 0 } )) {
149	cvsjoko	1.1	$dbmeta->{dbh}->trace($dbmeta->{trace_level}, $dbmeta->{trace_file});
150			$dbmeta->{dbh}->{PrintError} = 0;
151			$dbmeta->{connected} = 1;
152			$dbmeta_ref_cache = $dbmeta;
153	cvsjoko	1.2	return 1;
154	cvsjoko	1.1	}
155			}
156			}
157
158			sub disconnectTarget {
159			#my $dbmeta = shift;
160			#croak "please supply a \"dbmeta\"-hash" if (!$dbmeta);
161			#$dbmeta = patch_dbmeta($dbmeta);
162			#$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
163			my $dbmeta = $dbmeta_ref_cache;
164			$dbmeta->{dbh} && $dbmeta->{dbh}->disconnect();
165	joko	1.7	undef($dbmeta->{dbh});
166			#undef($dbmeta_ref_cache);
167	cvsjoko	1.1	}
168
169			sub sendSql {
170			my $sql = shift;
171			my $dbmeta_ref = shift;
172			if (!$dbmeta_ref) {
173			$dbmeta_ref = $dbmeta_ref_cache;
174			}
175			#print "sql: $sql", "\n";
176			if (!$dbmeta_ref->{connected}) {
177			print "not connected!", "\n";
178			return 0;
179			}
180			if (my $result = $dbmeta_ref->{dbh}->prepare($sql)) {
181	joko	1.4	#if ($result->execute()) {
182			$result->execute();
183	cvsjoko	1.1	return $result;
184	joko	1.4	#}
185	cvsjoko	1.1	}
186			}
187
188			sub dbNow {
189			#my $now_string = strftime "%a %b %e %H:%M:%S %Y", localtime;
190			my $now_string = strftime("%Y-%m-%d %H:%M:%S", localtime);
191			return $now_string;
192			}
193
194
195			sub getDbNameByDsn {
196			my $dsn = shift;
197			$dsn =~ m/database=(.+?);/;
198			my $database_name = $1;
199			return $database_name;
200			}
201
202			sub sqlDbAction {
203			my $dsn = shift;
204			$dsn =~ s/database=.+?;//;
205			my $sql = shift;
206			my $dbmeta = {
207			dsn => $dsn,
208			trace_level => 1,
209			trace_file => 'dbitrace',
210			};
211	cvsjoko	1.2	my $bool_ok;
212			if (connectTarget($dbmeta)) {
213			sendSql($sql);
214	cvsjoko	1.3	#print "state: ", $dbmeta->{dbh}->state, "\n";
215			#print "err ", $dbmeta->{dbh}->err, "\n";
216			#$bool_ok = ($dbmeta->{dbh} && $dbmeta->{dbh}->state && !$dbmeta->{dbh}->err);
217			$bool_ok = ($dbmeta->{dbh} && !$dbmeta->{dbh}->err);
218	cvsjoko	1.2	disconnectTarget($dbmeta);
219			}
220			return $bool_ok;
221	cvsjoko	1.1	}
222
223			sub createSqlDb {
224			my $dsn = shift;
225			my $dbname = getDbNameByDsn($dsn);
226	cvsjoko	1.2	print " - creating rdbms-database $dbname ($dsn) ...";
227	cvsjoko	1.1	my $sql;
228			$sql = "CREATE DATABASE $dbname;";
229	cvsjoko	1.2	if ( sqlDbAction($dsn, $sql) ) {
230	cvsjoko	1.3	print "ok", "\n";
231			return 1;
232	cvsjoko	1.2	} else {
233	cvsjoko	1.3	print "failed", "\n";
234			return 0;
235	cvsjoko	1.2	}
236	cvsjoko	1.1	}
237	cvsjoko	1.2
238	cvsjoko	1.1	sub dropSqlDb {
239			my $dsn = shift;
240			my $dbname = getDbNameByDsn($dsn);
241			print " - dropping database $dbname", "\n";
242			my $sql;
243			$sql = "DROP DATABASE $dbname;";
244			sqlDbAction($dsn, $sql);
245			}
246
247			sub quotesql {
248			my $string = shift;
249	joko	1.4	if ($string) {
250			$string =~ s/'/\\'/g;
251			}
252	cvsjoko	1.1	return $string;
253			}
254
255			sub testDsnForTables {
256			my $dsn = shift;
257			connectTarget($dsn);
258			my $result = sendSql('SHOW TABLES;');
259			my $bool_tablesHere = $result->fetchrow_hashref();
260			$result->finish();
261			disconnectTarget($dsn);
262			return 1 if ($bool_tablesHere);
263			}
264
265	cvsjoko	1.3	1;
MailToCvsAdmin">MailToCvsAdmin	ViewVC Help
Powered by ViewVC 1.1.26