1 package GOSA::DBsqlite;
4 use strict;
5 use warnings;
6 use DBI;
7 use Data::Dumper;
8 use GOSA::GosaSupportDaemon;
9 use Time::HiRes qw(usleep);
12 my $col_names = {};
14 sub new {
15 my $class = shift;
16 my $db_name = shift;
18 my $lock = $db_name.".si.lock";
19 # delete existing lock - instance should be running only once
20 if(stat($lock)) {
21 &main::daemon_log("DEBUG: Removed existing lock $lock.", 7);
22 unlink($lock);
23 }
24 my $self = {dbh=>undef,db_name=>undef,db_lock=>undef,db_lock_handle=>undef};
25 my $dbh = DBI->connect("dbi:SQLite:dbname=$db_name", "", "", {RaiseError => 1, AutoCommit => 1});
26 $self->{dbh} = $dbh;
27 $self->{db_name} = $db_name;
28 $self->{db_lock} = $lock;
29 bless($self,$class);
31 return($self);
32 }
35 sub create_table {
36 my $self = shift;
37 my $table_name = shift;
38 my $col_names_ref = shift;
39 my $col_names_string = join(", ", @{$col_names_ref});
40 my $sql_statement = "CREATE TABLE IF NOT EXISTS $table_name ($col_names_string )";
42 $self->{dbh}->do($sql_statement);
43 return 0;
44 }
47 sub add_dbentry {
48 my $self = shift;
49 my $arg = shift;
50 my $res = 0; # default value
52 # if dbh not specified, return errorflag 1
53 my $table = $arg->{table};
54 if( not defined $table ) {
55 return 1 ;
56 }
58 # if timestamp is not provided, add timestamp
59 if( not exists $arg->{timestamp} ) {
60 $arg->{timestamp} = &get_time;
61 }
63 # check primkey and run insert or update
64 my $primkeys = $arg->{'primkey'};
65 my $prim_statement="";
66 if( 0 != @$primkeys ) { # more than one primkey exist in list
67 my @prim_list;
68 foreach my $primkey (@$primkeys) {
69 if( not exists $arg->{$primkey} ) {
70 return (3, "primkey '$primkey' has no value for add_dbentry");
71 }
72 push(@prim_list, "$primkey='".$arg->{$primkey}."'");
73 }
74 $prim_statement = "WHERE ".join(" AND ", @prim_list);
76 # check wether primkey is unique in table, otherwise return errorflag
77 my $sql_statement = "SELECT * FROM $table $prim_statement";
78 $res = @{ $self->{dbh}->selectall_arrayref($sql_statement) };
80 }
82 # primekey is unique or no primkey specified -> run insert
83 if ($res == 0) {
84 # fetch column names of table
85 my $col_names = &get_table_columns($self, $table);
87 # assign values to column name variables
88 my @col_list;
89 my @val_list;
90 foreach my $col_name (@{$col_names}) {
91 # use function parameter for column values
92 if (exists $arg->{$col_name}) {
93 push(@col_list, "'".$col_name."'");
94 push(@val_list, "'".$arg->{$col_name}."'");
95 }
96 }
98 my $sql_statement = "INSERT INTO $table (".join(", ", @col_list).") VALUES (".join(", ", @val_list).")";
99 my $db_res = $self->{dbh}->do($sql_statement);
100 if( $db_res != 1 ) {
101 return (4, $sql_statement);
102 }
104 # entry already exists -> run update
105 } else {
106 my @update_l;
107 while( my ($pram, $val) = each %{$arg} ) {
108 if( $pram eq 'table' ) { next; }
109 if( $pram eq 'primkey' ) { next; }
110 push(@update_l, "$pram='$val'");
111 }
112 my $update_str= join(", ", @update_l);
113 $update_str= " SET $update_str";
115 my $sql_statement= "UPDATE $table $update_str $prim_statement";
116 my $db_res = &update_dbentry($self, $sql_statement );
117 }
119 return 0;
120 }
122 sub update_dbentry {
123 my ($self, $sql)= @_;
124 my $db_answer= &exec_statement($self, $sql);
125 return $db_answer;
126 }
129 sub del_dbentry {
130 my ($self, $sql)= @_;;
131 my $db_res= &exec_statement($self, $sql);
132 return $db_res;
133 }
136 sub get_table_columns {
137 my $self = shift;
138 my $table = shift;
139 my @column_names;
141 if(exists $col_names->{$table}) {
142 @column_names = @{$col_names->{$table}};
143 } else {
144 my @res = @{$self->{dbh}->selectall_arrayref("pragma table_info('$table')")};
146 foreach my $column (@res) {
147 push(@column_names, @$column[1]);
148 }
149 }
150 return \@column_names;
152 }
155 sub select_dbentry {
156 my ($self, $sql)= @_;
157 my $error= 0;
158 my $answer= {};
159 my $db_answer= &exec_statement($self, $sql);
160 my @column_list;
162 # fetch column list of db and create a hash with column_name->column_value of the select query
163 $sql =~ /SELECT ([\S\s]*?) FROM ([\S]*?)( |$)/g;
164 my $selected_cols = $1;
165 my $table = $2;
167 # all columns are used for creating answer
168 if ($selected_cols eq '*') {
169 @column_list = @{ &get_table_columns($self, $table) };
171 # specific columns are used for creating answer
172 } else {
173 # remove all blanks and split string to list of column names
174 $selected_cols =~ s/ //g;
175 @column_list = split(/,/, $selected_cols);
176 }
178 # create answer
179 my $hit_counter = 0;
180 my $list_len = @column_list;
181 foreach my $hit ( @{$db_answer} ){
182 $hit_counter++;
183 for ( my $i = 0; $i < $list_len; $i++) {
184 $answer->{ $hit_counter }->{ $column_list[$i] } = @{ $hit }[$i];
185 }
186 }
188 return $answer;
189 }
192 sub show_table {
193 my $self = shift;
194 my $table_name = shift;
196 my $sql_statement= "SELECT * FROM $table_name ORDER BY timestamp";
197 my $res= &exec_statement($self, $sql_statement);
198 my @answer;
199 foreach my $hit (@{$res}) {
200 push(@answer, "hit: ".join(', ', @{$hit}));
201 }
202 return join("\n", @answer);
203 }
206 sub exec_statement {
207 my $self = shift;
208 my $sql_statement = shift;
210 $self->{dbh}->do("ANALYZE");
211 my @db_answer = @{$self->{dbh}->selectall_arrayref($sql_statement)};
213 return \@db_answer;
214 }
217 sub exec_statementlist {
218 my $self = shift;
219 my $sql_list = shift;
220 my @db_answer;
222 foreach my $sql (@$sql_list) {
223 @db_answer = @{$self->{dbh}->selectall_arrayref($sql)};
224 }
226 return \@db_answer;
227 }
229 sub count_dbentries {
230 my ($self, $table)= @_;
231 my $error= 0;
232 my $answer= -1;
234 my $sql_statement= "SELECT * FROM $table";
235 my $db_answer= &select_dbentry($self, $sql_statement);
237 my $count = keys(%{$db_answer});
238 return $count;
239 }
243 sub move_table {
244 my ($self, $from, $to) = @_;
246 my $sql_statement_drop = "DROP TABLE IF EXISTS $to";
247 my $sql_statement_alter = "ALTER TABLE $from RENAME TO $to";
248 $self->{dbh}->do($sql_statement_drop);
249 $self->{dbh}->do($sql_statement_alter);
251 return;
252 }
255 1;