C4/Installer.pm

   1 package C4::Installer;
   2
   3 # Copyright (C) 2008 LibLime
   4 #
   5 # This file is part of Koha.
   6 #
   7 # Koha is free software; you can redistribute it and/or modify it
   8 # under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # Koha is distributed in the hope that it will be useful, but
  13 # WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  19
  20 use Modern::Perl;
  21
  22 use Encode qw( encode is_utf8 );
  23 use DBIx::RunSQL;
  24 use YAML::Syck qw( LoadFile );
  25 use C4::Context;
  26 use DBI;
  27 use Koha;
  28
  29 use vars qw(@ISA @EXPORT);
  30 BEGIN {
  31     require Exporter;
  32     @ISA = qw( Exporter );
  33     push @EXPORT, qw( foreign_key_exists index_exists column_exists TableExists);
  34 };
  35
  36 =head1 NAME
  37
  38 C4::Installer
  39
  40 =head1 SYNOPSIS
  41
  42  use C4::Installer;
  43  my $installer = C4::Installer->new();
  44  my $all_languages = getAllLanguages();
  45  my $error = $installer->load_db_schema();
  46  my $list;
  47  #fill $list with list of sql files
  48  my ($fwk_language, $error_list) = $installer->load_sql_in_order($all_languages, @$list);
  49  $installer->set_version_syspref();
  50  $installer->set_marcflavour_syspref('MARC21');
  51
  52 =head1 DESCRIPTION
  53
  54 =cut
  55
  56 =head1 METHODS
  57
  58 =head2 new
  59
  60   my $installer = C4::Installer->new();
  61
  62 Creates a new installer.
  63
  64 =cut
  65
  66 sub new {
  67     my $class = shift;
  68
  69     my $self = {};
  70
  71     # get basic information from context
  72     $self->{'dbname'}   = C4::Context->config("database");
  73     $self->{'dbms'}     = C4::Context->config("db_scheme") ? C4::Context->config("db_scheme") : "mysql";
  74     $self->{'hostname'} = C4::Context->config("hostname");
  75     $self->{'port'}     = C4::Context->config("port");
  76     $self->{'user'}     = C4::Context->config("user");
  77     $self->{'password'} = C4::Context->config("pass");
  78     $self->{'tls'} = C4::Context->config("tls");
  79     if( $self->{'tls'} && $self->{'tls'} eq 'yes' ) {
  80         $self->{'ca'} = C4::Context->config('ca');
  81         $self->{'cert'} = C4::Context->config('cert');
  82         $self->{'key'} = C4::Context->config('key');
  83         $self->{'tlsoptions'} = ";mysql_ssl=1;mysql_ssl_client_key=".$self->{key}.";mysql_ssl_client_cert=".$self->{cert}.";mysql_ssl_ca_file=".$self->{ca};
  84         $self->{'tlscmdline'} =  " --ssl-cert ". $self->{cert} . " --ssl-key " . $self->{key} . " --ssl-ca ".$self->{ca}." "
  85     }
  86     $self->{'dbh'} = DBI->connect("DBI:$self->{dbms}:dbname=$self->{dbname};host=$self->{hostname}" .
  87                                   ( $self->{port} ? ";port=$self->{port}" : "" ).
  88                                   ( $self->{tlsoptions} ? $self->{tlsoptions} : ""),
  89                                   $self->{'user'}, $self->{'password'});
  90     $self->{'language'} = undef;
  91     $self->{'marcflavour'} = undef;
  92         $self->{'dbh'}->do('set NAMES "utf8"');
  93     $self->{'dbh'}->{'mysql_enable_utf8'}=1;
  94
  95     bless $self, $class;
  96     return $self;
  97 }
  98
  99 =head2 marc_framework_sql_list
 100
 101   my ($defaulted_to_en, $list) =
 102      $installer->marc_framework_sql_list($lang, $marcflavour);
 103
 104 Returns in C<$list> a structure listing the filename, description, section,
 105 and mandatory/optional status of MARC framework scripts available for C<$lang>
 106 and C<$marcflavour>.
 107
 108 If the C<$defaulted_to_en> return value is true, no scripts are available
 109 for language C<$lang> and the 'en' ones are returned.
 110
 111 =cut
 112
 113 sub marc_framework_sql_list {
 114     my $self = shift;
 115     my $lang = shift;
 116     my $marcflavour = shift;
 117
 118     my $defaulted_to_en = 0;
 119
 120     undef $/;
 121     my $dir = C4::Context->config('intranetdir') . "/installer/data/$self->{dbms}/$lang/marcflavour/".lc($marcflavour);
 122     unless (opendir( MYDIR, $dir )) {
 123         if ($lang eq 'en') {
 124             warn "cannot open MARC frameworks directory $dir";
 125         } else {
 126             # if no translated MARC framework is available,
 127             # default to English
 128             $dir = C4::Context->config('intranetdir') . "/installer/data/$self->{dbms}/en/marcflavour/".lc($marcflavour);
 129             opendir(MYDIR, $dir) or warn "cannot open English MARC frameworks directory $dir";
 130             $defaulted_to_en = 1;
 131         }
 132     }
 133     my @listdir = sort grep { !/^\.|marcflavour/ && -d "$dir/$_" } readdir(MYDIR);
 134     closedir MYDIR;
 135
 136     my @fwklist;
 137     my $request = $self->{'dbh'}->prepare("SELECT value FROM systempreferences WHERE variable='FrameworksLoaded'");
 138     $request->execute;
 139     my ($frameworksloaded) = $request->fetchrow;
 140     $frameworksloaded = '' unless defined $frameworksloaded; # avoid warning
 141     my %frameworksloaded;
 142     foreach ( split( /\|/, $frameworksloaded ) ) {
 143         $frameworksloaded{$_} = 1;
 144     }
 145
 146     foreach my $requirelevel (@listdir) {
 147         opendir( MYDIR, "$dir/$requirelevel" );
 148         my @listname = grep { !/^\./ && -f "$dir/$requirelevel/$_" && $_ =~ m/\.(sql|yml)$/ } readdir(MYDIR);
 149         closedir MYDIR;
 150         my %cell;
 151         my @frameworklist;
 152         map {
 153             my ( $name, $ext ) = split /\./, $_;
 154             my @lines;
 155             if ( $ext =~ /yml/ ) {
 156                 my $yaml = LoadFile("$dir/$requirelevel/$name\.$ext");
 157                 @lines = map { Encode::decode('UTF-8', $_) } @{ $yaml->{'description'} };
 158             } else {
 159                 open my $fh, "<:encoding(UTF-8)", "$dir/$requirelevel/$name.txt";
 160                 my $line = <$fh>;
 161                 $line = Encode::encode('UTF-8', $line) unless ( Encode::is_utf8($line) );
 162                 @lines = split /\n/, $line;
 163             }
 164             my $mandatory = ($requirelevel =~ /(mandatory|requi|oblig|necess)/i);
 165             push @frameworklist,
 166               {
 167                 'fwkname'        => $name,
 168                 'fwkfile'        => "$dir/$requirelevel/$_",
 169                 'fwkdescription' => \@lines,
 170                 'checked'        => ( ( $frameworksloaded{$_} || $mandatory ) ? 1 : 0 ),
 171                 'mandatory'      => $mandatory,
 172               };
 173         } @listname;
 174         my @fwks =
 175           sort { $a->{'fwkname'} cmp $b->{'fwkname'} } @frameworklist;
 176
 177         $cell{"frameworks"} = \@fwks;
 178         $cell{"label"}      = ($requirelevel =~ /(mandatory|requi|oblig|necess)/i)?'mandatory':'optional';
 179         $cell{"code"}       = lc($requirelevel);
 180         push @fwklist, \%cell;
 181     }
 182
 183     return ($defaulted_to_en, \@fwklist);
 184 }
 185
 186 =head2 sample_data_sql_list
 187
 188   my ($defaulted_to_en, $list) = $installer->sample_data_sql_list($lang);
 189
 190 Returns in C<$list> a structure listing the filename, description, section,
 191 and mandatory/optional status of sample data scripts available for C<$lang>.
 192 If the C<$defaulted_to_en> return value is true, no scripts are available
 193 for language C<$lang> and the 'en' ones are returned.
 194
 195 =cut
 196
 197 sub sample_data_sql_list {
 198     my $self = shift;
 199     my $lang = shift;
 200
 201     my $defaulted_to_en = 0;
 202
 203     undef $/;
 204     my $dir = C4::Context->config('intranetdir') . "/installer/data/$self->{dbms}/$lang";
 205     unless (opendir( MYDIR, $dir )) {
 206         if ($lang eq 'en') {
 207             warn "cannot open sample data directory $dir";
 208         } else {
 209             # if no sample data is available,
 210             # default to English
 211             $dir = C4::Context->config('intranetdir') . "/installer/data/$self->{dbms}/en";
 212             opendir(MYDIR, $dir) or warn "cannot open English sample data directory $dir";
 213             $defaulted_to_en = 1;
 214         }
 215     }
 216     my @listdir = sort grep { !/^\.|marcflavour/ && -d "$dir/$_" } readdir(MYDIR);
 217     closedir MYDIR;
 218
 219     my @levellist;
 220     my $request = $self->{'dbh'}->prepare("SELECT value FROM systempreferences WHERE variable='FrameworksLoaded'");
 221     $request->execute;
 222     my ($frameworksloaded) = $request->fetchrow;
 223     $frameworksloaded = '' unless defined $frameworksloaded; # avoid warning
 224     my %frameworksloaded;
 225     foreach ( split( /\|/, $frameworksloaded ) ) {
 226         $frameworksloaded{$_} = 1;
 227     }
 228
 229     foreach my $requirelevel (@listdir) {
 230         opendir( MYDIR, "$dir/$requirelevel" );
 231         my @listname = grep { !/^\./ && -f "$dir/$requirelevel/$_" && $_ =~ m/\.(sql|yml)$/ } readdir(MYDIR);
 232         closedir MYDIR;
 233         my %cell;
 234         my @frameworklist;
 235         map {
 236             my ( $name, $ext ) = split /\./, $_;
 237             my @lines;
 238             if ( $ext =~ /yml/ ) {
 239                 my $yaml = LoadFile("$dir/$requirelevel/$name\.$ext");
 240                 @lines = map { Encode::decode('UTF-8', $_) } @{ $yaml->{'description'} };
 241             } else {
 242                 open my $fh, "<:encoding(UTF-8)", "$dir/$requirelevel/$name.txt";
 243                 my $line = <$fh>;
 244                 $line = Encode::encode('UTF-8', $line) unless ( Encode::is_utf8($line) );
 245                 @lines = split /\n/, $line;
 246             }
 247             my $mandatory = ($requirelevel =~ /(mandatory|requi|oblig|necess)/i);
 248             push @frameworklist,
 249               {
 250                 'fwkname'        => $name,
 251                 'fwkfile'        => "$dir/$requirelevel/$_",
 252                 'fwkdescription' => \@lines,
 253                 'checked'        => ( ( $frameworksloaded{$_} || $mandatory ) ? 1 : 0 ),
 254                 'mandatory'      => $mandatory,
 255               };
 256         } @listname;
 257         my @fwks = sort { $a->{'fwkname'} cmp $b->{'fwkname'} } @frameworklist;
 258
 259         $cell{"frameworks"} = \@fwks;
 260         $cell{"label"}      = ($requirelevel =~ /(mandatory|requi|oblig|necess)/i)?'mandatory':'optional';
 261         $cell{"code"}       = lc($requirelevel);
 262         push @levellist, \%cell;
 263     }
 264
 265     return ($defaulted_to_en, \@levellist);
 266 }
 267
 268 =head2 load_db_schema
 269
 270   my $error = $installer->load_db_schema();
 271
 272 Loads the SQL script that creates Koha's tables and indexes.  The
 273 return value is a string containing error messages reported by the
 274 load.
 275
 276 =cut
 277
 278 sub load_db_schema {
 279     my $self = shift;
 280
 281     my $datadir = C4::Context->config('intranetdir') . "/installer/data/$self->{dbms}";
 282     my $error = $self->load_sql("$datadir/kohastructure.sql");
 283     return $error;
 284
 285 }
 286
 287 =head2 load_sql_in_order
 288
 289   my ($fwk_language, $list) = $installer->load_sql_in_order($all_languages, @sql_list);
 290
 291 Given a list of SQL scripts supplied in C<@sql_list>, loads each of them
 292 into the database and sets the FrameworksLoaded system preference to names
 293 of the scripts that were loaded.
 294
 295 The SQL files are loaded in alphabetical order by filename (not including
 296 directory path).  This means that dependencies among the scripts are to
 297 be resolved by carefully naming them, keeping in mind that the directory name
 298 does *not* currently count.
 299
 300 B<FIXME:> this is a rather delicate way of dealing with dependencies between
 301 the install scripts.
 302
 303 The return value C<$list> is an arrayref containing a hashref for each
 304 "level" or directory containing SQL scripts; the hashref in turns contains
 305 a list of hashrefs containing a list of each script load and any error
 306 messages associated with the loading of each script.
 307
 308 B<FIXME:> The C<$fwk_language> code probably doesn't belong and needs to be
 309 moved to a different method.
 310
 311 =cut
 312
 313 sub load_sql_in_order {
 314     my $self = shift;
 315     my $all_languages = shift;
 316     my @sql_list = @_;
 317
 318     my $lang;
 319     my %hashlevel;
 320     my @fnames = sort {
 321         my @aa = split /\/|\\/, ($a);
 322         my @bb = split /\/|\\/, ($b);
 323         $aa[-1] cmp $bb[-1]
 324     } @sql_list;
 325     my $request = $self->{'dbh'}->prepare( "SELECT value FROM systempreferences WHERE variable='FrameworksLoaded'" );
 326     $request->execute;
 327     my ($systempreference) = $request->fetchrow;
 328     $systempreference = '' unless defined $systempreference; # avoid warning
 329
 330     my $global_mandatory_dir = C4::Context->config('intranetdir') . "/installer/data/$self->{dbms}/mandatory";
 331
 332     # Make sure some stuffs are loaded first
 333     unshift(@fnames, C4::Context->config('intranetdir') . "/installer/data/$self->{dbms}/sysprefs.sql");
 334     unshift(@fnames,
 335         "$global_mandatory_dir/subtag_registry.sql",
 336         "$global_mandatory_dir/auth_val_cat.sql",
 337         "$global_mandatory_dir/message_transport_types.sql",
 338         "$global_mandatory_dir/sample_notices_message_attributes.sql",
 339         "$global_mandatory_dir/sample_notices_message_transports.sql",
 340         "$global_mandatory_dir/keyboard_shortcuts.sql",
 341     );
 342
 343     push @fnames, C4::Context->config('intranetdir') . "/installer/data/mysql/userflags.sql";
 344     push @fnames, C4::Context->config('intranetdir') . "/installer/data/mysql/userpermissions.sql";
 345     push @fnames, C4::Context->config('intranetdir') . "/installer/data/mysql/audio_alerts.sql";
 346     push @fnames, C4::Context->config('intranetdir') . "/installer/data/mysql/account_offset_types.sql";
 347     push @fnames, C4::Context->config('intranetdir') . "/installer/data/mysql/account_credit_types.sql";
 348     push @fnames, C4::Context->config('intranetdir') . "/installer/data/mysql/account_debit_types.sql";
 349     foreach my $file (@fnames) {
 350         #      warn $file;
 351         undef $/;
 352         my $error = $self->load_sql($file);
 353         my @file = split qr(\/|\\), $file;
 354         $lang = $file[ scalar(@file) - 3 ] unless ($lang);
 355         my $level = $file[ scalar(@file) - 2 ];
 356         unless ($error) {
 357             $systempreference .= "$file[scalar(@file)-1]|"
 358               unless ( index( $systempreference, $file[ scalar(@file) - 1 ] ) >= 0 );
 359         }
 360
 361         #Bulding here a hierarchy to display files by level.
 362         push @{ $hashlevel{$level} },
 363           { "fwkname" => $file[ scalar(@file) - 1 ], "error" => $error };
 364     }
 365
 366     #systempreference contains an ending |
 367     chop $systempreference;
 368     my @list;
 369     map { push @list, { "level" => $_, "fwklist" => $hashlevel{$_} } } keys %hashlevel;
 370     my $fwk_language;
 371     for my $each_language (@$all_languages) {
 372
 373         #       warn "CODE".$each_language->{'language_code'};
 374         #       warn "LANG:".$lang;
 375         if ( $lang eq $each_language->{'language_code'} ) {
 376             $fwk_language = $each_language->{language_locale_name};
 377         }
 378     }
 379     my $updateflag =
 380       $self->{'dbh'}->do(
 381         "UPDATE systempreferences set value=\"$systempreference\" where variable='FrameworksLoaded'"
 382       );
 383
 384     unless ( $updateflag == 1 ) {
 385         my $string =
 386             "INSERT INTO systempreferences (value, variable, explanation, type) VALUES (\"$systempreference\",'FrameworksLoaded','Frameworks loaded through webinstaller','choice')";
 387         my $rq = $self->{'dbh'}->prepare($string);
 388         $rq->execute;
 389     }
 390     return ($fwk_language, \@list);
 391 }
 392
 393 =head2 set_marcflavour_syspref
 394
 395   $installer->set_marcflavour_syspref($marcflavour);
 396
 397 Set the 'marcflavour' system preference.  The incoming
 398 C<$marcflavour> references to a subdirectory of
 399 installer/data/$dbms/$lang/marcflavour, and is
 400 normalized to MARC21, UNIMARC or NORMARC.
 401
 402 FIXME: this method assumes that the MARC flavour will be either
 403 MARC21, UNIMARC or NORMARC.
 404
 405 =cut
 406
 407 sub set_marcflavour_syspref {
 408     my $self = shift;
 409     my $marcflavour = shift;
 410
 411     # we can have some variants of marc flavour, by having different directories, like : unimarc_small and unimarc_full, for small and complete unimarc frameworks.
 412     # marc_cleaned finds the marcflavour, without the variant.
 413     my $marc_cleaned = 'MARC21';
 414     $marc_cleaned = 'UNIMARC' if $marcflavour =~ /unimarc/i;
 415     $marc_cleaned = 'NORMARC' if $marcflavour =~ /normarc/i;
 416     my $request =
 417         $self->{'dbh'}->prepare(
 418           "INSERT IGNORE INTO `systempreferences` (variable,value,explanation,options,type) VALUES('marcflavour','$marc_cleaned','Define global MARC flavor (MARC21, UNIMARC or NORMARC) used for character encoding','MARC21|UNIMARC|NORMARC','Choice');"
 419         );
 420     $request->execute;
 421 }
 422
 423 =head2 set_version_syspref
 424
 425   $installer->set_version_syspref();
 426
 427 Set or update the 'Version' system preference to the current
 428 Koha software version.
 429
 430 =cut
 431
 432 sub set_version_syspref {
 433     my $self = shift;
 434
 435     my $kohaversion = Koha::version();
 436     # remove the 3 last . to have a Perl number
 437     $kohaversion =~ s/(.*\..*)\.(.*)\.(.*)/$1$2$3/;
 438     if (C4::Context->preference('Version')) {
 439         warn "UPDATE Version";
 440         my $finish=$self->{'dbh'}->prepare("UPDATE systempreferences SET value=? WHERE variable='Version'");
 441         $finish->execute($kohaversion);
 442     } else {
 443         warn "INSERT Version";
 444         my $finish=$self->{'dbh'}->prepare("INSERT into systempreferences (variable,value,explanation) values ('Version',?,'The Koha database version. WARNING: Do not change this value manually, it is maintained by the webinstaller')");
 445         $finish->execute($kohaversion);
 446     }
 447     C4::Context->clear_syspref_cache();
 448 }
 449
 450 =head2 set_languages_syspref
 451
 452   $installer->set_languages_syspref();
 453
 454 Add the installation language to 'language' and 'opaclanguages' system preferences
 455 if different from 'en'
 456
 457 =cut
 458
 459 sub set_languages_syspref {
 460     my $self     = shift;
 461     my $language = shift;
 462
 463     return if ( not $language or $language eq 'en' );
 464
 465     warn "UPDATE Languages";
 466     # intranet
 467     my $pref = $self->{'dbh'}->prepare("UPDATE systempreferences SET value=? WHERE variable='language'");
 468     $pref->execute("en,$language");
 469     # opac
 470     $pref = $self->{'dbh'}->prepare("UPDATE systempreferences SET value=? WHERE variable='opaclanguages'");
 471     $pref->execute("en,$language");
 472
 473     C4::Context->clear_syspref_cache();
 474 }
 475
 476 =head2 process_yml_table
 477
 478   my $query_info   = $installer->process_yml_table($table);
 479
 480 Analyzes a table loaded in YAML format.
 481 Returns the values required to build an insert statement.
 482
 483 =cut
 484
 485 sub process_yml_table {
 486     my ($table) = @_;
 487     my $table_name   = ( keys %$table )[0];                          # table name
 488     my @rows         = @{ $table->{$table_name}->{rows} };           #
 489     my @columns      = ( sort keys %{$rows[0]} );                    # column names
 490     my $fields       = join ",", map{sprintf("`%s`", $_)} @columns;  # idem, joined
 491     my $query        = "INSERT INTO $table_name ( $fields ) VALUES ";
 492     my @multiline    = @{ $table->{$table_name}->{'multiline'} };    # to check multiline values;
 493     my $placeholders = '(' . join ( ",", map { "?" } @columns ) . ')'; # '(?,..,?)' string
 494     my @values;
 495     foreach my $row ( @rows ) {
 496         push @values, [ map {
 497                         my $col = $_;
 498                         ( @multiline and grep { $_ eq $col } @multiline )
 499                         ? join "\r\n", @{$row->{$col}}                # join multiline values
 500                         : $row->{$col};
 501                      } @columns ];
 502     }
 503     return { query => $query, placeholders => $placeholders, values => \@values };
 504 }
 505
 506 =head2 load_sql
 507
 508   my $error = $installer->load_sql($filename);
 509
 510 Runs the specified input file using a sql loader DBIx::RunSQL, or a yaml loader
 511 Returns any strings sent to STDERR
 512
 513 # FIXME This should be improved: sometimes the caller and load_sql warn the same
 514 error.
 515
 516 =cut
 517
 518 sub load_sql {
 519     my $self = shift;
 520     my $filename = shift;
 521     my $error;
 522
 523     my $dbh = $self->{ dbh };
 524
 525     my $dup_stderr;
 526     do {
 527         local *STDERR;
 528         open STDERR, ">>", \$dup_stderr;
 529
 530         if ( $filename =~ /sql$/ ) {                                                        # SQL files
 531             eval {
 532                 DBIx::RunSQL->run_sql_file(
 533                     dbh     => $dbh,
 534                     sql     => $filename,
 535                 );
 536             };
 537         }
 538         else {                                                                       # YAML files
 539             eval {
 540                 my $yaml         = LoadFile( $filename );                            # Load YAML
 541                 for my $table ( @{ $yaml->{'tables'} } ) {
 542                     my $query_info   = process_yml_table($table);
 543                     my $query        = $query_info->{query};
 544                     my $placeholders = $query_info->{placeholders};
 545                     my $values       = $query_info->{values};
 546                     # Doing only 1 INSERT query for the whole table
 547                     my @all_rows_values = map { @$_ } @$values;
 548                     $query .= join ', ', ( $placeholders ) x scalar @$values;
 549                     $dbh->do( $query, undef, @all_rows_values );
 550                 }
 551                 for my $statement ( @{ $yaml->{'sql_statements'} } ) {               # extra SQL statements
 552                     $dbh->do($statement);
 553                 }
 554             };
 555         }
 556         if ($@){
 557             warn "Something went wrong loading file $filename ($@)";
 558         }
 559     };
 560     #   errors thrown while loading installer data should be logged
 561     if( $dup_stderr ) {
 562         warn "C4::Installer::load_sql returned the following errors while attempting to load $filename:\n";
 563         $error = $dup_stderr;
 564     }
 565
 566     return $error;
 567 }
 568
 569 =head2 get_file_path_from_name
 570
 571   my $filename = $installer->get_file_path_from_name('script_name');
 572
 573 searches through the set of known SQL scripts and finds the fully
 574 qualified path name for the script that mathches the input.
 575
 576 returns undef if no match was found.
 577
 578
 579 =cut
 580
 581 sub get_file_path_from_name {
 582     my $self = shift;
 583     my $partialname = shift;
 584
 585     my $lang = 'en'; # FIXME: how do I know what language I want?
 586
 587     my ($defaulted_to_en, $list) = $self->sample_data_sql_list($lang);
 588     # warn( Data::Dumper->Dump( [ $list ], [ 'list' ] ) );
 589
 590     my @found;
 591     foreach my $frameworklist ( @$list ) {
 592         push @found, grep { $_->{'fwkfile'} =~ /$partialname$/ } @{$frameworklist->{'frameworks'}};
 593     }
 594
 595     # warn( Data::Dumper->Dump( [ \@found ], [ 'found' ] ) );
 596     if ( 0 == scalar @found ) {
 597         return;
 598     } elsif ( 1 < scalar @found ) {
 599         warn "multiple results found for $partialname";
 600         return;
 601     } else {
 602         return $found[0]->{'fwkfile'};
 603     }
 604
 605 }
 606
 607 sub foreign_key_exists {
 608     my ( $table_name, $constraint_name ) = @_;
 609     my $dbh = C4::Context->dbh;
 610     my (undef, $infos) = $dbh->selectrow_array(qq|SHOW CREATE TABLE $table_name|);
 611     return $infos =~ m|CONSTRAINT `$constraint_name` FOREIGN KEY|;
 612 }
 613
 614 sub index_exists {
 615     my ( $table_name, $key_name ) = @_;
 616     my $dbh = C4::Context->dbh;
 617     my ($exists) = $dbh->selectrow_array(
 618         qq|
 619         SHOW INDEX FROM $table_name
 620         WHERE key_name = ?
 621         |, undef, $key_name
 622     );
 623     return $exists;
 624 }
 625
 626 sub column_exists {
 627     my ( $table_name, $column_name ) = @_;
 628     return unless TableExists($table_name);
 629     my $dbh = C4::Context->dbh;
 630     my ($exists) = $dbh->selectrow_array(
 631         qq|
 632         SHOW COLUMNS FROM $table_name
 633         WHERE Field = ?
 634         |, undef, $column_name
 635     );
 636     return $exists;
 637 }
 638
 639 sub TableExists { # Could be renamed table_exists for consistency
 640     my $table = shift;
 641     eval {
 642                 my $dbh = C4::Context->dbh;
 643                 local $dbh->{PrintError} = 0;
 644                 local $dbh->{RaiseError} = 1;
 645                 $dbh->do(qq{SELECT * FROM $table WHERE 1 = 0 });
 646             };
 647     return 1 unless $@;
 648     return 0;
 649 }
 650
 651
 652 =head1 AUTHOR
 653
 654 C4::Installer is a refactoring of logic originally from installer/installer.pl, which was
 655 originally written by Henri-Damien Laurant.
 656
 657 Koha Development Team <http://koha-community.org/>
 658
 659 Galen Charlton <galen.charlton@liblime.com>
 660
 661 =cut
 662
 663 1;