C4/Creators/Batch.pm

   1 package C4::Creators::Batch;
   2
   3 use strict;
   4 use warnings;
   5
   6 use autouse 'Data::Dumper' => qw(Dumper);
   7
   8 use C4::Context;
   9 use C4::Debug;
  10
  11
  12 sub _check_params {
  13     my $given_params = {};
  14     my $exit_code = 0;
  15     my @valid_template_params = (
  16         'label_id',
  17         'batch_id',
  18         'description',
  19         'item_number',
  20         'card_number',
  21         'branch_code',
  22         'creator',
  23     );
  24     if (scalar(@_) >1) {
  25         $given_params = {@_};
  26         foreach my $key (keys %{$given_params}) {
  27             if (!(grep m/$key/, @valid_template_params)) {
  28                 warn sprintf('Unrecognized parameter type of "%s".', $key);
  29                 $exit_code = 1;
  30             }
  31         }
  32     }
  33     else {
  34         if (!(grep m/$_/, @valid_template_params)) {
  35             warn sprintf('Unrecognized parameter type of %s', $_);
  36             $exit_code = 1;
  37         }
  38     }
  39     return $exit_code;
  40 }
  41
  42 sub new {
  43     my ($invocant) = shift;
  44     my $type = ref($invocant) || $invocant;
  45     my $self = {
  46         batch_id        => 0,
  47         description     => '',
  48         items           => [],
  49         branch_code     => 'NB',
  50         batch_stat      => 0,   # False if any data has changed and the db has not been updated
  51         @_,
  52     };
  53     bless ($self, $type);
  54     return $self;
  55 }
  56
  57 sub add_item {
  58     my $self = shift;
  59     my $number = shift;
  60     ref($self) =~ m/C4::(.+)::.+$/;
  61     my $number_type = ($1 eq 'Patroncards' ? 'borrower_number' : 'item_number');
  62     if ($self->{'batch_id'} == 0){ #if this is a new batch batch_id must be created
  63         my $sth = C4::Context->dbh->prepare("SELECT MAX(batch_id) FROM creator_batches;");
  64         $sth->execute();
  65         my $batch_id = $sth->fetchrow_array;
  66         $self->{'batch_id'}= ++$batch_id;
  67     }
  68     my $query = "INSERT INTO creator_batches (batch_id, description, $number_type, branch_code, creator) VALUES (?,?,?,?,?);";
  69     my $sth = C4::Context->dbh->prepare($query);
  70 #    $sth->{'TraceLevel'} = 3;
  71     $sth->execute($self->{'batch_id'}, $self->{'description'}, $number, $self->{'branch_code'}, $1);
  72     if ($sth->err) {
  73        warn sprintf('Database returned the following error on attempted INSERT: %s', $sth->errstr);
  74         return -1;
  75     }
  76     $query = "SELECT max(label_id) FROM creator_batches WHERE batch_id=? AND $number_type=? AND branch_code=?;";
  77     my $sth1 = C4::Context->dbh->prepare($query);
  78     $sth1->execute($self->{'batch_id'}, $number, $self->{'branch_code'});
  79     my $label_id = $sth1->fetchrow_array;
  80     push (@{$self->{'items'}}, {$number_type => $number, label_id => $label_id});
  81     $self->{'batch_stat'} = 1;
  82     return 0;
  83 }
  84
  85 sub get_attr {
  86     my $self = shift;
  87     return $self->{$_[0]};
  88 }
  89
  90 sub remove_item {
  91     my $self = shift;
  92     my $label_id = shift;
  93     my $query = "DELETE FROM creator_batches WHERE label_id=? AND batch_id=?;";
  94     my $sth = C4::Context->dbh->prepare($query);
  95 #    $sth->{'TraceLevel'} = 3;
  96     $sth->execute($label_id, $self->{'batch_id'});
  97     if ($sth->err) {
  98         warn sprintf('Database returned the following error on attempted DELETE: %s', $sth->errstr);
  99         return -1;
 100     }
 101     @{$self->{'items'}} = grep{$_->{'label_id'} != $label_id} @{$self->{'items'}};
 102     $self->{'batch_stat'} = 1;
 103     return 0;
 104 }
 105
 106 # FIXME: This method is effectively useless the way the current add_item method is written. Ideally, the items should be added to the object
 107 #       and then the save method called. This does not work well in practice due to the inability to pass objects across cgi script calls.
 108 #       I'm leaving it here because it should be here and for consistency's sake and once memcached support is fully implemented this should be as well. -cnighswonger
 109 #
 110 #=head2 $batch->save()
 111 #
 112 #    Invoking the I<save> method attempts to insert the batch into the database. The method returns
 113 #    the new record batch_id upon success and -1 upon failure (This avoids conflicting with a record
 114 #    batch_id of 1). Errors are logged to the Apache log.
 115 #
 116 #    example:
 117 #        my $exitstat = $batch->save(); # to save the record behind the $batch object
 118 #
 119 #=cut
 120 #
 121 #sub save {
 122 #    my $self = shift;
 123 #    foreach my $item_number (@{$self->{'items'}}) {
 124 #        my $query = "INSERT INTO creator_batches (batch_id, item_number, branch_code) VALUES (?,?,?);";
 125 #        my $sth1 = C4::Context->dbh->prepare($query);
 126 #        $sth1->execute($self->{'batch_id'}, $item_number->{'item_number'}, $self->{'branch_code'});
 127 #        if ($sth1->err) {
 128 #            warn sprintf('Database returned the following error on attempted INSERT: %s', $sth1->errstr);
 129 #            return -1;
 130 #        }
 131 #        $self->{'batch_stat'} = 1;
 132 #        return $self->{'batch_id'};
 133 #    }
 134 #}
 135
 136 sub retrieve {
 137     my $invocant = shift;
 138     my %opts = @_;
 139     my $type = ref($invocant) || $invocant;
 140     $type =~ m/C4::(.+)::.+$/;
 141     my $number_type = ($1 eq 'Patroncards' ? 'borrower_number' : 'item_number');
 142     my $record_flag = 0;
 143     my $query = "SELECT * FROM creator_batches WHERE batch_id = ? ORDER BY label_id";
 144     my $sth = C4::Context->dbh->prepare($query);
 145 #    $sth->{'TraceLevel'} = 3;
 146     $sth->execute($opts{'batch_id'});
 147     my $self = {
 148         batch_id        => $opts{'batch_id'},
 149         items           => [],
 150     };
 151     while (my $record = $sth->fetchrow_hashref) {
 152         $self->{'branch_code'} = $record->{'branch_code'};
 153         $self->{'creator'} = $record->{'creator'};
 154         $self->{'description'} = $record->{'description'};
 155         push (@{$self->{'items'}}, {$number_type => $record->{$number_type}, label_id => $record->{'label_id'}});
 156         $record_flag = 1;       # true if one or more rows were retrieved
 157     }
 158     return -2 if $record_flag == 0;     # a hackish sort of way of indicating no such record exists
 159     if ($sth->err) {
 160         warn sprintf('Database returned the following error on attempted SELECT: %s', $sth->errstr);
 161         return -1;
 162     }
 163     $self->{'batch_stat'} = 1;
 164     bless ($self, $type);
 165     return $self;
 166 }
 167
 168 sub delete {
 169     my $self = {};
 170     my %opts = ();
 171     my $call_type = '';
 172     my @query_params = ();
 173     if (ref($_[0])) {
 174         $self = shift;  # check to see if this is a method call
 175         $call_type = 'C4::Labels::Batch->delete'; # seems hackish
 176         @query_params = ($self->{'batch_id'}, $self->{'branch_code'});
 177     }
 178     else {
 179         shift @_;
 180         %opts = @_;
 181         $call_type = 'C4::Labels::Batch::delete';
 182         @query_params = ($opts{'batch_id'}, $opts{'branch_code'});
 183     }
 184     if ($query_params[0] eq '') {   # If there is no template id then we cannot delete it
 185         warn sprintf('%s : Cannot delete batch as the batch id is invalid or non-existent.', $call_type);
 186         return -1;
 187     }
 188     my $query = "DELETE FROM creator_batches WHERE batch_id = ? AND branch_code =?";
 189     my $sth = C4::Context->dbh->prepare($query);
 190 #    $sth->{'TraceLevel'} = 3;
 191     $sth->execute(@query_params);
 192     if ($sth->err) {
 193         warn sprintf('%s : Database returned the following error on attempted INSERT: %s', $call_type, $sth->errstr);
 194         return -1;
 195     }
 196     return 0;
 197 }
 198
 199 sub remove_duplicates {
 200     my $self = shift;
 201     my %seen=();
 202     my $query = "DELETE FROM creator_batches WHERE label_id = ?;"; # ORDER BY timestamp ASC LIMIT ?;";
 203     my $sth = C4::Context->dbh->prepare($query);
 204     my @duplicate_items = grep{
 205         $_->{'item_number'}
 206             ? $seen{$_->{'item_number'}}++
 207             : $seen{$_->{'borrower_number'}}++
 208     } @{$self->{'items'}};
 209     foreach my $item (@duplicate_items) {
 210         $sth->execute($item->{'label_id'});
 211         if ($sth->err) {
 212             warn sprintf('Database returned the following error on attempted DELETE for label_id %s: %s', $item->{'label_id'}, $sth->errstr);
 213             return -1;
 214         }
 215         $sth->finish(); # Per DBI.pm docs: "If execute() is called on a statement handle that's still active ($sth->{Active} is true) then it should effectively call finish() to tidy up the previous execution results before starting this new execution."
 216         @{$self->{'items'}} = grep{$_->{'label_id'} != $item->{'label_id'}} @{$self->{'items'}};  # the correct label/item must be removed from the current batch object as well; this should be done *after* each sql DELETE in case the DELETE fails
 217     }
 218     return scalar(@duplicate_items);
 219 }
 220
 221 1;
 222 __END__
 223
 224 =head1 NAME
 225
 226 C4::Labels::Batch - A class for creating and manipulating batch objects in Koha
 227
 228 =head1 ABSTRACT
 229
 230 This module provides methods for creating, and otherwise manipulating batch objects used by Koha to create and export labels.
 231
 232 =head1 METHODS
 233
 234 =head2 new()
 235
 236     Invoking the I<new> method constructs a new batch object with no items. It is possible to pre-populate the batch with items and a branch code by passing them
 237     as in the second example below.
 238
 239     B<NOTE:> The items list must be an arrayref pointing to an array of hashes containing a key/data pair after this fashion: {item_number => item_number}. The order of
 240     the array elements determines the order of the items in the batch.
 241
 242     example:
 243         C<my $batch = C4::Labels::Batch->new(); # Creates and returns a new batch object>
 244
 245         C<my $batch = C4::Labels::Batch->new(items => $arrayref, branch_code => branch_code) #    Creates and returns a new batch object containing the items passed in
 246             with the branch code passed in.>
 247
 248     B<NOTE:> This batch is I<not> written to the database until C<$batch->save()> is invoked. You have been warned!
 249
 250 =head2 $batch->add_item(item_number => $item_number, branch_code => $branch_code)
 251
 252     Invoking the I<add_item> method will add the supplied item to the batch object.
 253
 254     example:
 255         $batch->add_item(item_number => $item_number, branch_code => $branch_code);
 256
 257 =head2 $batch->get_attr($attribute)
 258
 259     Invoking the I<get_attr> method will return the requested attribute.
 260
 261     example:
 262         my @items = $batch->get_attr('items');
 263
 264 =head2 $batch->remove_item($item_number)
 265
 266     Invoking the I<remove_item> method will remove the supplied item number from the batch object.
 267
 268     example:
 269         $batch->remove_item($item_number);
 270
 271 =head2 C4::Labels::Batch->retrieve(batch_id => $batch_id)
 272
 273     Invoking the I<retrieve> method constructs a new batch object containing the current values for batch_id. The method returns a new object upon success and 1 upon failure.
 274     Errors are logged to the Apache log.
 275
 276     examples:
 277
 278         my $batch = C4::Labels::Batch->retrieve(batch_id => 1); # Retrieves batch 1 and returns an object containing the record
 279
 280 =head2 delete()
 281
 282     Invoking the delete method attempts to delete the template from the database. The method returns -1 upon failure. Errors are logged to the Apache log.
 283     NOTE: This method may also be called as a function and passed a key/value pair simply deleteing that batch from the database. See the example below.
 284
 285     examples:
 286         my $exitstat = $batch->delete(); # to delete the record behind the $batch object
 287         my $exitstat = C4::Labels::Batch->delete(batch_id => 1); # to delete batch 1
 288
 289 =head2 remove_duplicates()
 290
 291     Invoking the remove_duplicates method attempts to remove duplicate items in the batch from the database. The method returns the count of duplicate records removed upon
 292     success and -1 upon failure. Errors are logged to the Apache log.
 293     NOTE: This method may also be called as a function and passed a key/value pair removing duplicates in the batch passed in. See the example below.
 294
 295     examples:
 296         my $remove_count = $batch->remove_duplicates(); # to remove duplicates the record behind the $batch object
 297         my $remove_count = C4::Labels::Batch->remove_duplicates(batch_id => 1); # to remove duplicates in batch 1
 298
 299 =head1 AUTHOR
 300
 301 Chris Nighswonger <cnighswonger AT foundations DOT edu>
 302
 303 =head1 COPYRIGHT
 304
 305 Copyright 2009 Foundations Bible College.
 306
 307 =head1 LICENSE
 308
 309 This file is part of Koha.
 310
 311 Koha is free software; you can redistribute it and/or modify it
 312 under the terms of the GNU General Public License as published by
 313 the Free Software Foundation; either version 3 of the License, or
 314 (at your option) any later version.
 315
 316 Koha is distributed in the hope that it will be useful, but
 317 WITHOUT ANY WARRANTY; without even the implied warranty of
 318 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 319 GNU General Public License for more details.
 320
 321 You should have received a copy of the GNU General Public License
 322 along with Koha; if not, see <http://www.gnu.org/licenses>.
 323
 324 =head1 DISCLAIMER OF WARRANTY
 325
 326 Koha is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 327 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 328
 329 =cut
 330