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         'item_number',
  19         'card_number',
  20         'branch_code',
  21         'creator',
  22     );
  23     if (scalar(@_) >1) {
  24         $given_params = {@_};
  25         foreach my $key (keys %{$given_params}) {
  26             if (!(grep m/$key/, @valid_template_params)) {
  27                 warn sprintf('Unrecognized parameter type of "%s".', $key);
  28                 $exit_code = 1;
  29             }
  30         }
  31     }
  32     else {
  33         if (!(grep m/$_/, @valid_template_params)) {
  34             warn sprintf('Unrecognized parameter type of %s', $_);
  35             $exit_code = 1;
  36         }
  37     }
  38     return $exit_code;
  39 }
  40
  41 sub new {
  42     my ($invocant) = shift;
  43     my $type = ref($invocant) || $invocant;
  44     my $self = {
  45         batch_id        => 0,
  46         items           => [],
  47         branch_code     => 'NB',
  48         batch_stat      => 0,   # False if any data has changed and the db has not been updated
  49         @_,
  50     };
  51     bless ($self, $type);
  52     return $self;
  53 }
  54
  55 sub add_item {
  56     my $self = shift;
  57     my $number = shift;
  58     ref($self) =~ m/C4::(.+)::.+$/;
  59     my $number_type = ($1 eq 'Patroncards' ? 'borrower_number' : 'item_number');
  60     if ($self->{'batch_id'} == 0){ #if this is a new batch batch_id must be created
  61         my $sth = C4::Context->dbh->prepare("SELECT MAX(batch_id) FROM creator_batches;");
  62         $sth->execute();
  63         my $batch_id = $sth->fetchrow_array;
  64         $self->{'batch_id'}= ++$batch_id;
  65     }
  66     my $query = "INSERT INTO creator_batches (batch_id, $number_type, branch_code, creator) VALUES (?,?,?,?);";
  67     my $sth = C4::Context->dbh->prepare($query);
  68 #    $sth->{'TraceLevel'} = 3;
  69     $sth->execute($self->{'batch_id'}, $number, $self->{'branch_code'}, $1);
  70     if ($sth->err) {
  71        warn sprintf('Database returned the following error on attempted INSERT: %s', $sth->errstr);
  72         return -1;
  73     }
  74     $query = "SELECT max(label_id) FROM creator_batches WHERE batch_id=? AND $number_type=? AND branch_code=?;";
  75     my $sth1 = C4::Context->dbh->prepare($query);
  76     $sth1->execute($self->{'batch_id'}, $number, $self->{'branch_code'});
  77     my $label_id = $sth1->fetchrow_array;
  78     push (@{$self->{'items'}}, {$number_type => $number, label_id => $label_id});
  79     $self->{'batch_stat'} = 1;
  80     return 0;
  81 }
  82
  83 sub get_attr {
  84     my $self = shift;
  85     return $self->{$_[0]};
  86 }
  87
  88 sub remove_item {
  89     my $self = shift;
  90     my $label_id = shift;
  91     my $query = "DELETE FROM creator_batches WHERE label_id=? AND batch_id=?;";
  92     my $sth = C4::Context->dbh->prepare($query);
  93 #    $sth->{'TraceLevel'} = 3;
  94     $sth->execute($label_id, $self->{'batch_id'});
  95     if ($sth->err) {
  96         warn sprintf('Database returned the following error on attempted DELETE: %s', $sth->errstr);
  97         return -1;
  98     }
  99     @{$self->{'items'}} = grep{$_->{'label_id'} != $label_id} @{$self->{'items'}};
 100     $self->{'batch_stat'} = 1;
 101     return 0;
 102 }
 103
 104 # FIXME: This method is effectively useless the way the current add_item method is written. Ideally, the items should be added to the object
 105 #       and then the save method called. This does not work well in practice due to the inability to pass objects across cgi script calls.
 106 #       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
 107 #
 108 #=head2 $batch->save()
 109 #
 110 #    Invoking the I<save> method attempts to insert the batch into the database. The method returns
 111 #    the new record batch_id upon success and -1 upon failure (This avoids conflicting with a record
 112 #    batch_id of 1). Errors are logged to the Apache log.
 113 #
 114 #    example:
 115 #        my $exitstat = $batch->save(); # to save the record behind the $batch object
 116 #
 117 #=cut
 118 #
 119 #sub save {
 120 #    my $self = shift;
 121 #    foreach my $item_number (@{$self->{'items'}}) {
 122 #        my $query = "INSERT INTO creator_batches (batch_id, item_number, branch_code) VALUES (?,?,?);";
 123 #        my $sth1 = C4::Context->dbh->prepare($query);
 124 #        $sth1->execute($self->{'batch_id'}, $item_number->{'item_number'}, $self->{'branch_code'});
 125 #        if ($sth1->err) {
 126 #            warn sprintf('Database returned the following error on attempted INSERT: %s', $sth1->errstr);
 127 #            return -1;
 128 #        }
 129 #        $self->{'batch_stat'} = 1;
 130 #        return $self->{'batch_id'};
 131 #    }
 132 #}
 133
 134 sub retrieve {
 135     my $invocant = shift;
 136     my %opts = @_;
 137     my $type = ref($invocant) || $invocant;
 138     $type =~ m/C4::(.+)::.+$/;
 139     my $number_type = ($1 eq 'Patroncards' ? 'borrower_number' : 'item_number');
 140     my $record_flag = 0;
 141     my $query = "SELECT * FROM creator_batches WHERE batch_id = ? ORDER BY label_id";
 142     my $sth = C4::Context->dbh->prepare($query);
 143 #    $sth->{'TraceLevel'} = 3;
 144     $sth->execute($opts{'batch_id'});
 145     my $self = {
 146         batch_id        => $opts{'batch_id'},
 147         items           => [],
 148     };
 149     while (my $record = $sth->fetchrow_hashref) {
 150         $self->{'branch_code'} = $record->{'branch_code'};
 151         $self->{'creator'} = $record->{'creator'};
 152         push (@{$self->{'items'}}, {$number_type => $record->{$number_type}, label_id => $record->{'label_id'}});
 153         $record_flag = 1;       # true if one or more rows were retrieved
 154     }
 155     return -2 if $record_flag == 0;     # a hackish sort of way of indicating no such record exists
 156     if ($sth->err) {
 157         warn sprintf('Database returned the following error on attempted SELECT: %s', $sth->errstr);
 158         return -1;
 159     }
 160     $self->{'batch_stat'} = 1;
 161     bless ($self, $type);
 162     return $self;
 163 }
 164
 165 sub delete {
 166     my $self = {};
 167     my %opts = ();
 168     my $call_type = '';
 169     my @query_params = ();
 170     if (ref($_[0])) {
 171         $self = shift;  # check to see if this is a method call
 172         $call_type = 'C4::Labels::Batch->delete'; # seems hackish
 173         @query_params = ($self->{'batch_id'}, $self->{'branch_code'});
 174     }
 175     else {
 176         shift @_;
 177         %opts = @_;
 178         $call_type = 'C4::Labels::Batch::delete';
 179         @query_params = ($opts{'batch_id'}, $opts{'branch_code'});
 180     }
 181     if ($query_params[0] eq '') {   # If there is no template id then we cannot delete it
 182         warn sprintf('%s : Cannot delete batch as the batch id is invalid or non-existent.', $call_type);
 183         return -1;
 184     }
 185     my $query = "DELETE FROM creator_batches WHERE batch_id = ? AND branch_code =?";
 186     my $sth = C4::Context->dbh->prepare($query);
 187 #    $sth->{'TraceLevel'} = 3;
 188     $sth->execute(@query_params);
 189     if ($sth->err) {
 190         warn sprintf('%s : Database returned the following error on attempted INSERT: %s', $call_type, $sth->errstr);
 191         return -1;
 192     }
 193     return 0;
 194 }
 195
 196 sub remove_duplicates {
 197     my $self = shift;
 198     my %seen=();
 199     my $query = "DELETE FROM creator_batches WHERE label_id = ?;"; # ORDER BY timestamp ASC LIMIT ?;";
 200     my $sth = C4::Context->dbh->prepare($query);
 201     my @duplicate_items = grep{
 202         $_->{'item_number'}
 203             ? $seen{$_->{'item_number'}}++
 204             : $seen{$_->{'borrower_number'}}++
 205     } @{$self->{'items'}};
 206     foreach my $item (@duplicate_items) {
 207         $sth->execute($item->{'label_id'});
 208         if ($sth->err) {
 209             warn sprintf('Database returned the following error on attempted DELETE for label_id %s: %s', $item->{'label_id'}, $sth->errstr);
 210             return -1;
 211         }
 212         $sth->finish(); # Per DBI.pm docs: "If execute() is called on a statement handle that's still active ($sth->{Active} is true) then it should effectively call finish() to tidy up the previous execution results before starting this new execution."
 213         @{$self->{'items'}} = grep{$_->{'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
 214     }
 215     return scalar(@duplicate_items);
 216 }
 217
 218 1;
 219 __END__
 220
 221 =head1 NAME
 222
 223 C4::Labels::Batch - A class for creating and manipulating batch objects in Koha
 224
 225 =head1 ABSTRACT
 226
 227 This module provides methods for creating, and otherwise manipulating batch objects used by Koha to create and export labels.
 228
 229 =head1 METHODS
 230
 231 =head2 new()
 232
 233     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
 234     as in the second example below.
 235
 236     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
 237     the array elements determines the order of the items in the batch.
 238
 239     example:
 240         C<my $batch = C4::Labels::Batch->new(); # Creates and returns a new batch object>
 241
 242         C<my $batch = C4::Labels::Batch->new(items => $arrayref, branch_code => branch_code) #    Creates and returns a new batch object containing the items passed in
 243             with the branch code passed in.>
 244
 245     B<NOTE:> This batch is I<not> written to the database until C<$batch->save()> is invoked. You have been warned!
 246
 247 =head2 $batch->add_item(item_number => $item_number, branch_code => $branch_code)
 248
 249     Invoking the I<add_item> method will add the supplied item to the batch object.
 250
 251     example:
 252         $batch->add_item(item_number => $item_number, branch_code => $branch_code);
 253
 254 =head2 $batch->get_attr($attribute)
 255
 256     Invoking the I<get_attr> method will return the requested attribute.
 257
 258     example:
 259         my @items = $batch->get_attr('items');
 260
 261 =head2 $batch->remove_item($item_number)
 262
 263     Invoking the I<remove_item> method will remove the supplied item number from the batch object.
 264
 265     example:
 266         $batch->remove_item($item_number);
 267
 268 =head2 C4::Labels::Batch->retrieve(batch_id => $batch_id)
 269
 270     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.
 271     Errors are logged to the Apache log.
 272
 273     examples:
 274
 275         my $batch = C4::Labels::Batch->retrieve(batch_id => 1); # Retrieves batch 1 and returns an object containing the record
 276
 277 =head2 delete()
 278
 279     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.
 280     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.
 281
 282     examples:
 283         my $exitstat = $batch->delete(); # to delete the record behind the $batch object
 284         my $exitstat = C4::Labels::Batch->delete(batch_id => 1); # to delete batch 1
 285
 286 =head2 remove_duplicates()
 287
 288     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
 289     success and -1 upon failure. Errors are logged to the Apache log.
 290     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.
 291
 292     examples:
 293         my $remove_count = $batch->remove_duplicates(); # to remove duplicates the record behind the $batch object
 294         my $remove_count = C4::Labels::Batch->remove_duplicates(batch_id => 1); # to remove duplicates in batch 1
 295
 296 =head1 AUTHOR
 297
 298 Chris Nighswonger <cnighswonger AT foundations DOT edu>
 299
 300 =head1 COPYRIGHT
 301
 302 Copyright 2009 Foundations Bible College.
 303
 304 =head1 LICENSE
 305
 306 This file is part of Koha.
 307
 308 Koha is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software
 309 Foundation; either version 2 of the License, or (at your option) any later version.
 310
 311 You should have received a copy of the GNU General Public License along with Koha; if not, write to the Free Software Foundation, Inc., 51 Franklin Street,
 312 Fifth Floor, Boston, MA 02110-1301 USA.
 313
 314 =head1 DISCLAIMER OF WARRANTY
 315
 316 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
 317 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 318
 319 =cut
 320