Open-ILS/src/perlmods/OpenILS/Utils/Fieldmapper.pm

   1 package Fieldmapper;
   2 use JSON;
   3 use Data::Dumper;
   4 use OpenILS::Application::Storage::CDBI::actor;
   5 use OpenILS::Application::Storage::CDBI::biblio;
   6 use OpenILS::Application::Storage::CDBI::config;
   7 use OpenILS::Application::Storage::CDBI::metabib;
   8
   9 use vars qw/$fieldmap @class_name_list $VERSION/;
  10
  11 _init();
  12
  13 #
  14 # To dump the Javascript version of the fieldmapper struct use the command:
  15 #
  16 #       PERL5LIB=~/cvs/ILS/OpenSRF/src/perlmods/:~/cvs/ILS/Open-ILS/src/perlmods/ GEN_JS=1 perl -MOpenILS::Utils::Fieldmapper -e 'print "\n";'
  17 #
  18 # ... adjusted for your CVS sandbox, of course.
  19 #
  20
  21 sub _init {
  22         return if (defined $fieldmap);
  23
  24         $fieldmap =
  25         {
  26                 'Fieldmapper::actor::user'                      => { hint => 'au'   },
  27                 'Fieldmapper::actor::org_unit'                  => { hint => 'aou'  },
  28                 'Fieldmapper::actor::org_unit_type'             => { hint => 'aout' },
  29                 'Fieldmapper::biblio::record_node'              => { hint => 'brn'  },
  30                 'Fieldmapper::biblio::record_entry'             => { hint => 'bre'  },
  31                 'Fieldmapper::config::bib_source'               => { hint => 'cbs'  },
  32                 'Fieldmapper::config::metabib_field'            => { hint => 'cmf'  },
  33                 'Fieldmapper::metabib::metarecord'              => { hint => 'mmr'  },
  34                 'Fieldmapper::metabib::title_field_entry'       => { hint => 'mmr'  },
  35                 'Fieldmapper::metabib::author_field_entry'      => { hint => 'mmr'  },
  36                 'Fieldmapper::metabib::subject_field_entry'     => { hint => 'mmr'  },
  37                 'Fieldmapper::metabib::keyword_field_entry'     => { hint => 'mmr'  },
  38                 'Fieldmapper::metabib::full_rec'                => { hint => 'mmr'  },
  39         };
  40
  41         #-------------------------------------------------------------------------------
  42         # Now comes the evil!  Generate classes
  43
  44         for my $pkg ( keys %$fieldmap ) {
  45                 (my $cdbi = $pkg) =~ s/^Fieldmapper:://o;
  46
  47                 eval <<"                PERL";
  48                         package $pkg;
  49                         use base 'Fieldmapper';
  50                 PERL
  51
  52                 push @class_name_list, $pkg;
  53
  54                 $$fieldmapp{$pkg}{cdbi} = $cdbi;
  55
  56                 my $pos = 0;
  57                 for my $vfield ( qw/isnew ischanged isdeleted/ ) {
  58                         $$fieldmap{$pkg}{fields}{$vfield} = { position => $pos, virtual => 1 };
  59                         $pos++;
  60                 }
  61
  62                 for my $col ( $cdbi->columns('All') ) {
  63                         $$fieldmap{$pkg}{fields}{$col} = { position => $pos, virtual => 0 };
  64                         $pos++;
  65                 }
  66
  67                 JSON->register_class_hint(
  68                         hint => $pkg->json_hint,
  69                         name => $pkg,
  70                         type => 'array',
  71                 );
  72
  73         }
  74
  75         print Fieldmapper->javascript() if ($ENV{GEN_JS});
  76 }
  77
  78 sub new {
  79         my $self = shift;
  80         my $value = shift;
  81         $value = [] unless (defined $value);
  82         return bless $value => $self->class_name;
  83 }
  84
  85 sub javascript {
  86         my $class_name = shift;
  87         return 'var fieldmap = ' . JSON->perl2JSON($fieldmap) . ';'
  88 }
  89
  90 sub DESTROY {}
  91
  92 sub AUTOLOAD {
  93         my $obj = shift;
  94         my $value = shift;
  95         (my $field = $AUTOLOAD) =~ s/^.*://o;
  96         my $class_name = $obj->class_name;
  97
  98         die "No field by the name $field in $class_name!"
  99                 unless (exists $$fieldmap{$class_name}{fields}{$field});
 100
 101         my $pos = $$fieldmap{$class_name}{fields}{$field}{position};
 102
 103         {       no strict 'subs';
 104                 *{$obj->class_name."::$field"} = sub {
 105                         my $self = shift;
 106                         my $new_val = shift;
 107                         $self->[$pos] = $new_val if (defined $new_val);
 108                         return $self->[$pos];
 109                 };
 110         }
 111
 112         return $obj->$field($value);
 113 }
 114
 115 sub class_name {
 116         my $class_name = shift;
 117         return ref($class_name) || $class_name;
 118 }
 119
 120 sub real_fields {
 121         my $self = shift;
 122         my $class_name = $self->class_name;
 123         my $fields = $$fieldmap{$class_name}{fields};
 124
 125         my @f = grep {
 126                         !$$fields{$_}{virtual}
 127                 } sort {$$fields{$a}{position} <=> $$fields{$b}{position}} keys %$fields;
 128
 129         return @f;
 130 }
 131
 132 sub api_level {
 133         my $self = shift;
 134         return $fieldmap->{$self->class_name}->{api_level};
 135 }
 136
 137 sub api_level {
 138         my $self = shift;
 139         return $fieldmap->{$self->class_name}->{api_level};
 140 }
 141
 142 sub json_hint {
 143         my $self = shift;
 144         return $fieldmap->{$self->class_name}->{hint};
 145 }
 146
 147
 148 1;