C4/Output/JSONStream.pm

   1 package C4::Output::JSONStream;
   2 #
   3 # Copyright 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 =head1 NAME
  21
  22 C4::Output::JSONStream - progressively build JSON data
  23
  24 =head1 SYNOPSIS
  25
  26 my $json = new C4::Output::JSONStream;
  27
  28 $json->param( issues => [ 'yes!', 'please', 'no', { emphasis = 'NO' } ] );
  29 $json->param( stuff => 'realia' );
  30
  31 print $json->output;
  32
  33 =head1 DESCRIPTION
  34
  35 This module allows you to build JSON incrementally.
  36
  37 =cut
  38
  39 use strict;
  40 use warnings;
  41
  42 use JSON;
  43
  44 sub new {
  45     my $class = shift;
  46     my $self = {
  47         data => {},
  48         options => {}
  49     };
  50
  51     bless $self, $class;
  52
  53     return $self;
  54 }
  55
  56 sub param {
  57     my $self = shift;
  58
  59     if ( @_ % 2 != 0 ) {
  60         die 'param() received odd number of arguments (should be called with param => "value" pairs)';
  61     }
  62
  63     for ( my $i = 0; $i < $#_; $i += 2 ) {
  64         $self->{data}->{$_[$i]} = $_[$i + 1];
  65     }
  66 }
  67
  68 sub output {
  69     my $self = shift;
  70
  71     return to_json( $self->{data} );
  72 }
  73
  74 1;