C4/External/BakerTaylor.pm

   1 package C4::External::BakerTaylor;
   2
   3 # Copyright (C) 2008 LibLime
   4 # <jmf at liblime dot com>
   5 #
   6 # This file is part of Koha.
   7 #
   8 # Koha is free software; you can redistribute it and/or modify it
   9 # under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # Koha is distributed in the hope that it will be useful, but
  14 # WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  20
  21 use XML::Simple;
  22 use LWP::Simple;
  23 use HTTP::Request::Common;
  24
  25 use C4::Context;
  26 use C4::Debug;
  27
  28 use Modern::Perl;
  29
  30 use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $VERSION);
  31
  32 BEGIN {
  33         require Exporter;
  34         @ISA = qw(Exporter);
  35     $VERSION = 3.07.00.049;
  36         @EXPORT_OK = qw(&availability &content_cafe &image_url &link_url &http_jacket_link);
  37         %EXPORT_TAGS = (all=>\@EXPORT_OK);
  38 }
  39
  40 # These variables are plack safe: they are initialized each time
  41 my ( $user, $pass, $agent, $image_url, $link_url );
  42
  43 sub _initialize {
  44         $user     = (@_ ? shift : C4::Context->preference('BakerTaylorUsername')    ) || ''; # LL17984
  45         $pass     = (@_ ? shift : C4::Context->preference('BakerTaylorPassword')    ) || ''; # CC82349
  46         $link_url = (@_ ? shift : C4::Context->preference('BakerTaylorBookstoreURL'));
  47         $image_url = "http://contentcafe2.btol.com/ContentCafe/Jacket.aspx?UserID=$user&Password=$pass&Options=Y&Return=T&Type=S&Value=";
  48         $agent = "Koha/$VERSION [en] (Linux)";
  49                         #"Mozilla/4.76 [en] (Win98; U)",        #  if for some reason you want to go stealth, you might prefer this
  50 }
  51
  52 sub image_url {
  53     _initialize();
  54         ($user and $pass) or return;
  55         my $isbn = (@_ ? shift : '');
  56         $isbn =~ s/(p|-)//g;    # sanitize
  57         return $image_url . $isbn;
  58 }
  59
  60 sub link_url {
  61     _initialize();
  62         my $isbn = (@_ ? shift : '');
  63         $isbn =~ s/(p|-)//g;    # sanitize
  64         $link_url or return;
  65         return $link_url . $isbn;
  66 }
  67
  68 sub content_cafe_url {
  69     _initialize();
  70         ($user and $pass) or return;
  71         my $isbn = (@_ ? shift : '');
  72         $isbn =~ s/(p|-)//g;    # sanitize
  73         return "http://contentcafe2.btol.com/ContentCafeClient/ContentCafe.aspx?UserID=$user&Password=$pass&Options=Y&ItemKey=$isbn";
  74 }
  75
  76 sub http_jacket_link {
  77     _initialize();
  78         my $isbn = shift or return;
  79         $isbn =~ s/(p|-)//g;    # sanitize
  80         my $image = availability($isbn);
  81         my $alt = "Buy this book";
  82         $image and $image = qq(<img class="btjacket" alt="$alt" src="$image" />);
  83         my $link = &link_url($isbn);
  84         unless ($link) {return $image || '';}
  85         return sprintf qq(<a class="btlink" href="%s">%s</a>),$link,($image||$alt);
  86 }
  87
  88 sub availability {
  89     _initialize();
  90         my $isbn = shift or return;
  91         ($user and $pass) or return;
  92         $isbn =~ s/(p|-)//g;    # sanitize
  93         my $url = "http://contentcafe2.btol.com/ContentCafe/InventoryAvailability.asmx/CheckInventory?UserID=$user&Password=$pass&Value=$isbn";
  94         $debug and warn __PACKAGE__ . " request:\n$url\n";
  95         my $content = get($url);
  96         $debug and print STDERR $content, "\n";
  97         warn "could not retrieve $url" unless $content;
  98         my $xmlsimple = XML::Simple->new();
  99         my $result = $xmlsimple->XMLin($content);
 100         if ($result->{Error}) {
 101                 warn "Error returned to " . __PACKAGE__ . " : " . $result->{Error};
 102         }
 103         my $avail = $result->{Availability};
 104         return ($avail and $avail !~ /^false$/i) ? &image_url($isbn) : 0;
 105 }
 106
 107 1;
 108
 109 __END__
 110
 111 =head1 NAME
 112
 113 C4::External::BakerTaylor
 114
 115 =head1 DESCRIPTION
 116
 117 Functions for retrieving content from Baker and Taylor, inventory availability and "Content Cafe".
 118
 119 The settings for this module are controlled by System Preferences:
 120
 121 These can be overridden for testing purposes using the initialize function.
 122
 123 =head1 FUNCTIONS
 124
 125 =head2 availability($isbn);
 126
 127 $isbn is a isbn string
 128
 129 =head1 NOTES
 130
 131 A request with failed authentication might see this back from Baker + Taylor:
 132
 133  <?xml version="1.0" encoding="utf-8"?>
 134  <InventoryAvailability xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" DateTime="2008-03-07T22:01:25.6520429-05:00" xmlns="http://ContentCafe2.btol.com">
 135    <Key Type="Undefined">string</Key>
 136    <Availability>false</Availability>
 137    <Error>Invalid UserID</Error>
 138  </InventoryAvailability>
 139
 140 Such response will trigger a warning for each request (potentially many).  Point being, do not leave this module configured with incorrect username and password in production.
 141
 142 =head1 SEE ALSO
 143
 144 LWP::UserAgent
 145
 146 =head1 AUTHOR
 147
 148 Joe Atzberger
 149 atz AT liblime DOT com
 150
 151 =cut