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1<?php
2
3/**
4 * Syndetics Summaries content loader.
5 *
6 * PHP version 8
7 *
8 * Copyright (C) The University of Chicago 2017.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2,
12 * as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
22 *
23 * @category VuFind
24 * @package  Content
25 * @author   John Jung <jej@uchicago.edu>
26 * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
27 * @link     https://vufind.org/wiki/development Wiki
28 */
29
30namespace VuFind\Content\Summaries;
31
32/**
33 * Syndetics Summaries content loader.
34 *
35 * @category VuFind
36 * @package  Content
37 * @author   John Jung <jej@uchicago.edu>
38 * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
39 * @link     https://vufind.org/wiki/development Wiki
40 */
41class Syndetics extends \VuFind\Content\AbstractSyndetics
42{
43    /**
44     * List of data sources for author notes.
45     *
46     * @var array
47     */
48    protected $sourceList = [
49        'AVSUMMARY' => [
50            'title' => 'Summaries',
51            'file' => 'AVSUMMARY.XML',
52            'div' => '<div id="syn_avsummary"></div>',
53        ],
54        'SUMMARY' => [
55            'title' => 'Summaries',
56            'file' => 'SUMMARY.XML',
57            'div' => '<div id="syn_summary"></div>',
58        ],
59    ];
60
61    /**
62     * This method is responsible for connecting to Syndetics for summaries.
63     *
64     * It first queries the master url for the ISBN entry seeking a summary URL.
65     * If a summary URL is found, the script will then use HTTP request to
66     * retrieve summaries.
67     * Configuration:  Sources are processed in order - refer to $sourceList above.
68     *
69     * @param string           $key     API key
70     * @param \VuFindCode\ISBN $isbnObj ISBN object
71     *
72     * @throws \Exception
73     * @return array     Returns array with summary data.
74     * @author John Jung <jej@uchicago.edu>
75     */
76    public function loadByIsbn($key, \VuFindCode\ISBN $isbnObj)
77    {
78        // Initialize return value:
79        $summaries = [];
80
81        // Find out if there are any summaries
82        $isbn = $this->getIsbn10($isbnObj);
83        $url = $this->getIsbnUrl($isbn, $key);
84        $result = $this->getHttpClient($url)->send();
85        if (!$result->isSuccess()) {
86            return $summaries;
87        }
88
89        // Test XML Response
90        if (!($xmldoc = $this->xmlToDOMDocument($result->getBody()))) {
91            throw new \Exception('Invalid XML');
92        }
93
94        foreach ($this->sourceList as $source => $sourceInfo) {
95            $nodes = $xmldoc->getElementsByTagName($source);
96            if ($nodes->length) {
97                // Load summary
98                $url = $this->getIsbnUrl($isbn, $key, $sourceInfo['file']);
99                $result2 = $this->getHttpClient($url)->send();
100                if (!$result2->isSuccess()) {
101                    continue;
102                }
103
104                // Test XML Response
105                $xmldoc2 = $this->xmlToDOMDocument($result2->getBody());
106                if (!$xmldoc2) {
107                    throw new \Exception('Invalid XML');
108                }
109
110                // If we have syndetics plus, we don't actually want the content
111                // we'll just stick in the relevant div
112                if ($this->usePlus) {
113                    $summaries[] = $sourceInfo['div'];
114                } else {
115                    // Get the marc field for summaries. (520)
116                    $nodes = $xmldoc2->GetElementsbyTagName('Fld520');
117                    foreach ($nodes as $node) {
118                        $summaries[] = preg_replace(
119                            '/<a>|<a [^>]*>|<\/a>/',
120                            '',
121                            html_entity_decode($node->nodeValue)
122                        );
123                    }
124                }
125            }
126        }
127
128        return $summaries;
129    }
130}