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1 | <?php |
2 | |
3 | /** |
4 | * Third-party content loader |
5 | * |
6 | * PHP version 8 |
7 | * |
8 | * Copyright (C) Villanova University 2010. |
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 Demian Katz <demian.katz@villanova.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 | |
30 | namespace VuFind\Content; |
31 | |
32 | use VuFind\ServiceManager\AbstractPluginManager; |
33 | |
34 | /** |
35 | * Third-party content loader |
36 | * |
37 | * @category VuFind |
38 | * @package Content |
39 | * @author Demian Katz <demian.katz@villanova.edu> |
40 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
41 | * @link https://vufind.org/wiki/development Wiki |
42 | */ |
43 | class Loader |
44 | { |
45 | /** |
46 | * Plug-in loader |
47 | * |
48 | * @var AbstractPluginManager |
49 | */ |
50 | protected $loader; |
51 | |
52 | /** |
53 | * Provider information |
54 | * |
55 | * @var string |
56 | */ |
57 | protected $providers; |
58 | |
59 | /** |
60 | * Constructor |
61 | * |
62 | * @param AbstractPluginManager $loader Plugin loader for content |
63 | * @param string $providers Provider information |
64 | */ |
65 | public function __construct(AbstractPluginManager $loader, $providers = '') |
66 | { |
67 | $this->loader = $loader; |
68 | $this->providers = $providers; |
69 | } |
70 | |
71 | /** |
72 | * Build an ISBN object; return false if value is invalid. |
73 | * |
74 | * @param string $isbn ISBN |
75 | * |
76 | * @return \VuFindCode\ISBN|bool |
77 | */ |
78 | protected function getIsbnObject($isbn) |
79 | { |
80 | // We can't proceed without an ISBN: |
81 | return (empty($isbn)) |
82 | ? false : new \VuFindCode\ISBN($isbn); |
83 | } |
84 | |
85 | /** |
86 | * Retrieve results for the providers specified. |
87 | * |
88 | * @param string $isbn ISBN to use for lookup |
89 | * |
90 | * @return array |
91 | */ |
92 | public function loadByIsbn($isbn) |
93 | { |
94 | $results = []; |
95 | if (!($isbnObj = $this->getIsbnObject($isbn))) { |
96 | return $results; |
97 | } |
98 | |
99 | // Fetch from provider |
100 | $providers = explode(',', $this->providers); |
101 | foreach ($providers as $provider) { |
102 | $parts = explode(':', trim($provider)); |
103 | $provider = $parts[0]; |
104 | if (!empty($provider)) { |
105 | $key = $parts[1] ?? ''; |
106 | try { |
107 | $plugin = $this->loader->get($provider); |
108 | $results[$provider] = $plugin->loadByIsbn($key, $isbnObj); |
109 | |
110 | // If the current provider had no valid data, store nothing: |
111 | if (empty($results[$provider])) { |
112 | unset($results[$provider]); |
113 | } |
114 | } catch (\Exception $e) { |
115 | // Ignore exceptions: |
116 | error_log($e->getMessage()); |
117 | unset($results[$provider]); |
118 | } |
119 | } |
120 | } |
121 | |
122 | return $results; |
123 | } |
124 | } |