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1 | <?php |
2 | |
3 | /** |
4 | * Abstract base class for channel providers relying on the ILS. |
5 | * |
6 | * PHP version 8 |
7 | * |
8 | * Copyright (C) Villanova University 2018, 2022. |
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 Channels |
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\ChannelProvider; |
31 | |
32 | use VuFind\I18n\Translator\TranslatorAwareInterface; |
33 | use VuFind\RecordDriver\AbstractBase as RecordDriver; |
34 | use VuFind\Search\Base\Results; |
35 | use VuFindSearch\Command\RetrieveBatchCommand; |
36 | |
37 | use function count; |
38 | |
39 | /** |
40 | * Abstract base class for channel providers relying on the ILS. |
41 | * |
42 | * @category VuFind |
43 | * @package Channels |
44 | * @author Demian Katz <demian.katz@villanova.edu> |
45 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
46 | * @link https://vufind.org/wiki/development Wiki |
47 | */ |
48 | abstract class AbstractILSChannelProvider extends AbstractChannelProvider implements TranslatorAwareInterface |
49 | { |
50 | use \VuFind\I18n\Translator\TranslatorAwareTrait; |
51 | |
52 | /** |
53 | * Number of results to include in each channel. |
54 | * |
55 | * @var int |
56 | */ |
57 | protected $channelSize; |
58 | |
59 | /** |
60 | * Channel title (will be run through translator). |
61 | * |
62 | * @var string |
63 | */ |
64 | protected $channelTitle = 'Please set $channelTitle property!'; |
65 | |
66 | /** |
67 | * Maximum age (in days) of results to retrieve. |
68 | * |
69 | * @var int |
70 | */ |
71 | protected $maxAge; |
72 | |
73 | /** |
74 | * ILS connection |
75 | * |
76 | * @var \VuFind\ILS\Connection |
77 | */ |
78 | protected $ils; |
79 | |
80 | /** |
81 | * Search service |
82 | * |
83 | * @var \VuFindSearch\Service |
84 | */ |
85 | protected $searchService; |
86 | |
87 | /** |
88 | * Constructor |
89 | * |
90 | * @param \VuFindSearch\Service $search Search service |
91 | * @param \VuFind\ILS\Connection $ils ILS connection |
92 | * @param array $options Settings (optional) |
93 | */ |
94 | public function __construct( |
95 | \VuFindSearch\Service $search, |
96 | \VuFind\ILS\Connection $ils, |
97 | array $options = [] |
98 | ) { |
99 | $this->searchService = $search; |
100 | $this->ils = $ils; |
101 | $this->setOptions($options); |
102 | } |
103 | |
104 | /** |
105 | * Set the options for the provider. |
106 | * |
107 | * @param array $options Options |
108 | * |
109 | * @return void |
110 | */ |
111 | public function setOptions(array $options) |
112 | { |
113 | $this->channelSize = $options['channelSize'] ?? 20; |
114 | $this->maxAge = $options['maxAge'] ?? 30; |
115 | } |
116 | |
117 | /** |
118 | * Return channel information derived from a record driver object. |
119 | * |
120 | * @param RecordDriver $driver Record driver |
121 | * @param string $channelToken Token identifying a single specific channel |
122 | * to load (if omitted, all channels will be loaded) -- not used in this provider |
123 | * |
124 | * @return array |
125 | * |
126 | * @SuppressWarnings(PHPMD.UnusedFormalParameter) |
127 | */ |
128 | public function getFromRecord(RecordDriver $driver, $channelToken = null) |
129 | { |
130 | return $this->getChannel(); |
131 | } |
132 | |
133 | /** |
134 | * Return channel information derived from a search results object. |
135 | * |
136 | * @param Results $results Search results |
137 | * @param string $channelToken Token identifying a single specific channel |
138 | * to load (if omitted, all channels will be loaded) -- not used in this provider |
139 | * |
140 | * @return array |
141 | * |
142 | * @SuppressWarnings(PHPMD.UnusedFormalParameter) |
143 | */ |
144 | public function getFromSearch(Results $results, $channelToken = null) |
145 | { |
146 | return $this->getChannel(); |
147 | } |
148 | |
149 | /** |
150 | * Retrieve data from the ILS. |
151 | * |
152 | * @return array |
153 | */ |
154 | abstract protected function getIlsResponse(); |
155 | |
156 | /** |
157 | * Given one element from the ILS function's response array, extract the |
158 | * ID value. |
159 | * |
160 | * @param array $response Response array |
161 | * |
162 | * @return string |
163 | */ |
164 | abstract protected function extractIdsFromResponse($response); |
165 | |
166 | /** |
167 | * Recently returned channel contents are always the same; this does not |
168 | * care about specific records or search parameters. |
169 | * |
170 | * @return array |
171 | */ |
172 | protected function getChannel() |
173 | { |
174 | // Use a callback to extract IDs from the arrays in the ILS return value: |
175 | $ids = array_map([$this, 'extractIdsFromResponse'], $this->getIlsResponse()); |
176 | // No IDs means no response! |
177 | if (empty($ids)) { |
178 | return []; |
179 | } |
180 | // Look up the record drivers for the recently returned IDs: |
181 | $command = new RetrieveBatchCommand('Solr', $ids); |
182 | $records = $this->searchService->invoke($command)->getResult()->getRecords(); |
183 | // Build the return value: |
184 | $retVal = [ |
185 | 'title' => $this->translate($this->channelTitle), |
186 | 'providerId' => $this->providerId, |
187 | 'contents' => $this->summarizeRecordDrivers($records), |
188 | ]; |
189 | return (count($retVal['contents']) > 0) ? [$retVal] : []; |
190 | } |
191 | } |