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1 | <?php |
2 | |
3 | /** |
4 | * Trait to add facet limiting settings to a Params object. |
5 | * |
6 | * PHP version 8 |
7 | * |
8 | * Copyright (C) Villanova University 2018. |
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 Search |
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:plugins:record_drivers Wiki |
28 | */ |
29 | |
30 | namespace VuFind\Search\Params; |
31 | |
32 | use Laminas\Config\Config; |
33 | |
34 | use function in_array; |
35 | |
36 | /** |
37 | * Trait to add facet limiting settings to a Params object. |
38 | * |
39 | * @category VuFind |
40 | * @package Search |
41 | * @author Demian Katz <demian.katz@villanova.edu> |
42 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
43 | * @link https://vufind.org/wiki/development:plugins:record_drivers Wiki |
44 | */ |
45 | trait FacetLimitTrait |
46 | { |
47 | /** |
48 | * Default facet result limit |
49 | * |
50 | * @var int |
51 | */ |
52 | protected $facetLimit = 30; |
53 | |
54 | /** |
55 | * Per-field facet result limit |
56 | * |
57 | * @var array |
58 | */ |
59 | protected $facetLimitByField = []; |
60 | |
61 | /** |
62 | * Hierarchical facet limit when facets are requested. |
63 | * |
64 | * -1 = unlimited |
65 | * |
66 | * @var int |
67 | */ |
68 | protected $hierarchicalFacetLimit = -1; |
69 | |
70 | /** |
71 | * Initialize facet limit from a Config object. |
72 | * |
73 | * @param Config $config Configuration |
74 | * |
75 | * @return void |
76 | */ |
77 | protected function initFacetLimitsFromConfig(Config $config = null) |
78 | { |
79 | if (is_numeric($config->facet_limit ?? null)) { |
80 | $this->setFacetLimit($config->facet_limit); |
81 | } |
82 | foreach ($config->facet_limit_by_field ?? [] as $k => $v) { |
83 | $this->facetLimitByField[$k] = $v; |
84 | } |
85 | } |
86 | |
87 | /** |
88 | * Set Facet Limit |
89 | * |
90 | * @param int $l the new limit value |
91 | * |
92 | * @return void |
93 | */ |
94 | public function setFacetLimit($l) |
95 | { |
96 | $this->facetLimit = $l; |
97 | } |
98 | |
99 | /** |
100 | * Set Facet Limit by Field |
101 | * |
102 | * @param array $new Associative array of $field name => $limit |
103 | * |
104 | * @return void |
105 | */ |
106 | public function setFacetLimitByField(array $new) |
107 | { |
108 | $this->facetLimitByField = $new; |
109 | } |
110 | |
111 | /** |
112 | * Get current limit for hierarchical facets |
113 | * |
114 | * @return int |
115 | */ |
116 | public function getHierarchicalFacetLimit() |
117 | { |
118 | return $this->hierarchicalFacetLimit; |
119 | } |
120 | |
121 | /** |
122 | * Set limit for hierarchical facets |
123 | * |
124 | * @param int $limit New limit |
125 | * |
126 | * @return void |
127 | */ |
128 | public function setHierarchicalFacetLimit($limit) |
129 | { |
130 | $this->hierarchicalFacetLimit = $limit; |
131 | } |
132 | |
133 | /** |
134 | * Get the facet limit for the specified field. |
135 | * |
136 | * @param string $field Field to look up |
137 | * |
138 | * @return int |
139 | */ |
140 | protected function getFacetLimitForField($field) |
141 | { |
142 | $limit = $this->facetLimitByField[$field] ?? $this->facetLimit; |
143 | |
144 | // Check for a different limit for hierarchical facets: |
145 | if ($limit !== $this->hierarchicalFacetLimit) { |
146 | $hierarchicalFacets = $this->getOptions()->getHierarchicalFacets(); |
147 | if (in_array($field, $hierarchicalFacets)) { |
148 | $limit = $this->hierarchicalFacetLimit; |
149 | } |
150 | } |
151 | |
152 | return $limit; |
153 | } |
154 | } |