xref: /webtrees/app/Module/AbstractModule.php (revision 3fa66c660869af2f4c92ef37e06997aa8a0f55e1) 
1<?php
2/**
3 * webtrees: online genealogy
4 * Copyright (C) 2019 webtrees development team
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16declare(strict_types=1);
17
18namespace Fisharebest\Webtrees\Module;
19
20use Fisharebest\Webtrees\Auth;
21use Fisharebest\Webtrees\Database;
22use Fisharebest\Webtrees\Tree;
23use Illuminate\Database\Capsule\Manager as DB;
24use Symfony\Component\HttpFoundation\Response;
25
26/**
27 * Class AbstractModule - common functions for blocks
28 */
29abstract class AbstractModule
30{
31    /** @var string The directory where the module is installed */
32    private $directory;
33
34    /** @var string[] A cached copy of the module settings */
35    private $settings;
36
37    /** @var string For custom modules - optional (recommended) version number */
38    const CUSTOM_VERSION = '';
39
40    /** @var string For custom modules - link for support, upgrades, etc. */
41    const CUSTOM_WEBSITE = '';
42
43    protected $layout = 'layouts/default';
44
45    /**
46     * Create a new module.
47     *
48     * @param string $directory Where is this module installed
49     */
50    public function __construct(string $directory)
51    {
52        $this->directory = $directory;
53    }
54
55    /**
56     * Get a block setting.
57     *
58     * @param int    $block_id
59     * @param string $setting_name
60     * @param string $default_value
61     *
62     * @return string
63     */
64    public function getBlockSetting(int $block_id, string $setting_name, string $default_value = ''): string
65    {
66        $setting_value = Database::prepare(
67            "SELECT setting_value FROM `##block_setting` WHERE block_id = :block_id AND setting_name = :setting_name"
68        )->execute([
69            'block_id'     => $block_id,
70            'setting_name' => $setting_name,
71        ])->fetchOne();
72
73        return $setting_value ?? $default_value;
74    }
75
76    /**
77     * Set a block setting.
78     *
79     * @param int    $block_id
80     * @param string $setting_name
81     * @param string $setting_value
82     *
83     * @return $this
84     */
85    public function setBlockSetting(int $block_id, string $setting_name, string $setting_value): self
86    {
87        Database::prepare(
88            "REPLACE INTO `##block_setting` (block_id, setting_name, setting_value) VALUES (:block_id, :setting_name, :setting_value)"
89        )->execute([
90            'block_id'      => $block_id,
91            'setting_name'  => $setting_name,
92            'setting_value' => $setting_value,
93        ]);
94
95        return $this;
96    }
97
98    /**
99     * What is the default access level for this module?
100     *
101     * Some modules are aimed at admins or managers, and are not generally shown to users.
102     *
103     * @return int
104     */
105    public function defaultAccessLevel(): int
106    {
107        // Returns one of: Auth::PRIV_HIDE, Auth::PRIV_PRIVATE, Auth::PRIV_USER, WT_PRIV_ADMIN
108        return Auth::PRIV_PRIVATE;
109    }
110
111    /**
112     * Provide a unique internal name for this module
113     *
114     * @return string
115     */
116    public function getName(): string
117    {
118        return basename($this->directory);
119    }
120
121    /**
122     * Load all the settings for the module into a cache.
123     *
124     * Since modules may have many settings, and will probably want to use
125     * lots of them, load them all at once and cache them.
126     *
127     * @return void
128     */
129    private function loadAllSettings()
130    {
131        if ($this->settings === null) {
132            $this->settings = DB::table('module_setting')
133                ->where('module_name', '=', $this->getName())
134                ->pluck('setting_value', 'setting_name')
135                ->all();
136        }
137    }
138
139    /**
140     * Get a module setting. Return a default if the setting is not set.
141     *
142     * @param string $setting_name
143     * @param string $default
144     *
145     * @return string
146     */
147    public function getPreference($setting_name, $default = '')
148    {
149        $this->loadAllSettings();
150
151        if (array_key_exists($setting_name, $this->settings)) {
152            return $this->settings[$setting_name];
153        }
154
155        return $default;
156    }
157
158    /**
159     * Set a module setting.
160     *
161     * Since module settings are NOT NULL, setting a value to NULL will cause
162     * it to be deleted.
163     *
164     * @param string $setting_name
165     * @param string $setting_value
166     *
167     * @return $this
168     */
169    public function setPreference($setting_name, $setting_value): self
170    {
171        $this->loadAllSettings();
172
173        if (!array_key_exists($setting_name, $this->settings)) {
174            Database::prepare(
175                "INSERT INTO `##module_setting` (module_name, setting_name, setting_value) VALUES (?, ?, ?)"
176            )->execute([
177                $this->getName(),
178                $setting_name,
179                $setting_value,
180            ]);
181
182            $this->settings[$setting_name] = $setting_value;
183        } elseif ($setting_value !== $this->getPreference($setting_name)) {
184            Database::prepare(
185                "UPDATE `##module_setting` SET setting_value = ? WHERE module_name = ? AND setting_name = ?"
186            )->execute([
187                $setting_value,
188                $this->getName(),
189                $setting_name,
190            ]);
191
192            $this->settings[$setting_name] = $setting_value;
193        }
194
195        return $this;
196    }
197
198    /**
199     * Get a the current access level for a module
200     *
201     * @param Tree   $tree
202     * @param string $component tab, block, menu, etc
203     *
204     * @return int
205     */
206    public function getAccessLevel(Tree $tree, $component)
207    {
208        $access_level = Database::prepare(
209            "SELECT access_level FROM `##module_privacy` WHERE gedcom_id = :gedcom_id AND module_name = :module_name AND component = :component"
210        )->execute([
211            'gedcom_id'   => $tree->id(),
212            'module_name' => $this->getName(),
213            'component'   => $component,
214        ])->fetchOne();
215
216        if ($access_level === null) {
217            return $this->defaultAccessLevel();
218        }
219
220        return (int) $access_level;
221    }
222
223    /**
224     * Create a response object from a view.
225     *
226     * @param string  $view_name
227     * @param mixed[] $view_data
228     * @param int     $status
229     *
230     * @return Response
231     */
232    protected function viewResponse($view_name, $view_data, $status = Response::HTTP_OK): Response
233    {
234        // Make the view's data available to the layout.
235        $layout_data = $view_data;
236
237        // Render the view
238        $layout_data['content'] = view($view_name, $view_data);
239
240        // Insert the view into the layout
241        $html = view($this->layout, $layout_data);
242
243        return new Response($html, $status);
244    }
245}
246