xref: /dokuwiki/inc/Extension/PluginTrait.php (revision 2e43b79909f3bc04928779d886f68c1242b5d436) 
1<?php
2
3namespace dokuwiki\Extension;
4
5use dokuwiki\Logger;
6
7/**
8 * Provides standard DokuWiki plugin behaviour
9 */
10trait PluginTrait
11{
12    protected $localised = false;        // set to true by setupLocale() after loading language dependent strings
13    protected $lang = [];           // array to hold language dependent strings, best accessed via ->getLang()
14    protected $configloaded = false;     // set to true by loadConfig() after loading plugin configuration variables
15    protected $conf = [];           // array to hold plugin settings, best accessed via ->getConf()
16
17    /**
18     * @see PluginInterface::getInfo()
19     */
20    public function getInfo()
21    {
22        $class = $this::class;
23        $parts = sexplode('_', $class, 3);
24        $ext = $parts[2];
25
26        if (empty($ext)) {
27            throw new \RuntimeException('Class does not follow the plugin naming convention');
28        }
29
30        // class like action_plugin_myplugin_ajax belongs to plugin 'myplugin'
31        $ext = strtok($ext, '_');
32
33        $base = [
34            'base' => $ext,
35            'author' => 'Unknown',
36            'email' => 'unknown@example.com',
37            'date' => '0000-00-00',
38            'name' => $ext . ' plugin',
39            'desc' => 'Unknown purpose - bad plugin.info.txt',
40            'url' => 'https://www.dokuwiki.org/plugins/' . $ext,
41        ];
42
43        $file = DOKU_PLUGIN . '/' . $ext . '/plugin.info.txt';
44        if (file_exists($file)) {
45            $raw = confToHash($file);
46
47            // check if all required fields are present
48            $msg = 'Extension %s does not provide a valid %s in %s';
49            foreach (array_keys($base) as $line) {
50                if (empty($raw[$line])) Logger::error(sprintf($msg, $ext, $line, $file));
51            }
52
53            return array_merge($base, $raw);
54        }
55
56        Logger::error(sprintf('Extension %s does not provide a plugin.info.txt in %s', $ext, $file));
57        return $base;
58    }
59
60    /**
61     * @see PluginInterface::isSingleton()
62     */
63    public function isSingleton()
64    {
65        return true;
66    }
67
68    /**
69     * @see PluginInterface::loadHelper()
70     */
71    public function loadHelper($name, $msg = true)
72    {
73        $obj = plugin_load('helper', $name);
74        if (is_null($obj) && $msg) msg("Helper plugin $name is not available or invalid.", -1);
75        return $obj;
76    }
77
78    // region introspection methods
79
80    /**
81     * @see PluginInterface::getPluginType()
82     */
83    public function getPluginType()
84    {
85        [$t] = explode('_', $this::class, 2);
86        return $t;
87    }
88
89    /**
90     * @see PluginInterface::getPluginName()
91     */
92    public function getPluginName()
93    {
94        [/* t */, /* p */, $n] = sexplode('_', $this::class, 4, '');
95        return $n;
96    }
97
98    /**
99     * @see PluginInterface::getPluginComponent()
100     */
101    public function getPluginComponent()
102    {
103        [/* t */, /* p */, /* n */, $c] = sexplode('_', $this::class, 4, '');
104        return $c;
105    }
106
107    // endregion
108    // region localization methods
109
110    /**
111     * @see PluginInterface::getLang()
112     */
113    public function getLang($id)
114    {
115        if (!$this->localised) $this->setupLocale();
116
117        return ($this->lang[$id] ?? '');
118    }
119
120    /**
121     * @see PluginInterface::locale_xhtml()
122     */
123    public function locale_xhtml($id)
124    {
125        // plugin-bundled locale files are authored in DokuWiki syntax; render
126        // them as 'dw' regardless of the configured wiki syntax preference
127        return p_cached_output($this->localFN($id), 'xhtml', '', 'dw');
128    }
129
130    /**
131     * @see PluginInterface::localFN()
132     */
133    public function localFN($id, $ext = 'txt')
134    {
135        global $conf;
136        $plugin = $this->getPluginName();
137        $file = DOKU_CONF . 'plugin_lang/' . $plugin . '/' . $conf['lang'] . '/' . $id . '.' . $ext;
138        if (!file_exists($file)) {
139            $file = DOKU_PLUGIN . $plugin . '/lang/' . $conf['lang'] . '/' . $id . '.' . $ext;
140            if (!file_exists($file)) {
141                //fall back to english
142                $file = DOKU_PLUGIN . $plugin . '/lang/en/' . $id . '.' . $ext;
143            }
144        }
145        return $file;
146    }
147
148    /**
149     * @see PluginInterface::setupLocale()
150     */
151    public function setupLocale()
152    {
153        if ($this->localised) return;
154
155        global $conf, $config_cascade; // definitely don't invoke "global $lang"
156        $path = DOKU_PLUGIN . $this->getPluginName() . '/lang/';
157
158        $lang = [];
159
160        // don't include once, in case several plugin components require the same language file
161        @include($path . 'en/lang.php');
162        foreach ($config_cascade['lang']['plugin'] as $config_file) {
163            if (file_exists($config_file . $this->getPluginName() . '/en/lang.php')) {
164                include($config_file . $this->getPluginName() . '/en/lang.php');
165            }
166        }
167
168        if ($conf['lang'] != 'en') {
169            @include($path . $conf['lang'] . '/lang.php');
170            foreach ($config_cascade['lang']['plugin'] as $config_file) {
171                if (file_exists($config_file . $this->getPluginName() . '/' . $conf['lang'] . '/lang.php')) {
172                    include($config_file . $this->getPluginName() . '/' . $conf['lang'] . '/lang.php');
173                }
174            }
175        }
176
177        $this->lang = $lang;
178        $this->localised = true;
179    }
180
181    // endregion
182    // region configuration methods
183
184    /**
185     * @see PluginInterface::getConf()
186     */
187    public function getConf($setting, $notset = false)
188    {
189
190        if (!$this->configloaded) {
191            $this->loadConfig();
192        }
193
194        if (isset($this->conf[$setting])) {
195            return $this->conf[$setting];
196        } else {
197            return $notset;
198        }
199    }
200
201    /**
202     * @see PluginInterface::loadConfig()
203     */
204    public function loadConfig()
205    {
206        global $conf;
207
208        $defaults = $this->readDefaultSettings();
209        $plugin = $this->getPluginName();
210
211        foreach ($defaults as $key => $value) {
212            if (isset($conf['plugin'][$plugin][$key])) continue;
213            $conf['plugin'][$plugin][$key] = $value;
214        }
215
216        $this->configloaded = true;
217        $this->conf =& $conf['plugin'][$plugin];
218    }
219
220    /**
221     * read the plugin's default configuration settings from conf/default.php
222     * this function is automatically called through getConf()
223     *
224     * @return    array    setting => value
225     */
226    protected function readDefaultSettings()
227    {
228
229        $path = DOKU_PLUGIN . $this->getPluginName() . '/conf/';
230        $conf = [];
231
232        if (file_exists($path . 'default.php')) {
233            include($path . 'default.php');
234        }
235
236        return $conf;
237    }
238
239    // endregion
240    // region output methods
241
242    /**
243     * @see PluginInterface::email()
244     */
245    public function email($email, $name = '', $class = '', $more = '')
246    {
247        if (!$email) return $name;
248        $email = obfuscate($email);
249        if (!$name) $name = $email;
250        $class = "class='" . ($class ?: 'mail') . "'";
251        return "<a href='mailto:$email' $class title='$email' $more>$name</a>";
252    }
253
254    /**
255     * @see PluginInterface::external_link()
256     */
257    public function external_link($link, $title = '', $class = '', $target = '', $more = '')
258    {
259        global $conf;
260
261        $link = htmlentities($link);
262        if (!$title) $title = $link;
263        if (!$target) $target = $conf['target']['extern'];
264        if ($conf['relnofollow']) $more .= ' rel="nofollow"';
265
266        if ($class) $class = " class='$class'";
267        if ($target) $target = " target='$target'";
268        if ($more) $more = " " . trim($more);
269
270        return "<a href='$link'$class$target$more>$title</a>";
271    }
272
273    /**
274     * @see PluginInterface::render_text()
275     */
276    public function render_text($text, $format = 'xhtml', $syntax = 'dw')
277    {
278        return p_render($format, p_get_instructions($text, $syntax), $info);
279    }
280
281    // endregion
282}
283