xref: /plugin/autotranslation/action.php (revision 43ffc77d80920449e2d2a483e8fdf55832b51a25) 
1<?php
2/**
3 * Translation Plugin: Simple multilanguage plugin
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 * @author     Guy Brand <gb@isis.u-strasbg.fr>
8 */
9
10// must be run within Dokuwiki
11if(!defined('DOKU_INC')) die();
12
13if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN', DOKU_INC . 'lib/plugins/');
14require_once(DOKU_PLUGIN . 'action.php');
15
16class action_plugin_translation extends DokuWiki_Action_Plugin {
17
18    /**
19     * for th helper plugin
20     * @var helper_plugin_translation
21     */
22    var $hlp = null;
23
24    var $locale;
25
26    /**
27     * Constructor. Load helper plugin
28     */
29    function action_plugin_translation() {
30        $this->hlp = plugin_load('helper', 'translation');
31    }
32
33    /**
34     * Registe the events
35     */
36    function register(Doku_Event_Handler $controller) {
37        // should the lang be applied to UI?
38        $scriptName = basename($_SERVER['PHP_SELF']);
39
40        if($this->getConf('translateui')) {
41            switch($scriptName) {
42                case 'js.php':
43                    $controller->register_hook('INIT_LANG_LOAD', 'BEFORE', $this, 'translation_js');
44                    $controller->register_hook('JS_CACHE_USE', 'BEFORE', $this, 'translation_jscache');
45                    break;
46
47                case 'ajax.php':
48                    $controller->register_hook('INIT_LANG_LOAD', 'BEFORE', $this, 'translate_media_manager');
49                    break;
50
51                case 'mediamanager.php':
52                    $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', $this, 'setJsCacheKey');
53                    break;
54
55                default:
56                    $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', $this, 'setJsCacheKey');
57            }
58        }
59
60        if($scriptName !== 'js.php' && $scriptName !== 'ajax.php') {
61            $controller->register_hook('DOKUWIKI_STARTED', 'BEFORE', $this, 'translation_hook');
62            $controller->register_hook('MEDIAMANAGER_STARTED', 'BEFORE', $this, 'translation_hook');
63        }
64
65        $controller->register_hook('SEARCH_QUERY_PAGELOOKUP', 'AFTER', $this, 'translation_search');
66        $controller->register_hook('COMMON_PAGETPL_LOAD', 'AFTER', $this, 'page_template_replacement');
67    }
68
69    /**
70     * Hook Callback. Make current language available as page template placeholder and handle
71     * original language copying
72     *
73     * @param $event
74     * @param $args
75     */
76    function page_template_replacement(&$event, $args) {
77        global $ID;
78
79        // load orginal content as template?
80        if($this->getConf('copytrans') && $this->hlp->istranslatable($ID, false)) {
81            // look for existing translations
82            $translations = $this->hlp->getAvailableTranslations($ID);
83            if($translations) {
84                // find original language (might've been provided via parameter or use first translation)
85                $orig = (string) $_REQUEST['fromlang'];
86                if(!$orig) $orig = array_shift(array_keys($translations));
87
88                // load file
89                $origfile = $translations[$orig];
90                $event->data['tpl'] = io_readFile(wikiFN($origfile));
91
92                // prefix with warning
93                $warn = io_readFile($this->localFN('totranslate'));
94                if($warn) $warn .= "\n\n";
95                $event->data['tpl'] = $warn . $event->data['tpl'];
96
97                // show user a choice of translations if any
98                if(count($translations) > 1) {
99                    $links = array();
100                    foreach($translations as $t => $l) {
101                        $links[] = '<a href="' . wl($ID, array('do' => 'edit', 'fromlang' => $t)) . '">' . $this->hlp->getLocalName($t) . '</a>';
102                    }
103
104                    msg(
105                        sprintf(
106                            $this->getLang('transloaded'),
107                            $this->hlp->getLocalName($orig),
108                            join(', ', $links)
109                        )
110                    );
111                }
112
113            }
114        }
115
116        // apply placeholders
117        $event->data['tpl'] = str_replace('@LANG@', $this->hlp->realLC(''), $event->data['tpl']);
118        $event->data['tpl'] = str_replace('@TRANS@', $this->hlp->getLangPart($ID), $event->data['tpl']);
119    }
120
121    /**
122     * Hook Callback. Load correct translation when loading JavaScript
123     *
124     * @param $event
125     * @param $args
126     */
127    function translation_js(&$event, $args) {
128        global $conf;
129        if(!isset($_GET['lang'])) return;
130        if(!in_array($_GET['lang'], $this->hlp->trans)) return;
131        $lang = $_GET['lang'];
132        $event->data = $lang;
133        $conf['lang'] = $lang;
134    }
135
136    /**
137     * Hook Callback. Pass language code to JavaScript dispatcher
138     *
139     * @param $event
140     * @param $args
141     * @return bool
142     */
143    function setJsCacheKey(&$event, $args) {
144        if(!isset($this->locale)) return false;
145        $count = count($event->data['script']);
146        for($i = 0; $i < $count; $i++) {
147            if(!empty($event->data['script'][$i]['src']) && strpos($event->data['script'][$i]['src'], '/lib/exe/js.php') !== false) {
148                $event->data['script'][$i]['src'] .= '&lang=' . hsc($this->locale);
149            }
150        }
151
152        return false;
153    }
154
155    /**
156     * Hook Callback. Make sure the JavaScript is translation dependent
157     *
158     * @param $event
159     * @param $args
160     */
161    function translation_jscache(&$event, $args) {
162        if(!isset($_GET['lang'])) return;
163        if(!in_array($_GET['lang'], $this->hlp->trans)) return;
164
165        $lang = $_GET['lang'];
166        // reuse the constructor to reinitialize the cache key
167        $event->data->cache(
168            $event->data->key . $lang,
169            $event->data->ext
170        );
171    }
172
173    /**
174     * Hook Callback. Translate the AJAX loaded media manager
175     *
176     * @param $event
177     * @param $args
178     */
179    function translate_media_manager(&$event, $args) {
180        global $conf;
181        if(isset($_REQUEST['ID'])) {
182            $id = getID();
183            $lc = $this->hlp->getLangPart($id);
184        } elseif(isset($_SESSION[DOKU_COOKIE]['translationlc'])) {
185            $lc = $_SESSION[DOKU_COOKIE]['translationlc'];
186        } else {
187            return;
188        }
189        if(!$lc) return;
190
191        $conf['lang'] = $lc;
192        $event->data = $lc;
193    }
194
195    /**
196     * Hook Callback. Change the UI language in foreign language namespaces
197     */
198    function translation_hook(&$event, $args) {
199        global $ID;
200        global $lang;
201        global $conf;
202        global $ACT;
203        // redirect away from start page?
204        if($this->conf['redirectstart'] && $ID == $conf['start'] && $ACT == 'show') {
205            $lc = $this->hlp->getBrowserLang();
206            if(!$lc) $lc = $conf['lang'];
207            $this->_redirect($lc.':'.$conf['start']);
208            exit;
209        }
210
211        // Check if we can redirect
212        if($this->getConf('redirectlocalized')){
213            $this->translation_redirect_localized();
214        }
215
216        // check if we are in a foreign language namespace
217        $lc = $this->hlp->getLangPart($ID);
218
219        // store language in session (for page related views only)
220        if(in_array($ACT, array('show', 'recent', 'diff', 'edit', 'preview', 'source', 'subscribe'))) {
221            $_SESSION[DOKU_COOKIE]['translationlc'] = $lc;
222        }
223        if(!$lc) $lc = $_SESSION[DOKU_COOKIE]['translationlc'];
224        if(!$lc) return;
225        $this->locale = $lc;
226
227        if(!$this->getConf('translateui')) {
228            return true;
229        }
230
231        if(file_exists(DOKU_INC . 'inc/lang/' . $lc . '/lang.php')) {
232            require(DOKU_INC . 'inc/lang/' . $lc . '/lang.php');
233        }
234        $conf['lang_before_translation'] = $conf['lang']; //store for later access in syntax plugin
235        $conf['lang'] = $lc;
236
237        return true;
238    }
239
240    /**
241     * Hook Callback.  Resort page match results so that results are ordered by translation, having the
242     * default language first
243     */
244    function translation_search(&$event, $args) {
245
246        if($event->data['has_titles']) {
247            // sort into translation slots
248            $res = array();
249            foreach($event->result as $r => $t) {
250                $tr = $this->hlp->getLangPart($r);
251                if(!is_array($res["x$tr"])) $res["x$tr"] = array();
252                $res["x$tr"][] = array($r, $t);
253            }
254            // sort by translations
255            ksort($res);
256            // combine
257            $event->result = array();
258            foreach($res as $r) {
259                foreach($r as $l) {
260                    $event->result[$l[0]] = $l[1];
261                }
262            }
263        } else {
264            # legacy support for old DokuWiki hooks
265
266            // sort into translation slots
267            $res = array();
268            foreach($event->result as $r) {
269                $tr = $this->hlp->getLangPart($r);
270                if(!is_array($res["x$tr"])) $res["x$tr"] = array();
271                $res["x$tr"][] = $r;
272            }
273            // sort by translations
274            ksort($res);
275            // combine
276            $event->result = array();
277            foreach($res as $r) {
278                $event->result = array_merge($event->result, $r);
279            }
280        }
281    }
282
283    /**
284     * Redirects to the localized version of the page when showing and browser says so and translation was explicitly requested
285     **/
286    function translation_redirect_localized() {
287        global $ID;
288        global $conf;
289        global $ACT;
290
291        // redirect to localized page?
292        if( $ACT != 'show' ) { return; }
293
294        $override = isset($_REQUEST['tns']); // override enabled - comes from the bottom bar.
295        $lang = !empty($conf['lang_before_translation']) ? $conf['lang_before_translation'] : $conf['lang']; // Check for original language
296
297        // get current page language - if empty then default;
298        $currentSessionLanguage = $_SESSION[DOKU_COOKIE]['translationcur'];
299        $pageLang = $this->hlp->getLangPart($ID);
300
301        if ( empty($pageLang) ) {
302            $pageLang = $lang;
303        }
304
305        // If both match, we're fine.
306        if ( $currentSessionLanguage == $pageLang ) {
307            return;
308        }
309
310        // check current translation
311        if ( empty( $currentSessionLanguage ) && !$override ) {
312
313            // If not set - we must just have entered - set the browser language
314            $currentSessionLanguage = $this->hlp->getBrowserLang();
315
316            // if no browser Language set, take entered namespace language - empty for default.
317            if ( !$currentSessionLanguage ) {
318                $currentSessionLanguage = $pageLang;
319            }
320
321            // Set new Language
322            $_SESSION[DOKU_COOKIE]['translationcur'] = $currentSessionLanguage;
323
324            // Write Language back
325            $pageLang = $currentSessionLanguage;
326        }
327
328
329        if ( $override && $pageLang != $currentSessionLanguage ) {
330            // Set new Language
331            $currentSessionLanguage = $pageLang;
332            $_SESSION[DOKU_COOKIE]['translationcur'] = $currentSessionLanguage;
333        } else if ( !$override ) {
334            // Write Language back
335            $pageLang = $currentSessionLanguage;
336        }
337
338        // If this is the default language, make empty
339        if ( $pageLang == $lang ) {
340            $pageLang = '';
341        }
342
343        // Generate new Page ID
344        list($newPage,$name) = $this->hlp->buildTransID($pageLang,$this->hlp->getIDPart($ID));
345        $newPage = cleanID($newPage);
346
347        // Check if Page exists
348        if ( $newPage != $ID && page_exists($newPage, '', false) ) {
349            // $newPage redirect
350
351            if ( auth_quickaclcheck($newPage) < AUTH_READ ) { return; }
352
353            session_write_close();
354            $this->_redirect($newPage);
355        }
356        else
357        if ( $override ) {
358            // cleanup redirect
359            session_write_close();
360
361            if ( auth_quickaclcheck($newPage) < AUTH_READ ) { return; }
362
363            $this->_redirect($ID);
364        }
365
366        // no redirect;
367    }
368
369
370    function _redirect($url)
371    {
372        unset($_GET['id']);
373        $more = array();
374
375        if ( !empty($_GET) ) {
376            $params = '';
377            foreach( $_GET as $key => $value ) {
378            	// Possible multiple encodings.
379                $more[$key] = $value;
380            }
381        }
382
383		if ( wl( $url, $more, true, '&') != DOKU_URL . substr($_SERVER['REQUEST_URI'], 1) ) {
384	        header('Location: ' . wl( $url, $more, true, '&'), 302);
385	        exit;
386		}
387    }
388}
389
390//Setup VIM: ex: et ts=4 :
391