admin/langimport.php

   1 <?php //$Id$
   2 ///This file only manages the installation of 1.6 lang packs.
   3 ///in downloads.moodle.org, they are store in separate directory /lang16
   4 ///in local server, they are stored in $CFG->dataroot/lang
   5 ///This helps to avoid confusion.
   6
   7     require_once('../config.php');
   8     require_once($CFG->libdir.'/adminlib.php');
   9
  10     admin_externalpage_setup('langimport');
  11
  12     $mode          = optional_param('mode', 0, PARAM_INT);     //phase
  13     $pack          = optional_param('pack', '', PARAM_FILE);   //pack to install
  14     $displaylang   = $pack;
  15     $uninstalllang = optional_param('uninstalllang', '', PARAM_FILE);
  16     $confirm       = optional_param('confirm', 0, PARAM_BOOL);
  17     $sitelang      = optional_param('sitelangconfig', '', PARAM_FILE);
  18
  19     define('INSTALLATION_OF_SELECTED_LANG', 2);
  20     define('CHANGE_SITE_LANG', 3);
  21     define('DELETION_OF_SELECTED_LANG', 4);
  22     define('UPDATE_ALL_LANG', 5);
  23
  24     $strlang = get_string('langimport','admin');
  25
  26     $strlanguage = get_string("language");
  27     $strthislanguage = get_string("thislanguage");
  28     $title = $strlang;
  29
  30     admin_externalpage_print_header();
  31
  32     //reset and diagnose lang cache permissions
  33     @unlink($CFG->dataroot.'/cache/languages');
  34     if (file_exists($CFG->dataroot.'/cache/languages')) {
  35         notify('Language cache can not be deleted, please check permissions in dataroot.');
  36     }
  37     get_list_of_languages(true); //refresh lang cache
  38
  39     switch ($mode){
  40
  41         case INSTALLATION_OF_SELECTED_LANG:    ///installation of selected language pack
  42
  43             if (confirm_sesskey()) {
  44                 @mkdir ($CFG->dataroot.'/temp/');    //make it in case it's a fresh install, it might not be there
  45                 @mkdir ($CFG->dataroot.'/lang/');
  46
  47                 require_once($CFG->libdir.'/componentlib.class.php');
  48                 if ($cd = new component_installer('http://download.moodle.org', 'lang16',
  49                                                     $pack.'.zip', 'languages.md5', 'lang')) {
  50                     $status = $cd->install(); //returns ERROR | UPTODATE | INSTALLED
  51                     switch ($status) {
  52
  53                         case ERROR:
  54                             if ($cd->get_error() == 'remotedownloadnotallowed') {
  55                                 $a = new stdClass();
  56                                 $a->url = 'http://download.moodle.org/lang16/'.$pack.'.zip';
  57                                 $a->dest= $CFG->dataroot.'/lang';
  58                                 error(get_string($cd->get_error(), 'error', $a));
  59                             } else {
  60                                 error(get_string($cd->get_error(), 'error'));
  61                             }
  62                         break;
  63
  64                         case INSTALLED:
  65                             get_list_of_languages(true); //refresh lang cache
  66                             redirect('langimport.php', get_string('langpackupdated','admin',$pack), -1);
  67                         break;
  68
  69                         case UPTODATE:
  70                         break;
  71
  72                     }
  73                 } else {
  74                     notify('Had an unspecified error with the component installer, sorry.');
  75                 }
  76             }
  77         break;
  78
  79         case CHANGE_SITE_LANG:    //change site language
  80
  81             if (confirm_sesskey()) {
  82                 $langconfig = get_record('config','name','lang');
  83                 $langconfig->value = $sitelang;
  84                 if (!empty($sitelang) && update_record('config',$langconfig)){
  85                     redirect('langimport.php', get_string('sitelangchanged','admin'));
  86                 } else {
  87                     error('Could not update the default site language!');
  88                 }
  89             }
  90
  91         break;
  92         case DELETION_OF_SELECTED_LANG:    //delete a directory(ies) containing a lang pack completely
  93
  94             if (!$confirm && confirm_sesskey()) {
  95                 notice_yesno(get_string('uninstallconfirm', 'admin', $uninstalllang),
  96                              'langimport.php?mode=4&amp;uninstalllang='.$uninstalllang.'&amp;confirm=1&amp;sesskey='.sesskey(),
  97                              'langimport.php');
  98             } else if (confirm_sesskey()) {
  99                 if ($uninstalllang == 'en_utf8') {
 100                     error ('en_utf8 can not be uninstalled!');
 101                 }
 102                 $dest1 = $CFG->dataroot.'/lang/'.$uninstalllang;
 103                 $dest2 = $CFG->dirroot.'/lang/'.$uninstalllang;
 104                 $rm1 = false;
 105                 $rm2 = false;
 106                 if (file_exists($dest1)){
 107                     $rm1 = remove_dir($dest1);
 108                 }
 109                 if (file_exists($dest2)){
 110                     $rm2 = remove_dir($dest2);
 111                 }
 112                 get_list_of_languages(true); //refresh lang cache
 113                 //delete the direcotries
 114                 if ($rm1 or $rm2) {
 115                     redirect('langimport.php', get_string('langpackremoved','admin'), 3);
 116                 } else {    //nothing deleted, possibly due to permission error
 117                     error('An error has occurred, language pack is not completely uninstalled, please check file permissions');
 118                 }
 119             }
 120         break;
 121
 122         case UPDATE_ALL_LANG:    //1 click update for all updatable language packs
 123
 124             //0th pull a list from download.moodle.org,
 125             //key = langname, value = md5
 126             $source = 'http://download.moodle.org/lang16/languages.md5';
 127             $md5array = array();
 128             $updated = 0;    //any packs updated?
 129             $alllangs = array_keys(get_list_of_languages(false, true)); //get all available langs
 130             $lang16 = array();   //all the Moodle 1.6 unicode lang packs (updated and not updated)
 131             $packs = array();    //all the packs that needs updating
 132
 133
 134             if (!$availablelangs = proxy_url($source)) {
 135                 error ('can not read from course');
 136             }
 137
 138             //and build an associative array
 139             foreach ($availablelangs as $alang) {
 140                 $md5array[$alang[0]] = $alang[1];
 141             }
 142
 143             //filtering out non-16 packs
 144             foreach ($alllangs as $clang) {
 145                 $dest1 = $CFG->dataroot.'/lang/'.$clang;
 146                 $dest2 = $CFG->dirroot.'/lang/'.$clang;
 147
 148                 if (file_exists($dest1.'/langconfig.php') || file_exists($dest2.'/langconfig.php')){
 149                     $lang16[] = $clang;
 150                 }
 151             }
 152
 153             //then filter out packs that have the same md5 key
 154             foreach ($lang16 as $clang) {
 155                 if (!is_installed_lang($clang, $md5array[$clang])){
 156                     $packs[] = $clang;
 157                 }
 158             }
 159
 160             @mkdir ($CFG->dataroot.'/temp/');
 161             @mkdir ($CFG->dataroot.'/lang/');
 162             foreach ($packs as $pack){    //for each of the remaining in the list, we
 163                 if ($pack == 'en_utf8') {    // no update for en_utf8
 164                     continue;
 165                 }
 166                 //1. delete old director(ies)
 167
 168                 $dest1 = $CFG->dataroot.'/lang/'.$pack;
 169                 $dest2 = $CFG->dirroot.'/lang/'.$pack;
 170                 $rm1 = false;
 171                 $rm2 = false;
 172                 if (file_exists($dest1)) {
 173                     $rm1 = remove_dir($dest1);
 174                 }
 175                 if (file_exists($dest2)) {
 176                     $rm2 = remove_dir($dest2);
 177                 }
 178                 if (!($rm1 || $rm2)) {
 179                     error ('could not delete old directory, update failed');
 180                 }
 181
 182                 //2. copy & unzip into new
 183
 184                 require_once($CFG->libdir.'/componentlib.class.php');
 185                 if ($cd = new component_installer('http://download.moodle.org', 'lang16',
 186                                        $pack.'.zip', 'languages.md5', 'lang')) {
 187                 $status = $cd->install(); //returns ERROR | UPTODATE | INSTALLED
 188                 switch ($status) {
 189
 190                     case ERROR:
 191                         if ($cd->get_error() == 'remotedownloadnotallowed') {
 192                             $a = new stdClass();
 193                             $a->url = 'http://download.moodle.org/lang16/'.$pack.'.zip';
 194                             $a->dest= $CFG->dataroot.'/lang';
 195                             error(get_string($cd->get_error(), 'error', $a));
 196                         } else {
 197                             error(get_string($cd->get_error(), 'error'));
 198                         }
 199                     break;
 200                     case UPTODATE:
 201                         //Print error string or whatever you want to do
 202                     break;
 203                     case INSTALLED:
 204                         notify(get_string('langpackupdated','admin',$pack), 'notifysuccess');
 205                         $updated = true;
 206                         //Print/do whatever you want
 207                     break;
 208                     default:
 209                     }
 210                 } else {
 211
 212                 }
 213             }
 214
 215             if ($updated) {
 216                 notice(get_string('langupdatecomplete','admin'), 'langimport.php');
 217             } else {
 218                 notice(get_string('nolangupdateneeded','admin'), 'langimport.php');
 219             }
 220
 221         break;
 222
 223         default:    //display choice mode
 224
 225             $source = 'http://download.moodle.org/lang16/languages.md5';
 226             $remote = 0;    //flag for reading from remote or local
 227
 228             if ($availablelangs = proxy_url($source)) {
 229                 $remote = 1;
 230             } else {
 231                 $availablelangs = get_local_list_of_languages();
 232             }
 233 /*
 234             if ($fp = fopen($source, 'r')){    /// attempt to get the list from Moodle.org.
 235                 while(!feof ($fp)) {
 236                     $availablelangs[] = split(',', fgets($fp,1024));
 237                 }
 238                 $remote = 1;    //can read from download.moodle.org
 239             } else {    /// fopen failed, we find local copy of list.
 240                 $availablelangs = get_local_list_of_languages();
 241             }
 242 */
 243             if (!$remote) {
 244                 print_box_start();
 245                 print_string('remotelangnotavailable','admin',$CFG->dataroot.'/lang/');
 246                 print_box_end();
 247             }
 248
 249             print_box_start();
 250             echo '<table summary="">';
 251             echo '<tr><td align="center" valign="top">';
 252             echo '<form id="uninstallform" action="langimport.php?mode=4" method="post">';
 253             echo '<fieldset class="invisiblefieldset">';
 254             echo '<input name="sesskey" type="hidden" value="'.sesskey().'" />';
 255             $installedlangs = get_list_of_languages(false, true);
 256
 257             /// display installed langs here
 258
 259             echo '<label for="uninstalllang">'.get_string('installedlangs','admin')."</label><br />\n";
 260             echo '<select name="uninstalllang" id="uninstalllang" size="15">';
 261             foreach ($installedlangs as $clang =>$ilang){
 262                 echo '<option value="'.$clang.'">'.$ilang.'</option>';
 263             }
 264             echo '</select>';
 265             echo '<br /><input type="submit" value="'.get_string('uninstall','admin').'" />';
 266             echo '</fieldset>';
 267             echo '</form>';
 268             echo '<form id="updateform" action="langimport.php?mode=5" method="post">';
 269             echo '<div>';
 270             echo '<br /><input type="submit" value="'.get_string('updatelangs','admin').'" />';
 271             echo '</div>';
 272             echo '</form>';
 273
 274             /// Display option to change site language
 275
 276             /// display to be installed langs here
 277
 278             echo '</td><td align="center" valign="top">';
 279             //availabe langs table
 280             $empty = 1;    //something to pring
 281
 282             /// if this language pack is not already installed, then we allow installation
 283
 284             echo '<form id="installform" method="post" action="langimport.php?mode=2">';
 285             echo '<fieldset class="invisiblefieldset">';
 286             echo '<input name="sesskey" type="hidden" value="'.sesskey().'" />';
 287             echo '<label for="pack">'.get_string('availablelangs','admin')."</label><br />\n";
 288             if ($remote) {
 289                 echo '<select name="pack" id="pack" size="15">';
 290             }
 291
 292             foreach ($availablelangs as $alang) {
 293                 if (trim($alang[0]) != "en_utf8") {
 294                     if ($remote){
 295                         if (substr($alang[0], -5) == '_utf8') {   //Remove the _utf8 suffix from the lang to show
 296                             $shortlang = substr($alang[0], 0, -5);
 297                         } else {
 298                             $shortlang = $alang[0];
 299                         }
 300                         if (!is_installed_lang($alang[0], $alang[1])){    //if not already installed
 301                             echo '<option value="'.$alang[0].'">'.$alang[2].' ('.$shortlang.')</option>';
 302                         }
 303                     } else {    //print list in local format, and instruction to install
 304                         echo '<tr><td>'.$alang[2].'</td><td><a href="http://download.moodle.org/lang16/'.$alang[0].'.zip">'.get_string('download','admin').'</a></td></tr>';
 305                     }
 306                     $empty = 0;
 307                 }
 308             }
 309             if ($remote) {
 310                 echo '</select>';
 311                 echo '<br /><input type="submit" value="&larr; '.get_string('install','admin').'" />';
 312             }
 313             echo '</fieldset>';
 314             echo '</form>';
 315
 316             if ($empty) {
 317                 echo '<br />';
 318                 print_string('nolanguagetodownload','admin');
 319             }
 320
 321             //close available langs table
 322             echo '</td></tr></table>';
 323             print_simple_box_end();
 324
 325         break;
 326
 327     }    //close of main switch
 328
 329     admin_externalpage_print_footer();
 330
 331     /* returns a list of available language packs from a
 332      * local copy shipped with standard moodle distro
 333      * this is for site that can't perform fopen
 334      * @return array
 335      */
 336     function get_local_list_of_languages() {
 337         global $CFG;
 338         $source = $CFG->wwwroot.'/lib/languages.md5';
 339         $availablelangs = array();
 340         if ($fp = fopen($source, 'r')){
 341             while(!feof ($fp)) {
 342                 $availablelangs[] = split(',', fgets($fp,1024));
 343             }
 344         }
 345         return $availablelangs;
 346     }
 347
 348     /* checks the md5 of the zip file, grabbed from download.moodle.org,
 349      * against the md5 of the local language file from last update
 350      * @param string $lang
 351      * @param string $md5check
 352      * @return bool
 353      */
 354     function is_installed_lang($lang, $md5check) {
 355         global $CFG;
 356         $md5file = $CFG->dataroot.'/lang/'.$lang.'/'.$lang.'.md5';
 357         if (file_exists($md5file)){
 358             return (file_get_contents($md5file) == $md5check);
 359         }
 360         return false;
 361     }
 362
 363     //returns an array of languages, or false if can not read from source
 364     //uses a socket if proxy is set as a config variable
 365     function proxy_url($url) {
 366         global $CFG;
 367
 368         if ($CFG->proxyhost && $CFG->proxyport) {
 369
 370             $proxy_fp = fsockopen($CFG->proxyhost, $CFG->proxyport);
 371             if (!$proxy_fp) {
 372                 return false;    //failed
 373             }
 374             fputs($proxy_fp, "GET $url HTTP/1.0\r\nHost: $CFG->proxyhost\r\n\r\n");
 375
 376             $headers_done = false;
 377             while(!feof($proxy_fp)) {
 378                 $string = fgets($proxy_fp, 1024);
 379                 if(!$headers_done){
 380                     // A new line indicates end of HTTP headers
 381                     $headers_done = ("\r\n" == $string);
 382                 } else {
 383                     $availablelangs[] = split(',', $string);
 384                 }
 385             }
 386             fclose($proxy_fp);
 387
 388         } else {    //proxy not in use
 389             if ($fp = fopen($url, 'r')){    /// attempt to get the list from Moodle.org.
 390                 while(!feof ($fp)) {
 391                     $availablelangs[] = split(',', fgets($fp,1024));
 392                 }
 393             } else {    /// fopen failed, return false.
 394                 return false;
 395             }
 396         }
 397         return $availablelangs;
 398     }
 399 ?>