mod/wiki/view.php

   1 <?php  // $Id$
   2 /// Extended by Michael Schneider
   3 /// This page prints a particular instance of wiki
   4
   5     global $CFG,$USER;
   6
   7     require_once("../../config.php");
   8     require_once("lib.php");
   9     #require_once("$CFG->dirroot/course/lib.php"); // For side-blocks
  10     require_once($CFG->libdir . '/ajax/ajaxlib.php');
  11     require_js(array('yui_yahoo','yui_connection'));
  12
  13     $ewiki_action = optional_param('ewiki_action', '', PARAM_ALPHA);     // Action on Wiki-Page
  14     $id           = optional_param('id', 0, PARAM_INT);                  // Course Module ID, or
  15     $wid          = optional_param('wid', 0, PARAM_INT);                 // Wiki ID
  16     $page         = optional_param('page', false);       // Wiki Page Name
  17     $q            = optional_param('q',"");              // Search Context
  18     $userid       = optional_param('userid', 0, PARAM_INT);              // User wiki.
  19     $groupid      = optional_param('groupid', 0, PARAM_INT);             // Group wiki.
  20     $canceledit   = optional_param('canceledit','', PARAM_ALPHA);          // Editing has been cancelled
  21     $cacheme      = optional_param('allowcache', 1, PARAM_INT);   // Set this to 0 to try and disable page caching.
  22
  23     // Only want to add edit log entries if we have made some changes ie submitted a form
  24     $editsave = optional_param('thankyou', '');
  25
  26     if($page) {
  27         // Split page command into action and page
  28         $actions = explode('/', $page,2);
  29         if(count($actions)==2) {
  30             $pagename=$actions[1];
  31         } else {
  32             $pagename=$actions[0];
  33         }
  34     } else {
  35         $actions=array('');
  36         $pagename='';
  37     }
  38
  39     if ($id) {
  40         if (! $cm = get_coursemodule_from_id('wiki', $id)) {
  41             error("Course Module ID was incorrect");
  42         }
  43
  44         if (! $course = get_record("course", "id", $cm->course)) {
  45             error("Course is misconfigured");
  46         }
  47
  48         if (! $wiki = get_record("wiki", "id", $cm->instance)) {
  49             error("Course module is incorrect");
  50         }
  51
  52     } else {
  53         if (! $wiki = get_record("wiki", "id", $wid)) {
  54             error("Course module is incorrect");
  55         }
  56         if (! $course = get_record("course", "id", $wiki->course)) {
  57             error("Course is misconfigured");
  58         }
  59         if (! $cm = get_coursemodule_from_instance("wiki", $wiki->id, $course->id)) {
  60             error("Course Module ID was incorrect");
  61         }
  62         $id = $cm->id;
  63         $_REQUEST["id"] = $id;
  64     }
  65
  66     require_course_login($course, true, $cm);
  67
  68     /// Add the course module 'groupmode' to the wiki object, for easy access.
  69     $wiki->groupmode = $cm->groupmode;
  70
  71     /// Default format:
  72     $moodle_format=FORMAT_MOODLE;
  73
  74     ### SAVE ID from Moodle
  75     $moodleID=@$_REQUEST["id"];
  76
  77 /// Globally disable CamelCase, if the option is selected for this wiki.
  78     $moodle_disable_camel_case = ($wiki->disablecamelcase == 1);
  79
  80     if (($wiki_entry = wiki_get_default_entry($wiki, $course, $userid, $groupid))) {
  81         // OK, now we know the entry ID, we can do lock etc.
  82
  83         // If true, we are 'really' on an editing page, not just on edit/something
  84         $reallyedit=$actions[0]=='edit' && !$canceledit && !$editsave;
  85
  86         // Remove lock when we go to another wiki page (such as the cancel page)
  87         if(!$reallyedit) {
  88             wiki_release_lock($wiki_entry->id,$pagename);
  89         } else if(array_key_exists('content',$_POST)) {
  90             // Do not allow blank content because it causes problems (the wiki decides
  91             // the page should automatically go into edit mode, but Moodle doesn't realise
  92             // this and filters out the JS)
  93             if($_POST['content']=='') {
  94                 $_POST['content']="\n";
  95                 $_REQUEST['content']="\n";
  96             }
  97
  98             // We must have the edit lock in order to be permitted to save
  99             list($ok,$lock)=wiki_obtain_lock($wiki_entry->id,$pagename);
 100             if(!$ok) {
 101                 $strsavenolock=get_string('savenolock','wiki');
 102                 error($strsavenolock,$CFG->wwwroot.'/mod/wiki/view.php?id='.$cm->id.'&page=view/'.urlencode($pagename));
 103             }
 104         }
 105
 106 ///     ################# EWIKI Part ###########################
 107 ///     The wiki_entry->pagename is set to the specified value of the wiki,
 108 ///     or the default value in the 'lang' file if the specified value was empty.
 109         define("EWIKI_PAGE_INDEX",$wiki_entry->pagename);
 110
 111         /// If the page has a ' in it, it may have slashes added to it. Remove them if it does.
 112         $page = ($page === false) ?  stripslashes(EWIKI_PAGE_INDEX) : stripslashes($page);
 113
 114 ///     # Prevent ewiki getting id as PageID...
 115         unset($_REQUEST["id"]);
 116         unset($_GET["id"]);
 117         unset($_POST["id"]);
 118         unset($_POST["id"]);
 119         unset($_SERVER["QUERY_STRING"]);
 120         if (isset($HTTP_GET_VARS)) {
 121             unset($HTTP_GET_VARS["id"]);
 122         }
 123         if (isset($HTTP_POST_VARS)) {
 124             unset($HTTP_POST_VARS["id"]);
 125         }
 126         global $ewiki_title;
 127
 128 ///     #-- predefine some of the configuration constants
 129
 130
 131         /// EWIKI_NAME is defined in ewikimoodlelibs, so that also admin.php can use this
 132         #define("EWIKI_NAME", $wiki_entry->pagename);
 133
 134         /// Search Hilighting
 135         if($ewiki_title=="SearchPages") {
 136             $qArgument="&amp;q=".urlencode($q);
 137         }
 138
 139         /// Build the ewsiki script constant
 140         /// ewbase will also be needed by EWIKI_SCRIPT_BINARY
 141         $ewbase = 'view.php?id='.$moodleID;
 142         if (isset($userid) && $userid!=0) $ewbase .= '&amp;userid='.$userid;
 143         if (isset($groupid) && $groupid!=0) $ewbase .= '&amp;groupid='.$groupid;
 144         $ewscript = $ewbase.'&amp;page=';
 145         define("EWIKI_SCRIPT", $ewscript);
 146         define("EWIKI_SCRIPT_URL", $ewscript);
 147
 148         /// # Settings for this specific Wiki
 149         define("EWIKI_PRINT_TITLE", $wiki->ewikiprinttitle);
 150
 151         define("EWIKI_INIT_PAGES", wiki_content_dir($wiki));
 152
 153 ///     # Moodle always addslashes to everything so we are going to strip them always
 154 ///     # to allow wiki itself to add them again. It's a triple add-strip-add but
 155 ///     # was the only way to solve the problem without modifying how the rest of
 156 ///     # the module works.
 157         include($CFG->dirroot."/mod/wiki/ewiki/fragments/strip_wonderful_slashes.php");
 158
 159         if (ini_get("register_globals")) {
 160             #    include($CFG->dirroot."/mod/wiki/ewiki/fragments/strike_register_globals.php");
 161         }
 162
 163         # Database Handler
 164         include_once($CFG->dirroot."/mod/wiki/ewikimoodlelib.php");
 165         # Plugins
 166         //include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/email_protect.php");
 167         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/patchsaving.php");
 168         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/notify.php");
 169         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/feature/imgresize_gd.php");
 170         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/moodle_highlight.php");
 171         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/f_fixhtml.php");
 172         #include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/wikinews.php");
 173         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/sitemap.php");
 174         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/moodle_wikidump.php");
 175         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/aview/backlinks.php");
 176         #include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/markup/css.php");
 177         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/markup/footnotes.php");
 178         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/diff.php");
 179         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/page/pageindex.php");
 180         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/page/orphanedpages.php");
 181         include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/wantedpages.php");
 182
 183         # Binary Handling
 184         if($wiki->ewikiacceptbinary) {
 185             define("EWIKI_UPLOAD_MAXSIZE", get_max_upload_file_size());
 186             define("EWIKI_SCRIPT_BINARY", $ewbase."&binary=");
 187             define("EWIKI_ALLOW_BINARY",1);
 188             define("EWIKI_IMAGE_CACHING",1);
 189             #define("EWIKI_AUTOVIEW",1);
 190             include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/lib/mime_magic.php");
 191             include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/aview/downloads.php");
 192             include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/downloads.php");
 193             #include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/db/binary_store.php");
 194             include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/moodle_binary_store.php");
 195         } else {
 196             define("EWIKI_SCRIPT_BINARY", 0);
 197             define("EWIKI_ALLOW_BINARY",0);
 198         }
 199
 200         # The mighty Wiki itself
 201         include_once($CFG->dirroot."/mod/wiki/ewiki/ewiki.php");
 202
 203         if($canceledit) {
 204           if ($delim = strpos($page, EWIKI_ACTION_SEP_CHAR)) {
 205             @$page = substr($page, $delim + 1);
 206           } else {
 207             @$page="";
 208           }
 209         }
 210         # Language-stuff: eWiki gets language from Browser. Lets correct it. Empty arrayelements do no harm
 211         $ewiki_t["languages"]=array(current_language(), $course->lang, $CFG->lang,"en","c");
 212
 213         # Check Access Rights
 214         $canedit = wiki_can_edit_entry($wiki_entry, $wiki, $USER, $course);
 215         if (!$canedit) {
 216             # Protected Mode
 217             unset($ewiki_plugins["action"]["edit"]);
 218             unset($ewiki_plugins["action"]["info"]);
 219         }
 220
 221         # HTML Handling
 222         $ewiki_use_editor=0;
 223         if($wiki->htmlmode == 0) {
 224             # No HTML
 225             $ewiki_config["htmlentities"]=array(); // HTML is managed by moodle
 226             $moodle_format=FORMAT_TEXT;
 227         }
 228         if($wiki->htmlmode == 1) {
 229             # Safe HTML
 230             include_once($CFG->dirroot."/mod/wiki/ewiki/plugins/moodle/moodle_rescue_html.php");
 231             $moodle_format=FORMAT_HTML;
 232         }
 233         if($wiki->htmlmode == 2) {
 234             # HTML Only
 235             $moodle_format=FORMAT_HTML;
 236             $ewiki_use_editor=1;
 237             $ewiki_config["htmlentities"]=array(); // HTML is allowed
 238             $ewiki_config["wiki_link_regex"] = "\007 [!~]?(
 239                         \#?\[[^<>\[\]\n]+\] |
 240                         \^[-".EWIKI_CHARS_U.EWIKI_CHARS_L."]{3,} |
 241                         \b([\w]{3,}:)*([".EWIKI_CHARS_U."]+[".EWIKI_CHARS_L."]+){2,}\#?[\w\d]* |
 242                         \w[-_.+\w]+@(\w[-_\w]+[.])+\w{2,}   ) \007x";
 243         }
 244
 245         global $ewiki_author, $USER;
 246         $ewiki_author=fullname($USER);
 247         $content=ewiki_page($page);
 248         $content2='';
 249
 250         ### RESTORE ID from Moodle
 251         $_REQUEST["id"]=$moodleID;
 252         $id=$moodleID;
 253 ///     ################# EWIKI Part ###########################
 254     }
 255     else {
 256         $content = '';
 257         $content2 = '<div class="boxaligncenter">'.get_string('nowikicreated', 'wiki').'</div>';
 258
 259     }
 260
 261     # Group wiki, ...: No page and no ewiki_title
 262     if(!isset($ewiki_title)) {
 263           $ewiki_title="";
 264     }
 265
 266
 267 /// Moodle Log
 268     if ($editsave != NULL) { /// We've submitted an edit and have been redirected back here
 269         add_to_log($course->id, "wiki", 'edit',
 270                addslashes("view.php?id=$cm->id&amp;groupid=$groupid&amp;userid=$userid&amp;page=$ewiki_title"),
 271                format_string($wiki->name,true).": ".$ewiki_title, $cm->id, $userid);
 272     } else if ($ewiki_action != 'edit') {
 273         add_to_log($course->id, "wiki", $ewiki_action,
 274                addslashes("view.php?id=$cm->id&amp;groupid=$groupid&amp;userid=$userid&amp;page=$ewiki_title"),
 275                format_string($wiki->name,true).": ".$ewiki_title, $cm->id, $userid);
 276     }
 277
 278
 279 /// Print the page header
 280
 281     $strwikis = get_string("modulenameplural", "wiki");
 282     $strwiki  = get_string("modulename", "wiki");
 283
 284     $navlinks = array();
 285     $navlinks[] = array('name' => $strwikis, 'link' => "index.php?id=$course->id", 'type' => 'activity');
 286     $navlinks[] = array('name' => format_string($wiki->name,true), 'link' => "view.php?id=$moodleID", 'type' => 'activityinstace');
 287
 288     $navigation = build_navigation($navlinks);
 289
 290     print_header_simple($ewiki_title?$ewiki_title:format_string($wiki->name), "", $navigation,
 291                 "", "", $cacheme, update_module_button($cm->id, $course->id, $strwiki),
 292                 navmenu($course, $cm));
 293
 294
 295     /// Print Page
 296     echo '    <div id="wikiPageActions">
 297     ';
 298     /// The top row contains links to other wikis, if applicable.
 299     if ($wiki_entry && $wiki_list = wiki_get_other_wikis($wiki, $USER, $course, $wiki_entry->id)) {
 300         //echo "wiki list ";print_r($wiki_list);
 301         $selected="";
 302
 303         if (isset($wiki_list['selected'])) {
 304             $selected = $wiki_list['selected'];
 305             unset($wiki_list['selected']);
 306         }
 307         echo '<tr><td colspan="2">';
 308
 309         echo '<form id="otherwikis" action="'.$CFG->wwwroot.'/mod/wiki/view.php">';
 310         echo '<table border="0" cellpadding="0" cellspacing="0" width="100%"><tr>';
 311         echo '<td class="sideblockheading">&nbsp;'
 312             .$WIKI_TYPES[$wiki->wtype].' '
 313             .get_string('modulename', 'wiki')." ".get_string('for',"wiki")." "
 314             .wiki_get_owner($wiki_entry).':</td>';
 315
 316         echo '<td class="sideblockheading">'
 317             .get_string('otherwikis', 'wiki').':&nbsp;&nbsp;';
 318         $script = 'self.location=getElementById(\'otherwikis\').wikiselect.options[getElementById(\'otherwikis\').wikiselect.selectedIndex].value';
 319         choose_from_menu($wiki_list, "wikiselect", $selected, "choose", $script);
 320         echo '</td>';
 321         echo '</tr></table>';
 322         echo '</form>';
 323
 324         echo '</td>';
 325         echo '</tr>';
 326     }
 327
 328     if ($wiki_entry) {
 329         $specialpages=array("WikiExport", "SiteMap", "SearchPages", "PageIndex","NewestPages","MostVisitedPages","MostOftenChangedPages","UpdatedPages","FileDownload","FileUpload","OrphanedPages","WantedPages");
 330     /// Page Actions
 331         echo '<table border="0" width="100%">';
 332         echo '<tr>';
 333
 334         /// Searchform
 335         echo '<td class="wikisearchform">';
 336         wiki_print_search_form($cm->id, $q, $userid, $groupid, false);
 337         echo '</td>';
 338
 339         /// Internal Wikilinks
 340         echo '<td class="wikilinksblock">';
 341         wiki_print_wikilinks_block($cm->id,  $wiki->ewikiacceptbinary);
 342         echo '</td>';
 343
 344         /// Administrative Links
 345         if($canedit) {
 346           echo '<td class="wikiadminactions">';
 347           wiki_print_administration_actions($wiki, $cm->id, $userid, $groupid, $ewiki_title, $wiki->htmlmode!=2, $course);
 348           echo '</td>';
 349         }
 350
 351         /// Formatting Rules
 352         echo '<td class="howtowiki">';
 353         helpbutton('howtowiki', get_string('howtowiki', 'wiki'), 'wiki');
 354         echo '</td>';
 355
 356         echo '</tr></table>';
 357     }
 358
 359     echo '</div>
 360     <div id="wiki-view" class="mwiki">
 361     ';
 362
 363     if($wiki_entry && $ewiki_title==$wiki_entry->pagename && !empty($wiki->summary)) {
 364       if (trim(strip_tags($wiki->summary))) {
 365           print_box(format_text($wiki->summary, FORMAT_MOODLE), 'generalbox', 'intro');
 366       }
 367     }
 368
 369     // The wiki Contents
 370
 371     if (!empty($canedit)) {   /// Print tabs with commands for this page
 372         $tabs = array('view', 'edit','links','info');
 373         if ($wiki->ewikiacceptbinary) {
 374             $tabs[] = 'attachments';
 375         }
 376
 377         $tabrows = array();
 378         $row  = array();
 379         $currenttab = '';
 380         foreach ($tabs as $tab) {
 381             $tabname = get_string("tab$tab", 'wiki');
 382             $row[] = new tabobject($tabname, $ewbase.'&amp;page='.$tab.'/'.$ewiki_id, $tabname);
 383             if ($ewiki_action == "$tab" or in_array($page, $specialpages)) {
 384                 $currenttab = $tabname;
 385             }
 386         }
 387         $tabrows[] = $row;
 388
 389         print_tabs($tabrows, $currenttab);
 390     }
 391
 392     /// Insert a link to force page refresh if new content isn't showing.
 393
 394     // build new URL + query string
 395     $queries = preg_split('/[?&]/', me());
 396     $nqueries = count($queries);
 397     $me = $queries[0] . '?';
 398     for($i=1; $i < $nqueries; $i++)
 399     {
 400         if( !strstr($queries[$i], 'allowcache') )
 401             $me .= $queries[$i] . '&amp;';
 402     }
 403     $me .= 'allowcache=0';
 404
 405     // Insert the link
 406     $linkdesc = get_string('reloadlinkdescription', 'wiki');
 407     $linktext = get_string('reloadlinktext', 'wiki');
 408     echo "<div class='wikilinkright'><a href='$me' title='$linkdesc'><input type='button' value='$linktext' /></a></div>";
 409
 410     print_simple_box_start('center', '100%', '', '20');
 411
 412     /// Don't filter any pages containing wiki actions (except view). A wiki page containing
 413     /// actions will have the form [action]/[pagename]. If the action is 'view' or the  '/'
 414     /// isn't there (so the action defaults to 'view'), filter it.
 415     /// If the page does not yet exist, the display will default to 'edit'.
 416     if((count($actions) < 2 || $actions[0] == "view") && $wiki_entry &&
 417         record_exists('wiki_pages', 'pagename', addslashes($page), 'wiki', $wiki_entry->id)) {
 418         print(format_text($content, $moodle_format));
 419     } else if($actions[0]=='edit' && $reallyedit) {
 420         // Check the page isn't locked before printing out standard wiki content. (Locking
 421         // is implemented as a wrapper over the existing wiki.)
 422         list($gotlock,$lock)=wiki_obtain_lock($wiki_entry->id,$pagename);
 423         if(!$gotlock) {
 424             $modcontext = get_context_instance(CONTEXT_MODULE, $cm->id);
 425             $canoverridelock = has_capability('mod/wiki:overridelock', $modcontext);
 426
 427             $a=new stdClass;
 428             $a->since=userdate($lock->lockedsince);
 429             $a->seen=userdate($lock->lockedseen);
 430             $user=get_record('user','id',$lock->lockedby);
 431             $a->name=fullname($user,
 432               has_capability('moodle/site:viewfullnames', $modcontext));
 433
 434             print_string('pagelocked','wiki',$a);
 435
 436             if($canoverridelock) {
 437                 $pageesc=htmlspecialchars($page);
 438                 $stroverrideinfo=get_string('overrideinfo','wiki');
 439                 $stroverridebutton=get_string('overridebutton','wiki');
 440                 $sesskey=sesskey();
 441                 print "
 442 <form id='overridelock' method='post' action='overridelock.php'>
 443   <div>
 444   <input type='hidden' name='sesskey' value='$sesskey' />
 445   <input type='hidden' name='id' value='$id' />
 446   <input type='hidden' name='page' value='$pageesc' />
 447   $stroverrideinfo
 448   <input type='submit' value='$stroverridebutton' />
 449   </div>
 450 </form>
 451 ";
 452             }
 453         } else {
 454             // OK, the page is now locked to us. Put in the AJAX for keeping the lock
 455             $strlockcancelled=get_string('lockcancelled','wiki');
 456             $strnojslockwarning=get_string('nojslockwarning','wiki');
 457             $intervalms=WIKI_LOCK_RECONFIRM*1000;
 458             print "
 459 <script type='text/javascript'>
 460 var intervalID;
 461 function handleResponse(o) {
 462     if(o.responseText=='cancel') {
 463         document.forms['ewiki'].elements['preview'].disabled=true;
 464         document.forms['ewiki'].elements['save'].disabled=true;
 465         clearInterval(intervalID);
 466         alert('$strlockcancelled');
 467     }
 468 }
 469 function handleFailure(o) {
 470     // Ignore for now
 471 }
 472 intervalID=setInterval(function() {
 473     YAHOO.util.Connect.asyncRequest('POST','confirmlock.php',
 474         {success:handleResponse,failure:handleFailure},'lockid={$lock->id}');
 475     },$intervalms);
 476 </script>
 477 <noscript><p>
 478 $strnojslockwarning
 479 </p></noscript>
 480 ";
 481             // Print editor etc
 482             print $content;
 483         }
 484     } else {
 485         print $content;
 486     }
 487     print $content2;
 488     print_simple_box_end();
 489     echo "<br />";
 490
 491 /// Finish the page
 492     echo '
 493     </div>
 494     ';
 495
 496     print_footer($course);
 497 ?>