e25637cb254a963a81d0e3c3a881c319c6246d7b
[moodle.git] / webservice / renderer.php
1 <?php
2 ///////////////////////////////////////////////////////////////////////////
3 //                                                                       //
4 // This file is part of Moodle - http://moodle.org/                      //
5 // Moodle - Modular Object-Oriented Dynamic Learning Environment         //
6 //                                                                       //
7 // Moodle is free software: you can redistribute it and/or modify        //
8 // it under the terms of the GNU General Public License as published by  //
9 // the Free Software Foundation, either version 3 of the License, or     //
10 // (at your option) any later version.                                   //
11 //                                                                       //
12 // Moodle is distributed in the hope that it will be useful,             //
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of        //
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
15 // GNU General Public License for more details.                          //
16 //                                                                       //
17 // You should have received a copy of the GNU General Public License     //
18 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.       //
19 //                                                                       //
20 ///////////////////////////////////////////////////////////////////////////
22 /**
23  * Web service documentation renderer.
24  * @package   webservice
25  * @copyright 2009 Moodle Pty Ltd (http://moodle.com)
26  * @author    Jerome Mouneyrac
27  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
28  */
30 class core_webservice_renderer extends plugin_renderer_base {
32     /**
33      *  Display Reset token confirmation box
34      * @param object $token to reset
35      * @return string html
36      */
37     public function user_reset_token_confirmation($token) {
38         global $OUTPUT, $CFG;
39         $managetokenurl = $CFG->wwwroot."/user/managetoken.php?sesskey=" . sesskey();
40         $optionsyes = array('tokenid'=>$token->id, 'action'=>'resetwstoken', 'confirm'=>1, 'sesskey'=>sesskey());
41         $optionsno  = array('section'=>'webservicetokens', 'sesskey'=>sesskey());
42         $formcontinue = new single_button(new moodle_url($managetokenurl, $optionsyes), get_string('reset'));
43         $formcancel = new single_button(new moodle_url($managetokenurl, $optionsno), get_string('cancel'), 'get');
44         $html = $OUTPUT->confirm(get_string('resettokenconfirm', 'webservice', 
45                 (object)array('user'=>$token->firstname." ".$token->lastname, 'service'=>$token->name)),
46                 $formcontinue, $formcancel);
47         return $html;
48     }
52     /**
53      * Display user tokens with buttons to reset them
54      * @param object $tokens
55      * @param int $userid
56      * @return string html code
57      */
58     public function user_webservice_tokens_box($tokens, $userid) {
59         global $OUTPUT, $CFG;
61         // display strings
62         $stroperation = get_string('operation', 'webservice');
63         $strtoken = get_string('key', 'webservice');
64         $strservice = get_string('service', 'webservice');
65         $strcreator = get_string('tokencreator', 'webservice');
66         $strcontext = get_string('context', 'webservice');
67         $strvaliduntil = get_string('validuntil', 'webservice');
69         $return = $OUTPUT->heading(get_string('securitykeys', 'webservice'), 3, 'main', true);
70         $return .= $OUTPUT->box_start('generalbox webservicestokenui');
72         $return .= get_string('keyshelp', 'webservice');
74         $table = new html_table();
75         $table->head  = array($strtoken, $strservice, $strvaliduntil, $strcreator, $stroperation);
76         $table->align = array('left', 'left', 'left', 'center', 'left', 'center');
77         $table->width = '100%';
78         $table->data  = array();
80         if (!empty($tokens)) {
81             foreach ($tokens as $token) {
82                 //TODO: retrieve context
84                 if ($token->creatorid == $userid) {
85                     $reset = "<a href=\"".$CFG->wwwroot."/user/managetoken.php?sesskey=".sesskey().
86                             "&amp;action=resetwstoken&amp;tokenid=".$token->id."\">";
87                     $reset .= get_string('reset')."</a>";
88                     $creator = $token->firstname." ".$token->lastname;
89                 } else {
90                     //retrive administrator name
91                     require_once($CFG->dirroot.'/user/lib.php');
92                     $creators = user_get_users_by_id(array($token->creatorid));
93                     $admincreator = $creators[$token->creatorid];
94                     $creator = $admincreator->firstname." ".$admincreator->lastname;
95                     $reset = '';
96                 }
98                 $userprofilurl = new moodle_url('/user/view.php?id='.$token->creatorid);
99                 $creatoratag = html_writer::start_tag('a', array('href' => $userprofilurl));
100                 $creatoratag .= $creator;
101                 $creatoratag .= html_writer::end_tag('a');
103                 $validuntil = '';
104                 if (!empty($token->validuntil)) {
105                     $validuntil = date("F j, Y"); //TODO: language support (look for moodle function)
106                 }
108                 $table->data[] = array($token->token, $token->name, $validuntil, $creatoratag, $reset);
109             }
110             $return .= html_writer::table($table);
112         } else {
113             $return .= get_string('notoken', 'webservice');
114         }
116         $return .= $OUTPUT->box_end();
117         return $return;
118     }
122      /**
123      * Return documentation for a ws description object
124      * ws description object can be 'external_multiple_structure', 'external_single_structure' or 'external_value'
125      * Example of documentation for moodle_group_create_groups function:
126        list of (
127        object {
128        courseid int //id of course
129        name string //multilang compatible name, course unique
130        description string //group description text
131        enrolmentkey string //group enrol secret phrase
132        }
133        )
134      * @param object $params a part of parameter/return description
135      * @return string the html to display
136      */
137     public function detailed_description_html($params) {
138     /// retrieve the description of the description object
139         $paramdesc = "";
140         if (!empty($params->desc)) {
141             $paramdesc .= html_writer::start_tag('span', array('style' => "color:#2A33A6"));
142             if ($params->required == VALUE_REQUIRED) {
143                 $required = '';
144             }
145             if ($params->required == VALUE_DEFAULT) {
146                 if ($params->default === null) {
147                     $params->default = "null";
148                 }
149                 $required = html_writer::start_tag('b', array()).get_string('default', 'webservice', $params->default).html_writer::end_tag('b');
150             }
151             if ($params->required == VALUE_OPTIONAL) {
152                 $required = html_writer::start_tag('b', array()).get_string('optional', 'webservice').html_writer::end_tag('b');
153             }
154             $paramdesc .= " ".$required." ";
155             $paramdesc .= html_writer::start_tag('i', array());
156             $paramdesc .= "//";
158             $paramdesc .= $params->desc;
160             $paramdesc .= html_writer::end_tag('i');
161             
162             $paramdesc .= html_writer::end_tag('span');
163             $paramdesc .= html_writer::empty_tag('br', array());
164         }
166     /// description object is a list
167         if ($params instanceof external_multiple_structure) {
168             return $paramdesc . "list of ( " . html_writer::empty_tag('br', array()) . $this->detailed_description_html($params->content) . ")";
169         } else if ($params instanceof external_single_structure) {
170     /// description object is an object
171             $singlestructuredesc = $paramdesc."object {". html_writer::empty_tag('br', array());
172             foreach ($params->keys as $attributname => $attribut) {
173                 $singlestructuredesc .= html_writer::start_tag('b', array());
174                 $singlestructuredesc .= $attributname;
175                 $singlestructuredesc .= html_writer::end_tag('b');
176                 $singlestructuredesc .= " ".$this->detailed_description_html($params->keys[$attributname]);
177             }
178             $singlestructuredesc .= "} ";
179             $singlestructuredesc .= html_writer::empty_tag('br', array());
180             return $singlestructuredesc;
181         } else {
182     /// description object is a primary type (string, integer)
183             switch($params->type) {
184                 case PARAM_BOOL: // 0 or 1 only for now
185                 case PARAM_INT:
186                     $type = 'int';
187                     break;
188                 case PARAM_FLOAT;
189                     $type = 'double';
190                     break;
191                 default:
192                     $type = 'string';
193             }
194             return $type." ".$paramdesc;
195         }
196     }
198     /**
199      * Return a description object in indented xml format (for REST response)
200      * It is indented in order to be displayed into <pre> tag
201      * @param object $returndescription
202      * @param string $indentation composed by space only
203      * @return string the html to diplay
204      */
205     public function description_in_indented_xml_format($returndescription, $indentation = "") {
206         $indentation = $indentation . "    ";
207         $brakeline = <<<EOF
210 EOF;
211     /// description object is a list
212         if ($returndescription instanceof external_multiple_structure) {
213             $return  = $indentation."<MULTIPLE>".$brakeline;
214             $return .= $this->description_in_indented_xml_format($returndescription->content, $indentation);
215             $return .= $indentation."</MULTIPLE>".$brakeline;
216             return $return;
217         } else if ($returndescription instanceof external_single_structure) {
218     /// description object is an object
219             $singlestructuredesc = $indentation."<SINGLE>".$brakeline;
220             $keyindentation = $indentation."    ";
221             foreach ($returndescription->keys as $attributname => $attribut) {
222                 $singlestructuredesc .= $keyindentation."<KEY name=\"".$attributname."\">".$brakeline.
223                         $this->description_in_indented_xml_format($returndescription->keys[$attributname], $keyindentation).
224                         $keyindentation."</KEY>".$brakeline;
225             }
226             $singlestructuredesc .= $indentation."</SINGLE>".$brakeline;
227             return $singlestructuredesc;
228         } else {
229     /// description object is a primary type (string, integer)
230             switch($returndescription->type) {
231                 case PARAM_BOOL: // 0 or 1 only for now
232                 case PARAM_INT:
233                     $type = 'int';
234                     break;
235                 case PARAM_FLOAT;
236                     $type = 'double';
237                     break;
238                 default:
239                     $type = 'string';
240             }
241             return $indentation."<VALUE>".$type."</VALUE>".$brakeline;
242         }
243     }
245      /**
246      * Create indented XML-RPC  param description
247      * @param object $paramdescription
248      * @param string $indentation composed by space only
249      * @return string the html to diplay
250      */
251     public function xmlrpc_param_description_html($paramdescription, $indentation = "") {
252         $indentation = $indentation . "    ";
253         $brakeline = <<<EOF
256 EOF;
257     /// description object is a list
258         if ($paramdescription instanceof external_multiple_structure) {
259             $return  = $brakeline.$indentation."Array ";
260             $indentation = $indentation . "    ";
261             $return .= $brakeline.$indentation."(";
262             $return .= $brakeline.$indentation."[0] =>";
263             $return .= $this->xmlrpc_param_description_html($paramdescription->content, $indentation);
264             $return .= $brakeline.$indentation.")";
265             return $return;
266         } else if ($paramdescription instanceof external_single_structure) {
267     /// description object is an object
268             $singlestructuredesc = $brakeline.$indentation."Array ";
269             $keyindentation = $indentation."    ";
270             $singlestructuredesc  .= $brakeline.$keyindentation."(";
271             foreach ($paramdescription->keys as $attributname => $attribut) {
272                 $singlestructuredesc .= $brakeline.$keyindentation."[".$attributname."] =>".
273                         $this->xmlrpc_param_description_html($paramdescription->keys[$attributname], $keyindentation).
274                         $keyindentation;
275             }
276             $singlestructuredesc .= $brakeline.$keyindentation.")";
277             return $singlestructuredesc;
278         } else {
279     /// description object is a primary type (string, integer)
280             switch($paramdescription->type) {
281                 case PARAM_BOOL: // 0 or 1 only for now
282                 case PARAM_INT:
283                     $type = 'int';
284                     break;
285                 case PARAM_FLOAT;
286                     $type = 'double';
287                     break;
288                 default:
289                     $type = 'string';
290             }
291             return " ".$type;
292         }
293     }
295     /**
296      * Return the html of a colored box with content
297      * @param string $title - the title of the box
298      * @param string $content - the content to displayed
299      * @param string $rgb - the background color of the box
300      * @return <type>
301      */
302     public function colored_box_with_pre_tag($title, $content, $rgb = 'FEEBE5') {
303         $coloredbox = html_writer::start_tag('ins', array()); //TODO: this tag removes xhtml strict error but cause warning
304         $coloredbox .= html_writer::start_tag('div', array('style' => "border:solid 1px #DEDEDE;background:#".$rgb.";color:#222222;padding:4px;"));
305         $coloredbox .= html_writer::start_tag('pre', array());
306         $coloredbox .= html_writer::start_tag('b', array());
307         $coloredbox .= $title;
308         $coloredbox .= html_writer::end_tag('b', array());
309         $coloredbox .= html_writer::empty_tag('br', array());
310         $coloredbox .= "\n".$content."\n";
311         $coloredbox .= html_writer::end_tag('pre', array());
312         $coloredbox .= html_writer::end_tag('div', array());
313         $coloredbox .= html_writer::end_tag('ins', array());
314         return $coloredbox;
315     }
318      /**
319      * Return indented REST param description
320      * @param object $paramdescription
321      * @param string $indentation composed by space only
322      * @return string the html to diplay
323      */
324     public function rest_param_description_html($paramdescription, $paramstring) {
325         $brakeline = <<<EOF
328 EOF;
329     /// description object is a list
330         if ($paramdescription instanceof external_multiple_structure) {
331             $paramstring = $paramstring.'[0]';
332             $return = $this->rest_param_description_html($paramdescription->content, $paramstring);
333             return $return;
334         } else if ($paramdescription instanceof external_single_structure) {
335     /// description object is an object
336             $singlestructuredesc = "";
337             $initialparamstring = $paramstring;
338             foreach ($paramdescription->keys as $attributname => $attribut) {
339                 $paramstring = $initialparamstring.'['.$attributname.']';
340                 $singlestructuredesc .= $this->rest_param_description_html($paramdescription->keys[$attributname], $paramstring);
341             }
342             return $singlestructuredesc;
343         } else {
344     /// description object is a primary type (string, integer)
345             $paramstring = $paramstring.'=';
346             switch($paramdescription->type) {
347                 case PARAM_BOOL: // 0 or 1 only for now
348                 case PARAM_INT:
349                     $type = 'int';
350                     break;
351                 case PARAM_FLOAT;
352                     $type = 'double';
353                     break;
354                 default:
355                     $type = 'string';
356             }
357             return $paramstring." ".$type.$brakeline;
358         }
359     }
362     /**
363      * This display all the documentation
364      * @param array $functions contains all decription objects
365      * @param array $authparam keys are either 'username'/'password' or 'token'
366      * @param boolean $printableformat true if we want to display the documentation in a printable format
367      * @param array $activatedprotocol
368      * @return string the html to diplay
369      */
370     public function documentation_html($functions, $printableformat, $activatedprotocol, $authparams) {
371         global $OUTPUT, $CFG;
372         $br = html_writer::empty_tag('br', array());
373         $brakeline = <<<EOF
376 EOF;
377     /// Some general information
378         $documentationhtml = html_writer::start_tag('table', array('style' => "margin-left:auto; margin-right:auto;"));
379         $documentationhtml .= html_writer::start_tag('tr', array());
380         $documentationhtml .= html_writer::start_tag('td', array());
381         $documentationhtml .= get_string('wsdocumentationintro', 'webservice', $authparams['wsusername']);
382         $documentationhtml .= $br.$br;
383         
385     /// Print button
386         $authparams['print'] = true;
387         //$parameters = array ('token' => $token, 'wsusername' => $username, 'wspassword' => $password, 'print' => true);
388         $url = new moodle_url('/webservice/wsdoc.php', $authparams); // Required
389         $documentationhtml .= $OUTPUT->single_button($url, get_string('print','webservice'));
390         $documentationhtml .= $br;
391         
392         
393     /// each functions will be displayed into a collapsible region (opened if printableformat = true)
394         foreach ($functions as $functionname => $description) {
396             if (empty($printableformat)) {
397                 $documentationhtml .= print_collapsible_region_start('',
398                                                                  'aera_'.$functionname,
399                                                                  html_writer::start_tag('strong', array()).$functionname.html_writer::end_tag('strong'),
400                                                                  false,
401                                                                  !$printableformat,
402                                                                  true);
403             } else {
404                 $documentationhtml .= html_writer::tag('strong', $functionname);
405                 $documentationhtml .= $br;
406             }
408         /// function global description
409             $documentationhtml .= $br;
410             $documentationhtml .= html_writer::start_tag('div', array('style' => 'border:solid 1px #DEDEDE;background:#E2E0E0;color:#222222;padding:4px;'));
411             $documentationhtml .= $description->description;
412             $documentationhtml .= html_writer::end_tag('div');
413             $documentationhtml .= $br.$br;
415         /// function arguments documentation
416             $documentationhtml .= html_writer::start_tag('span', array('style' => 'color:#EA33A6'));
417             $documentationhtml .= get_string('arguments', 'webservice');
418             $documentationhtml .= html_writer::end_tag('span');
419             $documentationhtml .= $br;
420             foreach ($description->parameters_desc->keys as $paramname => $paramdesc) {
421             /// a argument documentation
422                 $documentationhtml .= html_writer::start_tag('span', array('style' => 'font-size:80%'));
423                                 
424                 if ($paramdesc->required == VALUE_REQUIRED) {
425                       $required = get_string('required', 'webservice');
426                 }
427                 if ($paramdesc->required == VALUE_DEFAULT) {
428                     if ($paramdesc->default === null) {
429                         $default = "null";
430                     } else {
431                         $default = $paramdesc->default;
432                     }
433                     $required = get_string('default', 'webservice', $default);
434                 }
435                 if ($paramdesc->required == VALUE_OPTIONAL) {
436                       $required = get_string('optional', 'webservice');
437                 }
438                 
439                 $documentationhtml .= html_writer::start_tag('b', array());
440                 $documentationhtml .= $paramname;
441                 $documentationhtml .= html_writer::end_tag('b');
442                 $documentationhtml .= " (" .$required. ")"; // argument is required or optional ?
443                 $documentationhtml .= $br;
444                 $documentationhtml .= "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;".$paramdesc->desc; // argument description
445                 $documentationhtml .= $br.$br;
446                 ///general structure of the argument
447                 $documentationhtml .= $this->colored_box_with_pre_tag(get_string('generalstructure', 'webservice'), 
448                                                                       $this->detailed_description_html($paramdesc),
449                                                                       'FFF1BC');
450                 ///xml-rpc structure of the argument in PHP format
451                 if (!empty($activatedprotocol['xmlrpc'])) {
452                     $documentationhtml .= $this->colored_box_with_pre_tag(get_string('phpparam', 'webservice'), 
453                                                                           htmlentities('['.$paramname.'] =>'.$this->xmlrpc_param_description_html($paramdesc)),
454                                                                           'DFEEE7');
455                 }
456                 ///POST format for the REST protocol for the argument
457                 if (!empty($activatedprotocol['rest'])) {
458                     $documentationhtml .= $this->colored_box_with_pre_tag(get_string('restparam', 'webservice'), 
459                                                                           htmlentities($this->rest_param_description_html($paramdesc,$paramname)),
460                                                                           'FEEBE5');
461                 }
462                 $documentationhtml .= html_writer::end_tag('span');
463             }
464             $documentationhtml .= $br.$br;
467         /// function response documentation
468             $documentationhtml .= html_writer::start_tag('span', array('style' => 'color:#EA33A6'));
469             $documentationhtml .= get_string('response', 'webservice');
470             $documentationhtml .= html_writer::end_tag('span');
471             $documentationhtml .= $br;
472             /// function response description
473             $documentationhtml .= html_writer::start_tag('span', array('style' => 'font-size:80%'));
474             if (!empty($description->returns_desc->desc)) {
475                 $documentationhtml .= $description->returns_desc->desc;
476                 $documentationhtml .= $br.$br;
477             }
478             if (!empty($description->returns_desc)) {
479                 ///general structure of the response
480                 $documentationhtml .= $this->colored_box_with_pre_tag(get_string('generalstructure', 'webservice'), 
481                                                                       $this->detailed_description_html($description->returns_desc),
482                                                                       'FFF1BC');
483                 ///xml-rpc structure of the response in PHP format
484                 if (!empty($activatedprotocol['xmlrpc'])) {
485                      $documentationhtml .= $this->colored_box_with_pre_tag(get_string('phpresponse', 'webservice'),
486                                                                            htmlentities($this->xmlrpc_param_description_html($description->returns_desc)),
487                                                                            'DFEEE7');
488                 }
489                 ///XML response for the REST protocol
490                 if (!empty($activatedprotocol['rest'])) {
491                     $restresponse  = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>".$brakeline."<RESPONSE>".$brakeline;
492                     $restresponse .= $this->description_in_indented_xml_format($description->returns_desc);
493                     $restresponse .="</RESPONSE>".$brakeline;
494                     $documentationhtml .= $this->colored_box_with_pre_tag(get_string('restcode', 'webservice'), 
495                                                                           htmlentities($restresponse),
496                                                                           'FEEBE5');
497                 }
498             }
499             $documentationhtml .= html_writer::end_tag('span');
500             $documentationhtml .= $br.$br;
502        /// function errors documentation for REST protocol
503             if (!empty($activatedprotocol['rest'])) {
504                 $documentationhtml .= html_writer::start_tag('span', array('style' => 'color:#EA33A6'));
505                 $documentationhtml .= get_string('errorcodes', 'webservice');
506                 $documentationhtml .= html_writer::end_tag('span');
507                 $documentationhtml .= $br.$br;
508                 $documentationhtml .= html_writer::start_tag('span', array('style' => 'font-size:80%'));
509                 $errormessage = get_string('invalidparameter', 'debug');
510                 $restexceptiontext =<<<EOF
511 <?xml version="1.0" encoding="UTF-8"?>
512 <EXCEPTION class="invalid_parameter_exception">
513     <MESSAGE>{$errormessage}</MESSAGE>
514     <DEBUGINFO></DEBUGINFO>
515 </EXCEPTION>
516 EOF;
517                 $documentationhtml .= $this->colored_box_with_pre_tag(get_string('restexception', 'webservice'), 
518                                                                       htmlentities($restexceptiontext),
519                                                                       'FEEBE5');
521             $documentationhtml .= html_writer::end_tag('span');
522             }
523             $documentationhtml .= $br.$br;
524             if (empty($printableformat)) {
525                 $documentationhtml .= print_collapsible_region_end(true);
526             }
527         }
529      /// close the table and return the documentation
530         $documentationhtml .= html_writer::end_tag('td');
531         $documentationhtml .= html_writer::end_tag('tr');
532         $documentationhtml .= html_writer::end_tag('table');
534         return $documentationhtml;
536     }
538     /**
539      * Return the login page html
540      * @param string $errormessage - the error message to display
541      * @return string the html to diplay
542      */
543     public function login_page_html($errormessage) {
544         global $CFG, $OUTPUT;
546         $br = html_writer::empty_tag('br', array());
548         $htmlloginpage = html_writer::start_tag('table', array('style' => "margin-left:auto; margin-right:auto;"));
549         $htmlloginpage .= html_writer::start_tag('tr', array());
550         $htmlloginpage .= html_writer::start_tag('td', array());
552 //        /// Display detailed error message when can't login
553 //        $htmlloginpage .= get_string('error','webservice',$errormessage);
554 //        $htmlloginpage .= html_writer::empty_tag('br', array());
555 //        $htmlloginpage .= html_writer::empty_tag('br', array());
557         //login form - we cannot use moodle form as we don't have sessionkey
558         $target = new moodle_url('/webservice/wsdoc.php', array()); // Required
560         $contents = get_string('entertoken', 'webservice');
561         $contents .= $br.$br;
562         $contents .= html_writer::empty_tag('input', array('type'=>'text', 'name'=>'token', 'style'=>'width: 30em;'));
563         
564         $contents .= $br.$br;
565         $contents .= get_string('wsdocumentationlogin', 'webservice');
566         $contents .= $br.$br;
567         $contents .= html_writer::empty_tag('input', array('type'=>'text', 'name'=>'wsusername', 'style'=>'width: 30em;', 'value'=>get_string('wsusername', 'webservice')));
568         $contents .= $br.$br;
569         $contents .= html_writer::empty_tag('input', array('type'=>'text', 'name'=>'wspassword', 'style'=>'width: 30em;', 'value'=>get_string('wspassword', 'webservice')));
570         $contents .= $br.$br;
571         $contents .= html_writer::empty_tag('input', array('type'=>'submit', 'name'=>'submit', 'value'=>get_string('wsdocumentation', 'webservice')));
572         
573         $htmlloginpage .= html_writer::tag('form', "<div>$contents</div>", array('method'=>'post', 'target'=>$target));
575         $htmlloginpage .= html_writer::end_tag('td');
576         $htmlloginpage .= html_writer::end_tag('tr');
577         $htmlloginpage .= html_writer::end_tag('table');
579         return $htmlloginpage;
581     }