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   1  <?php
   2  
   3  // This file is part of Moodle - http://moodle.org/
   4  //
   5  // Moodle is free software: you can redistribute it and/or modify
   6  // it under the terms of the GNU General Public License as published by
   7  // the Free Software Foundation, either version 3 of the License, or
   8  // (at your option) any later version.
   9  //
  10  // Moodle is distributed in the hope that it will be useful,
  11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  // GNU General Public License for more details.
  14  //
  15  // You should have received a copy of the GNU General Public License
  16  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17  
  18  
  19  /**
  20   * Page to allow the administrator to configure networked hosts, and add new ones
  21   *
  22   * @package    core
  23   * @subpackage mnet
  24   * @copyright  2007 Donal McMullan
  25   * @copyright  2007 Martin Langhoff
  26   * @copyright  2010 Penny Leach
  27   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  28   */
  29  
  30  require(__DIR__.'/../../config.php');
  31  require_once($CFG->libdir.'/adminlib.php');
  32  require_once($CFG->dirroot.'/mnet/lib.php');
  33  require_once($CFG->dirroot.'/'.$CFG->admin.'/mnet/peer_forms.php');
  34  
  35  require_login();
  36  
  37  $context = context_system::instance();
  38  require_capability('moodle/site:config', $context, $USER->id, true, 'nopermissions');
  39  
  40  /// Initialize variables.
  41  $hostid = optional_param('hostid', 0, PARAM_INT);
  42  $updra = optional_param('updateregisterall', 0, PARAM_INT);
  43  
  44  // first process the register all hosts setting if required
  45  if (!empty($updra)) {
  46      set_config('mnet_register_allhosts', optional_param('registerallhosts', 0, PARAM_INT));
  47      redirect(new moodle_url('/admin/mnet/peers.php'), get_string('changessaved'));
  48  }
  49  
  50  $adminsection = 'mnetpeers';
  51  if ($hostid && $DB->get_field('mnet_host', 'deleted', array('id' => $hostid)) != 1) {
  52      $adminsection = 'mnetpeer' . $hostid;
  53  }
  54  
  55  $PAGE->set_url('/admin/mnet/peers.php');
  56  admin_externalpage_setup($adminsection);
  57  
  58  if (!extension_loaded('openssl')) {
  59      print_error('requiresopenssl', 'mnet');
  60  }
  61  
  62  if (!function_exists('curl_init') ) {
  63      print_error('nocurl', 'mnet');
  64  }
  65  
  66  if (!function_exists('xmlrpc_encode_request')) {
  67      print_error('xmlrpc-missing', 'mnet');
  68  }
  69  
  70  if (!isset($CFG->mnet_dispatcher_mode)) {
  71      set_config('mnet_dispatcher_mode', 'off');
  72  }
  73  
  74  $mnet_peer = new mnet_peer();
  75  $simpleform = new mnet_simple_host_form(); // the one that goes on the bottom of the main page
  76  $reviewform = null; // set up later in different code branches, so mnet_peer can be passed to the constructor
  77  
  78  // if the first form has been submitted, bootstrap the peer and load up the review form
  79  if ($formdata = $simpleform->get_data()) {
  80      // ensure we remove trailing slashes
  81      $formdata->wwwroot = trim($formdata->wwwroot);
  82      $formdata->wwwroot = rtrim($formdata->wwwroot, '/');
  83  
  84      // ensure the wwwroot starts with a http or https prefix
  85      if (strtolower(substr($formdata->wwwroot, 0, 4)) != 'http') {
  86          $formdata->wwwroot = 'http://'.$formdata->wwwroot;
  87      }
  88  
  89      $mnet_peer->set_applicationid($formdata->applicationid);
  90      $application = $DB->get_field('mnet_application', 'name', array('id'=>$formdata->applicationid));
  91      $mnet_peer->bootstrap($formdata->wwwroot, null, $application);
  92      // bootstrap the second form straight with the data from the first form
  93      $reviewform = new mnet_review_host_form(null, array('peer' => $mnet_peer)); // the second step (also the edit host form)
  94      $formdata->oldpublickey = $mnet_peer->public_key; // set this so we can confirm on form post without having to recreate the mnet_peer object
  95      $reviewform->set_data($mnet_peer);
  96      echo $OUTPUT->header();
  97      echo $OUTPUT->box_start();
  98      $reviewform->display();
  99      echo $OUTPUT->box_end();
 100      echo $OUTPUT->footer();
 101      exit;
 102  } else if ($simpleform->is_submitted()) { // validation failed
 103      $noreviewform = true;
 104  }
 105  
 106  // editing a host - load up the review form
 107  if (!empty($hostid)) {
 108      // TODO print a nice little heading
 109      $mnet_peer->set_id($hostid);
 110      echo $OUTPUT->header();
 111      $currenttab = 'mnetdetails';
 112      require_once($CFG->dirroot . '/admin/mnet/tabs.php');
 113  
 114      if ($hostid != $CFG->mnet_all_hosts_id) {
 115          $mnet_peer->currentkey = mnet_get_public_key($mnet_peer->wwwroot, $mnet_peer->application);
 116          if ($mnet_peer->currentkey == $mnet_peer->public_key) {
 117              unset($mnet_peer->currentkey);
 118          } else {
 119              error_log($mnet_peer->currentkey);
 120              error_log($mnet_peer->public_key);
 121              error_log(md5($mnet_peer->currentkey));
 122              error_log(md5($mnet_peer->public_key));
 123          }
 124          $credentials = $mnet_peer->check_credentials($mnet_peer->public_key);
 125          $reviewform = new mnet_review_host_form(null, array('peer' => $mnet_peer)); // the second step (also the edit host form)
 126          $mnet_peer->oldpublickey = $mnet_peer->public_key; // set this so we can confirm on form post without having to recreate the mnet_peer object
 127          $reviewform->set_data((object)$mnet_peer);
 128          echo $OUTPUT->box_start();
 129          $reviewform->display();
 130          echo $OUTPUT->box_end();
 131      } else {
 132          // no options for allhosts host - just let the tabs display and print a notification
 133          echo $OUTPUT->notification(get_string('allhosts_no_options', 'mnet'));
 134      }
 135      echo $OUTPUT->footer();
 136      exit;
 137  }
 138  
 139  // either we're in the second step of setting up a new host
 140  // or editing an existing host
 141  // try our best to set up the mnet_peer object to pass to the form definition
 142  // unless validation on simpleform failed, in which case fall through.
 143  if (empty($noreviewform) && $id = optional_param('id', 0, PARAM_INT)) {
 144      // we're editing an existing one, so set up the tabs
 145      $currenttab = 'mnetdetails';
 146      $mnet_peer->set_id($id);
 147      require_once($CFG->dirroot . '/admin/mnet/tabs.php');
 148  } else if (empty($noreviewform) && ($wwwroot = optional_param('wwwroot', '', PARAM_URL)) && ($applicationid = optional_param('applicationid', 0, PARAM_INT))) {
 149      $application = $DB->get_field('mnet_application', 'name', array('id'=>$applicationid));
 150      $mnet_peer->bootstrap($wwwroot, null, $application);
 151  }
 152  $reviewform = new mnet_review_host_form(null, array('peer' => $mnet_peer));
 153  if ($formdata = $reviewform->get_data()) {
 154  
 155      $mnet_peer->set_applicationid($formdata->applicationid);
 156      $application = $DB->get_field('mnet_application', 'name', array('id'=>$formdata->applicationid));
 157      $mnet_peer->bootstrap($formdata->wwwroot, null, $application);
 158  
 159      if (!empty($formdata->name) && $formdata->name != $mnet_peer->name) {
 160          $mnet_peer->set_name($formdata->name);
 161      }
 162  
 163      if (empty($formdata->theme)) {
 164          $mnet_peer->force_theme = 0;
 165          $mnet_peer->theme = null;
 166      } else {
 167          $mnet_peer->force_theme = 1;
 168          $mnet_peer->theme = $formdata->theme;
 169      }
 170  
 171      $mnet_peer->deleted             = $formdata->deleted;
 172      $mnet_peer->public_key          = $formdata->public_key;
 173      $credentials                    = $mnet_peer->check_credentials($mnet_peer->public_key);
 174      $mnet_peer->public_key_expires  = $credentials['validTo_time_t'];
 175      $mnet_peer->sslverification     = $formdata->sslverification;
 176  
 177      if ($mnet_peer->commit()) {
 178          redirect(new moodle_url('/admin/mnet/peers.php', array('hostid' => $mnet_peer->id)), get_string('changessaved'));
 179      } else {
 180          print_error('invalidaction', 'error', 'index.php');
 181      }
 182  } else if ($reviewform->is_submitted()) { // submitted, but errors
 183      echo $OUTPUT->header();
 184      echo $OUTPUT->box_start();
 185      $reviewform->display();
 186      echo $OUTPUT->box_end();
 187      echo $OUTPUT->footer();
 188      exit;
 189  }
 190  
 191  
 192  // normal flow - just display all hosts with links
 193  echo $OUTPUT->header();
 194  $hosts = mnet_get_hosts(true);
 195  
 196  // print the table to display the register all hosts setting
 197  $table = new html_table();
 198  $table->head = array(get_string('registerallhosts', 'mnet'));
 199  
 200  $registerrow = '';
 201  $registerstr = '';
 202  $registerurl = new moodle_url('/admin/mnet/peers.php', array('updateregisterall' => 1));
 203  if (!empty($CFG->mnet_register_allhosts)) {
 204      $registerrow = get_string('registerhostson', 'mnet');
 205      $registerurl->param('registerallhosts', 0);
 206      $registerstr = get_string('turnitoff', 'mnet');
 207  } else {
 208      $registerrow = get_string('registerhostsoff', 'mnet');
 209      $registerurl->param('registerallhosts', 1);
 210      $registerstr = get_string('turniton', 'mnet');
 211  }
 212  $registerrow .= $OUTPUT->single_button($registerurl, $registerstr);
 213  
 214  // simple table with two rows of a single cell
 215  $table->data = array(
 216      array(
 217          get_string('registerallhostsexplain', 'mnet'),
 218      ),
 219      array(
 220          $registerrow
 221      ),
 222  );
 223  echo html_writer::table($table);
 224  
 225  // print the list of all hosts, with little action links and buttons
 226  $table = new html_table();
 227  $table->head = array(
 228      get_string('site'),
 229      get_string('system', 'mnet'),
 230      get_string('last_connect_time', 'mnet'),
 231      '',
 232  );
 233  $table->wrap = array('nowrap', 'nowrap', 'nowrap', 'nowrap');
 234  $baseurl = new moodle_url('/admin/mnet/peers.php');
 235  $deleted = array();
 236  foreach($hosts as $host) {
 237      $hosturl = new moodle_url($baseurl, array('hostid' => $host->id));
 238      if (trim($host->name) === '') {
 239          // should not happen but...
 240          $host->name = '???';
 241      }
 242      // process all hosts first since it's the easiest
 243      if ($host->id == $CFG->mnet_all_hosts_id) {
 244          $table->data[] = array(html_writer::link($hosturl, get_string('allhosts', 'core_mnet')), '*', '', '');
 245          continue;
 246      }
 247  
 248      // populate the list of deleted hosts
 249      if ($host->deleted) {
 250          $deleted[] = html_writer::link($hosturl, $host->name);
 251          continue;
 252      }
 253  
 254      if ($host->last_connect_time == 0) {
 255          $last_connect = get_string('never');
 256      } else {
 257          $last_connect = userdate($host->last_connect_time, get_string('strftimedatetime', 'core_langconfig'));
 258      }
 259      $table->data[] = array(
 260          html_writer::link($hosturl, $host->name),
 261          html_writer::link($host->wwwroot, $host->wwwroot),
 262          $last_connect,
 263          $OUTPUT->single_button(new moodle_url('/admin/mnet/delete.php', array('hostid' => $host->id)), get_string('delete'))
 264      );
 265  }
 266  echo html_writer::table($table);
 267  
 268  if ($deleted) {
 269      echo $OUTPUT->box(get_string('deletedhosts', 'core_mnet', join(', ', $deleted)), 'deletedhosts');
 270  }
 271  
 272  // finally, print the initial form to add a new host
 273  echo $OUTPUT->box_start();
 274  echo $OUTPUT->heading(get_string('addnewhost', 'mnet'), 3);
 275  $simpleform->display();
 276  echo $OUTPUT->box_end();
 277  
 278  // done
 279  echo $OUTPUT->footer();
 280  exit;
 281