course/index.php

   1 <?php // $Id$
   2       // For most people, just lists the course categories
   3       // Allows the admin to create, delete and rename course categories
   4
   5     require_once("../config.php");
   6     require_once("lib.php");
   7
   8     $categoryedit = optional_param('categoryedit', -1,PARAM_BOOL);
   9     $delete   = optional_param('delete',0,PARAM_INT);
  10     $hide     = optional_param('hide',0,PARAM_INT);
  11     $show     = optional_param('show',0,PARAM_INT);
  12     $move     = optional_param('move',0,PARAM_INT);
  13     $moveto   = optional_param('moveto',-1,PARAM_INT);
  14     $moveup   = optional_param('moveup',0,PARAM_INT);
  15     $movedown = optional_param('movedown',0,PARAM_INT);
  16
  17     $sysctx  = get_context_instance(CONTEXT_SYSTEM);
  18     $context = $sysctx;
  19
  20     if (!$site = get_site()) {
  21         error('Site isn\'t defined!');
  22     }
  23
  24     if ($CFG->forcelogin) {
  25         require_login();
  26     }
  27
  28     if (has_capability('moodle/category:update', $sysctx)) {
  29         if ($categoryedit !== -1) {
  30             $USER->categoryediting = $categoryedit;
  31         }
  32         $adminediting = !empty($USER->categoryediting);
  33     } else {
  34         $adminediting = false;
  35     }
  36
  37     $stradministration = get_string('administration');
  38     $strcategories = get_string('categories');
  39     $strcategory = get_string('category');
  40     $strcourses = get_string('courses');
  41     $stredit = get_string('edit');
  42     $strdelete = get_string('delete');
  43     $straction = get_string('action');
  44
  45
  46 /// Unless it's an editing admin, just print the regular listing of courses/categories
  47
  48     if (!$adminediting) {
  49
  50       /// Print form for creating new categories
  51
  52         $countcategories = count_records('course_categories');
  53
  54         if ($countcategories > 1 || ($countcategories == 1 && count_records('course') > 200)) {
  55             $strcourses = get_string('courses');
  56             $strcategories = get_string('categories');
  57
  58             $navlinks = array();
  59             $navlinks[] = array('name'=>$strcategories,'link'=>'','type'=>'misc');
  60             $navigation = build_navigation($navlinks);
  61             print_header("$site->shortname: $strcategories", $strcourses, $navigation, '', '', true, update_categories_button());
  62             print_heading($strcategories);
  63             echo skip_main_destination();
  64             print_box_start('categorybox');
  65             print_whole_category_list();
  66             print_box_end();
  67             print_course_search();
  68         } else {
  69             $strfulllistofcourses = get_string('fulllistofcourses');
  70             print_header("$site->shortname: $strfulllistofcourses", $strfulllistofcourses,
  71                     build_navigation(array(array('name'=>$strfulllistofcourses, 'link'=>'','type'=>'misc'))),
  72                          '', '', true, update_categories_button());
  73             echo skip_main_destination();
  74             print_box_start('courseboxes');
  75             print_courses(0);
  76             print_box_end();
  77         }
  78
  79         /// I am not sure this context in the next has_capability call is correct.
  80         if (isloggedin() and !isguest() and !has_capability('moodle/course:create', $sysctx) and $CFG->enablecourserequests) {  // Print link to request a new course
  81             print_single_button('request.php', NULL, get_string('courserequest'), 'get');
  82         }
  83         if (has_capability('moodle/course:create', $sysctx)) {       // Print link to create a new course
  84         /// Get the 1st available category
  85             $options = array('category' => get_field('course_categories', 'id', 'parent', '0'));
  86             print_single_button('edit.php', $options, get_string('addnewcourse'), 'get');
  87         }
  88         if (has_capability('moodle/site:approvecourse', $sysctx)  and !empty($CFG->enablecourserequests)) {
  89             print_single_button('pending.php',NULL, get_string('coursespending'),'get');
  90         }
  91         print_footer();
  92         exit;
  93     }
  94
  95 /// From now on is all the admin/course creator functions
  96
  97 /// Delete a category if necessary
  98
  99     if (!empty($delete) and confirm_sesskey()) {
 100         require_once('delete_category_form.php');
 101
 102         if (!$deletecat = get_record('course_categories', 'id', $delete)) {
 103             error('Incorrect category id', 'index.php');
 104         }
 105
 106         $heading = get_string('deletecategory', '', format_string($deletecat->name));
 107
 108         $context = get_context_instance(CONTEXT_COURSECAT, $delete);
 109         require_capability('moodle/category:delete', $context);
 110
 111         $mform = new delete_category_form(null, $deletecat);
 112         $mform->set_data(array('delete'=>$delete));
 113
 114         if ($mform->is_cancelled()) {
 115             redirect('index.php');
 116
 117         } else if (!$data= $mform->get_data(false)) {
 118             require_once($CFG->libdir . '/questionlib.php');
 119             print_category_edit_header();
 120             print_heading($heading);
 121             print_box(get_string('deletecategorycheck2'), 'generalbox boxwidthnormal boxaligncenter');
 122             if (question_context_has_any_questions($context)) {
 123                 print_box(get_string('deletecoursecategorywithquestions', 'question'),
 124                         'generalbox boxwidthnormal boxaligncenter');
 125             }
 126             $mform->display();
 127             print_footer();
 128             exit();
 129         }
 130
 131         print_category_edit_header();
 132         print_heading($heading);
 133
 134         if ($data->fulldelete) {
 135             category_delete_full($deletecat, true);
 136         } else {
 137             category_delete_move($deletecat, $data->newparent, true);
 138         }
 139
 140         print_continue('index.php');
 141
 142         print_footer();
 143         die;
 144     }
 145
 146 /// Print headings
 147     print_category_edit_header();
 148     print_heading($strcategories);
 149
 150
 151 /// Create a default category if necessary
 152     if (!$categories = get_categories()) {    /// No category yet!
 153         // Try and make one
 154         unset($tempcat);
 155         $tempcat->name = get_string('miscellaneous');
 156         if (!$tempcat->id = insert_record('course_categories', $tempcat)) {
 157             error('Serious error: Could not create a default category!');
 158         }
 159         $tempcat->context = get_context_instance(CONTEXT_COURSECAT, $tempcat->id);
 160         mark_context_dirty('/'.SYSCONTEXTID);
 161     }
 162
 163
 164 /// Move a category to a new parent if required
 165
 166     if (!empty($move) and ($moveto>=0) and confirm_sesskey()) {
 167         if ($tempcat = get_record('course_categories', 'id', $move)) {
 168             if ($tempcat->parent != $moveto) {
 169                 $newp = get_record('course_categories', 'id', $moveto);
 170                 if (! move_category($tempcat, $newp)) {
 171                     notify('Could not update that category!');
 172                 }
 173             }
 174         }
 175     }
 176
 177
 178 /// Hide or show a category
 179     if ((!empty($hide) or !empty($show)) and confirm_sesskey()) {
 180         if (!empty($hide)) {
 181             $tempcat = get_record('course_categories', 'id', $hide);
 182             $visible = 0;
 183         } else {
 184             $tempcat = get_record('course_categories', 'id', $show);
 185             $visible = 1;
 186         }
 187         if ($tempcat) {
 188             if (! set_field('course_categories', 'visible', $visible, 'id', $tempcat->id)) {
 189                 notify('Could not update that category!');
 190             }
 191             if (! set_field('course', 'visible', $visible, 'category', $tempcat->id)) {
 192                 notify('Could not hide/show any courses in this category !');
 193             }
 194         }
 195     }
 196
 197
 198 /// Move a category up or down
 199
 200     if ((!empty($moveup) or !empty($movedown)) and confirm_sesskey()) {
 201
 202         $swapcategory = NULL;
 203         $movecategory = NULL;
 204
 205         if (!empty($moveup)) {
 206             if ($movecategory = get_record('course_categories', 'id', $moveup)) {
 207                 $categories = get_categories($movecategory->parent);
 208
 209                 foreach ($categories as $category) {
 210                     if ($category->id == $movecategory->id) {
 211                         break;
 212                     }
 213                     $swapcategory = $category;
 214                 }
 215                 unset($category);
 216             }
 217         }
 218         if (!empty($movedown)) {
 219             if ($movecategory = get_record('course_categories', 'id', $movedown)) {
 220                 $categories = get_categories($movecategory->parent);
 221
 222                 $choosenext = false;
 223                 foreach ($categories as $category) {
 224                     if ($choosenext) {
 225                         $swapcategory = $category;
 226                         break;
 227                     }
 228                     if ($category->id == $movecategory->id) {
 229                         $choosenext = true;
 230                     }
 231                 }
 232                 unset($category);
 233             }
 234         }
 235         if ($swapcategory and $movecategory) {        // Renumber everything for robustness
 236             $count=0;
 237             foreach ($categories as $category) {
 238                 $count++;
 239                 if ($category->id == $swapcategory->id) {
 240                     $category = $movecategory;
 241                 } else if ($category->id == $movecategory->id) {
 242                     $category = $swapcategory;
 243                 }
 244                 if (! set_field('course_categories', 'sortorder', $count, 'id', $category->id)) {
 245                     notify('Could not update that category!');
 246                 }
 247             }
 248             unset($category);
 249         }
 250     }
 251
 252 /// Find any orphan courses that don't yet have a valid category and set to default
 253     fix_coursecategory_orphans();
 254
 255 /// Should be a no-op 99% of the cases
 256     fix_course_sortorder();
 257
 258 /// Print out the categories with all the knobs
 259
 260     $strcategories = get_string('categories');
 261     $strcourses = get_string('courses');
 262     $strmovecategoryto = get_string('movecategoryto');
 263     $stredit = get_string('edit');
 264
 265     $displaylist = array();
 266     $parentlist = array();
 267
 268     $displaylist[0] = get_string('top');
 269     make_categories_list($displaylist, $parentlist, '');
 270
 271     echo '<table class="generalbox editcourse boxaligncenter"><tr class="header">';
 272     echo '<th class="header" scope="col">'.$strcategories.'</th>';
 273     echo '<th class="header" scope="col">'.$strcourses.'</th>';
 274     echo '<th class="header" scope="col">'.$stredit.'</th>';
 275     echo '<th class="header" scope="col">'.$strmovecategoryto.'</th>';
 276     echo '</tr>';
 277
 278     print_category_edit(NULL, $displaylist, $parentlist);
 279
 280     echo '</table>';
 281
 282     echo '<div class="buttons">';
 283
 284     if (!empty($category->id)) {
 285         // Print link to create a new course in current category
 286         if (has_capability('moodle/course:create', $context)) {
 287             $options = array();
 288             $options['category'] = $category->id;
 289             print_single_button('edit.php', $options, get_string('addnewcourse'), 'get');
 290         }
 291     }else{
 292         if (has_capability('moodle/course:create', $sysctx)) {
 293             // print create course link to first category
 294             $options = array();
 295             $options = array('category' => get_field('course_categories', 'id', 'parent', '0'));
 296             print_single_button('edit.php', $options, get_string('addnewcourse'), 'get');
 297         }
 298     }
 299
 300     // Print button for creating new categories
 301     if (has_capability('moodle/category:create', $context)) {
 302         unset($options);
 303         if (!empty($category->id)) {
 304             $options['id'] = $category->id;
 305         } else {
 306             $options['id'] = 0;
 307         }
 308         $options['categoryadd'] = 1;
 309         print_single_button('editcategory.php', $options, get_string('addnewcategory'), 'get');
 310     }
 311
 312     if (has_capability('moodle/site:approvecourse', $sysctx)  and !empty($CFG->enablecourserequests)) {
 313         print_single_button('pending.php',NULL, get_string('coursespending'), 'get');
 314     }
 315     // admin page does not allow custom buttons in the navigation bar
 316     echo '<div class="singlebutton">';
 317     echo update_categories_button();
 318     echo '</div></div>';
 319
 320     print_footer();
 321
 322 function print_category_edit($category, $displaylist, $parentslist, $depth=-1, $up=false, $down=false) {
 323 /// Recursive function to print all the categories ready for editing
 324
 325     global $CFG, $USER;
 326
 327     static $str = '';
 328
 329     if (empty($str)) {
 330         $str->edit     = get_string('edit');
 331         $str->delete   = get_string('delete');
 332         $str->moveup   = get_string('moveup');
 333         $str->movedown = get_string('movedown');
 334         $str->edit     = get_string('editthiscategory');
 335         $str->hide     = get_string('hide');
 336         $str->show     = get_string('show');
 337     }
 338
 339     if ($category) {
 340
 341         if (!isset($category->context)) {
 342             $category->context = get_context_instance(CONTEXT_COURSECAT, $category->id);
 343         }
 344
 345         echo '<tr><td align="left" class="name">';
 346         for ($i=0; $i<$depth;$i++) {
 347             echo '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 348         }
 349         $linkcss = $category->visible ? '' : ' class="dimmed" ';
 350         echo '<a '.$linkcss.' title="'.$str->edit.'" '.
 351              ' href="category.php?id='.$category->id.'&amp;categoryedit=on&amp;sesskey='.sesskey().'">'.
 352              format_string($category->name).'</a>';
 353         echo '</td>';
 354
 355         echo '<td class="count">'.$category->coursecount.'</td>';
 356
 357         echo '<td class="icons">';    /// Print little icons
 358
 359         if (has_capability('moodle/category:update', $category->context)) {
 360             echo '<a title="'.$str->edit.'" href="editcategory.php?id='.$category->id.'&amp;sesskey='.sesskey().'"><img'.
 361                  ' src="'.$CFG->pixpath.'/t/edit.gif" class="iconsmall" alt="'.$str->edit.'" /></a> ';
 362         }
 363
 364         if (has_capability('moodle/category:delete', $category->context)) {
 365             echo '<a title="'.$str->delete.'" href="index.php?delete='.$category->id.'&amp;sesskey='.sesskey().'"><img'.
 366                  ' src="'.$CFG->pixpath.'/t/delete.gif" class="iconsmall" alt="'.$str->delete.'" /></a> ';
 367         }
 368
 369         if (has_capability('moodle/category:visibility', $category->context)) {
 370             if (!empty($category->visible)) {
 371                 echo '<a title="'.$str->hide.'" href="index.php?hide='.$category->id.'&amp;sesskey='.sesskey().'"><img'.
 372                      ' src="'.$CFG->pixpath.'/t/hide.gif" class="iconsmall" alt="'.$str->hide.'" /></a> ';
 373             } else {
 374                 echo '<a title="'.$str->show.'" href="index.php?show='.$category->id.'&amp;sesskey='.sesskey().'"><img'.
 375                      ' src="'.$CFG->pixpath.'/t/show.gif" class="iconsmall" alt="'.$str->show.'" /></a> ';
 376             }
 377         }
 378
 379         if ($up) {
 380             echo '<a title="'.$str->moveup.'" href="index.php?moveup='.$category->id.'&amp;sesskey='.sesskey().'"><img'.
 381                  ' src="'.$CFG->pixpath.'/t/up.gif" class="iconsmall" alt="'.$str->moveup.'" /></a> ';
 382         }
 383         if ($down) {
 384             echo '<a title="'.$str->movedown.'" href="index.php?movedown='.$category->id.'&amp;sesskey='.sesskey().'"><img'.
 385                  ' src="'.$CFG->pixpath.'/t/down.gif" class="iconsmall" alt="'.$str->movedown.'" /></a> ';
 386         }
 387         echo '</td>';
 388
 389         echo '<td align="left">';
 390         $tempdisplaylist = $displaylist;
 391         unset($tempdisplaylist[$category->id]);
 392         foreach ($parentslist as $key => $parents) {
 393             if (in_array($category->id, $parents)) {
 394                 unset($tempdisplaylist[$key]);
 395             }
 396         }
 397         popup_form ("index.php?move=$category->id&amp;sesskey=$USER->sesskey&amp;moveto=", $tempdisplaylist, "moveform$category->id", $category->parent, '', '', '', false);
 398         echo '</td>';
 399         echo '</tr>';
 400     } else {
 401         $category->id = '0';
 402     }
 403
 404     if ($categories = get_categories($category->id)) {   // Print all the children recursively
 405         $countcats = count($categories);
 406         $count = 0;
 407         $first = true;
 408         $last = false;
 409         foreach ($categories as $cat) {
 410             $count++;
 411             if ($count == $countcats) {
 412                 $last = true;
 413             }
 414             $up = $first ? false : true;
 415             $down = $last ? false : true;
 416             $first = false;
 417
 418             print_category_edit($cat, $displaylist, $parentslist, $depth+1, $up, $down);
 419         }
 420     }
 421 }
 422
 423 function print_category_edit_header() {
 424     global $CFG;
 425     global $SITE;
 426
 427     if (has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {
 428         require_once($CFG->libdir.'/adminlib.php');
 429         admin_externalpage_setup('coursemgmt');
 430         admin_externalpage_print_header();
 431     } else {
 432         print_header("$SITE->shortname:". get_string('categories'), get_string('courses'),
 433             build_navigation(array(array('name'=>get_string('categories'),'link'=>'','type'=>'misc'))), '', '', true, update_categories_button());
 434     }
 435 }
 436 ?>