course/mod.php

   1 <?php // $Id$
   2
   3 //  Moves, adds, updates, duplicates or deletes modules in a course
   4
   5     require("../config.php");
   6     require("lib.php");
   7
   8     require_login();
   9
  10     $sectionreturn = optional_param('sr', '', PARAM_INT);
  11
  12     if (isset($SESSION->modform)) {   // Variables are stored in the session
  13         $mod = $SESSION->modform;
  14         unset($SESSION->modform);
  15     } else {
  16         $mod = (object)$_POST;
  17     }
  18
  19     if (isset($cancel)) {
  20         if (!empty($SESSION->returnpage)) {
  21             $return = $SESSION->returnpage;
  22             unset($SESSION->returnpage);
  23             redirect($return);
  24         } else {
  25             redirect("view.php?id=$mod->course#$sectionreturn");
  26         }
  27     }
  28
  29
  30     if (isset($_POST["course"]) and confirm_sesskey()) {    // add or update form submitted
  31
  32         if (!$course = get_record("course", "id", $mod->course)) {
  33             error("This course doesn't exist");
  34         }
  35
  36         if (!isteacheredit($course->id)) {
  37             error("You can't modify this course!");
  38         }
  39
  40         $mod->modulename = clean_filename($mod->modulename);  // For safety
  41         $modlib = "$CFG->dirroot/mod/$mod->modulename/lib.php";
  42
  43         if (file_exists($modlib)) {
  44             include_once($modlib);
  45         } else {
  46             error("This module is missing important code! ($modlib)");
  47         }
  48         $addinstancefunction    = $mod->modulename."_add_instance";
  49         $updateinstancefunction = $mod->modulename."_update_instance";
  50         $deleteinstancefunction = $mod->modulename."_delete_instance";
  51         $moderr = "$CFG->dirroot/mod/$mod->modulename/moderr.html";
  52
  53         switch ($mod->mode) {
  54             case "update":
  55
  56                 if (isset($mod->name)) {
  57                     if (trim($mod->name) == '') {
  58                         unset($mod->name);
  59                     }
  60                 }
  61
  62                 $return = $updateinstancefunction($mod);
  63                 if (!$return) {
  64                     if (file_exists($moderr)) {
  65                         $form = $mod;
  66                         include_once($moderr);
  67                         die;
  68                     }
  69                     error("Could not update the $mod->modulename", "view.php?id=$course->id");
  70                 }
  71
  72                 if (isset($mod->visible)) {
  73                     set_coursemodule_visible($mod->coursemodule, $mod->visible);
  74                 }
  75
  76                 if (isset($mod->groupmode)) {
  77                     set_coursemodule_groupmode($mod->coursemodule, $mod->groupmode);
  78                 }
  79
  80                 if (is_string($return)) {
  81                     error($return, "view.php?id=$course->id");
  82                 }
  83
  84                 if (isset($mod->redirect)) {
  85                     $SESSION->returnpage = $mod->redirecturl;
  86                 } else {
  87                     $SESSION->returnpage = "$CFG->wwwroot/mod/$mod->modulename/view.php?id=$mod->coursemodule";
  88                 }
  89
  90                 add_to_log($course->id, "course", "update mod",
  91                            "../mod/$mod->modulename/view.php?id=$mod->coursemodule",
  92                            "$mod->modulename $mod->instance");
  93                 add_to_log($course->id, $mod->modulename, "update",
  94                            "view.php?id=$mod->coursemodule",
  95                            "$mod->instance", $mod->coursemodule);
  96                 break;
  97
  98             case "add":
  99
 100                 if (trim($mod->name) == '') {
 101                     $mod->name = get_string("modulename", $mod->modulename);
 102                 }
 103
 104                 $return = $addinstancefunction($mod);
 105                 if (!$return) {
 106                     if (file_exists($moderr)) {
 107                         $form = $mod;
 108                         include_once($moderr);
 109                         die;
 110                     }
 111                     error("Could not add a new instance of $mod->modulename", "view.php?id=$course->id");
 112                 }
 113                 if (is_string($return)) {
 114                     error($return, "view.php?id=$course->id");
 115                 }
 116
 117                 if (!isset($mod->groupmode)) { // to deal with pre-1.5 modules
 118                     $mod->groupmode = $course->groupmode;  /// Default groupmode the same as course
 119                 }
 120
 121                 $mod->instance = $return;
 122
 123                 // course_modules and course_sections each contain a reference
 124                 // to each other, so we have to update one of them twice.
 125
 126                 if (! $mod->coursemodule = add_course_module($mod) ) {
 127                     error("Could not add a new course module");
 128                 }
 129                 if (! $sectionid = add_mod_to_section($mod) ) {
 130                     error("Could not add the new course module to that section");
 131                 }
 132
 133                 if (! set_field("course_modules", "section", $sectionid, "id", $mod->coursemodule)) {
 134                     error("Could not update the course module with the correct section");
 135                 }
 136
 137                 if (!isset($mod->visible)) {   // We get the section's visible field status
 138                     $mod->visible = get_field("course_sections","visible","id",$sectionid);
 139                 }
 140                 // make sure visibility is set correctly (in particular in calendar)
 141                 set_coursemodule_visible($mod->coursemodule, $mod->visible);
 142
 143                 if (isset($mod->redirect)) {
 144                     $SESSION->returnpage = $mod->redirecturl;
 145                 } else {
 146                     $SESSION->returnpage = "$CFG->wwwroot/mod/$mod->modulename/view.php?id=$mod->coursemodule";
 147                 }
 148
 149                 add_to_log($course->id, "course", "add mod",
 150                            "../mod/$mod->modulename/view.php?id=$mod->coursemodule",
 151                            "$mod->modulename $mod->instance");
 152                 add_to_log($course->id, $mod->modulename, "add",
 153                            "view.php?id=$mod->coursemodule",
 154                            "$mod->instance", $mod->coursemodule);
 155                 break;
 156
 157             case "delete":
 158                 if (! $deleteinstancefunction($mod->instance)) {
 159                     notify("Could not delete the $mod->modulename (instance)");
 160                 }
 161                 if (! delete_course_module($mod->coursemodule)) {
 162                     notify("Could not delete the $mod->modulename (coursemodule)");
 163                 }
 164                 if (! delete_mod_from_section($mod->coursemodule, "$mod->section")) {
 165                     notify("Could not delete the $mod->modulename from that section");
 166                 }
 167
 168                 unset($SESSION->returnpage);
 169
 170                 add_to_log($course->id, "course", "delete mod",
 171                            "view.php?id=$mod->course",
 172                            "$mod->modulename $mod->instance", $mod->coursemodule);
 173                 break;
 174             default:
 175                 error("No mode defined");
 176
 177         }
 178
 179         rebuild_course_cache($course->id);
 180
 181         if (!empty($SESSION->returnpage)) {
 182             $return = $SESSION->returnpage;
 183             unset($SESSION->returnpage);
 184             redirect($return);
 185         } else {
 186             redirect("view.php?id=$course->id#$sectionreturn");
 187         }
 188         exit;
 189     }
 190
 191     if ((isset($_GET['movetosection']) or isset($_GET['moveto'])) and confirm_sesskey()) {
 192
 193         if (! $cm = get_record("course_modules", "id", $USER->activitycopy)) {
 194             error("The copied course module doesn't exist!");
 195         }
 196
 197         if (isset($_GET['movetosection'])) {
 198             if (! $section = get_record("course_sections", "id", $_GET['movetosection'])) {
 199                 error("This section doesn't exist");
 200             }
 201             $beforecm = NULL;
 202
 203         } else {                      // normal moveto
 204             if (! $beforecm = get_record("course_modules", "id", $_GET['moveto'])) {
 205                 error("The destination course module doesn't exist");
 206             }
 207             if (! $section = get_record("course_sections", "id", $beforecm->section)) {
 208                 error("This section doesn't exist");
 209             }
 210         }
 211
 212         if (!isteacheredit($section->course)) {
 213             error("You can't modify this course!");
 214         }
 215
 216         if (!ismoving($section->course)) {
 217             error("You need to copy something first!");
 218         }
 219
 220         moveto_module($cm, $section, $beforecm);
 221
 222         unset($USER->activitycopy);
 223         unset($USER->activitycopycourse);
 224         unset($USER->activitycopyname);
 225
 226         rebuild_course_cache($section->course);
 227
 228         if (SITEID == $section->course) {
 229             redirect($CFG->wwwroot);
 230         } else {
 231             redirect("view.php?id=$section->course#$sectionreturn");
 232         }
 233
 234     } else if (isset($_GET['indent']) and confirm_sesskey()) {
 235
 236         require_variable($id);
 237
 238         if (! $cm = get_record("course_modules", "id", $id)) {
 239             error("This course module doesn't exist");
 240         }
 241
 242         $cm->indent += $_GET['indent'];
 243
 244         if ($cm->indent < 0) {
 245             $cm->indent = 0;
 246         }
 247
 248         if (!set_field("course_modules", "indent", $cm->indent, "id", $cm->id)) {
 249             error("Could not update the indent level on that course module");
 250         }
 251
 252         if (SITEID == $cm->course) {
 253             redirect($CFG->wwwroot);
 254         } else {
 255             redirect("view.php?id=$cm->course#$sectionreturn");
 256         }
 257         exit;
 258
 259     } else if (isset($_GET['hide']) and confirm_sesskey()) {
 260
 261         if (! $cm = get_record("course_modules", "id", $_GET['hide'])) {
 262             error("This course module doesn't exist");
 263         }
 264
 265         if (!isteacheredit($cm->course)) {
 266             error("You can't modify this course!");
 267         }
 268
 269         set_coursemodule_visible($cm->id, 0);
 270
 271         rebuild_course_cache($cm->course);
 272
 273         if (SITEID == $cm->course) {
 274             redirect($CFG->wwwroot);
 275         } else {
 276             redirect("view.php?id=$cm->course#$sectionreturn");
 277         }
 278         exit;
 279
 280     } else if (isset($_GET['show']) and confirm_sesskey()) {
 281
 282         if (! $cm = get_record("course_modules", "id", $_GET['show'])) {
 283             error("This course module doesn't exist");
 284         }
 285
 286         if (!isteacheredit($cm->course)) {
 287             error("You can't modify this course!");
 288         }
 289
 290         if (! $section = get_record("course_sections", "id", $cm->section)) {
 291             error("This module doesn't exist");
 292         }
 293
 294         if (! $module = get_record("modules", "id", $cm->module)) {
 295             error("This module doesn't exist");
 296         }
 297
 298         if ($module->visible and ($section->visible or (SITEID == $cm->course))) {
 299             set_coursemodule_visible($cm->id, 1);
 300             rebuild_course_cache($cm->course);
 301         }
 302
 303         if (SITEID == $cm->course) {
 304             redirect($CFG->wwwroot);
 305         } else {
 306             redirect("view.php?id=$cm->course#$sectionreturn");
 307         }
 308         exit;
 309
 310     } else if (isset($_GET['groupmode']) and confirm_sesskey()) {
 311
 312         if (! $cm = get_record("course_modules", "id", $_GET['id'])) {
 313             error("This course module doesn't exist");
 314         }
 315
 316         if (!isteacheredit($cm->course)) {
 317             error("You can't modify this course!");
 318         }
 319
 320         set_coursemodule_groupmode($cm->id, $_GET['groupmode']);
 321
 322         rebuild_course_cache($cm->course);
 323
 324         if (SITEID == $cm->course) {
 325             redirect($CFG->wwwroot);
 326         } else {
 327             redirect("view.php?id=$cm->course#$sectionreturn");
 328         }
 329         exit;
 330
 331     } else if (isset($_GET['copy']) and confirm_sesskey()) { // value = course module
 332
 333         if (! $cm = get_record("course_modules", "id", $_GET['copy'])) {
 334             error("This course module doesn't exist");
 335         }
 336
 337         if (!isteacheredit($cm->course)) {
 338             error("You can't modify this course!");
 339         }
 340
 341         if (! $section = get_record("course_sections", "id", $cm->section)) {
 342             error("This module doesn't exist");
 343         }
 344
 345         if (! $module = get_record("modules", "id", $cm->module)) {
 346             error("This module doesn't exist");
 347         }
 348
 349         if (! $instance = get_record($module->name, "id", $cm->instance)) {
 350             error("Could not find the instance of this module");
 351         }
 352
 353         $USER->activitycopy = $copy;
 354         $USER->activitycopycourse = $cm->course;
 355         $USER->activitycopyname = $instance->name;
 356
 357         redirect("view.php?id=$cm->course#$sectionreturn");
 358
 359     } else if (isset($_GET['cancelcopy']) and confirm_sesskey()) { // value = course module
 360
 361         $courseid = $USER->activitycopycourse;
 362
 363         unset($USER->activitycopy);
 364         unset($USER->activitycopycourse);
 365         unset($USER->activitycopyname);
 366
 367         redirect("view.php?id=$courseid#$sectionreturn");
 368
 369     } else if (isset($_GET['delete']) and confirm_sesskey()) {   // value = course module
 370
 371         if (! $cm = get_record("course_modules", "id", $_GET['delete'])) {
 372             error("This course module doesn't exist");
 373         }
 374
 375         if (! $course = get_record("course", "id", $cm->course)) {
 376             error("This course doesn't exist");
 377         }
 378
 379         if (!isteacheredit($course->id)) {
 380             error("You can't modify this course!");
 381         }
 382
 383         if (! $module = get_record("modules", "id", $cm->module)) {
 384             error("This module doesn't exist");
 385         }
 386
 387         if (! $instance = get_record($module->name, "id", $cm->instance)) {
 388             // Delete this module from the course right away
 389             if (! delete_mod_from_section($cm->id, $cm->section)) {
 390                 notify("Could not delete the $module->name from that section");
 391             }
 392             if (! delete_course_module($cm->id)) {
 393                 notify("Could not delete the $module->name (coursemodule)");
 394             }
 395             error("The required instance of this module didn't exist.  Module deleted.",
 396                   "$CFG->wwwroot/course/view.php?id=$course->id");
 397         }
 398
 399         $fullmodulename = get_string("modulename", $module->name);
 400
 401         $form->coursemodule = $cm->id;
 402         $form->section      = $cm->section;
 403         $form->course       = $cm->course;
 404         $form->instance     = $cm->instance;
 405         $form->modulename   = $module->name;
 406         $form->fullmodulename  = $fullmodulename;
 407         $form->instancename = $instance->name;
 408         $form->sesskey      = !empty($USER->id) ? $USER->sesskey : '';
 409
 410         $strdeletecheck = get_string("deletecheck", "", "$form->fullmodulename");
 411         $strdeletecheckfull = get_string("deletecheckfull", "", "$form->fullmodulename '$form->instancename'");
 412
 413         print_header_simple("$strdeletecheck", "",
 414                      "$strdeletecheck");
 415
 416         print_simple_box_start("center", "60%", "#FFAAAA", 20, "noticebox");
 417         print_heading($strdeletecheckfull);
 418         include_once("mod_delete.html");
 419         print_simple_box_end();
 420         print_footer($course);
 421
 422         exit;
 423
 424
 425     } else if (isset($_GET['update']) and confirm_sesskey()) {   // value = course module
 426
 427         if (! $cm = get_record("course_modules", "id", $_GET['update'])) {
 428             error("This course module doesn't exist");
 429         }
 430
 431         if (! $course = get_record("course", "id", $cm->course)) {
 432             error("This course doesn't exist");
 433         }
 434
 435         if (!isteacheredit($course->id)) {
 436             error("You can't modify this course!");
 437         }
 438
 439         if (! $module = get_record("modules", "id", $cm->module)) {
 440             error("This module doesn't exist");
 441         }
 442
 443         if (! $form = get_record($module->name, "id", $cm->instance)) {
 444             error("The required instance of this module doesn't exist");
 445         }
 446
 447         if (! $cw = get_record("course_sections", "id", $cm->section)) {
 448             error("This course section doesn't exist");
 449         }
 450
 451         if (isset($return)) {
 452             $SESSION->returnpage = "$CFG->wwwroot/mod/$module->name/view.php?id=$cm->id";
 453         }
 454
 455         $form->coursemodule = $cm->id;
 456         $form->section      = $cm->section;     // The section ID
 457         $form->course       = $course->id;
 458         $form->module       = $module->id;
 459         $form->modulename   = $module->name;
 460         $form->instance     = $cm->instance;
 461         $form->mode         = "update";
 462         $form->sesskey      = !empty($USER->id) ? $USER->sesskey : '';
 463
 464         $sectionname    = get_string("name$course->format");
 465         $fullmodulename = strtolower(get_string("modulename", $module->name));
 466
 467         if ($form->section) {
 468             $heading->what = $fullmodulename;
 469             $heading->in   = "$sectionname $cw->section";
 470             $pageheading = get_string("updatingain", "moodle", $heading);
 471         } else {
 472             $pageheading = get_string("updatinga", "moodle", $fullmodulename);
 473         }
 474         $strnav = "<a href=\"$CFG->wwwroot/mod/$module->name/view.php?id=$cm->id\">".format_string($form->name,true)."</a> ->";
 475
 476     } else if (isset($_GET['duplicate']) and confirm_sesskey()) {   // value = course module
 477
 478         if (! $cm = get_record("course_modules", "id", $_GET['duplicate'])) {
 479             error("This course module doesn't exist");
 480         }
 481
 482         if (! $course = get_record("course", "id", $cm->course)) {
 483             error("This course doesn't exist");
 484         }
 485
 486         if (!isteacheredit($course->id)) {
 487             error("You can't modify this course!");
 488         }
 489
 490         if (! $module = get_record("modules", "id", $cm->module)) {
 491             error("This module doesn't exist");
 492         }
 493
 494         if (! $form = get_record($module->name, "id", $cm->instance)) {
 495             error("The required instance of this module doesn't exist");
 496         }
 497
 498         if (! $cw = get_record("course_sections", "id", $cm->section)) {
 499             error("This course section doesn't exist");
 500         }
 501
 502         if (isset($return)) {
 503             $SESSION->returnpage = "$CFG->wwwroot/mod/$module->name/view.php?id=$cm->id";
 504         }
 505
 506         $section = get_field('course_sections', 'section', 'id', $cm->section);
 507
 508         $form->coursemodule = $cm->id;
 509         $form->section      = $section;     // The section ID
 510         $form->course       = $course->id;
 511         $form->module       = $module->id;
 512         $form->modulename   = $module->name;
 513         $form->instance     = $cm->instance;
 514         $form->mode         = "add";
 515         $form->sesskey      = !empty($USER->id) ? $USER->sesskey : '';
 516
 517         $sectionname    = get_string("name$course->format");
 518         $fullmodulename = strtolower(get_string("modulename", $module->name));
 519
 520         if ($form->section) {
 521             $heading->what = $fullmodulename;
 522             $heading->in   = "$sectionname $cw->section";
 523             $pageheading = get_string("duplicatingain", "moodle", $heading);
 524         } else {
 525             $pageheading = get_string("duplicatinga", "moodle", $fullmodulename);
 526         }
 527         $strnav = "<a href=\"$CFG->wwwroot/mod/$module->name/view.php?id=$cm->id\">$form->name</a> ->";
 528
 529
 530     } else if (isset($_GET['add']) and confirm_sesskey()) {
 531
 532         if (empty($_GET['add'])) {
 533             redirect($_SERVER["HTTP_REFERER"]);
 534             die;
 535         }
 536
 537         require_variable($id);
 538         require_variable($section);
 539
 540         if (! $course = get_record("course", "id", $id)) {
 541             error("This course doesn't exist");
 542         }
 543
 544         if (! $module = get_record("modules", "name", $_GET['add'])) {
 545             error("This module type doesn't exist");
 546         }
 547
 548         $form->section    = $section;         // The section number itself
 549         $form->course     = $course->id;
 550         $form->module     = $module->id;
 551         $form->modulename = $module->name;
 552         $form->instance   = "";
 553         $form->coursemodule = "";
 554         $form->mode       = "add";
 555         $form->sesskey    = !empty($USER->id) ? $USER->sesskey : '';
 556         if (isset($_GET['type'])) {
 557             $form->type = $_GET['type'];
 558         }
 559
 560         $sectionname    = get_string("name$course->format");
 561         $fullmodulename = get_string("modulename", $module->name);
 562
 563         if ($form->section) {
 564             $heading->what = $fullmodulename;
 565             $heading->to   = "$sectionname $form->section";
 566             $pageheading = get_string("addinganewto", "moodle", $heading);
 567         } else {
 568             $pageheading = get_string("addinganew", "moodle", $fullmodulename);
 569         }
 570         $strnav = '';
 571
 572     } else {
 573         error("No action was specfied");
 574     }
 575
 576     if (!isteacheredit($course->id)) {
 577         error("You can't modify this course!");
 578     }
 579
 580     $streditinga = get_string("editinga", "moodle", $fullmodulename);
 581     $strmodulenameplural = get_string("modulenameplural", $module->name);
 582
 583     if ($module->name == "label") {
 584         $focuscursor = "";
 585     } else {
 586         $focuscursor = "form.name";
 587     }
 588
 589     print_header_simple($streditinga, '',
 590      "<a href=\"$CFG->wwwroot/mod/$module->name/index.php?id=$course->id\">$strmodulenameplural</a> ->
 591      $strnav $streditinga", $focuscursor, "", false);
 592
 593     unset($SESSION->modform); // Clear any old ones that may be hanging around.
 594
 595     $modform = "../mod/$module->name/mod.html";
 596
 597     if (file_exists($modform)) {
 598
 599         if ($usehtmleditor = can_use_html_editor()) {
 600             $defaultformat = FORMAT_HTML;
 601             $editorfields = '';
 602         } else {
 603             $defaultformat = FORMAT_MOODLE;
 604         }
 605
 606         $icon = "<img align=\"middle\" height=\"16\" width=\"16\" src=\"$CFG->modpixpath/$module->name/icon.gif\" alt=\"\" />&nbsp;";
 607
 608         print_heading_with_help($pageheading, "mods", $module->name, $icon);
 609         print_simple_box_start("center");
 610         include_once($modform);
 611         print_simple_box_end();
 612
 613         if ($usehtmleditor and empty($nohtmleditorneeded)) {
 614             use_html_editor($editorfields);
 615         }
 616
 617     } else {
 618         notice("This module cannot be added to this course yet! (No file found at: $modform)", "$CFG->wwwroot/course/view.php?id=$course->id");
 619     }
 620
 621     print_footer($course);
 622
 623 ?>