course/mod.php

   1 <?PHP // $Id$
   2
   3 //  Moves, adds, updates or deletes modules in a course
   4
   5     require("../config.php");
   6     require("lib.php");
   7
   8     require_login();
   9
  10     if (isset($cancel)) {
  11         if (!empty($SESSION->returnpage)) {
  12             $return = $SESSION->returnpage;
  13             unset($SESSION->returnpage);
  14             redirect($return);
  15         } else {
  16             redirect("view.php?id=$mod->course");
  17         }
  18     }
  19
  20
  21     if (isset($_POST["course"])) {    // add or update form submitted
  22
  23         if (isset($SESSION->modform)) {   // Variables are stored in the session
  24             $mod = $SESSION->modform;
  25             unset($SESSION->modform);
  26         } else {
  27             $mod = (object)$_POST;
  28         }
  29
  30         if (!isteacher($mod->course)) {
  31             error("You can't modify this course!");
  32         }
  33
  34         $modlib = "../mod/$mod->modulename/lib.php";
  35         if (file_exists($modlib)) {
  36             include_once($modlib);
  37         } else {
  38             error("This module is missing important code! ($modlib)");
  39         }
  40         $addinstancefunction    = $mod->modulename."_add_instance";
  41         $updateinstancefunction = $mod->modulename."_update_instance";
  42         $deleteinstancefunction = $mod->modulename."_delete_instance";
  43
  44         switch ($mod->mode) {
  45             case "update":
  46                 if (! $updateinstancefunction($mod)) {
  47                     error("Could not update the $mod->modulename");
  48                 }
  49                 add_to_log($mod->course, "course", "update mod",
  50                            "../mod/$mod->modulename/view.php?id=$mod->coursemodule",
  51                            "$mod->modulename $mod->instance");
  52                 break;
  53
  54             case "add":
  55                 if (! $mod->instance = $addinstancefunction($mod)) {
  56                     error("Could not add a new instance of $mod->modulename");
  57                 }
  58                 // course_modules and course_sections each contain a reference
  59                 // to each other, so we have to update one of them twice.
  60
  61                 if (! $mod->coursemodule = add_course_module($mod) ) {
  62                     error("Could not add a new course module");
  63                 }
  64                 if (! $sectionid = add_mod_to_section($mod) ) {
  65                     error("Could not add the new course module to that section");
  66                 }
  67                 if (! set_field("course_modules", "section", $sectionid, "id", $mod->coursemodule)) {
  68                     error("Could not update the course module with the correct section");
  69                 }
  70                 add_to_log($mod->course, "course", "add mod",
  71                            "../mod/$mod->modulename/view.php?id=$mod->coursemodule",
  72                            "$mod->modulename $mod->instance");
  73                 break;
  74             case "delete":
  75                 if (! $deleteinstancefunction($mod->instance)) {
  76                     notify("Could not delete the $mod->modulename (instance)");
  77                 }
  78                 if (! delete_course_module($mod->coursemodule)) {
  79                     notify("Could not delete the $mod->modulename (coursemodule)");
  80                 }
  81                 if (! delete_mod_from_section($mod->coursemodule, "$mod->section")) {
  82                     notify("Could not delete the $mod->modulename from that section");
  83                 }
  84                 add_to_log($mod->course, "course", "delete mod",
  85                            "view.php?id=$mod->course",
  86                            "$mod->modulename $mod->instance");
  87                 break;
  88             default:
  89                 error("No mode defined");
  90
  91         }
  92
  93         rebuild_course_cache($mod->course);
  94
  95         if (!empty($SESSION->returnpage)) {
  96             $return = $SESSION->returnpage;
  97             unset($SESSION->returnpage);
  98             redirect($return);
  99         } else {
 100             redirect("view.php?id=$mod->course");
 101         }
 102         exit;
 103     }
 104
 105
 106     if (isset($move)) {
 107
 108         require_variable($id);
 109
 110         if (! $cm = get_record("course_modules", "id", $id)) {
 111             error("This course module doesn't exist");
 112         }
 113
 114         if (!isteacher($cm->course)) {
 115             error("You can't modify this course!");
 116         }
 117
 118         move_module($cm, $move);
 119
 120         rebuild_course_cache($cm->course);
 121
 122         $site = get_site();
 123         if ($site->id == $cm->course) {
 124             redirect($CFG->wwwroot);
 125         } else {
 126             redirect("view.php?id=$cm->course");
 127         }
 128         exit;
 129
 130     } else if (isset($hide)) {
 131
 132         if (! $cm = get_record("course_modules", "id", $hide)) {
 133             error("This course module doesn't exist");
 134         }
 135
 136         if (!isteacher($cm->course)) {
 137             error("You can't modify this course!");
 138         }
 139
 140         hide_course_module($cm->id);
 141
 142         rebuild_course_cache($cm->course);
 143
 144         $site = get_site();
 145         if ($site->id == $cm->course) {
 146             redirect($CFG->wwwroot);
 147         } else {
 148             redirect("view.php?id=$cm->course");
 149         }
 150         exit;
 151
 152     } else if (isset($show)) {
 153
 154         if (! $cm = get_record("course_modules", "id", $show)) {
 155             error("This course module doesn't exist");
 156         }
 157
 158         if (!isteacher($cm->course)) {
 159             error("You can't modify this course!");
 160         }
 161
 162         if (! $section = get_record("course_sections", "id", $cm->section)) {
 163             error("This module doesn't exist");
 164         }
 165
 166         if (! $module = get_record("modules", "id", $cm->module)) {
 167             error("This module doesn't exist");
 168         }
 169
 170         $site = get_site();
 171
 172         if ($module->visible and ($section->visible or ($site->id == $cm->course))) {
 173             show_course_module($cm->id);
 174             rebuild_course_cache($cm->course);
 175         }
 176
 177         if ($site->id == $cm->course) {
 178             redirect($CFG->wwwroot);
 179         } else {
 180             redirect("view.php?id=$cm->course");
 181         }
 182         exit;
 183
 184     } else if (isset($delete)) {   // value = course module
 185
 186         if (! $cm = get_record("course_modules", "id", $delete)) {
 187             error("This course module doesn't exist");
 188         }
 189
 190         if (! $course = get_record("course", "id", $cm->course)) {
 191             error("This course doesn't exist");
 192         }
 193
 194         if (!isteacher($course->id)) {
 195             error("You can't modify this course!");
 196         }
 197
 198         if (! $module = get_record("modules", "id", $cm->module)) {
 199             error("This module doesn't exist");
 200         }
 201
 202         if (! $instance = get_record($module->name, "id", $cm->instance)) {
 203             // Delete this module from the course right away
 204             if (! delete_course_module($cm->id)) {
 205                 notify("Could not delete the $module->name (coursemodule)");
 206             }
 207             if (! delete_mod_from_section($cm->id, $cm->section)) {
 208                 notify("Could not delete the $module->name from that section");
 209             }
 210             error("The required instance of this module didn't exist.  Module deleted.",
 211                   "$CFG->wwwroot/course/view.php?id=$course->id");
 212         }
 213
 214         $fullmodulename = strtolower(get_string("modulename", $module->name));
 215
 216         $form->coursemodule = $cm->id;
 217         $form->section      = $cm->section;
 218         $form->course       = $cm->course;
 219         $form->instance     = $cm->instance;
 220         $form->modulename   = $module->name;
 221         $form->fullmodulename  = $fullmodulename;
 222         $form->instancename = $instance->name;
 223
 224         $strdeletecheck = get_string("deletecheck", "", "$form->fullmodulename");
 225         $strdeletecheckfull = get_string("deletecheckfull", "", "$form->fullmodulename '$form->instancename'");
 226
 227         print_header("$course->shortname: $strdeletecheck", "$course->fullname",
 228                      "<A HREF=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</A> ->
 229                       $strdeletecheck");
 230
 231         print_simple_box_start("center", "60%", "#FFAAAA", 20, "noticebox");
 232         print_heading($strdeletecheckfull);
 233         include_once("mod_delete.html");
 234         print_simple_box_end();
 235         print_footer($course);
 236
 237         exit;
 238
 239
 240     } else if (isset($update)) {   // value = course module
 241
 242         if (! $cm = get_record("course_modules", "id", $update)) {
 243             error("This course module doesn't exist");
 244         }
 245
 246         if (! $course = get_record("course", "id", $cm->course)) {
 247             error("This course doesn't exist");
 248         }
 249
 250         if (!isteacher($course->id)) {
 251             error("You can't modify this course!");
 252         }
 253
 254         if (! $module = get_record("modules", "id", $cm->module)) {
 255             error("This module doesn't exist");
 256         }
 257
 258         if (! $form = get_record($module->name, "id", $cm->instance)) {
 259             error("The required instance of this module doesn't exist");
 260         }
 261
 262         if (! $cw = get_record("course_sections", "id", $cm->section)) {
 263             error("This course section doesn't exist");
 264         }
 265
 266         if (isset($return)) {
 267             $SESSION->returnpage = "$CFG->wwwroot/mod/$module->name/view.php?id=$cm->id";
 268         }
 269
 270         $form->coursemodule = $cm->id;
 271         $form->section      = $cm->section;     // The section ID
 272         $form->course       = $course->id;
 273         $form->module       = $module->id;
 274         $form->modulename   = $module->name;
 275         $form->instance     = $cm->instance;
 276         $form->mode         = "update";
 277
 278         $sectionname    = get_string("name$course->format");
 279         $fullmodulename = strtolower(get_string("modulename", $module->name));
 280
 281         if ($form->section) {
 282             $heading->what = $fullmodulename;
 283             $heading->in   = "$sectionname $cw->section";
 284             $pageheading = get_string("updatingain", "moodle", $heading);
 285         } else {
 286             $pageheading = get_string("updatinga", "moodle", $fullmodulename);
 287         }
 288
 289
 290     } else if (isset($add)) {
 291
 292         if (!$add) {
 293             redirect($_SERVER["HTTP_REFERER"]);
 294             die;
 295         }
 296
 297         require_variable($id);
 298         require_variable($section);
 299
 300         if (! $course = get_record("course", "id", $id)) {
 301             error("This course doesn't exist");
 302         }
 303
 304         if (! $module = get_record("modules", "name", $add)) {
 305             error("This module type doesn't exist");
 306         }
 307
 308         $form->section    = $section;         // The section number itself
 309         $form->course     = $course->id;
 310         $form->module     = $module->id;
 311         $form->modulename = $module->name;
 312         $form->instance   = "";
 313         $form->coursemodule = "";
 314         $form->mode       = "add";
 315
 316         $sectionname    = get_string("name$course->format");
 317         $fullmodulename = strtolower(get_string("modulename", $module->name));
 318
 319         if ($form->section) {
 320             $heading->what = $fullmodulename;
 321             $heading->to   = "$sectionname $form->section";
 322             $pageheading = get_string("addinganewto", "moodle", $heading);
 323         } else {
 324             $pageheading = get_string("addinganew", "moodle", $fullmodulename);
 325         }
 326
 327     } else {
 328         error("No action was specfied");
 329     }
 330
 331     if (!isteacher($course->id)) {
 332         error("You can't modify this course!");
 333     }
 334
 335     $streditinga = get_string("editinga", "moodle", $fullmodulename);
 336     $strmodulenameplural = get_string("modulenameplural", $module->name);
 337
 338     if ($course->category) {
 339         print_header("$course->shortname: $streditinga", "$course->fullname",
 340                      "<A HREF=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</A> ->
 341                       <A HREF=\"$CFG->wwwroot/mod/$module->name/index.php?id=$course->id\">$strmodulenameplural</A> ->
 342                       $streditinga", "form.name", "", false);
 343     } else {
 344         print_header("$course->shortname: $streditinga", "$course->fullname",
 345                      "$streditinga", "form.name", "", false);
 346     }
 347
 348     unset($SESSION->modform); // Clear any old ones that may be hanging around.
 349
 350     $modform = "../mod/$module->name/mod.html";
 351
 352     if (file_exists($modform)) {
 353
 354         print_heading($pageheading);
 355         print_simple_box_start("center", "", "$THEME->cellheading");
 356         include_once($modform);
 357         print_simple_box_end();
 358
 359     } else {
 360         notice("This module cannot be added to this course yet! (No file found at: $modform)", "$CFG->wwwroot/course/view.php?id=$course->id");
 361     }
 362
 363     print_footer($course);
 364
 365 ?>