course/teacher.php

   1 <?php // $Id$
   2       // Admin-only script to assign teachers to courses
   3
   4     require_once("../config.php");
   5
   6     define("MAX_USERS_PER_PAGE", 50);
   7
   8     $id     = required_param('id', PARAM_INT);         // course id
   9     $add    = optional_param('add', 0, PARAM_INT);
  10     $remove = optional_param('remove', 0, PARAM_INT);
  11     $search = optional_param('search', '', PARAM_RAW); // search string
  12
  13     require_login();
  14
  15     if (! $course = get_record("course", "id", $id)) {
  16         error("Course ID was incorrect (can't find it)");
  17     }
  18
  19     if (!(isteacheredit($course->id) and iscreator()) and
  20         !(isteacheredit($course->id) and !empty($CFG->teacherassignteachers) ) ) {
  21         error("You must be an administrator or course creator to use this page.");
  22     }
  23
  24     $strassignteachers = get_string("assignteachers");
  25     $strcourses = get_string("courses");
  26     $strteachers = get_string("teachers");
  27     $stradministration = get_string("administration");
  28     $strexistingteachers   = get_string("existingteachers");
  29     $strnoexistingteachers = get_string("noexistingteachers");
  30     $strpotentialteachers  = get_string("potentialteachers");
  31     $strnopotentialteachers  = get_string("nopotentialteachers");
  32     $straddteacher    = get_string("addteacher");
  33     $strremoveteacher = get_string("removeteacher");
  34     $strsearch        = get_string("search");
  35     $strsearchresults  = get_string("searchresults");
  36     $strsearchagain   = get_string("searchagain");
  37     $strtoomanytoshow   = get_string("toomanytoshow");
  38     $strname   = get_string("name");
  39     $strorder   = get_string("order");
  40     $strrole   = get_string("role");
  41     $stredit   = get_string("editingteachershort");
  42     $stryes   = get_string("yes");
  43     $strno   = get_string("no");
  44
  45     if ($search) {
  46         $searchstring = $strsearchagain;
  47     } else {
  48         $searchstring = $strsearch;
  49     }
  50
  51     if ($course->teachers != $strteachers) {
  52         $parateachers = " ($course->teachers)";
  53     } else {
  54         $parateachers = "";
  55     }
  56
  57
  58 /// If data submitted, then process and store.
  59
  60     if ($form = data_submitted() and confirm_sesskey()) {
  61         unset ($form->sesskey);
  62         $rank = array();
  63
  64         // Peel out all the data from variable names.
  65         foreach ($form as $key => $val) {
  66             if ($key <> "id") {
  67                 $type = substr($key,0,1);
  68                 $num  = substr($key,1);
  69                 $rank[$num][$type] = $val;
  70             }
  71         }
  72
  73         foreach ($rank as $num => $vals) {
  74             if (! $teacher = get_record("user_teachers", "course", "$course->id", "userid", "$num")) {
  75                 error("No such teacher in course $course->shortname with user id $num");
  76             }
  77             $teacher->role = $vals['r'];
  78             $teacher->authority = $vals['a'];
  79             $teacher->editall = $vals['e'];
  80             if (!update_record("user_teachers", $teacher)) {
  81                 error("Could not update teacher entry id = $teacher->id");
  82             }
  83         }
  84         redirect("teacher.php?id=$course->id", get_string("changessaved"));
  85     }
  86
  87
  88 /// Print headers
  89
  90     print_header("$course->shortname: $strassignteachers",
  91                  "$course->fullname",
  92                  "<a href=\"index.php\">$strcourses</a> -> ".
  93                  "<a href=\"view.php?id=$course->id\">$course->shortname</a> -> ".
  94                  "$strassignteachers", "");
  95
  96 /// Add a teacher if one is specified
  97
  98     if (!empty($add) and confirm_sesskey()) {
  99         if (! add_teacher($add, $course->id)) {
 100             error("Could not add that teacher to this course!");
 101         }
 102     }
 103
 104 /// Remove a teacher if one is specified.
 105
 106     if (!empty($remove) and confirm_sesskey()) {
 107         if (! remove_teacher($remove, $course->id)) {
 108             error("Could not remove that teacher from this course!");
 109         }
 110     }
 111
 112 /// Display all current teachers for this course.
 113     $teachers = get_course_teachers($course->id);
 114
 115     print_heading_with_help("$strexistingteachers $parateachers", "teachers");
 116
 117     if (empty($teachers)) {
 118         echo "<p align=\"center\">$strnoexistingteachers</a>";
 119         $teacherlist = "";
 120
 121     } else {
 122
 123         $table->head  = array ("", $strname, $strorder, $strrole, $stredit, "&nbsp;");
 124         $table->align = array ("right", "left", "center", "center", "center", "center");
 125         $table->size  = array ("35", "", "", "", "10", "");
 126
 127         $ordermenu = NULL;
 128         $ordermenu[0] = get_string("hide");
 129         for ($i=1; $i<=8; $i++) {
 130             $ordermenu[$i] = $i;
 131         }
 132
 133         $editmenu = NULL;
 134         $editmenu[0] = $strno;
 135         $editmenu[1] = $stryes;
 136
 137         $teacherarray = array();
 138
 139         echo "<form action=\"teacher.php\" method=\"post\">";
 140         foreach ($teachers as $teacher) {
 141             $teacherarray[] = $teacher->id;
 142
 143             $picture = print_user_picture($teacher->id, $course->id, $teacher->picture, false, true);
 144
 145             $authority = choose_from_menu ($ordermenu, "a$teacher->id", $teacher->authority, "", "", "", true);
 146
 147             if ($USER->id == $teacher->id) {
 148                 $editall = "<input name=\"e$teacher->id\" type=\"hidden\" value=\"1\" />$stryes";
 149             } else {
 150                 $editall = choose_from_menu ($editmenu, "e$teacher->id", $teacher->editall, "", "", "", true);
 151             }
 152
 153             $removelink = "<a href=\"teacher.php?id=$course->id&amp;remove=$teacher->id&amp;sesskey=$USER->sesskey\">$strremoveteacher</a>";
 154
 155             if (!$teacher->role) {
 156                 $teacher->role = $course->teacher;
 157             }
 158
 159             $table->data[] = array ($picture, fullname($teacher, true), $authority,
 160                                     "<input type=\"text\" name=\"r$teacher->id\" value=\"$teacher->role\" size=\"30\" maxlength=\"40\" />",
 161                                     $editall, $removelink);
 162         }
 163         $teacherlist = implode(",",$teacherarray);
 164         unset($teacherarray);
 165
 166         print_table($table);
 167         echo "<input type=\"hidden\" name=\"id\" value=\"$course->id\" />";
 168         echo "<input type=\"hidden\" name=\"sesskey\" value=\"$USER->sesskey\" />";
 169         echo "<center><input type=\"submit\" value=\"".get_string("savechanges")."\" /> ";
 170         echo "</center>";
 171         echo "</form>";
 172         echo "<br />";
 173     }
 174
 175
 176 /// Print list of potential teachers
 177
 178     print_heading("$strpotentialteachers $parateachers");
 179
 180     $usercount = get_users(false, $search, true, $teacherlist);
 181
 182     if ($usercount == 0) {
 183         echo "<p align=\"center\">$strnopotentialteachers</p>";
 184
 185     } else if ($usercount > MAX_USERS_PER_PAGE) {
 186         echo "<p align=\"center\">$strtoomanytoshow ($usercount) </p>";
 187
 188     } else {
 189
 190         if ($search != '') {
 191             echo "<p align=\"center\">($strsearchresults : ".s($search, true).")</p>";
 192         }
 193
 194         if (!$users = get_users(true, $search, true, $teacherlist)) {
 195             error("Could not get users!");
 196         }
 197
 198         unset($table);
 199         $table->head  = array ("", get_string("name"), get_string("email"), "");
 200         $table->align = array ("right", "left", "center", "center");
 201         $table->size  = array ("35", "", "", "");
 202
 203
 204         foreach ($users as $user) {
 205             $addlink = "<a href=\"teacher.php?id=$course->id&amp;add=$user->id&amp;sesskey=$USER->sesskey\">$straddteacher</a>";
 206             $picture = print_user_picture($user->id, $course->id, $user->picture, false, true);
 207             $table->data[] = array ($picture, fullname($user, true), $user->email, $addlink);
 208         }
 209         print_table($table);
 210     }
 211
 212     if (($search != '') or $usercount > MAX_USERS_PER_PAGE) {
 213         echo "<center>";
 214         echo "<form action=\"teacher.php\" method=\"get\">";
 215         echo "<input type=\"hidden\" name=\"id\" value=\"$course->id\" />";
 216         echo "<input type=\"text\" name=\"search\" size=\"20\" />";
 217         echo "<input type=\"submit\" value=\"$searchstring\" />";
 218         echo "</form>";
 219         echo "</center>";
 220     }
 221
 222     print_footer($course);
 223
 224 ?>