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     require_variable($id);         // course id
   9     optional_variable($add, "");
  10     optional_variable($remove, "");
  11     optional_variable($search, ""); // 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         $parateachers = "";
  55     }
  56
  57
  58
  59 /// Print headers
  60
  61     print_header("$course->shortname: $strassignteachers",
  62                  "$course->fullname",
  63                  "<a href=\"index.php\">$strcourses</a> -> ".
  64                  "<a href=\"view.php?id=$course->id\">$course->shortname</a> -> ".
  65                  "$strassignteachers", "");
  66
  67
  68 /// If data submitted, then process and store.
  69
  70     if ($form = data_submitted() and confirm_sesskey()) {
  71         unset ($form->sesskey);
  72         $rank = array();
  73
  74         // Peel out all the data from variable names.
  75         foreach ($form as $key => $val) {
  76             if ($key <> "id") {
  77                 $type = substr($key,0,1);
  78                 $num  = substr($key,1);
  79                 $rank[$num][$type] = $val;
  80             }
  81         }
  82
  83         foreach ($rank as $num => $vals) {
  84             if (! $teacher = get_record("user_teachers", "course", "$course->id", "userid", "$num")) {
  85                 error("No such teacher in course $course->shortname with user id $num");
  86             }
  87             $teacher->role = $vals['r'];
  88             $teacher->authority = $vals['a'];
  89             $teacher->editall = $vals['e'];
  90             if (!update_record("user_teachers", $teacher)) {
  91                 error("Could not update teacher entry id = $teacher->id");
  92             }
  93         }
  94         redirect("teacher.php?id=$course->id", get_string("changessaved"));
  95     }
  96
  97 /// Add a teacher if one is specified
  98
  99     if (!empty($_GET['add']) and confirm_sesskey()) {
 100         if (! add_teacher($add, $course->id)) {
 101             error("Could not add that teacher to this course!");
 102         }
 103     }
 104
 105 /// Remove a teacher if one is specified.
 106
 107     if (!empty($_GET['remove']) and confirm_sesskey()) {
 108         if (! remove_teacher($remove, $course->id)) {
 109             error("Could not remove that teacher from this course!");
 110         }
 111     }
 112
 113 /// Display all current teachers for this course.
 114     $teachers = get_course_teachers($course->id);
 115
 116     print_heading_with_help("$strexistingteachers $parateachers", "teachers");
 117
 118     if (empty($teachers)) {
 119         echo "<p align=\"center\">$strnoexistingteachers</a>";
 120         $teacherlist = "";
 121
 122     } else {
 123
 124         $table->head  = array ("", $strname, $strorder, $strrole, $stredit, "&nbsp;");
 125         $table->align = array ("right", "left", "center", "center", "center", "center");
 126         $table->size  = array ("35", "", "", "", "10", "");
 127
 128         $ordermenu = NULL;
 129         $ordermenu[0] = get_string("hide");
 130         for ($i=1; $i<=8; $i++) {
 131             $ordermenu[$i] = $i;
 132         }
 133
 134         $editmenu = NULL;
 135         $editmenu[0] = $strno;
 136         $editmenu[1] = $stryes;
 137
 138         $teacherarray = array();
 139
 140         echo "<form action=\"teacher.php\" method=\"post\">";
 141         foreach ($teachers as $teacher) {
 142             $teacherarray[] = $teacher->id;
 143
 144             $picture = print_user_picture($teacher->id, $course->id, $teacher->picture, false, true);
 145
 146             $authority = choose_from_menu ($ordermenu, "a$teacher->id", $teacher->authority, "", "", "", true);
 147
 148             if ($USER->id == $teacher->id) {
 149                 $editall = "<input name=\"e$teacher->id\" type=\"hidden\" value=\"1\" />$stryes";
 150             } else {
 151                 $editall = choose_from_menu ($editmenu, "e$teacher->id", $teacher->editall, "", "", "", true);
 152             }
 153
 154             $removelink = "<a href=\"teacher.php?id=$course->id&amp;remove=$teacher->id&amp;sesskey=$USER->sesskey\">$strremoveteacher</a>";
 155
 156             if (!$teacher->role) {
 157                 $teacher->role = $course->teacher;
 158             }
 159
 160             $table->data[] = array ($picture, fullname($teacher, true), $authority,
 161                                     "<input type=\"text\" name=\"r$teacher->id\" value=\"$teacher->role\" size=\"30\" />",
 162                                     $editall, $removelink);
 163         }
 164         $teacherlist = implode(",",$teacherarray);
 165         unset($teacherarray);
 166
 167         print_table($table);
 168         echo "<input type=\"hidden\" name=\"id\" value=\"$course->id\" />";
 169         echo "<input type=\"hidden\" name=\"sesskey\" value=\"$USER->sesskey\" />";
 170         echo "<center><input type=\"submit\" value=\"".get_string("savechanges")."\" /> ";
 171         echo "</center>";
 172         echo "</form>";
 173         echo "<br />";
 174     }
 175
 176
 177 /// Print list of potential teachers
 178
 179     print_heading("$strpotentialteachers $parateachers");
 180
 181     $usercount = get_users(false, $search, true, $teacherlist);
 182
 183     if ($usercount == 0) {
 184         echo "<p align=\"center\">$strnopotentialteachers</p>";
 185
 186     } else if ($usercount > MAX_USERS_PER_PAGE) {
 187         echo "<p align=\"center\">$strtoomanytoshow ($usercount) </p>";
 188
 189     } else {
 190
 191         if ($search) {
 192             echo "<p align=\"center\">($strsearchresults : $search)</p>";
 193         }
 194
 195         if (!$users = get_users(true, $search, true, $teacherlist)) {
 196             error("Could not get users!");
 197         }
 198
 199         unset($table);
 200         $table->head  = array ("", get_string("name"), get_string("email"), "");
 201         $table->align = array ("right", "left", "center", "center");
 202         $table->size  = array ("35", "", "", "");
 203
 204
 205         foreach ($users as $user) {
 206             $addlink = "<a href=\"teacher.php?id=$course->id&amp;add=$user->id&amp;sesskey=$USER->sesskey\">$straddteacher</a>";
 207             $picture = print_user_picture($user->id, $course->id, $user->picture, false, true);
 208             $table->data[] = array ($picture, fullname($user, true), $user->email, $addlink);
 209         }
 210         print_table($table);
 211     }
 212
 213     if ($search or $usercount > MAX_USERS_PER_PAGE) {
 214         echo "<center>";
 215         echo "<form action=\"teacher.php\" method=\"get\">";
 216         echo "<input type=\"hidden\" name=\"id\" value=\"$course->id\" />";
 217         echo "<input type=\"text\" name=\"search\" size=\"20\" />";
 218         echo "<input type=\"submit\" value=\"$searchstring\" />";
 219         echo "</form>";
 220         echo "</center>";
 221     }
 222
 223     print_footer($course);
 224
 225 ?>