Part of the future question type plug-in mechanism. This is not yet a…

…ctive, I am committing this only so as not to loose it.

admin/questiontypes.php

@@ -0,0 +1,171 @@
+<?PHP // $Id$
+      // Allows the admin to manage questiontypes
+      // This page is adapted from modules.php
+
+      // This page is not yet in service, the whole plug-in architecture
+      // for question types is still under construction.
+
+    require_once("../config.php");
+
+    $disable = optional_param('disable');
+    $enable = optional_param('enable');
+    $delete = optional_param('delete');
+    $confirm = optional_param('confirm');
+
+    require_login();
+
+    if (!isadmin()) {
+        error("Only administrators can use this page!");
+    }
+
+    if (!$site = get_site()) {
+        error("Site isn't defined!");
+    }
+
+
+/// Print headings
+
+    $stradministration = get_string("administration");
+    $strconfiguration = get_string("configuration");
+    $strdelete = get_string("delete");
+    $strversion = get_string("version");
+    $strhide = get_string("hide");
+    $strshow = get_string("show");
+    $strsettings = get_string("settings");
+    $strquestions = get_string("questions");
+    $strquestiontype = get_string("questiontype", 'quiz');
+
+    print_header("$site->shortname: $strquestions", "$site->fullname", 
+                 "<a href=\"index.php\">$stradministration</a> -> ".
+                 "<a href=\"configure.php\">$strconfiguration</a> -> $strquestions");
+
+    print_heading($strquestions);
+
+
+/// If data submitted, then process and store.
+
+    if (!empty($hide) and confirm_sesskey()) {
+        if (!$qtype = get_record("question_types", "name", $hide)) {
+            error("Question type doesn't exist!");
+        }
+        set_field("question_types", "visible", "0", "id", $qtype->id);            // Hide question type
+    }
+
+    if (!empty($show) and confirm_sesskey()) {
+        if (!$qtype = get_record("question_types", "name", $show)) {
+            error("Question type doesn't exist!");
+        }
+        set_field("question_types", "visible", "1", "id", $qtype->id);            // Show question type
+    }
+
+    if (!empty($delete) and confirm_sesskey()) {
+
+        $strqtypename = get_string("qtypename", "qtype_$delete");
+
+        if (empty($confirm)) {
+            notice_yesno(get_string("qtypedeleteconfirm", "admin", $strqtypename), 
+                         "questiontypes.php?delete=$delete&amp;confirm=$delete&amp;sesskey=$USER->sesskey", 
+                         "questiontypes.php");
+            print_footer();
+            exit;
+
+        } else {  // Delete everything!!
+
+            if ($delete == "random") {
+                error("You can not delete the random question type!!");
+            }
+
+            if (!$qtype = get_record("question_types", "name", $delete)) {
+                error("Question type doesn't exist!");
+            }
+
+            // OK, first delete all the questions
+            if ($questions = get_records("quiz_questions", "qtype", $qtype->id)) {
+                foreach ($questions as $question) {
+                    if (! quiz_delete_question($coursemod->id, $coursemod->section)) {
+                        notify("Could not delete the $strqtypename with id = $question->id");
+                    }
+                }
+            }
+
+            // And the qtype entry itself
+            if (!delete_records("question_types", "name", $qtype->name)) {
+                notify("Error occurred while deleting the $strqtypename record from question_types table");
+            }
+
+            // Then the tables themselves
+
+            if ($tables = $db->Metatables()) {
+                $prefix = $CFG->prefix.$qtype->name;
+                foreach ($tables as $table) {
+                    if (strpos($table, $prefix) === 0) {
+                        if (!execute_sql("DROP TABLE $table", false)) {
+                            notify("ERROR: while trying to drop table $table");
+                        }
+                    }
+                }
+            }  
+
+            $a->qtype = $strqtypename;
+            $a->directory = "$CFG->dirroot/qtype/$delete";
+            notice(get_string("qtypedeletefiles", "", $a), "questiontypes.php");
+        }
+    }
+
+/// Get and sort the existing questiontypes
+
+    if (!$qtypes = get_records("question_types")) {
+        error("No question types found!!");        // Should never happen
+    }
+
+    foreach ($qtypes as $qtype) {
+        $strqtypename = get_string("qtypename", "qtype_$qtype->name");
+        $qtypebyname[$strqtypename] = $qtype;
+    }
+    ksort($qtypebyname);
+
+/// Print the table of all questiontypes
+
+    $table->head  = array ($strquestiontype, $strquestions, $strversion, "$strhide/$strshow", $strdelete, $strsettings);
+    $table->align = array ("left", "right", "left", "center", "center", "center");
+    $table->wrap  = array ("nowrap", "", "", "", "","");
+    $table->size  = array ("100%", "10", "10", "10", "10","12");
+    $table->width = "100";
+
+    foreach ($qtypebyname as $qtypename => $qtype) {
+
+        $icon = "<img src=\"$CFG->dirroot/mod/quiz/questiontypes/$qtype->name/icon.gif\" hspace=\"10\" height=\"16\" width=\"16\" border=\"0\" alt=\"\" />";
+
+        if (file_exists("$CFG->dirroot/mod/quiz/questiontypes/$qtype->name/config.html")) {
+            $settings = "<a href=\"questiontype.php?qtype=$qtype->name\">$strsettings</a>";
+        } else {
+            $settings = "";
+        }
+
+        $count = count_records('quiz_questions', 'qtype', $qtype->id);
+
+        $delete = $count ? '' : "<a href=\"questiontypes.php?delete=$qtype->name&amp;sesskey=$USER->sesskey\">$strdelete</a>";
+
+        if ($qtype->visible) {
+            $visible = "<a href=\"questiontypes.php?hide=$qtype->name&amp;sesskey=$USER->sesskey\" title=\"$strhide\">".
+                       "<img src=\"$CFG->pixpath/i/hide.gif\" align=\"middle\" height=\"16\" width=\"16\" border=\"0\" alt=\"\" /></a>";
+            $class = "";
+        } else {
+            $visible = "<a href=\"questiontypes.php?show=$qtype->name&amp;sesskey=$USER->sesskey\" title=\"$strshow\">".
+                       "<img src=\"$CFG->pixpath/i/show.gif\" align=\"middle\" height=\"16\" width=\"16\" border=\"0\" alt=\"\" /></a>";
+            $class = "class=\"dimmed_text\"";
+        }
+        if ($qtype->name == "random") {
+            $delete = "";
+            $visible = "";
+            $class = "";
+        }
+        $table->data[] = array ("<span $class>$icon $qtypename</span>", $count, $qtype->version, $visible, $delete, $settings);
+    }
+    print_table($table);
+
+    echo "<br /><br />";
+
+    print_footer();
+
+?>