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1002 lines
42 KiB
PHP
1002 lines
42 KiB
PHP
<?PHP // $Id: lesson.php, v 1.0 25 Jan 2004
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/*************************************************
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ACTIONS handled are:
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addpage
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confirmdelete
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continue
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delete
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editpage
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insertpage
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move
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moveit
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updatepage
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************************************************/
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require("../../config.php");
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require("lib.php");
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require_variable($id); // Course Module ID
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// get some esential stuff...
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if (! $cm = get_record("course_modules", "id", $id)) {
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error("Course Module ID was incorrect");
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}
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if (! $course = get_record("course", "id", $cm->course)) {
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error("Course is misconfigured");
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}
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if (! $lesson = get_record("lesson", "id", $cm->instance)) {
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error("Course module is incorrect");
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}
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require_login($course->id);
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// set up some general variables
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$usehtmleditor = can_use_html_editor();
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$navigation = "";
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if ($course->category) {
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$navigation = "<A HREF=\"../../course/view.php?id=$course->id\">$course->shortname</A> ->";
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}
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$strlessons = get_string("modulenameplural", "lesson");
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$strlesson = get_string("modulename", "lesson");
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$strlessonname = $lesson->name;
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// ... print the header and...
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print_header("$course->shortname: $lesson->name", "$course->fullname",
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"$navigation <A HREF=index.php?id=$course->id>$strlessons</A> ->
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<A HREF=\"view.php?id=$cm->id\">$lesson->name</A> -> $action",
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"", "", true);
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//...get the action
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require_variable($action);
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/************** add page ************************************/
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if ($action == 'addpage' ) {
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if (!isteacher($course->id)) {
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error("Only teachers can look at this page");
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}
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// first get the preceeding page
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$pageid = $_GET['pageid'];
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// set of jump array
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$jump[0] = get_string("thispage", "lesson");
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$jump[LESSON_NEXTPAGE] = get_string("nextpage", "lesson");
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$jump[LESSON_EOL] = get_string("endoflesson", "lesson");
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if (!$apageid = get_field("lesson_pages", "id", "lessonid", $lesson->id, "prevpageid", 0)) {
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error("Add page: first page not found");
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}
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while (true) {
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if ($apageid) {
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$title = get_field("lesson_pages", "title", "id", $apageid);
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$jump[$apageid] = $title;
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$apageid = get_field("lesson_pages", "nextpageid", "id", $apageid);
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} else {
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// last page reached
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break;
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}
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}
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// give teacher a blank proforma
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print_heading_with_help(get_string("addanewpage", "lesson"), "overview", "lesson");
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?>
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<form name="form" method="post" action="lesson.php">
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<input type="hidden" name="id" value="<?PHP echo $cm->id ?>">
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<input type="hidden" name="action" value="insertpage">
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<input type="hidden" name="pageid" value="<?PHP echo $_GET['pageid'] ?>">
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<center><table cellpadding=5 border=1>
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<tr><td align="center">
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<tr valign="top">
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<td><b><?php print_string("pagetitle", "lesson"); ?>:</b><br />
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<input type="text" name="title" size="80" maxsize="255" value=""></td></tr>
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<?PHP
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echo "<tr><td><b>";
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echo get_string("pagecontents", "lesson").":</b><br />\n";
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print_textarea($usehtmleditor, 25,70, 630, 400, "contents");
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echo "</td></tr>\n";
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echo "<tr><td><b>".get_string("questiontype", "lesson").":</b> \n";
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choose_from_menu($LESSON_QUESTION_TYPE, "qtype", LESSON_MULTICHOICE, "");
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helpbutton("questiontype", get_string("questiontype", "lesson"), "lesson");
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echo "<br /><input type=\"checkbox\" name=\"qoption\" value=\"1\"/>";
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echo " <b>".get_string("questionoption", "lesson")."</b>\n";
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helpbutton("questionoption", get_string("questionoption", "lesson"), "lesson");
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echo "</td></tr>\n";
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for ($i = 0; $i < $lesson->maxanswers; $i++) {
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$iplus1 = $i + 1;
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echo "<tr><td><b>".get_string("answer", "lesson")." $iplus1:</b><br />\n";
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print_textarea($usehtmleditor, 20, 70, 630, 300, "answer[$i]");
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echo "</td></tr>\n";
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echo "<tr><td><b>".get_string("response", "lesson")." $iplus1:</b><br />\n";
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print_textarea($usehtmleditor, 20, 70, 630, 300, "response[$i]");
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echo "</td></tr>\n";
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echo "<tr><td><B>".get_string("jumpto", "lesson").":</b> \n";
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if ($i) {
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// answers 2, 3, 4... jumpto this page
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lesson_choose_from_menu($jump, "jumpto[$i]", 0, "");
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} else {
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// answer 1 jumpto next page
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lesson_choose_from_menu($jump, "jumpto[$i]", LESSON_NEXTPAGE, "");
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}
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helpbutton("jumpto", get_string("jumpto", "lesson"), "lesson");
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echo "</td></tr>\n";
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}
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use_html_editor();
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// close table and form
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?>
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</table><br />
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<input type="submit" value="<?php print_string("addanewpage", "lesson") ?>">
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<input type="submit" name="cancel" value="<?php print_string("cancel") ?>">
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</center>
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</form>
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<?PHP
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}
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/******************* confirm delete ************************************/
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elseif ($action == 'confirmdelete' ) {
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if (!isteacher($course->id)) {
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error("Only teachers can look at this page");
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}
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if (empty($_GET['pageid'])) {
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error("Confirm delete: pageid missing");
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}
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$pageid = $_GET['pageid'];
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if (!$thispage = get_record("lesson_pages", "id", $pageid)) {
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error("Confirm delete: the page record not found");
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}
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print_heading(get_string("deletingpage", "lesson", $thispage->title));
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// print the jumps to this page
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if ($answers = get_records_select("lesson_answers", "lessonid = $lesson->id AND jumpto = $pageid + 1")) {
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print_heading(get_string("thefollowingpagesjumptothispage", "lesson"));
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echo "<p align=\"center\">\n";
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foreach ($answers as $answer) {
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if (!$title = get_field("lesson_pages", "title", "id", $answer->pageid)) {
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error("Confirm delete: page title not found");
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}
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echo $title."<br />\n";
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}
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}
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notice_yesno(get_string("confirmdeletionofthispage","lesson"),
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"lesson.php?action=delete&id=$cm->id&pageid=$pageid]",
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"view.php?id=$cm->id");
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}
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/****************** continue ************************************/
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elseif ($action == 'continue' ) {
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// record answer (if necessary) and show response (if none say if answer is correct or not)
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if (empty($_POST['pageid'])) {
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error("Continue: pageid missing");
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}
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$pageid = $_POST['pageid'];
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if (!$page = get_record("lesson_pages", "id", $pageid)) {
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error("Continue: Page record not found");
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}
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// set up some defaults
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$answerid = 0;
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$noanswer = false;
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$correctanswer = false;
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$newpageid = 0; // stay on the page
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switch ($page->qtype) {
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case LESSON_SHORTANSWER :
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if (!$useranswer = $_POST['answer']) {
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$noanswer = true;
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break;
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}
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if (!$answers = get_records("lesson_answers", "pageid", $pageid, "id")) {
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error("Continue: No answers found");
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}
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foreach ($answers as $answer) {
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if (lesson_iscorrect($pageid, $answer->jumpto)) {
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if ($page->qoption) {
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// case sensitive
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if ($answer->answer == $useranswer) {
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$correctanswer = true;
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$newpageid = $answer->jumpto;
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if (trim(strip_tags($answer->response))) {
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$response = $answer->response;
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}
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}
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} else {
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// case insensitive
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if (strcasecmp($answer->answer, $useranswer) == 0) {
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$correctanswer = true;
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$newpageid = $answer->jumpto;
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if (trim(strip_tags($answer->response))) {
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$response = $answer->response;
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}
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}
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}
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} else {
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// see if user typed in any of the wrong answers
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// don't worry about case
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if (strcasecmp($answer->answer, $useranswer) == 0) {
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$newpageid = $answer->jumpto;
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if (trim(strip_tags($answer->response))) {
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$response = $answer->response;
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}
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}
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}
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}
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if (!isset($response)) {
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if ($correctanswer) {
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$response = get_string("thatsthecorrectanswer", "lesson");
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} else {
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$response = get_string("thatsthewronganswer", "lesson");
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}
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}
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break;
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case LESSON_TRUEFALSE :
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if (empty($_POST['answerid'])) {
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$noanswer = true;
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break;
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}
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$answerid = $_POST['answerid'];
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if (!$answer = get_record("lesson_answers", "id", $answerid)) {
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error("Continue: answer record not found");
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}
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if (lesson_iscorrect($pageid, $answer->jumpto)) {
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$correctanswer = true;
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}
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$newpageid = $answer->jumpto;
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if (!$response = trim($answer->response)) {
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if ($correctanswer) {
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$response = get_string("thatsthecorrectanswer", "lesson");
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} else {
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$response = get_string("thatsthewronganswer", "lesson");
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}
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}
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break;
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case LESSON_MULTICHOICE :
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if ($page->qoption) {
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// MULTIANSWER allowed, user's answer is an array
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if (isset($_POST['answer'])) {
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$useranswers = $_POST['answer'];
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} else {
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$noanswer = true;
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break;
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}
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if (!$answers = get_records("lesson_answers", "pageid", $pageid, "id")) {
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error("Continue: No answers found");
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}
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$ncorrect = 0;
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$nhits = 0;
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$correctresponse = '';
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$wrongresponse = '';
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foreach ($answers as $answer) {
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if (lesson_iscorrect($pageid, $answer->jumpto)) {
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$ncorrect++;
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foreach ($useranswers as $key => $answerid) {
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if ($answerid == $answer->id) {
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$nhits++;
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}
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}
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// save the first jumpto page id, may be needed!...
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if (!isset($correctpageid)) {
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// leave in its "raw" state - will converted into a proper page id later
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$correctpageid = $answer->jumpto;
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}
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// ...also save any response from the correct answers...
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if (trim(strip_tags($answer->response))) {
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$correctresponse = $answer->response;
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}
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} else {
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// save the first jumpto page id, may be needed!...
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if (!isset($wrongpageid)) {
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// leave in its "raw" state - will converted into a proper page id later
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$wrongpageid = $answer->jumpto;
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}
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// ...and from the incorrect ones, don't know which to use at this stage
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if (trim(strip_tags($answer->response))) {
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$wrongresponse = $answer->response;
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}
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}
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}
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if ((count($useranswers) == $ncorrect) and ($nhits == $ncorrect)) {
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$correctanswer = true;
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if (!$response = $correctresponse) {
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$response = get_string("thatsthecorrectanswer", "lesson");
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}
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$newpageid = $correctpageid;
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} else {
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if (!$response = $wrongresponse) {
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$response = get_string("thatsthewronganswer", "lesson");
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}
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$newpageid = $wrongpageid;
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}
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} else {
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// only one answer allowed
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if (empty($_POST['answerid'])) {
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$noanswer = true;
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break;
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}
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$answerid = $_POST['answerid'];
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if (!$answer = get_record("lesson_answers", "id", $answerid)) {
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error("Continue: answer record not found");
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}
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if (lesson_iscorrect($pageid, $answer->jumpto)) {
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$correctanswer = true;
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}
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$newpageid = $answer->jumpto;
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if (!$response = trim($answer->response)) {
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if ($correctanswer) {
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$response = get_string("thatsthecorrectanswer", "lesson");
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} else {
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$response = get_string("thatsthewronganswer", "lesson");
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}
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}
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}
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break;
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case LESSON_MATCHING :
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if (isset($_POST['response'])) {
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$response = $_POST['response'];
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} else {
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$noanswer = true;
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break;
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}
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if (!$answers = get_records("lesson_answers", "pageid", $pageid, "id")) {
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error("Continue: No answers found");
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}
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$ncorrect = 0;
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$i = 0;
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foreach ($answers as $answer) {
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if ($answer->response == $response[$answer->id]) {
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$ncorrect++;
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}
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if ($i == 0) {
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$correctpageid = $answer->jumpto;
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}
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if ($i == 1) {
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$wrongpageid = $answer->jumpto;
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}
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$i++;
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}
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if ($ncorrect == count($answers)) {
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$response = get_string("thatsthecorrectanswer", "lesson");
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$newpageid = $correctpageid;
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$correctanswer = true;
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} else {
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$response = get_string("numberofcorrectmatches", "lesson", $ncorrect);
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$newpageid = $wrongpageid;
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}
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break;
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case LESSON_NUMERICAL :
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// set defaults
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$response = '';
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$newpageid = 0;
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if (!$useranswer = (float) $_POST['answer']) {
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$noanswer = true;
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break;
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}
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if (!$answers = get_records("lesson_answers", "pageid", $pageid, "id")) {
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error("Continue: No answers found");
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}
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foreach ($answers as $answer) {
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if (strpos($answer->answer, ':')) {
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// there's a pairs of values
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list($min, $max) = explode(':', $answer->answer);
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$minimum = (float) $min;
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$maximum = (float) $max;
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} else {
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// there's only one value
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$minimum = (float) $answer->answer;
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$maximum = $minimum;
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}
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if (($useranswer >= $minimum) and ($useranswer <= $maximum)) {
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$newpageid = $answer->jumpto;
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$response = trim($answer->response);
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if (lesson_iscorrect($pageid, $newpageid)) {
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$correctanswer = true;
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}
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break;
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}
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}
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if ($correctanswer) {
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if (!$response) {
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$response = get_string("thatsthecorrectanswer", "lesson");
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}
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} else {
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if (!$response) {
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$response = get_string("thatsthewronganswer", "lesson");
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}
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}
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break;
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}
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if ($noanswer) {
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$newpageid = $pageid; // display same page again
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print_simple_box(get_string("noanswer", "lesson"), "center");
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} else {
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$ntries = count_records("lesson_grades", "lessonid", $lesson->id, "userid", $USER->id);
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if (isstudent($course->id)) {
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// record student's attempt
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$attempt->lessonid = $lesson->id;
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$attempt->pageid = $pageid;
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$attempt->userid = $USER->id;
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$attempt->answerid = $answerid;
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$attempt->retry = $ntries;
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$attempt->correct = $correctanswer;
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$attempt->timeseen = time();
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if (!$newattemptid = insert_record("lesson_attempts", $attempt)) {
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error("Continue: attempt not inserted");
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}
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if (!$correctanswer and ($newpageid == 0)) {
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// wrong answer and student is stuck on this page - check how many attempts
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// the student has had at this page/question
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$nattempts = count_records("lesson_attempts", "pageid", $pageid, "userid", $USER->id,
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"retry", $ntries);
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if ($nattempts >= $lesson->maxattempts) {
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print_heading(get_string("maximumnumberofattempts", "lesson")."<br />".
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get_string("movingtonextpage", "lesson"));
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$newpageid = LESSON_NEXTPAGE;
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}
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}
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}
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// convert jumpto page into a proper page id
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if ($newpageid == 0) {
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$newpageid = $pageid;
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} elseif ($newpageid == LESSON_NEXTPAGE) {
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if ($lesson->nextpagedefault) {
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// in Flash Card mode...
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// ... first get the page ids (lessonid the 5th param is needed to make get_records play)
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$allpages = get_records("lesson_pages", "lessonid", $lesson->id, "id", "id,lessonid");
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shuffle ($allpages);
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$found = false;
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if ($lesson->nextpagedefault == LESSON_UNSEENPAGE) {
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foreach ($allpages as $thispage) {
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if (!count_records("lesson_attempts", "pageid", $thispage->id, "userid",
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$USER->id, "retry", $ntries)) {
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$found = true;
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break;
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}
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}
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} elseif ($lesson->nextpagedefault == LESSON_UNANSWEREDPAGE) {
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foreach ($allpages as $thispage) {
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if (!count_records_select("lesson_attempts", "pageid = $thispage->id AND
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userid = $USER->id AND correct = 1 AND retry = $ntries")) {
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$found = true;
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break;
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}
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}
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}
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if ($found) {
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$newpageid = $thispage->id;
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if ($lesson->maxpages) {
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// check number of pages viewed (in the lesson)
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if (count_records("lesson_attempts", "lessonid", $lesson->id, "userid", $USER->id,
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"retry", $ntries) >= $lesson->maxpages) {
|
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$newpageid = LESSON_EOL;
|
|
}
|
|
}
|
|
} else {
|
|
$newpageid = LESSON_EOL;
|
|
}
|
|
} elseif (!$newpageid = $page->nextpageid) {
|
|
// no nextpage go to end of lesson
|
|
$newpageid = LESSON_EOL;
|
|
}
|
|
}
|
|
|
|
// display response (if there is one - there should be!)
|
|
if ($response) {
|
|
$title = get_field("lesson_pages", "title", "id", $pageid);
|
|
print_heading($title);
|
|
echo "<table width=\"80%\" border=\"0\" align=\"center\"><tr><td>\n";
|
|
print_simple_box(format_text($response), 'center');
|
|
echo "</td></tr></table>\n";
|
|
}
|
|
}
|
|
echo "<form name=\"pageform\" method =\"post\" action=\"view.php\">\n";
|
|
echo "<input type=\"hidden\" name=\"id\" value=\"$cm->id\">\n";
|
|
echo "<input type=\"hidden\" name=\"action\" value=\"navigation\">\n";
|
|
echo "<input type=\"hidden\" name=\"pageid\" value=\"$newpageid\">\n";
|
|
echo "<p align=\"center\"><input type=\"submit\" name=\"continue\" value=\"".
|
|
get_string("continue", "lesson")."\"></p>\n";
|
|
echo "</form>\n";
|
|
}
|
|
|
|
|
|
|
|
/******************* delete ************************************/
|
|
elseif ($action == 'delete' ) {
|
|
|
|
if (!isteacher($course->id)) {
|
|
error("Only teachers can look at this page");
|
|
}
|
|
|
|
if (empty($_GET['pageid'])) {
|
|
error("Delete: pageid missing");
|
|
}
|
|
$pageid = $_GET['pageid'];
|
|
if (!$thispage = get_record("lesson_pages", "id", $pageid)) {
|
|
error("Delete: page record not found");
|
|
}
|
|
|
|
print_string("deleting", "lesson");
|
|
// first delete all the associated records...
|
|
delete_records("lesson_attempts", "pageid", $pageid);
|
|
// ...now delete the answers...
|
|
delete_records("lesson_answers", "pageid", $pageid);
|
|
// ..and the page itself
|
|
delete_records("lesson_pages", "id", $pageid);
|
|
|
|
// repair the hole in the linkage
|
|
if (!$thispage->prevpageid) {
|
|
// this is the first page...
|
|
if (!$page = get_record("lesson_pages", "id", $thispage->nextpageid)) {
|
|
error("Delete: next page not found");
|
|
}
|
|
if (!set_field("lesson_pages", "prevpageid", 0, "id", $page->id)) {
|
|
error("Delete: unable to set prevpage link");
|
|
}
|
|
} elseif (!$thispage->nextpageid) {
|
|
// this is the last page...
|
|
if (!$page = get_record("lesson_pages", "id", $thispage->prevpageid)) {
|
|
error("Delete: prev page not found");
|
|
}
|
|
if (!set_field("lesson_pages", "nextpageid", 0, "id", $page->id)) {
|
|
error("Delete: unable to set nextpage link");
|
|
}
|
|
} else {
|
|
// page is in the middle...
|
|
if (!$prevpage = get_record("lesson_pages", "id", $thispage->prevpageid)) {
|
|
error("Delete: prev page not found");
|
|
}
|
|
if (!$nextpage = get_record("lesson_pages", "id", $thispage->nextpageid)) {
|
|
error("Delete: next page not found");
|
|
}
|
|
if (!set_field("lesson_pages", "nextpageid", $nextpage->id, "id", $prevpage->id)) {
|
|
error("Delete: unable to set next link");
|
|
}
|
|
if (!set_field("lesson_pages", "prevpageid", $prevpage->id, "id", $nextpage->id)) {
|
|
error("Delete: unable to set prev link");
|
|
}
|
|
}
|
|
redirect("view.php?id=$cm->id", get_string("ok"));
|
|
}
|
|
|
|
|
|
|
|
/************** edit page ************************************/
|
|
elseif ($action == 'editpage' ) {
|
|
|
|
if (!isteacher($course->id)) {
|
|
error("Only teachers can look at this page");
|
|
}
|
|
|
|
// get the page
|
|
if (!$page = get_record("lesson_pages", "id", $_GET['pageid'])) {
|
|
error("Edit page: page record not found");
|
|
}
|
|
// set of jump array
|
|
$jump[0] = get_string("thispage", "lesson");
|
|
$jump[LESSON_NEXTPAGE] = get_string("nextpage", "lesson");
|
|
$jump[LESSON_EOL] = get_string("endoflesson", "lesson");
|
|
if (!$apageid = get_field("lesson_pages", "id", "lessonid", $lesson->id, "prevpageid", 0)) {
|
|
error("Edit page: first page not found");
|
|
}
|
|
while (true) {
|
|
if ($apageid) {
|
|
$title = get_field("lesson_pages", "title", "id", $apageid);
|
|
$jump[$apageid] = $title;
|
|
$apageid = get_field("lesson_pages", "nextpageid", "id", $apageid);
|
|
} else {
|
|
// last page reached
|
|
break;
|
|
}
|
|
}
|
|
|
|
// give teacher a proforma
|
|
?>
|
|
<form name="form" method="post" action="lesson.php">
|
|
<input type="hidden" name="id" value="<?PHP echo $cm->id ?>">
|
|
<input type="hidden" name="action" value="updatepage">
|
|
<input type="hidden" name="pageid" value="<?PHP echo $_GET['pageid'] ?>">
|
|
<center><table cellpadding=5 border=1>
|
|
<tr><td align="center">
|
|
<tr valign="top">
|
|
<td><b><?php print_string("pagetitle", "lesson"); ?>:</b><br />
|
|
<input type="text" name="title" size="80" maxsize="255" value="<?PHP echo $page->title ?>"></td>
|
|
</tr>
|
|
<?PHP
|
|
echo "<tr><td><b>";
|
|
echo get_string("pagecontents", "lesson").":</b><br />\n";
|
|
print_textarea($usehtmleditor, 25, 70, 630, 400, "contents", $page->contents);
|
|
echo "</td></tr>\n";
|
|
$n = 0;
|
|
echo "<tr><td><b>".get_string("questiontype", "lesson").":</b> \n";
|
|
choose_from_menu($LESSON_QUESTION_TYPE, "qtype", $page->qtype, "");
|
|
switch ($page->qtype) {
|
|
case LESSON_SHORTANSWER :
|
|
echo " ";
|
|
if ($page->qoption) {
|
|
echo "<input type=\"checkbox\" name=\"qoption\" value=\"1\" checked=\"checked\"/>";
|
|
} else {
|
|
echo "<input type=\"checkbox\" name=\"qoption\" value=\"1\"/>";
|
|
}
|
|
echo " <b>".get_string("casesensitive", "lesson")."</b>\n";
|
|
break;
|
|
case LESSON_MULTICHOICE :
|
|
echo " ";
|
|
if ($page->qoption) {
|
|
echo "<input type=\"checkbox\" name=\"qoption\" value=\"1\" checked=\"checked\"/>";
|
|
} else {
|
|
echo "<input type=\"checkbox\" name=\"qoption\" value=\"1\"/>";
|
|
}
|
|
echo " <b>".get_string("morethanoneanswer", "lesson")."</b>\n";
|
|
break;
|
|
}
|
|
helpbutton("questiontypes", get_string("questiontype", "lesson"), "lesson");
|
|
echo "</td></tr>\n";
|
|
if ($answers = get_records("lesson_answers", "pageid", $page->id, "id")) {
|
|
foreach ($answers as $answer) {
|
|
$nplus1 = $n + 1;
|
|
echo "<input type=\"hidden\" name=\"answerid[$n]\" value=\"$answer->id\">\n";
|
|
echo "<tr><td><b>".get_string("answer", "lesson")." $nplus1:</b><br />\n";
|
|
print_textarea($usehtmleditor, 20, 70, 630, 300, "answer[$n]", $answer->answer);
|
|
echo "</td></tr>\n";
|
|
echo "<tr><td><b>".get_string("response", "lesson")." $nplus1:</b><br />\n";
|
|
print_textarea($usehtmleditor, 20, 70, 630, 300, "response[$n]", $answer->response);
|
|
echo "</td></tr>\n";
|
|
echo "<tr><td><b>".get_string("jumpto", "lesson").":</b> \n";
|
|
lesson_choose_from_menu($jump, "jumpto[$n]", $answer->jumpto, "");
|
|
helpbutton("jumpto", get_string("jumpto", "lesson"), "lesson");
|
|
echo "</td></tr>\n";
|
|
$n++;
|
|
}
|
|
}
|
|
for ($i = $n; $i < $lesson->maxanswers; $i++) {
|
|
$iplus1 = $i + 1;
|
|
echo "<input type=\"hidden\" name=\"answerid[$i]\" value=\"0\">\n";
|
|
echo "<tr><td><b>".get_string("answer", "lesson")." $iplus1:</b><br />\n";
|
|
print_textarea($usehtmleditor, 20, 70, 630, 300, "answer[$i]");
|
|
echo "</td></tr>\n";
|
|
echo "<tr><td><b>".get_string("response", "lesson")." $iplus1:</b><br />\n";
|
|
print_textarea($usehtmleditor, 20, 70, 630, 300, "response[$i]");
|
|
echo "</td></tr>\n";
|
|
echo "<tr><td><B>".get_string("jumpto", "lesson").":</b> \n";
|
|
lesson_choose_from_menu($jump, "jumpto[$i]", 0, "");
|
|
helpbutton("jumpto", get_string("jumpto", "lesson"), "lesson");
|
|
echo "</td></tr>\n";
|
|
}
|
|
use_html_editor();
|
|
// close table and form
|
|
?>
|
|
</table><br />
|
|
<input type="submit" value="<?php print_string("savepage", "lesson") ?>">
|
|
<input type="submit" name="cancel" value="<?php print_string("cancel") ?>">
|
|
</center>
|
|
</form>
|
|
<?PHP
|
|
}
|
|
|
|
|
|
/****************** insert page ************************************/
|
|
elseif ($action == 'insertpage' ) {
|
|
|
|
if (!isteacher($course->id)) {
|
|
error("Only teachers can look at this page");
|
|
}
|
|
|
|
$timenow = time();
|
|
$form = (object) $HTTP_POST_VARS;
|
|
|
|
if ($form->pageid) {
|
|
// the new page is not the first page
|
|
if (!$page = get_record("lesson_pages", "id", $form->pageid)) {
|
|
error("Insert page: page record not found");
|
|
}
|
|
$newpage->lessonid = $lesson->id;
|
|
$newpage->prevpageid = $form->pageid;
|
|
$newpage->nextpageid = $page->nextpageid;
|
|
$newpage->timecreated = $timenow;
|
|
$newpage->qtype = $form->qtype;
|
|
if (isset($form->qoption)) {
|
|
$newpage->qoption = $form->qoption;
|
|
} else {
|
|
$newpage->qoption = 0;
|
|
}
|
|
$newpage->title = $form->title;
|
|
$newpage->contents = trim($form->contents);
|
|
$newpageid = insert_record("lesson_pages", $newpage);
|
|
if (!$newpageid) {
|
|
error("Insert page: new page not inserted");
|
|
}
|
|
// update the linked list
|
|
if (!set_field("lesson_pages", "nextpageid", $newpageid, "id", $form->pageid)) {
|
|
error("Insert page: unable to update link");
|
|
}
|
|
} else {
|
|
// new page is the first page
|
|
// get the existing (first) page (if any)
|
|
if (!$page = get_record_select("lesson_pages", "lessonid = $lesson->id AND prevpageid = 0")) {
|
|
// there are no existing pages
|
|
$newpage->lessonid = $lesson->id;
|
|
$newpage->prevpageid = 0; // this is a first page
|
|
$newpage->nextpageid = 0; // this is the only page
|
|
$newpage->timecreated = $timenow;
|
|
$newpage->qtype = $form->qtype;
|
|
if (isset($form->qoption)) {
|
|
$newpage->qoption = $form->qoption;
|
|
} else {
|
|
$newpage->qoption = 0;
|
|
}
|
|
$newpage->title = $form->title;
|
|
$newpage->contents = trim($form->contents);
|
|
$newpageid = insert_record("lesson_pages", $newpage);
|
|
if (!$newpageid) {
|
|
error("Insert page: new first page not inserted");
|
|
}
|
|
} else {
|
|
// there are existing pages put this at the start
|
|
$newpage->lessonid = $lesson->id;
|
|
$newpage->prevpageid = 0; // this is a first page
|
|
$newpage->nextpageid = $page->id;
|
|
$newpage->timecreated = $timenow;
|
|
$newpage->qtype = $form->qtype;
|
|
if (isset($form->qoption)) {
|
|
$newpage->qoption = $form->qoption;
|
|
} else {
|
|
$newpage->qoption = 0;
|
|
}
|
|
$newpage->title = $form->title;
|
|
$newpage->contents = trim($form->contents);
|
|
$newpageid = insert_record("lesson_pages", $newpage);
|
|
if (!$newpageid) {
|
|
error("Insert page: first page not inserted");
|
|
}
|
|
// update the linked list
|
|
if (!set_field("lesson_pages", "prevpageid", $newpageid, "id", $page->id)) {
|
|
error("Insert page: unable to update link");
|
|
}
|
|
}
|
|
}
|
|
// now add the answers
|
|
for ($i = 0; $i < $lesson->maxanswers; $i++) {
|
|
if (trim(strip_tags($form->answer[$i]))) { // strip_tags because the HTML editor adds <p><br />...
|
|
$newanswer->lessonid = $lesson->id;
|
|
$newanswer->pageid = $newpageid;
|
|
$newanswer->timecreated = $timenow;
|
|
$newanswer->answer = trim($form->answer[$i]);
|
|
$newanswer->response = trim($form->response[$i]);
|
|
if (isset($form->jumpto[$i])) {
|
|
$newanswer->jumpto = $form->jumpto[$i];
|
|
}
|
|
$newanswerid = insert_record("lesson_answers", $newanswer);
|
|
if (!$newanswerid) {
|
|
error("Insert Page: answer record $i not inserted");
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
redirect("view.php?id=$cm->id", get_string("ok"));
|
|
}
|
|
|
|
|
|
/****************** move ************************************/
|
|
elseif ($action == 'move') {
|
|
|
|
if (!isteacher($course->id)) {
|
|
error("Only teachers can look at this page");
|
|
}
|
|
|
|
$pageid = $_GET['pageid'];
|
|
$title = get_field("lesson_pages", "title", "id", $pageid);
|
|
print_heading(get_string("moving", "lesson", $title));
|
|
|
|
if (!$page = get_record_select("lesson_pages", "lessonid = $lesson->id AND prevpageid = 0")) {
|
|
error("Move: first page not found");
|
|
}
|
|
|
|
echo "<center><table cellpadding=\"5\" border=\"1\">\n";
|
|
echo "<tr><td><a href=\"lesson.php?id=$cm->id&action=moveit&pageid=$pageid&after=0\"><small>".
|
|
get_string("movepagehere", "lesson")."</small></a></td></tr>\n";
|
|
while (true) {
|
|
if ($page->id != $pageid) {
|
|
echo "<tr><td bgcolor=\"$THEME->cellheading2\"><b>$page->title</b></td></tr>\n";
|
|
echo "<tr><td><a href=\"lesson.php?id=$cm->id&action=moveit&pageid=$pageid&after={$page->id}\"><small>".
|
|
get_string("movepagehere", "lesson")."</small></a></td></tr>\n";
|
|
}
|
|
if ($page->nextpageid) {
|
|
if (!$page = get_record("lesson_pages", "id", $page->nextpageid)) {
|
|
error("Teacher view: Next page not found!");
|
|
}
|
|
} else {
|
|
// last page reached
|
|
break;
|
|
}
|
|
}
|
|
echo "</table>\n";
|
|
}
|
|
|
|
|
|
/****************** moveit ************************************/
|
|
elseif ($action == 'moveit') {
|
|
|
|
if (!isteacher($course->id)) {
|
|
error("Only teachers can look at this page");
|
|
}
|
|
|
|
$pageid = $_GET['pageid']; // page to move
|
|
if (!$page = get_record("lesson_pages", "id", $pageid)) {
|
|
error("Moveit: page not found");
|
|
}
|
|
$after = $_GET['after']; // target page
|
|
|
|
print_heading(get_string("moving", "lesson", $page->title));
|
|
|
|
// first step. determine the new first page
|
|
// (this is done first as the current first page will be lost in the next step)
|
|
if (!$after) {
|
|
// the moved page is the new first page
|
|
$newfirstpageid = $pageid;
|
|
// reset $after so that is points to the last page
|
|
// (when the pages are in a ring this will in effect be the first page)
|
|
if ($page->nextpageid) {
|
|
if (!$after = get_field("lesson_pages", "id", "lessonid", $lesson->id, "nextpageid", 0)) {
|
|
error("Moveit: last page id not found");
|
|
}
|
|
} else {
|
|
// the page being moved is the last page, so the new last page will be
|
|
$after = $page->prevpageid;
|
|
}
|
|
} elseif (!$page->prevpageid) {
|
|
// the page to be moved was the first page, so the following page must be the new first page
|
|
$newfirstpageid = $page->nextpageid;
|
|
} else {
|
|
// the current first page remains the first page
|
|
if (!$newfirstpageid = get_field("lesson_pages", "id", "lessonid", $lesson->id, "prevpageid", 0)) {
|
|
error("Moveit: current first page id not found");
|
|
}
|
|
}
|
|
// the rest is all unconditional...
|
|
|
|
// second step. join pages into a ring
|
|
if (!$firstpageid = get_field("lesson_pages", "id", "lessonid", $lesson->id, "prevpageid", 0)) {
|
|
error("Moveit: firstpageid not found");
|
|
}
|
|
if (!$lastpageid = get_field("lesson_pages", "id", "lessonid", $lesson->id, "nextpageid", 0)) {
|
|
error("Moveit: lastpage not found");
|
|
}
|
|
if (!set_field("lesson_pages", "prevpageid", $lastpageid, "id", $firstpageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
if (!set_field("lesson_pages", "nextpageid", $firstpageid, "id", $lastpageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
|
|
// third step. remove the page to be moved
|
|
if (!$prevpageid = get_field("lesson_pages", "prevpageid", "id", $pageid)) {
|
|
error("Moveit: prevpageid not found");
|
|
}
|
|
if (!$nextpageid = get_field("lesson_pages", "nextpageid", "id", $pageid)) {
|
|
error("Moveit: nextpageid not found");
|
|
}
|
|
if (!set_field("lesson_pages", "nextpageid", $nextpageid, "id", $prevpageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
if (!set_field("lesson_pages", "prevpageid", $prevpageid, "id", $nextpageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
|
|
// fourth step. insert page to be moved in new place...
|
|
if (!$nextpageid = get_field("lesson_pages", "nextpageid", "id", $after)) {
|
|
error("Movit: nextpageid not found");
|
|
}
|
|
if (!set_field("lesson_pages", "nextpageid", $pageid, "id", $after)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
if (!set_field("lesson_pages", "prevpageid", $pageid, "id", $nextpageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
// ...and set the links in the moved page
|
|
if (!set_field("lesson_pages", "prevpageid", $after, "id", $pageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
if (!set_field("lesson_pages", "nextpageid", $nextpageid, "id", $pageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
|
|
// fifth step. break the ring
|
|
if (!$newlastpageid = get_field("lesson_pages", "prevpageid", "id", $newfirstpageid)) {
|
|
error("Moveit: newlastpageid not found");
|
|
}
|
|
if (!set_field("lesson_pages", "prevpageid", 0, "id", $newfirstpageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
if (!set_field("lesson_pages", "nextpageid", 0, "id", $newlastpageid)) {
|
|
error("Moveit: unable to update link");
|
|
}
|
|
redirect("view.php?id=$cm->id", get_string("ok"));
|
|
}
|
|
|
|
|
|
/****************** update page ************************************/
|
|
elseif ($action == 'updatepage' ) {
|
|
|
|
if (!isteacher($course->id)) {
|
|
error("Only teachers can look at this page");
|
|
}
|
|
|
|
$timenow = time();
|
|
$form = (object) $HTTP_POST_VARS;
|
|
|
|
$page->id = $form->pageid;
|
|
$page->timemodified = $timenow;
|
|
$page->qtype = $form->qtype;
|
|
if (isset($form->qoption)) {
|
|
$page->qoption = $form->qoption;
|
|
} else {
|
|
$page->qoption = 0;
|
|
}
|
|
$page->title = $form->title;
|
|
$page->contents = trim($form->contents);
|
|
if (!update_record("lesson_pages", $page)) {
|
|
error("Update page: page not updated");
|
|
}
|
|
for ($i = 0; $i < $lesson->maxanswers; $i++) {
|
|
if (trim(strip_tags($form->answer[$i]))) { // strip_tags because the HTML gives <p><br />...
|
|
if ($form->answerid[$i]) {
|
|
$oldanswer->id = $form->answerid[$i];
|
|
$oldanswer->timemodified = $timenow;
|
|
$oldanswer->answer = trim($form->answer[$i]);
|
|
$oldanswer->response = trim($form->response[$i]);
|
|
$oldanswer->jumpto = $form->jumpto[$i];
|
|
if (!update_record("lesson_answers", $oldanswer)) {
|
|
error("Update page: answer $i not updated");
|
|
}
|
|
} else {
|
|
// it's a new answer
|
|
$newanswer->lessonid = $lesson->id;
|
|
$newanswer->pageid = $page->id;
|
|
$newanswer->timecreated = $timenow;
|
|
$newanswer->answer = trim($form->answer[$i]);
|
|
$newanswer->response = trim($form->response[$i]);
|
|
$newanswer->jumpto = $form->jumpto[$i];
|
|
$newanswerid = insert_record("lesson_answers", $newanswer);
|
|
if (!$newanswerid) {
|
|
error("Update page: answer record not inserted");
|
|
}
|
|
}
|
|
} else {
|
|
if ($form->answerid[$i]) {
|
|
// need to delete blanked out answer
|
|
if (!delete_records("lesson_answers", "id", $form->answerid[$i])) {
|
|
error("Update page: unable to delete answer record");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
redirect("view.php?id=$cm->id", get_string("ok"));
|
|
}
|
|
|
|
|
|
/*************** no man's land **************************************/
|
|
else {
|
|
error("Fatal Error: Unknown Action: ".$action."\n");
|
|
}
|
|
|
|
print_footer($course);
|
|
|
|
?>
|
|
|