stronk7
61 lines
2.2 KiB
PHP
61 lines
2.2 KiB
PHP
<?php
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/******************* delete ************************************/
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if (!isteacher($course->id)) {
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error("Only teachers can look at this page");
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}
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confirm_sesskey();
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if (empty($_GET['pageid'])) {
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error("Delete: pageid missing");
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}
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$pageid = required_param('pageid', PARAM_INT);
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if (!$thispage = get_record("lesson_pages", "id", $pageid)) {
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error("Delete: page record not found");
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}
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print_string("deleting", "lesson");
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// first delete all the associated records...
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delete_records("lesson_attempts", "pageid", $pageid);
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// ...now delete the answers...
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delete_records("lesson_answers", "pageid", $pageid);
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// ..and the page itself
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delete_records("lesson_pages", "id", $pageid);
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// repair the hole in the linkage
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if (!$thispage->prevpageid) {
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// this is the first page...
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if (!$page = get_record("lesson_pages", "id", $thispage->nextpageid)) {
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error("Delete: next page not found");
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}
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if (!set_field("lesson_pages", "prevpageid", 0, "id", $page->id)) {
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error("Delete: unable to set prevpage link");
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}
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} elseif (!$thispage->nextpageid) {
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// this is the last page...
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if (!$page = get_record("lesson_pages", "id", $thispage->prevpageid)) {
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error("Delete: prev page not found");
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}
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if (!set_field("lesson_pages", "nextpageid", 0, "id", $page->id)) {
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error("Delete: unable to set nextpage link");
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}
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} else {
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// page is in the middle...
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if (!$prevpage = get_record("lesson_pages", "id", $thispage->prevpageid)) {
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error("Delete: prev page not found");
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}
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if (!$nextpage = get_record("lesson_pages", "id", $thispage->nextpageid)) {
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error("Delete: next page not found");
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}
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if (!set_field("lesson_pages", "nextpageid", $nextpage->id, "id", $prevpage->id)) {
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error("Delete: unable to set next link");
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}
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if (!set_field("lesson_pages", "prevpageid", $prevpage->id, "id", $nextpage->id)) {
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error("Delete: unable to set prev link");
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}
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}
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redirect("view.php?id=$cm->id", get_string('deletedpage', 'lesson'));
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?>
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