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blocks.php
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<?php
// Allows the admin to configure blocks (hide/show, delete and configure)
require_once('../config.php');
require_once($CFG->libdir.'/adminlib.php');
require_once($CFG->libdir.'/tablelib.php');
admin_externalpage_setup('manageblocks');
$confirm = optional_param('confirm', 0, PARAM_BOOL);
$hide = optional_param('hide', 0, PARAM_INT);
$show = optional_param('show', 0, PARAM_INT);
$delete = optional_param('delete', 0, PARAM_INT);
/// Print headings
$strmanageblocks = get_string('manageblocks');
$strdelete = get_string('delete');
$strversion = get_string('version');
$strhide = get_string('hide');
$strshow = get_string('show');
$strsettings = get_string('settings');
$strcourses = get_string('blockinstances', 'admin');
$strname = get_string('name');
$strshowblockcourse = get_string('showblockcourse');
/// If data submitted, then process and store.
if (!empty($hide) && confirm_sesskey()) {
if (!$block = $DB->get_record('block', array('id'=>$hide))) {
print_error('blockdoesnotexist', 'error');
}
$DB->set_field('block', 'visible', '0', array('id'=>$block->id)); // Hide block
admin_get_root(true, false); // settings not required - only pages
}
if (!empty($show) && confirm_sesskey() ) {
if (!$block = $DB->get_record('block', array('id'=>$show))) {
print_error('blockdoesnotexist', 'error');
}
$DB->set_field('block', 'visible', '1', array('id'=>$block->id)); // Show block
admin_get_root(true, false); // settings not required - only pages
}
if (!empty($delete) && confirm_sesskey()) {
admin_externalpage_print_header();
echo $OUTPUT->heading($strmanageblocks);
if (!$block = blocks_get_record($delete)) {
print_error('blockdoesnotexist', 'error');
}
else {
$blockobject = block_instance($block->name);
$strblockname = $blockobject->get_title();
}
if (!$confirm) {
echo $OUTPUT->confirm(get_string('blockdeleteconfirm', '', $strblockname), 'blocks.php?delete='.$block->id.'&confirm=1', 'blocks.php');
echo $OUTPUT->footer();
exit;
} else {
// Inform block it's about to be deleted
$blockobject = block_instance($block->name);
if ($blockobject) {
$blockobject->before_delete(); //only if we can create instance, block might have been already removed
}
// First delete instances and then block
$instances = $DB->get_records('block_instances', array('blockname' => $block->name));
if(!empty($instances)) {
foreach($instances as $instance) {
blocks_delete_instance($instance);
}
}
// Delete block
if (!$DB->delete_records('block', array('id'=>$block->id))) {
echo $OUTPUT->notification("Error occurred while deleting the $strblockname record from blocks table");
}
drop_plugin_tables($block->name, "$CFG->dirroot/blocks/$block->name/db/install.xml", false); // old obsoleted table names
drop_plugin_tables('block_'.$block->name, "$CFG->dirroot/blocks/$block->name/db/install.xml", false);
// Delete the capabilities that were defined by this block
capabilities_cleanup('block/'.$block->name);
// remove entent handlers and dequeue pending events
events_uninstall('block/'.$block->name);
$a->block = $strblockname;
$a->directory = $CFG->dirroot.'/blocks/'.$block->name;
notice(get_string('blockdeletefiles', '', $a), 'blocks.php');
}
}
admin_externalpage_print_header();
echo $OUTPUT->heading($strmanageblocks);
/// Main display starts here
/// Get and sort the existing blocks
if (!$blocks = $DB->get_records('block')) {
print_error('noblocks', 'error'); // Should never happen
}
$incompatible = array();
foreach ($blocks as $block) {
if (($blockobject = block_instance($block->name)) === false) {
// Failed to load
continue;
}
$blockbyname[$blockobject->get_title()] = $block->id;
$blockobjects[$block->id] = $blockobject;
}
if(empty($blockbyname)) {
print_error('failtoloadblocks', 'error');
}
ksort($blockbyname);
/// Print the table of all blocks
$table = new flexible_table('admin-blocks-compatible');
$table->define_columns(array('name', 'instances', 'version', 'hideshow', 'delete', 'settings'));
$table->define_headers(array($strname, $strcourses, $strversion, $strhide.'/'.$strshow, $strdelete, $strsettings));
$table->define_baseurl($CFG->wwwroot.'/'.$CFG->admin.'/blocks.php');
$table->set_attribute('id', 'blocks');
$table->set_attribute('class', 'generaltable generalbox boxaligncenter boxwidthwide');
$table->setup();
foreach ($blockbyname as $blockname => $blockid) {
$blockobject = $blockobjects[$blockid];
$block = $blocks[$blockid];
$delete = '<a href="blocks.php?delete='.$blockid.'&sesskey='.sesskey().'">'.$strdelete.'</a>';
$settings = ''; // By default, no configuration
if ($blockobject->has_config()) {
if (file_exists($CFG->dirroot.'/blocks/'.$block->name.'/settings.php')) {
$settings = '<a href="'.$CFG->wwwroot.'/'.$CFG->admin.'/settings.php?section=blocksetting'.$block->name.'">'.$strsettings.'</a>';
} else {
$settings = '<a href="block.php?block='.$blockid.'">'.$strsettings.'</a>';
}
}
// MDL-11167, blocks can be placed on mymoodle, or the blogs page
// and it should not show up on course search page
$totalcount = $DB->count_records('block_instances', array('blockname'=>$blockname));
$count = $DB->count_records('block_instances', array('blockname'=>$blockname, 'pagetypepattern'=>'course-view-*'));
if ($count>0) {
$blocklist = "<a href=\"{$CFG->wwwroot}/course/search.php?blocklist=$blockid&sesskey=".sesskey()."\" ";
$blocklist .= "title=\"$strshowblockcourse\" >$totalcount</a>";
}
else {
$blocklist = "$totalcount";
}
$class = ''; // Nothing fancy, by default
if ($blocks[$blockid]->visible) {
$visible = '<a href="blocks.php?hide='.$blockid.'&sesskey='.sesskey().'" title="'.$strhide.'">'.
'<img src="'.$OUTPUT->pix_url('i/hide') . '" class="icon" alt="'.$strhide.'" /></a>';
} else {
$visible = '<a href="blocks.php?show='.$blockid.'&sesskey='.sesskey().'" title="'.$strshow.'">'.
'<img src="'.$OUTPUT->pix_url('i/show') . '" class="icon" alt="'.$strshow.'" /></a>';
$class = ' class="dimmed_text"'; // Leading space required!
}
$table->add_data(array(
'<span'.$class.'>'.$blockobject->get_title().'</span>',
$blocklist,
'<span'.$class.'>'.$blockobject->get_version().'</span>',
$visible,
$delete,
$settings
));
}
$table->print_html();
if(!empty($incompatible)) {
echo $OUTPUT->heading(get_string('incompatibleblocks', 'admin'));
$table = new flexible_table('admin-blocks-incompatible');
$table->define_columns(array('block', 'delete'));
$table->define_headers(array($strname, $strdelete));
$table->define_baseurl($CFG->wwwroot.'/'.$CFG->admin.'/blocks.php');
$table->set_attribute('id', 'incompatible');
$table->set_attribute('class', 'generaltable generalbox boxaligncenter boxwidthwide');
$table->setup();
foreach ($incompatible as $block) {
$table->add_data(array(
$block->name,
'<a href="blocks.php?delete='.$block->id.'&sesskey='.sesskey().'">'.$strdelete.'</a>',
));
}
$table->print_html();
}
echo $OUTPUT->footer();