Elefant CMS: Dynamic Blocks and Blocks with Fallback

editable.php

/* /apps/blocks/views/editable.php */

<p class="admin-options">
{% if title %}
	{% if locked %}
		<a href="javascript:void(0)" title="{"Editing Locked"}"><img src="/apps/admin/css/admin/lock.png" /></a>
	{% else %}
		<a href="/blocks/edit?id={{ id }}&return={{ $_SERVER.REQUEST_URI }}" title="{"Edit Block"}"><img src="/apps/admin/css/admin/edit.png" /></a><a href="/admin/versions?type=Block&id={{ id }}" title="{"Versions"}"><img src="/apps/admin/css/admin/versions.png" /></a><a href="/blocks/delete?id={{ id }}&return={{ $_SERVER.REQUEST_URI }}" title="{"Delete Block"}" onclick="return confirm  {% if new_id %}('{"Are you sure you want to delete the default block? This will have impact on all other Pages using this default block"}'){% else %} ('{"Are you sure you want to delete the current block?"}') {% end %};"><img src="/apps/admin/css/admin/delete.png" /></a>{% if new_id %}<a href="/blocks/add?id={{ new_id }}&return={{ $_SERVER.REQUEST_URI }}" title="{"Add Block"}" onclick="return confirm ('{"Are you sure you want to overwrite the default block?"}');"><img src="/apps/admin/css/admin/add.png" /></a> {% end %}
	{% end %}
{% else %}
	<a href="/blocks/add?id={{ id }}&return={{ $_SERVER.REQUEST_URI }}" title="{"Add Block"}"><img src="/apps/admin/css/admin/add.png" /></a>
{% end %}
</p>

index.php

<?php

/* /apps/blocks/handlers/index.php */

/**
 * Renders the specified content block. Use in layout templates like this:
 *
 *     {! blocks/my-block-id !}
 *
 * You can also specify a dynamic ID value for your blocks so that a single
 * block position can refer to a dynamic number of blocks, like this:
 *
 *     {! blocks/index?id=[id] !}
 *
 * In the above example, `[id]` is replaced with the current page ID, so
 * that on each page, it will try to render a block in that position with
 * the same ID as the current page.
 *
 * See the API documentation for the Template class for more info on
 * `[expr]` style sub-expressions.
 */

$id = (isset ($this->params[0])) ? $this->params[0] : (isset ($data['id']) ? $data['id'] : false);

$hasDefault = (isset ( $data['hasDefault'])) ? $data['hasDefault'] : false;

if (isset ($data['type']) && isset ($data['id'])){
 	$default_id = "default-" . $data['type'];
	$id .= "-" . $data['type'];
} 

if (! $id) {
	if (User::is_valid () && User::is ('admin')) {
		echo $tpl->render ('blocks/editable', (object) array ('id' => $id, 'locked' => false));
	}
	return;
}

$lock = new Lock ('Block', $id);

$b = new Block ($id);
if ($b->error) {
	
	if ($hasDefault) {
		$b = new Block ($default_id);
		$b->new_id = $id;
	}
	
	if ($b->error) {
		if (User::is_valid () && User::is ('admin')) {
			echo $tpl->render ('blocks/editable', (object) array ('id' => $id, 'locked' => false, 'title' => false));
		}
		return;
	}
}

// permissions
if ($b->access !== 'public') {
	if (! User::require_login ()) {
		return;
	}
	if (! User::access ($b->access)) {
		return;
	}
}

if ($b->show_title == 'yes') {
	printf ('<h3>%s</h3>', $b->title);
}

$b->locked = $lock->exists ();

if (User::is_valid () && User::is ('admin')) {
	echo $tpl->render ('blocks/editable', $b);
}

echo $tpl->run_includes ($b->body);

?>

layout.html

{! blocks/index?id=[id]&type=sidebar&hasDefault=true !}