<?php
/**
 * All helper functions can be found here
 *
 */

/**
 * Remove the icon of a blog
 *
 * @param ElggBlog $blog The blog to remove the icon from
 *
 * @return bool
 */
function blog_tools_remove_blog_icon(ElggBlog $blog) {
	$result = false;
	
	if (!empty($blog) && elgg_instanceof($blog, "object", "blog", "ElggBlog")) {
		if (!empty($blog->icontime)) {
			$icon_sizes = elgg_get_config("icon_sizes");
			if (!empty($icon_sizes)) {
				$fh = new ElggFile();
				$fh->owner_guid = $blog->getOwnerGUID();
				
				$prefix = "blogs/" . $blog->getGUID();
				
				foreach ($icon_sizes as $name => $info) {
					$fh->setFilename($prefix . $name . ".jpg");
					
					if ($fh->exists()) {
						$fh->delete();
					}
				}
			}
			
			unset($blog->icontime);
			$result = true;
		} else {
			$result = true;
		}
	}
	
	return $result;
}

/**
 * Check a plugin setting for the allowed use of advanced publication options
 *
 * @return bool
 */
function blog_tools_use_advanced_publication_options() {
	static $result;
	
	if (!isset($result)) {
		$result = false;
		
		$setting = elgg_get_plugin_setting("advanced_publication", "blog_tools");
		if ($setting == "yes") {
			$result = true;
		}
	}
	
	return $result;
}

/**
 * Get related blogs to this blog
 *
 * @param ElggBlog $entity the blog to relate to
 * @param int      $limit  number of blogs to return
 *
 * @return bool|ElggBlog[]
 */
function blog_tools_get_related_blogs(ElggBlog $entity, $limit = 4) {
	$result = false;

	$limit = sanitise_int($limit, false);
	
	if (!empty($entity) && elgg_instanceof($entity, "object", "blog")) {
		// transform to values
		$tag_values = $entity->tags;

		if (!empty($tag_values)) {
			if (!is_array($tag_values)) {
				$tag_values = array($tag_values);
			}
			
			// find blogs with these metadatavalues
			$options = array(
				"type" => "object",
				"subtype" => "blog",
				"metadata_name" => "tags",
				"metadata_values" => $tag_values,
				"wheres" => array("(e.guid <> " . $entity->getGUID() . ")"),
				"group_by" => "e.guid",
				"order_by" => "count(msn.id) DESC",
				"limit" => $limit
			);
	
			$result = elgg_get_entities_from_metadata($options);
		}
	}
	
	return $result;
}