<?php 

defined('C5_EXECUTE') or die("Access Denied.");

/**
 * @package Pages
 * @category Concrete
 * @author Andrew Embler <andrew@concrete5.org>
 * @copyright  Copyright (c) 2003-2008 Concrete5. (http://www.concrete5.org)
 * @license    http://www.concrete5.org/license/     MIT License
 *
 */

/**
 * PageStatistics functions as a name space containing functions that return page-level statistics.
 *
 * @package Pages
 * @author Andrew Embler <andrew@concrete5.org>
 * @category Concrete
 * @copyright  Copyright (c) 2003-2008 Concrete5. (http://www.concrete5.org)
 * @license    http://www.concrete5.org/license/     MIT License
 *
 */

class PageStatistics {
	
	/**
	 * Gets total page views across the entire site. 
	 * @param date $date
	 * @return int
	 */
	public static function getTotalPageViews($date = null) {
		$db = Loader::db();
		if ($date != null) {
			return $db->GetOne("select count(pstID) from PageStatistics where date = ?", array($date));
		} else {
			return $db->GetOne("select count(pstID) from PageStatistics");
		}
	}

	/**
	 * Gets total page views for everyone but the passed user object
	 * @param User $u
	 * @param date $date
	 * @return int
	 */
	public static function getTotalPageViewsForOthers($u, $date = null) {
		$db = Loader::db();
		if ($date != null) {
			$v = array($u->getUserID(), $date);
			return $db->GetOne("select count(pstID) from PageStatistics where uID <> ? and date = ?", $v);
		} else {
			$v = array($u->getUserID());
			return $db->GetOne("select count(pstID) from PageStatistics where uID <> ?", $v);
		}
	}

	/**
	 * Gets the total number of versions across all pages. Used in the dashboard.
	 * @todo It might be nice if this were a little more generalized
	 * @return int
	 */
	public static function getTotalPageVersions() {
		$db = Loader::db();
		return $db->GetOne("select count(cvID) from CollectionVersions");
	}
	
	/**
	 * Returns the datetime of the last edit to the site. Used in the dashboard
	 * @return datetime
	 */
	public static function getSiteLastEdit($type = 'system') {
		$db = Loader::db();
		$cDateModified = $db->GetOne("select max(Collections.cDateModified) from Collections");
		if(ENABLE_USER_TIMEZONES && $type == 'user') {
			$dh = Loader::helper('date');
			return $dh->getLocalDateTime($cDateModified);
		} else {
			return $cDateModified;
		}
	}
	
	/**
	 * Gets the total number of pages currently in edit mode
	 * @return int
	 */
	public static function getTotalPagesCheckedOut() {
		$db = Loader::db();
		return $db->GetOne("select count(cID) from Pages where cIsCheckedOut = 1");
	}
	
	
	/** 
	 * For a particular page ID, grabs all the pages of this page, and increments the cTotalChildren number for them
	 */
	public static function incrementParents($cID) {
		$db = Loader::db();
		$cParentID = $db->GetOne("select cParentID from Pages where cID = ?", array($cID));

		$q = "update Pages set cChildren = cChildren+1 where cID = ?";

		$cpc = Page::getByID($cParentID);
		$cpc->refreshCache();

		$r = $db->query($q, array($cParentID));

	}

	/** 
	 * For a particular page ID, grabs all the pages of this page, and decrements the cTotalChildren number for them
	 */
	public static function decrementParents($cID) {
		$db = Loader::db();
		$cParentID = $db->GetOne("select cParentID from Pages where cID = ?", array($cID));

		$q = "update Pages set cChildren = cChildren - 1 where cID = ?";
		
		$cpc = Page::getByID($cParentID);
		$cpc->refreshCache();
		
		$r = $db->query($q, array($cParentID));

	}
}
