<?php

/************************************
 * Cadence
 * Remotely Hosted Guestbook Script.
 * (c) 2006, Dennis Pedrie
 * www.CadenceBook.com
 * post.php
 * Last Modified 1-6-06
 ***********************************
 * Cadence Guestbook is licensed under
 * a Creative Commons License.
 * More information is available by visiting
 * http://creativecommons.org/licenses/by/3.0/
 * or the LICENSE file in the Cadence Root Folder
 ***********************************/

/**
* Post Class. Manages Post-Related Functions
*
* @name post
* @package	Cadence Guestbook
* @author   Dennis Pedrie
* @copyright Dennis Pedrie
* @version	1.0
*/

class post {
	
	/**
	 * Checks User's browser
	 *
	 * @name checkbrowser
	 * @author Dennis Pedrie
	 * @version 1.0 BUILD 1000
	 * @return string
	 *
	 **/
	function checkbrowser() {
		global $LANG;
		if (eregi("MSIE",$_SERVER['HTTP_USER_AGENT'])) {
			return $LANG['ie'];
		}
  		if (eregi("Mozilla/5.0",$_SERVER['HTTP_USER_AGENT'])) {
  			return $LANG['firefox'];
  		}
		if (eregi("Opera",$_SERVER['HTTP_USER_AGENT'])) {
			return $LANG['opera'];
		}
		else {
			return $LANG['otherbrowser'];
		}
	}
	
	/**
	 * Cleans variables for use in queries.<br />
	 * If cleaning an integer, use intval($post->clean_var($var)); to be sure that it is in the correct format.
	 *
	 * @name clean_var
	 * @author Dennis Pedrie
	 * @version 1.0 BUILD 1000
	 * @param string Content to Clean
	 * @return string
	 *
	 **/
	
	function clean_var($content,$allowhtml = false)	{
		if(get_magic_quotes_gpc()) {
			$content = stripslashes($content);
		}
		
		$content = (!$allowhtml) ? htmlentities($content,ENT_QUOTES) : $content;
		
		$content = str_replace("--", "-", $content);
		
		return $content;
	}
	
	/**
	 * Returns Post Date in md5.<br />
	 * This is the Post's unique hash, and is used for security purposes.
	 *
	 * @name makehash
	 * @author Dennis Pedrie
	 * @version 1.0 BUILD 1000
	 * @param string Date to Encode
	 * @return string
	 *
	 **/
	
	function makehash($date) {
		$hash = md5($date);
		return $hash;
	}
	
	/**
	 * Check E-Mail.<br />
	 * Makes sure that the E-Mail address is in a valid format, i.e. hide@address.com
	 *
	 * @name check_email
	 * @author Dennis Pedrie
	 * @version 1.0 BUILD 1000
	 * @param string Address to Check.
	 * @return boolean
	 *
	 **/
	function check_email($address) {
  		// check an email address is possibly valid
  		if (ereg('^[a-zA-Z0-9_\.\-]+@[a-zA-Z0-9\-]+\.[a-zA-Z0-9\-\.]+$', $address)) {
    		return true;
  		}
  		else {
    		return false;
  		}
	}
	
	/**
	 * Kill teh swear words!
	 *
	 * @name badwords
	 * @author Dennis Pedrie
	 * @version 1.0 BUILD 1000
	 * @param string Content to Clean Up.
	 * @return string
	 *
	 **/
	function badwords($content) {
		global $db, $q;
		
		$badwords = $db->get_results($q->badwords());
		foreach($badwords as $bw) {
			$content = str_replace($bw->badword, $bw->replacement, "$content");
		}
		
		return $content;
	}
	
	/**
	 * Check that the user hasn't been banned
	 *
	 * @name isbanned
	 * @author Dennis Pedrie
	 * @version 1.0 BUILD 1000
	 * @param string IP Address.
	 * @param string E-Mail Address
	 * @return boolean
	 *
	 **/
	function isbanned($ip,$email) {
		global $book,$db,$q;
		
		//Check IP and E-Mail against DB for matches.
		$banned = $db->get_var($q->isbanned($email,$ip));
		
		
		//Check for Global Ban
		$gban = $db->get_var($q->gban($email,$ip));
		echo $gban;

		//If they're banned, return true.
		if($banned == $book || $gban == 1) {
			return true;
		}
		
		//Otherwise, false.
		else {
			return false;
		}
	}
	
	/**
	  * Return HTML Entities to their corresponding symbols.<br />
	  * i.e. &lt; -> '<', etc.
	  * @name undohtmlentities
	  * @author Dennis Pedrie
	  * @version 1.0 BUILD 1000
	  * @param string Content to Convert.
	  * @return string $content
	  * @since 1.0
	  **/
	
	function undohtmlentities($content) {
		$content = html_entity_decode($content);
		return $content;
	}
}

?>