<?php
/*****************************************************************************

    phpCF - Copyright 2005 Anders K. Madsen <madsen@lillesvin.net>

    This file is part of phpCF.

    phpCF is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    phpCF is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with phpCF; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

*****************************************************************************/
    
require_once 'phpCF.config.php';

// Define a couple of constants.
define("PHPCF_VERSION",     "0.3.5");
define("DEBUG",             true);

@ini_set('user_agent', "phpCF/".PHPCF_VERSION." (http://freshmeat.net/projects/phpcf/)");

class CFBase
{
    var $error = array();
    var $log = array();
    var $score;

    // For debugging purposes only!
    var $debug = "";

    // Main methods.
    function CFBase($text, $email = false, $ip = false)
    {
        $this->score = $this->scan($text, $email, $ip);
    }

    function isSpam()
    {
        global $SPAM_THRESHOLD;
        if ($this->score > $SPAM_THRESHOLD) {
            return true;
        } else {
            return false;
        }
    }
    
    function scan($text, $email = false, $ip = false)
    {
        $points = 0.0;
        $checks = $this->availableChecks();
        foreach ($checks as $c) {
            if (method_exists($this, "c_" . $c)) {
                $funct = "c_$c";
                $points += $this->$funct($text);
            } else {
                $this->error[] = "\"$c\": No such checking method.";
            }
        }

        if ($email != false && !empty($email) && is_string($email)) {
            $email_checks = $this->availableEmailChecks();
            foreach ($email_checks as $ec) {
                if (method_exists($this, "ec_" . $ec)) {
                    $funct = "ec_$ec";
                    $points += $this->$funct($email);
                } else {
                    $this->error[] = "\"$ec\": No such email checking method.";
                }
            }
        }

        if ($ip != false && !empty($ip) && is_string($ip)) {
            $ip_checks = $this->availableIpChecks();
            foreach ($ip_checks as $ic) {
                if (method_exists($this, "ic_" . $ic)) {
                    $funct = "ic_$ic";
                    $points += $this->$funct($ip);
                } else {
                    $this->error[] = "\"$ic\": No such IP checking method.";
                }
            }
        }

        return $points;
    }

    // Error functions.
    function hasError()
    {
        if (!empty($this->error)) {
            return true;
        } else {
            return false;
        }
    }
    function printErrorList()
    {
        if (!empty($this->error)) {
            echo "<ul>\n";
            foreach ($this->error as $e) {
                echo "<li>$e</li>\n";
            }
            echo "</ul>\n";
        }
    }
    function getLastError()
    {
        if (!empty($this->error) && is_array($this->error)) {
            return $this->error[count($this->error) - 1];
        }
    }

    // Logging functions.
    function printLog()
    {
        if (!empty($this->log)) {
            echo "<ul>\n";
            foreach ($this->log as $l) {
                echo "<li>$l</li>\n";
            }
            echo "</ul>\n";
        }
    }

    function availableChecks()
    {
        $ret = array();
        foreach (get_class_methods($this) as $m) {
            if (preg_match("/^c_/", $m)) {
                $ret[] = preg_replace("/^(c_)(.+)$/", "\\2", $m);
            }
        }
        return $ret;
    }
    function availableEmailChecks()
    {
        $ret = array();
        foreach (get_class_methods($this) as $m) {
            if (preg_match("/^ec_/", $m)) {
                $ret[] = preg_replace("/^(ec_)(.+)$/", "\\2", $m);
            }
        }
        return $ret;
    }
    function availableIpChecks()
    {
        $ret = array();
        foreach (get_class_methods($this) as $m) {
            if (preg_match("/^ic_/", $m)) {
                $ret[] = preg_replace("/^(ic_)(.+)$/", "\\2", $m);
            }
        }
        return $ret;
    }
    function getThreshold()
    {
        global $SPAM_THRESHOLD;
        return $SPAM_THRESHOLD;
    }

    // Debugging methods
    function debug($txt)
    {
        if (DEBUG) {
            $this->debug .= $txt . "\n";
        }
    }

    function getDebugInfo()
    {
        return $this->debug;
    }
}
?>