<?php

class wpmuSetDomain {

    private $dbConn = false;

    public function __construct() {
        error_reporting(E_ALL);
    }

    public function setDatabaseConnection($host,$user,$password,$db) {
        $host = '127.0.0.1';

        if($user == 'commons') {
            $msg = 'This script will not run on databases named "commons." This is a precaution to prevent it from being run on the production database by mistake';
            die($msg);
        }
        $this->dbConn = mysql_connect($host,$user,$password);
        $this->db = $db;
        mysql_select_db($db,$this->dbConn);
    }

    private function getTables() {
        $q = 'SHOW TABLES FROM '.$this->db;
        $qres = mysql_query($q);
        $tables = array();
        while($row = mysql_fetch_array($qres)) {
            $tables[] = $row[0];
        }
        return $tables;
    }

    private function getFields($table) {
        $q = 'SHOW FIELDS FROM '.$table;
        $qres = mysql_query($q);
        $fields = array();
        while($row = mysql_fetch_assoc($qres)) {
            $type = $row['Type'];
            $typeOk = false;
            if(stristr(strtolower($type),'char')) $typeOk = true;
            elseif(stristr(strtolower($type),'text')) $typeOk = true;
            elseif(stristr(strtolower($type),'blob')) $typeOk = true;
            if($typeOk == true) $fields[] = $row;
        }
        return $fields;
    }

    private function fatalError($msg) {
        print $msg;
        print 'TEST';
        die('EXITING...');
    }

    public function setDomain($oldDomain, $newDomain, $testOnly) {

        if($testOnly) {
            $queryType = 'select';
        } else {
            $queryType = 'replace';
        }

        // get all tables
        $tables = $this->getTables();

        $i = 0;
        foreach($tables as $table) {
            $fields = $this->getFields($table);

            if(count($fields) > 0) {
                print 'Updating table "'.$table.'"'."\n";

                foreach($fields as $field) {
                    $i++;
                    $fieldName = $field['Field'];
                    if($queryType == 'replace') {
                        $q = 'UPDATE '.$table.' SET '.$fieldName.' = REPLACE('.$fieldName.',\''.$oldDomain.'\',\''.$newDomain.'\')';
                        #print $q.'</br>';
                        mysql_query($q);
                    } else {
                        $q = 'SELECT * FROM '.$table.' WHERE '.$fieldName.' REGEXP(\''.$oldDomain.'\')';
                        #print $q.'</br>';
                    }
                }
            }
        }
        if($i > 1000) {
            print 'Executed '.$i.' queries. Wow, that\'s a lot!'."\n";
        } else {
            print 'Executed '.$i.' queries. Heck, that\'s nothing!'."\n";
        }
    }

    public function confirm($oldDomain, $newDomain) {
        require_once('/sites/xcommons/cac-env-config.php');
        echo "\n\n";
        echo "Please confirm that you would like to do the following:\n\n";
        echo "Replace '$oldDomain' in the Wordpress Database [".strtoupper(DB_NAME).'], the BuddyPress Database ['.strtoupper(BBDB_NAME).'] and in the MediaWiki database ['.strtoupper(MW_DB_NAME)."] with '$newDomain'\n";
        echo "\nAre you sure you want me to do this? If so, type 'yes' and press return\n";
        $confirm = trim(fgets(STDIN));
        if($confirm != "yes") die("\n".'You did\'nt say yes! Alas, I am done for.'."\n\n");
    }

    public function doUpdates($oldDomain, $newDomain, $testOnly) {
        // include the configuration file with the local connection constants
        require_once('/sites/xcommons/cac-env-config.php');

        $wpmu = true;
        $bpress = true;
        $mwiki = true;

        // WPMU
        if($wpmu == true) {
            print '######################'."\n";
            print 'Updating WPMU Database: '.DB_NAME."\n";
            print '######################'."\n";
            $this->setDatabaseConnection(DB_HOST,DB_USER,DB_PASSWORD,DB_NAME);
            $this->setDomain($oldDomain,$newDomain,$testOnly);
        }

        // BBPRESS, IF IT'S NOT IN THE SAME DB.
        if($bpress == true && DB_NAME != BBDB_NAME && BBDB_USER && BBDB_PASSWORD && BBDB_NAME) {
            print '######################'."\n";
            print 'Updating BBPress Database: '.BBDB_NAME."\n";
            print '######################'."\n";
            $this->setDatabaseConnection(BBDB_HOST,BBDB_USER,BBDB_PASSWORD,BBDB_NAME);
            $this->setDomain($oldDomain,$newDomain,$testOnly);
        }

        // MEDIAWIKI, IF IT'S NOT IN THE SAME DB.
        if($mwiki == true && MW_DB_NAME != BBDB_NAME && MW_DB_NAME != DB_NAME && MW_DB_SERVER && MW_DB_USER && MW_DB_PASSWORD && MW_DB_NAME) {
            print '######################'."\n";
            print 'Updating MediaWiki Database: '.MW_DB_PASSWORD."\n";
            print '######################'."\n";
            $this->setDatabaseConnection(MW_DB_SERVER,MW_DB_USER,MW_DB_PASSWORD,MW_DB_NAME);
            $this->setDomain($oldDomain,$newDomain,$testOnly);
        }



    }
}

$wpmuSetDomain = new wpmuSetDomain;
echo 'This script replaces all instances of one domain in the commons databases with another domain name.'."\n";

echo 'Enter the domain name that you want to change (press return to accept the default: "commons.gc.cuny.edu"):'."\n";
$oldDomain = trim(fgets(STDIN));
if($oldDomain == '') $oldDomain = 'commons.gc.cuny.edu';

$newDomain = false;

$first = true;
while($newDomain == '') {
    if($first == true) {
        echo 'Enter the domain name that you want to change to:'."\n";
    } else {
        echo 'That\'s not a domain name. Enter the domain name that you want to change to or press ctrl+c to exit'."\n";
    }
    $first = false;
    $newDomain = trim(fgets(STDIN));
}

$wpmuSetDomain->confirm($oldDomain,$newDomain);
$wpmuSetDomain->doUpdates($oldDomain,$newDomain,0);


?>