<?php
function phorum_htmlpurifier_migrate_sigs_check() {
	global $PHORUM;
	$offset = 0;
	if (! empty ( $_POST ['migrate-sigs'] )) {
		if (! isset ( $_POST ['confirmation'] ) || strtolower ( $_POST ['confirmation'] ) !== 'yes') {
			echo 'Invalid confirmation code.';
			exit ();
		}
		$PHORUM ['mod_htmlpurifier'] ['migrate-sigs'] = true;
		phorum_db_update_settings ( array (
				"mod_htmlpurifier" => $PHORUM ["mod_htmlpurifier"] 
		) );
		$offset = 1;
	} elseif (! empty ( $_GET ['migrate-sigs'] ) && $PHORUM ['mod_htmlpurifier'] ['migrate-sigs']) {
		$offset = ( int ) $_GET ['migrate-sigs'];
	}
	return $offset;
}
function phorum_htmlpurifier_migrate_sigs($offset) {
	global $PHORUM;
	
	if (! $offset)
		return; // bail out quick if $offset == 0
			                     
	// theoretically, we could get rid of this multi-request
			                     // doo-hickery if safe mode is off
	@set_time_limit ( 0 ); // attempt to let this run
	$increment = $PHORUM ['mod_htmlpurifier'] ['migrate-sigs-increment'];
	
	require_once (dirname ( __FILE__ ) . '/../migrate.php');
	// migrate signatures
	// do this in batches so we don't run out of time/space
	$end = $offset + $increment;
	$user_ids = array ();
	for($i = $offset; $i < $end; $i ++) {
		$user_ids [] = $i;
	}
	$userinfos = phorum_db_user_get_fields ( $user_ids, 'signature' );
	foreach ( $userinfos as $i => $user ) {
		if (empty ( $user ['signature'] ))
			continue;
		$sig = $user ['signature'];
		// perform standard Phorum processing on the sig
		$sig = str_replace ( array (
				"&",
				"<",
				">" 
		), array (
				"&amp;",
				"&lt;",
				"&gt;" 
		), $sig );
		$sig = preg_replace ( "/<((http|https|ftp):\/\/[a-z0-9;\/\?:@=\&\$\-_\.\+!*'\(\),~%]+?)>/i", "$1", $sig );
		// prepare fake data to pass to migration function
		$fake_data = array (
				array (
						"author" => "",
						"email" => "",
						"subject" => "",
						'body' => $sig 
				) 
		);
		list ( $fake_message ) = phorum_htmlpurifier_migrate ( $fake_data );
		$user ['signature'] = $fake_message ['body'];
		if (! phorum_api_user_save ( $user )) {
			exit ( 'Error while saving user data' );
		}
	}
	unset ( $userinfos ); // free up memory
	                   
	// query for highest ID in database
	$type = $PHORUM ['DBCONFIG'] ['type'];
	$sql = "select MAX(user_id) from {$PHORUM['user_table']}";
	$row = phorum_db_interact ( DB_RETURN_ROW, $sql );
	$top_id = ( int ) $row [0];
	
	$offset += $increment;
	if ($offset > $top_id) { // test for end condition
		echo 'Migration finished';
		$PHORUM ['mod_htmlpurifier'] ['migrate-sigs'] = false;
		phorum_htmlpurifier_commit_settings ();
		return true;
	}
	$host = $_SERVER ['HTTP_HOST'];
	$uri = rtrim ( dirname ( $_SERVER ['PHP_SELF'] ), '/\\' );
	$extra = 'admin.php?module=modsettings&mod=htmlpurifier&migrate-sigs=' . $offset;
	// relies on output buffering to work
	header ( "Location: http://$host$uri/$extra" );
	exit ();
}

// vim: et sw=4 sts=4