<?php
# $Id$
/**
* Handlers User level alias actions - e.g. add alias, get aliases, update etc.
*/
class AliasHandler {
private $username = null;
/**
* @param string $username
*/
public function __construct($username) {
$this->username = strtolower($username);
}
/**
* @return array - list of email addresses the user's mail is forwarded to.
* (may be an empty list, especially if $CONF['alias_control'] is turned off...)
* @param boolean - by default we don't return special addresses (e.g. vacation and mailbox alias); pass in true here if you wish to.
*/
public function get($all=false) {
$username = escape_string($this->username);
$table_alias = table_by_key('alias');
$sql = "SELECT * FROM $table_alias WHERE address='$username'";
$result = db_query($sql);
if($result['rows'] != 1) {
return false;
}
$row = db_array ($result['result']);
// At the moment Postfixadmin stores aliases in it's database in a comma seperated list; this may change one day.
$list = explode(',', $row['goto']);
if($all) {
$this->return = $list;
return true;
}
$filtered_list = array();
/* if !$all, remove vacation & mailbox aliases */
foreach($list as $address) {
if($address != '' ) {
if($this->is_vacation_address($address) || $this->is_mailbox_alias($address)) {
# TODO: store "vacation_active" and "mailbox" status - should be readable public
}
else {
$filtered_list[] = $address;
}
}
}
$this->return = $filtered_list;
return true;
}
/**
* @param string $address
* @param string $username
* @return boolean true if the username is an alias for the mailbox AND we have alias_control turned off.
* TODO: comment for @return: does alias_control really matter here?
*/
public function is_mailbox_alias($address) {
global $CONF;
if($address != $this->username) { # avoid false positives if $address is a mailbox
return false;
}
$table_mailbox = table_by_key('mailbox');
$E_address = escape_string($address);
$sql = "SELECT * FROM $table_mailbox WHERE username='$E_address'";
$result = db_query($sql);
if($result['rows'] != 1) {
return false;
} else {
return true;
}
}
/**
* @param string $address
* @return boolean true if the address contains the vacation domain
*/
public function is_vacation_address($address) {
global $CONF;
if($CONF['vacation'] == 'YES') {
if(stripos($address, '@' . $CONF['vacation_domain'])) { # TODO: check full vacation address user#domain.com@vacation_domain
return true;
}
}
return false;
}
/**
* @return boolean true on success
* @param string $username
* @param array $addresses - list of aliases to set for the user.
* @param string flags - forward_and_store or remote_only or ''
* @param boolean $vacation_persist - set to false to stop the vacation address persisting across updates
* Set the user's aliases to those provided. If $addresses ends up being empty the alias record is removed. # TODO: deleting that's buggy behaviour, error out instead
*/
public function update($addresses, $flags = '', $vacation_persist=true) {
// find out if the user is on vacation or not; if they are,
// then the vacation alias needs adding to the db (as we strip it out in the get method)
// likewise with the alias_control address.
# TODO: move all validation from edit-alias/create-alias and users/edit-alias here
$valid_flags = array('', 'forward_and_store', 'remote_only');
if(!in_array($flags, $valid_flags)) {
die("Invalid flag passed into update()... : $flag - valid options are :" . implode(',', $valid_flags));
}
$addresses = array_unique($addresses);
list (/*NULL*/, $domain) = explode('@', $this->username);
if ( ! $this->get(true) ) die("Alias not existing?"); # TODO: better error behaviour
foreach($this->return as $address) {
if($vacation_persist) {
if($this->is_vacation_address($address)) {
$addresses[] = $address;
}
}
if($flags != 'remote_only') {
if($this->is_mailbox_alias($address)) {
$addresses[] = $address;
}
}
}
$addresses = array_unique($addresses);
$new_list = array();
if($flags == 'remote_only') {
foreach($addresses as $address) { # TODO: write a remove_from_array function, see http://tech.petegraham.co.uk/2007/03/22/php-remove-values-from-array/
// strip out our username... if it's in the list given.
if($address != $this->username) {
$new_list[] = $address;
}
}
$addresses = $new_list;
}
if($flags == 'forward_and_store') {
if(!in_array($this->username, $addresses)) {
$addresses[] = $this->username;
}
}
$new_list = array();
foreach($addresses as $address) {
if($address != '') {
$new_list[] = $address; # TODO use remove_from_array, see above
}
}
$addresses = array_unique($new_list);
$E_username = escape_string($this->username);
$goto = implode(',', $addresses);
if(sizeof($addresses) == 0) {
# $result = db_delete('alias', 'address', $this->username); # '"DELETE FROM $table_alias WHERE address = '$username'"; # TODO: should never happen and causes broken behaviour
error_log("Alias set to empty / Attemp to delete: " . $this->username); # TODO: more/better error handling - maybe just return false?
}
if($this->hasAliasRecord() == false) { # TODO should never happen in update() - see also the comments on handling DELETE above
$alias_data = array(
'address' => $this->username,
'goto' => $goto,
'domain' => $domain,
'active' => db_get_boolean(True),
);
$result = db_insert('alias', $alias_data);
} else {
$alias_data = array(
'goto' => $goto,
);
$result = db_update('alias', 'address', $this->username, $alias_data);
}
if($result != 1) {
return false;
}
db_log ($domain, 'edit_alias', "$E_username -> $goto");
return true;
}
/**
* Determine whether a local delivery address is present. This is
* stores as an alias with the same name as the mailbox name (username)
* @return boolean true if local delivery is enabled
*/
public function hasStoreAndForward() {
$result = $this->get(true); # TODO: error checking?
if(in_array($this->username, $this->return)) {
return true;
}
return false;
}
/**
* @return boolean true if the user has an alias record (i.e row in alias table); else false.
*/
public function hasAliasRecord() {
$username = escape_string($this->username);
$table_alias = table_by_key('alias');
$sql = "SELECT * FROM $table_alias WHERE address = '$username'";
$result = db_query($sql);
if($result['rows'] == 1) {
return true;
}
return false;
}
/**
* @return true on success false on failure
*/
public function delete(){
if( ! $this->get() ) {
$this->errormsg[] = 'An alias with that address does not exist.'; # TODO: make translatable
return false;
}
if ($this->is_mailbox_alias($this->username) ) {
$this->errormsg[] = 'This alias belongs to a mailbox and can\'t be deleted.'; # TODO: make translatable
return false;
}
$result = db_delete('alias', 'address', $this->username);
if( $result == 1 ) {
list(/*NULL*/,$domain) = explode('@', $this->username);
db_log ($domain, 'delete_alias', $this->username);
return true;
}
}
/**
* @return return value of previously called method
*/
public function result() {
return $this->return;
}
}
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