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path: root/plugins/virtuser_file/virtuser_file.php
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<?php

/**
 * File based User-to-Email and Email-to-User lookup
 * 
 * Add it to the plugins list in config/main.inc.php and set
 * path to a virtuser table file to resolve user names and e-mail
 * addresses
 * $rcmail_config['virtuser_file'] = '';
 *
 * @version 1.0
 * @author Aleksander Machniak
 */
class virtuser_file extends rcube_plugin
{
    private $file;
    private $app;

    function init()
    {
	$this->app = rcmail::get_instance();
	$this->file = $this->app->config->get('virtuser_file');

	if ($this->file) {
	    $this->add_hook('user2email', array($this, 'user2email'));
	    $this->add_hook('email2user', array($this, 'email2user'));
	}
    }

    /**
     * User > Email
     */
    function user2email($p)
    {
        $r = $this->findinvirtual('/\s' . preg_quote($p['user'], '/') . '\s*$/');
	$result = array();

	for ($i=0; $i<count($r); $i++)
	{
	    $arr = preg_split('/\s+/', $r[$i]);

	    if (count($arr) > 0 && strpos($arr[0], '@'))
	    {
		$result[] = trim(str_replace('\\@', '@', $arr[0]));

		if ($p['first']) {
		    $p['email'] = $result[0];
		    break;
		}
	    }
	}

	$p['email'] = empty($result) ? NULL : $result;

	return $p;
    }

    /**
     * Email > User
     */
    function email2user($p)
    {
	$r = $this->findinvirtual('/^' . preg_quote($p['email'], '/') . '\s/');

	for ($i=0; $i<count($r); $i++)
        {
	    $arr = preg_split('/\s+/', trim($r[$i]));
	    
	    if (count($arr) > 0) {
		$p['user'] = trim($arr[count($arr)-1]);
		break;
	    }
	}

	return $p;
    }

    /**
     * Find matches of the given pattern in virtuser file
     *
     * @param string Regular expression to search for
     * @return array Matching entries
     */
    private function findinvirtual($pattern)
    {
	$result = array();
	$virtual = null;
	
	if ($this->file)
	    $virtual = file($virtuser_file);
	
	if (empty($virtual))
	    return $result;
	
	// check each line for matches
	foreach ($virtual as $line)
	{
	    $line = trim($line);
	    if (empty($line) || $line[0]=='#')
	        continue;
	
	    if (preg_match($pattern, $line))
	        $result[] = $line;
	}
	
	return $result;
    }

}