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<?php

/**
 * module: invite.php
 *
 * send email invitations to join social network
 *
 */

function invite_post(&$a) {

	if(! local_user()) {
		notice( t('Permission denied.') . EOL);
		return;
	}


	$recips  = ((x($_POST,'recipients')) ? explode("\n",$_POST['recipients']) : array());
	$message = ((x($_POST,'message'))    ? notags(trim($_POST['message']))    : '');

	$total = 0;

	if(get_config('system','invitation_only')) {
		$invonly = true;
		$x = get_pconfig(local_user(),'system','invites_remaining');
		if((! $x) && (! is_site_admin()))
			return;
	}

	foreach($recips as $recip) {

		$recip = trim($recip);

		if(! valid_email($recip)) {
			notice(  sprintf( t('%s : Not a valid email address.'), $recip) . EOL);
			continue;
		}
		
		if($invonly && ($x || is_site_admin())) {
			$code = autoname(8) . srand(1000,9999);
			$nmessage = str_replace('$invite_code',$code,$message);

			$r = q("INSERT INTO `register` (`hash`,`created`) VALUES ('%s', '%s') ",
				dbesc($code),
				dbesc(datetime_convert())
			);

			if(! is_site_admin()) {
				$x --;
				if($x >= 0)
					set_pconfig(local_user(),'system','invites_remaining',$x);
				else
					return;
			}
		}
		else
			$nmessage = $message;

		$res = mail($recip, sprintf( t('Please join us on Friendica'), $a->config['sitename']), 
			$nmessage, 
			"From: " . $a->user['email'] . "\n"
			. 'Content-type: text/plain; charset=UTF-8' . "\n"
			. 'Content-transfer-encoding: 8bit' );

		if($res) {
			$total ++;
		}
		else {
			notice( sprintf( t('%s : Message delivery failed.'), $recip) . EOL);
		}

	}
	notice( sprintf( tt("%d message sent.", "%d messages sent.", $total) , $total) . EOL);
	return;
}


function invite_content(&$a) {

	if(! local_user()) {
		notice( t('Permission denied.') . EOL);
		return;
	}

	$tpl = get_markup_template('invite.tpl');
	$invonly = false;

	if(get_config('system','invitation_only')) {
		$invonly = true;
		$x = get_pconfig(local_user(),'system','invites_remaining');
		if((! $x) && (! is_site_admin())) {
			notice( t('You have no more invitations available') . EOL);
			return '';
		}
	}			

	$dirloc = get_config('system','directory_submit_url');
	if(strlen($dirloc)) {
		if($a->config['system']['register_policy'] == REGISTER_CLOSED)
			$linktxt = sprintf( t('Visit %s for a list of public sites that you can join. Friendica members on other sites can all connect with each other, as well as with members of many other social networks.'), dirname($dirloc) . '/siteinfo');
		elseif($a->config['system']['register_policy'] != REGISTER_CLOSED)
			$linktxt = sprintf( t('To accept this invitation, please visit and register at %s or any other public Friendica website.'), $a->get_baseurl())
			. "\r\n" . "\r\n" . sprintf( t('Friendica sites all inter-connect to create a huge privacy-enhanced social web that is owned and controlled by its members. They can also connect with many traditional social networks. See %s for a list of alternate Friendica sites you can join.'),dirname($dirloc) . '/siteinfo');
	}
	else {
		$o = t('Our apologies. This system is not currently configured to connect with other public sites or invite members.');
		return $o;
	}

	$o = replace_macros($tpl, array(
		'$invite' => t('Send invitations'),
		'$addr_text' => t('Enter email addresses, one per line:'),
		'$msg_text' => t('Your message:'),
		'$default_message' => t('You are cordially invited to join me and other close friends on Friendica - and help us to create a better social web.') . "\r\n" . "\r\n"
			. $linktxt
			. "\r\n" . "\r\n" . (($invonly) ? t('You will need to supply this invitation code: $invite_code') . "\r\n" . "\r\n" : '') .t('Once you have registered, please connect with me via my profile page at:') 
			. "\r\n" . "\r\n" . $a->get_baseurl() . '/channel/' . $a->user['nickname']
			. "\r\n" . "\r\n" . t('For more information about the Friendica project and why we feel it is important, please visit http://friendica.com') . "\r\n" . "\r\n"  ,
		'$submit' => t('Submit')
	));

	return $o;
}