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path: root/mod/invite.php
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<?php

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

function invite_post(&$a) {

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

	check_form_security_token_redirectOnErr('/', 'send_invite');

	$max_invites = intval(get_config('system','max_invites'));
	if(! $max_invites)
		$max_invites = 50;

	$current_invites = intval(get_pconfig(local_channel(),'system','sent_invites'));
	if($current_invites > $max_invites) {
		notice( t('Total invitation limit exceeded.') . 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_channel(),'system','invites_remaining');
		if((! $x) && (! is_site_admin()))
			return;
	}

	foreach($recips as $recip) {

		$recip = trim($recip);
		if(! $recip)
			continue;

		if(! valid_email($recip)) {
			notice(  sprintf( t('%s : Not a valid email address.'), $recip) . EOL);
			continue;
		}

		else
			$nmessage = $message;

		$account = $a->get_account();


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

		if($res) {
			$total ++;
			$current_invites ++;
			set_pconfig(local_channel(),'system','sent_invites',$current_invites);
			if($current_invites > $max_invites) {
				notice( t('Invitation limit exceeded. Please contact your site administrator.') . EOL);
				return;
			}
		}
		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_channel()) {
		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_channel(),'system','invites_remaining');
		if((! $x) && (! is_site_admin())) {
			notice( t('You have no more invitations available') . EOL);
			return '';
		}
	}

		if($invonly && ($x || is_site_admin())) {
			$invite_code = autoname(8) . rand(1000,9999);
			$nmessage = str_replace('$invite_code',$invite_code,$message);

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

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

	$ob = $a->get_observer();
	if(! $ob)
		return $o;

	$channel = $a->get_channel();

	$o = replace_macros($tpl, array(
		'$form_security_token' => get_form_security_token("send_invite"),
		'$invite' => t('Send invitations'),
		'$addr_text' => t('Enter email addresses, one per line:'),
		'$msg_text' => t('Your message:'),
		'$default_message' => t('Please join my community on $Projectname.') . "\r\n" . "\r\n"
			. $linktxt
			. (($invonly) ? "\r\n" . "\r\n" . t('You will need to supply this invitation code:') . " " . $invite_code . "\r\n" . "\r\n" : '')
			. t('1. Register at any $Projectname location (they are all inter-connected)')
			. "\r\n" . "\r\n" . z_root() . '/register'
			. "\r\n" . "\r\n" . t('2. Enter my $Projectname network address into the site searchbar.')
			. "\r\n" . "\r\n" . $ob['xchan_addr'] . ' (' . t('or visit') . " " . z_root() . '/channel/' . $channel['channel_address'] . ')'
			. "\r\n" . "\r\n"
			. t('3. Click [Connect]')
			. "\r\n" . "\r\n"  ,
		'$submit' => t('Submit')
	));

	return $o;
}