sub request_invite
	{
    my $clean_invite = parse_registration_input();
    my $result = 0;
    if ($clean_invite != -1)
        {
		new_invite($clean_invite);	
        request_success();
		}
	}

sub generate_invite
	{
	my $invite_count = count_active_user_invites($USER->{username});
	my $newhash;

	# don't invite your whole social network
	if ($invite_count >= 5) 
		{ return -1 unless ($USER->{ulevel} == 3); }

	for (my $i = 0; $i < 3; $i++)
		{
		$newhash = make_new_hash($USER->{username} . time);
		my $invite = get_invite_from_hash($hash);
		last unless (invite_is_active($invite));
		}

	my $clean_invite = parse_invite_input($newhash);
	if ($clean_invite != -1)
		{ $result = new_invite($clean_invite); }
	$result ? return $newhash : return -1;
	}

sub validate_invite
	{
	my ($hash) = @_;
	my $invite = get_invite_from_hash($hash);

	unless (invite_is_active($invite))
		{ error("Bad invite key!"); }

	my $clean_register = parse_registration_input();
	if ($clean_register != -1)
		{
		my $uid = new_user($clean_register);
		set_invite_state($invite, $BUCKY_INVITE_REDEEMED);
		set_invite_username($invite, $clean_register->{username});
		# auto-op on keywords
		add_mailbox("$clean_register->{username}.inbox",  $clean_register->{username}, 0);
		add_mailbox("$clean_register->{username}.outbox", $clean_register->{username}, 0);
		add_mailbox("$clean_register->{username}.drafts", $clean_register->{username}, 1);
		send_welcome_message($uid);
		send_invite_receipt($invite->{attest}, $clean_register, $invite);
		send_invite_receipt($BUCKY_ADMINISTRATOR, $clean_register, $invite);
		validate_success();
		}
	}

sub validate_approve
	{
	my ($invite) = @_;
	my $o =
		{
		username => $invite->{username},
		password => $invite->{password},
		realname => $invite->{realname},
		email => $invite->{email},
		grass => $invite->{grass}
		};
	my $uid = new_user($o);
	$result = set_invite_state($invite, $BUCKY_INVITE_APPROVED);
	# auto-op on keywords
	add_mailbox("$o->{username}.inbox",  $o->{username}, 0);
	add_mailbox("$o->{username}.outbox", $o->{username}, 0);
	add_mailbox("$o->{username}.drafts", $o->{username}, 1);
	send_welcome_message($uid);
	return 1;
	}

sub send_invite_receipt
	{
	my ($recipient, $newuser, $invite) = @_;
	my $mbox = ($recipient eq $BUCKY_ADMINISTRATOR) ? "$recipient.system" : "$recipient.inbox";
	$transcript =
		qq(<b>$newuser->{username}</b> has created an account via invite.\n\n) .
		qq(<b>real name:</b> $newuser->{realname}\n\n) .
		qq(<b>email:</b> $newuser->{email}\n\n) .
		qq(<b>invited by:</b> $invite->{attest}\n\n);
	new_message($mbox,
		{
		sender => "system",
		recipient => $recipient,
		unread => 1,
		subject => "New user $newuser->{username} via invite",
		body => $transcript
		} );
	}

#############################

sub validate_success
	{
	header("account created!");
    print qq(<hr noshade color="$BUCKY_COLOR_HR" style="padding: 0px; margin: 2px;"><br><br><br><center><div class=message>);
	print "Your $BUCKY_NAME account has created!<p>";
	print "Please <b>log in</b> for the first time.\n";
    print qq(<hr noshade color="$BUCKY_COLOR_HR">\n\n);
	login_form();
    print qq(</div></center>\n\n);
	footer();
	}

sub request_success
	{
	header("account requested!");
    print qq(<hr noshade color="$BUCKY_COLOR_HR">\n\n);
	print "Your request for a $BUCKY_NAME account has been submitted and will be acted upon shortly.<p>";
	print qq(<big><a href="/">back to $BUCKY_NAME</a></big>);
	footer();
	}

#############################

sub registration_form
	{
	my ($invite) = @_;
	my $invited = defined($invite) && $invite != -1;

	if ($invited)
		{ header("create an account"); }
	else
		{ header("request an account"); }

	print <<adduserform;
<hr noshade color="$BUCKY_COLOR_HR" style="padding: 0px; margin: 2px;"><br>
<table width=100%><tr><td align="center">
<img src="/bucky/newme.jpg" style="border: 2px solid #000; margin-bottom: 3px;"><br><!-- <small>~ OUR FOUNDER ~</small> -->
<small><span style="color: #dfd6cd;">may i note here . . . that i test this with firefox</span><br></small>
<table><tr><td class="message" nowrap style="width: 300px;">
<b>welcome to $BUCKY_NAME!</b>
<hr noshade color="$BUCKY_COLOR_HR">
<div align="right" nowrap style="width: 250px;">

<form action="$BUCKY/invite" method="post">
adduserform

    print qq(<input type="hidden" name="debug" value="1">\n) if ($DEBUG);

	if ($invited)
		{
		print qq(<input type="hidden" name="c" value="validate">\n);
    	print qq(<input type="hidden" name="hash" value="$invite->{hash}">\n);
		}
	else
		{
		print qq(<input type="hidden" name="c" value="request">\n);
		}

    print <<adduserfoot;
username <small>(lowercase)</small>: <input type="text" name="username" value="" size=10 maxlength=9><br>
password: <input type="password" name="pw1" value="" size=13 maxlength=20><br>
again! <input type="password" name="pw2" value="" size=13 maxlength=20><br>
real name: <input type="text" name="realname" value="" size=20><br>
email address: <input type="text" name="email" value="" size=20><br>
</div>
adduserfoot

    print <<snark;
please say hello:<br>
<textarea name="grass" rows="5" style="width: 86%; padding: 0px 1px 1px 1px; font-family: trebuchet ms, sans serif; font-size: 11px;"></textarea>
snark

    print <<addusereof;
<div align="center">
<p>

<input type="submit" value="SUBMIT" class="clicky">

</form>
</div>
</td></tr></table>
</td></tr></table>
addusereof

	footer();
	}

#############################

sub parse_invite_input
	{
	my ($newhash) = @_;
	my $safe = 1;

	my $clean =
		{
		state	 => $BUCKY_INVITE_ACTIVE,
		hash	 => $newhash,
		attest	 => $USER->{username},
		keywords => scrub($input->{keyword})
		};

	if ($safe)
		{ return $clean; }
	else
		{ return -1; }
	}

sub parse_registration_input
	{
	my @error;
	my $clean;

	if ($input->{username} =~ /(root|system|bucky|$BUCKY_SHORT_NAME)/)
		{ push @error, "Illegal username"; }
	if ($input->{username} =~ /\s/)
		{ push @error, "Username cannot contain spaces"; }
	if ($input->{pw1} ne $input->{pw2})
		{ push @error, "Passwords don't match"; }
	if (get_user($input->{username}) != -1)
		{ push @error, "User already exists"; }

	$clean =
		{
		state	 => $BUCKY_INVITE_REQUEST,
		username => lc(scrub($input->{username})),
		password => crypt($input->{pw1}, lc(scrub($input->{username}))),
		realname => scrub($input->{realname}),
		email	 => scrub($input->{email}),
		grass	 => scrub($input->{grass})
		};

	if (@error)
		{
		registration_form_error(@error);
		return -1;
		}
	else
		{
		return $clean;
		}
	}

sub registration_form_error
	{
	my (@error) = @_;
	header("registration form error");
	print "Sorry, there was an error in your registration:<p>";
	print "<ul>\n";
	foreach my $e (@error)
		{
		print "<li> $e\n";
		}
	print "</ul>\n";
	print qq(Please <a href="javascript:history.go(-1)">go back and fix it</a> . . .<p>);
	footer();
	exit(1);
	}

#############################

sub invite_result_box
	{
	my ($command, $hash, $result) = @_;
	print qq(<div class="message">);
	if ($command eq "new")
		{
		if ($result)
			{
			print qq(<b>invite created!</b><p>);
			print qq(give the url to your friend!);
			}
		else
			{
			print qq(you were <b>unable</b> to make a new invite!<p>);
			print qq(maybe you have been inviting too many people?!);
			}
		}
	else
		{
		print qq(<b>$command</b> );
		print $result ? "succeeded!" : "failed!";
		}
	print qq(</div>\n);
	}

sub invite_create_box
	{
	print qq(<div class="message">);
	print qq(<b>invite</b> whomever..\n<hr noshade color="$BUCKY_COLOR_HR">\n);
  print qq(only invite goodfellows,<br>my fellow ).$BUCKY_DUDER_NOUN.qq(s.<p>);
	print qq(<form action="$BUCKY/invite" method="post">\n);
    print qq(<input type="hidden" name="debug" value="1">\n) if ($DEBUG);
	print qq(<input type="hidden" name="c" value="new">\n);
	# keyword_pulldown();
	print qq(<input type="submit" value="G E N E R A T E" class="clicky">\n);
	print qq(</form>);
	print qq(</div>\n);
	}

#############################

sub display_personal_invites
	{
	my $user_invites = get_invites_by_user($USER->{username});
	return if ($user_invites == -1);
	print "<big><b>Your invites:</b></big><p>";
	display_invites_table($user_invites);
	}

sub display_approve_list
	{
	my $invites = get_active_invites();
	print "<big><b>Active invites and requests:</b></big><p>";
	display_invites_table($invites);
	}

{
my %invites_seen;
sub display_invites_table
	{
	my ($invites) = @_;
	my $r = 0;
	print qq(<table border=0 cellpadding=0 cellspacing=0 class="main" width=600>\n);

	foreach my $i (sort { $b->{id} <=> $a->{id} } @$invites)
		{
		next if (exists($invites_seen{$i->{id}})); # minimize redundancy in admin list
		$invites_seen{$i->{id}} = 1;
		display_single_invite($i, $r);
		$r = $r ? 0 : 1;
		}

	print qq(</table>);
	}
}

sub display_single_invite
	{
	my ($i, $r) = @_;

	print qq(<tr class="row$r">);

	print qq(<td align=center style="border-right: 1px dashed #bbb; width: 80px;">);
	print qq(<b>) if ($i->{state} == 2);
	print $BUCKY_INVITE_STATES[$i->{state}];
	print qq(</b>) if ($i->{state} == 2);
	print qq(</td>);

	if ($i->{hash})
		{ display_invite_row($i); }
	else
		{ display_approve_row($i); }
	print qq(</tr>\n);
	}

sub display_invite_row
	{
	my ($i) = @_;

	if ($i->{state} > 0)
		{
		print qq(<td>);
		print qq(<table cellpadding=0 cellspacing=0 border=0 width=100%);

		print qq(<tr>);
		print qq(<td align=center colspan=4>);
		print qq(<a href="$BUCKY/invite?i=$i->{hash}">http://$BUCKY_HOST$BUCKY/invite/$i->{hash}</a>);
		print qq(</td>);
		print qq(</tr>);

		print qq(<tr>);
		print qq(<td align=center>);
		print qq(<small>invited by ).profile_link($i->{attest}).qq(</small>);
		print qq(</td>);
		print qq(<td align=right>);
		print qq(<small>expires in</small>);
		print qq(</td>);
		print qq(<td align=left>);
		print get_age($i->{expired});
		print qq(</td>);
		print qq(<td align=right>);
		print invite_snuff_link("renew", $i->{id}) . qq( &middot; );
		print invite_snuff_link("cancel", $i->{id});
		print qq(</td>);
		print qq(</tr>);

		print qq(</table>);
		print qq(</td>);
		}
	elsif ($i->{state} == $BUCKY_INVITE_REDEEMED)
		{
		print qq(<td>);
		print qq(<table cellpadding=0 cellspacing=0 border=0 width=100%);
		print qq(<tr>);
		print qq(<td align=center width=50%>);
		print qq(<small>invited by ).profile_link($i->{attest}).qq(</small>);
		print qq(</td>);
		print qq(<td align=center width=50%>);
		print qq(new user: );
		print profile_link($i->{username});
		print qq(</td>);
		print qq(</tr>);
		print qq(</table>);
		print qq(</td>);
		}
	else
		{
		print qq(<td>&nbsp;</td>);
		}
	}

#		username => lc(scrub($input->{username})),
#		realname => scrub($input->{realname}),
#		email	 => scrub($input->{email}),
#		grass	 => scrub($input->{grass})

sub display_approve_row
	{
	my ($i) = @_;
	print qq(<td>);
	print qq(<table cellpadding=0 cellspacing=0 border=0 width=100%);

	print qq(<tr><td align=right width=100><b>username:&nbsp;</b></td><td align=left colspan=2>$i->{username}</td></tr>);
	print qq(<tr><td align=right width=100><b>realname:&nbsp;</b></td><td align=left colspan=2>$i->{realname}</td></tr>);
	print qq(<tr><td align=right width=100><b>email:&nbsp;</b></td><td align=left colspan=2>$i->{email}</td></tr>);

	print qq(<tr>);
	print qq(<td>&nbsp;</td>);
	print qq(<td align=left colspan=2>$i->{grass}</td>);
	print qq(</tr>);

	if ($i->{state} > 0)
		{
		print qq(<tr>);
		print qq(<td align=right>);
		print qq(<small>expires in</small>);
		print qq(</td>);
		print qq(<td align=left>);
		print get_age($i->{expired});
		print qq(</td>);

		print qq(<td align=right>);
		print invite_snuff_link("approve", $i->{id}) . qq( &middot; );
		print invite_snuff_link("reject", $i->{id});
		print qq(</td>);
		print qq(</tr>);
		}

	print qq(</table>);
	print qq(</td>);
	}

sub invite_snuff_link
	{
	my ($c, $id) = @_;
	return qq(<a href="$BUCKY/invite?c=$c&id=$id">$c</a>);
	}

#############################

sub make_new_hash
	{
	my ($string) = @_;
	$string = length($string) ? $string : time;
	$hex = md5_hex ($string);
	return substr $hex, 0, 16;	# these will TOTALLY never collide
	}

sub invite_is_active
    {
    my ($invite) = @_;
    return 0 if ($invite == -1);
    return 0 if ($invite->{state} < 1);
	#if ($invite->{expired} < time)
	#	{
	#	set_invite_state($invite, $BUCKY_INVITE_EXPIRED);
	#	return 0;
	#	}
    return 1;
    }

1;