# aliases-lib.pl
# Alias file functions

# aliases_file(&config)
# Returns the alias filenames
sub aliases_file
{
if ($config{'alias_file'}) { return [ $config{'alias_file'} ]; }
else {
	local(@afiles, $o);
	foreach $o (&find_type("O", $_[0])) {
		if ($o->{'value'} =~ /^\s*AliasFile=(.*)$/) {
			push(@afiles, split(/,/, $1));
			}
		}
	map { s/dbm:// } @afiles;
	return \@afiles;
	}
}

# list_aliases(files)
# Returns an array of data structures, each containing information about
# one sendmail alias
sub list_aliases
{
local $jfiles = join(",", @{$_[0]});
local $c = $list_aliases_cache{$jfiles};
if (!defined($c)) {
	$c = $list_aliases_cache{$jfiles} = [ ];
	local $file;
	local @skip = split(/\s+/, $config{'alias_skip'});
	foreach $file (@{$_[0]}) {
		local $lalias;
		local $lnum = 0;
		open(AFILE, $file);
		while(<AFILE>) {
			s/\r|\n//g;	# remove newlines
			if (/^(#*)\s*([^:$ \t]+)\s*:\s*(.*)$/) {
				local(%alias, @values, $v);
				$alias{'eline'} = $alias{'line'} = $lnum;
				$alias{'file'} = $file;
				$alias{'enabled'} = $1 ? 0 : 1;
				$alias{'name'} = $2;
				$v = $alias{'value'} = $3;
				while($v =~ /^\s*,?\s*()"([^"]+)"(.*)$/ ||
				      $v =~ /^\s*,?\s*(\|)"([^"]+)"(.*)$/ ||
				      $v =~ /^\s*,?\s*()([^,\s]+)(.*)$/) {
					push(@values, $1.$2); $v = $3;
					}
				$alias{'values'} = \@values;
				$alias{'num'} = scalar(@$c);
				if (&indexof($alias{'name'}, @skip) < 0) {
					push(@$c, \%alias);
					$lalias = \%alias;
					}
				}
			elsif (/^(#*)\s+(\S.*)$/ && $lalias &&
			       ($1 && !$lalias->{'enabled'} ||
				!$1 && $lalias->{'enabled'})) {
				# continuation of last alias
				$lalias->{'eline'} = $lnum;
				local $v = $2;
				$lalias->{'value'} .= $v;
				while($v =~ /^\s*,?\s*()"([^"]+)"(.*)$/ ||
				      $v =~ /^\s*,?\s*(\|)"([^"]+)"(.*)$/ ||
				      $v =~ /^\s*,?\s*()([^,\s]+)(.*)$/) {
					push(@{$lalias->{'values'}}, $1.$2); $v = $3;
					}
				}
			else { $lalias = undef; }
			$lnum++;
			}
		close(AFILE);
		}
	}
return @$c;
}

# alias_form([alias])
# Display a form for editing or creating an alias. Each alias can map to
# 1 or more programs, files, lists or users
sub alias_form
{
local($a, @values, $v, $type, $val, @typenames);
$a = $_[0];
if ($a) { @values = @{$a->{'values'}}; }
@typenames = map { $text{"aform_type$_"} } (0 .. 6);
$typenames[0] = "&lt;$typenames[0]&gt;";

print "<form method=post action=save_alias.cgi>\n";
if ($a) { print "<input type=hidden name=num value=$a->{'num'}>\n"; }
else { print "<input type=hidden name=new value=1>\n"; }
print "<table border>\n";
print "<tr $tb> <td><b>",$a ? $text{'aform_edit'}
			    : $text{'aform_create'},"</b></td> </tr>\n";
print "<tr $cb> <td><table>\n";
print "<tr> <td>",&hlink("<b>$text{'aform_name'}</b>","alias_name"),"</td>\n";
printf "<td><input name=name size=20 value=\"%s\"></td> </tr>\n",
	$a ? $a->{'name'} : "";
print "<tr> <td>",&hlink("<b>$text{'aform_enabled'}</b>",
			 "alias_enabled"),"</td>\n";
printf "<td><input type=radio name=enabled value=1 %s> $text{'yes'}\n",
	!$a || $a->{'enabled'} ? "checked" : "";
printf "<input type=radio name=enabled value=0 %s> $text{'no'}</td> </tr>\n",
	!$a || $a->{'enabled'} ? "" : "checked";
for($i=0; $i<=@values; $i++) {
	($type, $val) = $values[$i] ? &alias_type($values[$i]) : (0, "");
	print "<tr> <td valign=top>",
	      &hlink("<b>$text{'aform_val'}</b>","alias_to"),"</td>\n";
	print "<td><select name=type_$i>\n";
	for($j=0; $j<@typenames; $j++) {
		if (!$j || $access{"aedit_$j"}) {
			printf "<option value=$j %s>$typenames[$j]\n",
				$type == $j ? "selected" : "";
			}
		}
	print "</select>\n";
	print "<input name=val_$i size=30 value=\"$val\">\n";
	if ($type == 2 && $a) {
		print "<a href='edit_afile.cgi?file=$val&num=$a->{'num'}'>",
		      "$text{'aform_afile'}</a>\n";
		}
	elsif ($type == 5 && $a) {
		print "<a href='edit_rfile.cgi?file=$val&num=$a->{'num'}'>",
		      "$text{'aform_afile'}</a>\n";
		}
	elsif ($type == 6 && $a) {
		print "<a href='edit_ffile.cgi?file=$val&num=$a->{'num'}'>",
		      "$text{'aform_afile'}</a>\n";
		}
	print "</td> </tr>\n";
	}
print "<tr> <td colspan=2 align=right>\n";
if ($a) {
	print "<input type=submit value=$text{'save'}>\n";
	print "<input type=submit name=delete value=$text{'delete'}>\n";
	}
else { print "<input type=submit value=$text{'create'}>\n"; }
print "</td> </tr>\n";
print "</table></td></tr></table></form>\n";
}

# create_alias(&details, files, [norebuild])
# Create a new alias
sub create_alias
{
&list_aliases($_[1]);	# force cache init
local(%aliases);
local $lref = &read_file_lines($_[1]->[0]);
local $str = ($_[0]->{'enabled'} ? "" : "# ") . $_[0]->{'name'} . ": " .
	     join(',', map { /\s/ ? "\"$_\"" : $_ } @{$_[0]->{'values'}});
push(@$lref, $str);
&flush_file_lines();
&system_logged("newaliases >/dev/null 2>&1") if (!$_[2]);

$_[0]->{'file'} = $_[1]->[0];
$_[0]->{'line'} = @$lref-1;
$_[0]->{'eline'} = @$lref-1;
$_[0]->{'num'} = scalar(@list_aliases_cache);
push(@list_aliases_cache, $_[0]);
}

# delete_alias(&details, [norebuild])
sub delete_alias
{
local $lref = &read_file_lines($_[0]->{'file'});
local $len = $_[0]->{'eline'} - $_[0]->{'line'} + 1;
splice(@$lref, $_[0]->{'line'}, $len);
&flush_file_lines();
&system_logged("newaliases >/dev/null 2>&1") if (!$_[1]);

local $idx = &indexof($_[0], @list_aliases_cache);
splice(@list_aliases_cache, $idx, 1) if ($idx != -1);
&renumber_list(\@list_aliases_cache, $_[0], -1);
}

# modify_alias(&old, &details, [norebuild])
# Update some existing alias
sub modify_alias
{
local $str = ($_[1]->{'enabled'} ? "" : "# ") . $_[1]->{'name'} . ": " .
	     join(',', map { /\s/ ? "\"$_\"" : $_ } @{$_[1]->{'values'}});
local $lref = &read_file_lines($_[0]->{'file'});
local $len = $_[0]->{'eline'} - $_[0]->{'line'} + 1;
splice(@$lref, $_[0]->{'line'}, $len, $str);
&flush_file_lines();
&system_logged("newaliases >/dev/null 2>&1") if (!$_[2]);

local $idx = &indexof($_[0], @list_aliases_cache);
$_[1]->{'file'} = $_[0]->{'file'};
$_[1]->{'line'} = $_[1]->{'eline'} = $_[0]->{'line'};
$list_aliases_cache[$idx] = $_[1] if ($idx != -1);
&renumber_list(\@list_aliases_cache, $_[0], 1 - $len);
}

# alias_type(string)
# Return the type and destination of some alias string
sub alias_type
{
local @rv;
if ($_[0] =~ /^\|$module_config_directory\/autoreply.pl\s+(\S+)/) {
	@rv = (5, $1);
	}
elsif ($_[0] =~ /^\|$module_config_directory\/filter.pl\s+(\S+)/) {
	@rv = (6, $1);
	}
elsif ($_[0] =~ /^\|(.*)$/) {
	@rv = (4, $1);
	}
elsif ($_[0] =~ /^(\/.*)$/) {
	@rv = (3, $1);
	}
elsif ($_[0] =~ /^:include:(.*)$/) {
	@rv = (2, $1);
	}
else {
	@rv = (1, $_[0]);
	}
return wantarray ? @rv : $rv[0];
}

# lock_alias_files(&files)
sub lock_alias_files
{
foreach $f (@{$_[0]}) {
	&lock_file($f);
	}
}

# unlock_alias_files(&files)
sub unlock_alias_files
{
foreach $f (@{$_[0]}) {
	&unlock_file($f);
	}
}

1;

