# filemin-lib.pl

BEGIN { push(@INC, ".."); };
use WebminCore;
&init_config();

use lib './lib';
use POSIX;
use Encode qw(decode encode);
use File::Basename;
eval "use File::MimeInfo";


sub get_acls_status {
  return has_command('getfacl');
}

sub get_list_acls_command {
  return has_command('getfacl') . " -p ";
}

sub get_attr_status {
  return has_command('lsattr');
}

sub get_attr_command {
  return 'lsattr -d ';
}

sub get_selinux_status {
  return is_selinux_enabled();
}

sub get_selinux_command_type {
  my $out = backquote_command("ls --help 2>&1 </dev/null");
  return $out =~ /--scontext/ ? 1 : 0;
}

sub get_selinux_command {
  return get_selinux_command_type() ? 'ls -d --scontext ' : 'ls -dmZ ';
}

sub get_paths {
    %access = &get_module_acl();

    # Switch to the correct user
    if (&get_product_name() eq 'usermin') {
        # In Usermin, the module only ever runs as the connected user
        &switch_to_remote_user();
        &create_user_config_dirs();
    }
    elsif ($access{'work_as_root'}) {
        # Root user, so no switching
        @remote_user_info = getpwnam('root');
    }
    elsif ($access{'work_as_user'}) {
        # A specific user
        @remote_user_info = getpwnam($access{'work_as_user'});
        @remote_user_info ||
            &error("Unix user $access{'work_as_user'} does not exist!");
        &switch_to_unix_user(\@remote_user_info);
    }
    else {
        # Run as the Webmin user we are connected as
        &switch_to_remote_user();
    }

    # Get and check allowed paths
    @allowed_paths = split(/\s+/, $access{'allowed_paths'});
    if (&get_product_name() eq 'usermin') {
        # Add paths from Usermin config
        push(@allowed_paths, split(/\t+/, $config{'allowed_paths'}));
    }
    if ($remote_user_info[0] eq 'root' && @allowed_paths == 1 &&
        ($allowed_paths[0] eq '$HOME' || $allowed_paths[0] eq '$ROOT')) {
	# If the user is running as root and the only allowed path is $HOME
	# or $ROOT, assume that all files are allowed
        $base = "/";
        @allowed_paths = ( $base );
    } else {
	# Resolve actual allowed paths
        @allowed_paths = map { $_ eq '$HOME' ? @remote_user_info[7] :
			       $_ eq '$ROOT' ? '/' : $_ } @allowed_paths;
        @allowed_paths = map { s/\$USER/$remote_user/g; $_ } @allowed_paths;
        @allowed_paths = &unique(@allowed_paths);
	@allowed_paths = map { my $p = $_; $p =~ s/\/\.\//\//; $p }
			     @allowed_paths;
        if (scalar(@allowed_paths) == 1) {
            $base = $allowed_paths[0];
        } else {
            $base = '/';
        }
    }
    @allowed_paths = map { &simplify_path($_) } &unique(@allowed_paths);
    if ($in{'path'} =~ /^%2F/) {
        $path = un_urlize($in{'path'}, 1) || '';
    } else {
        $path = $in{'path'} || '';
    }
    $quote_escaped_path = quote_escape($path);
    $urlized_path = urlize($path);
    
    $cwd = &simplify_path($base.$path);

    # Work out max upload size
    if (&get_product_name() eq 'usermin') {
	$upload_max = $config{'max'};
    } else {
	$upload_max = $access{'max'};
    }

    # Check that current directory is one of those that is allowed
    my $error = 1;
    for $allowed_path (@allowed_paths) {
        if (&is_under_directory($allowed_path, $cwd) ||
            $allowed_path =~ /^\Q$cwd\E/) {
            $error = 0;
        }
    }
    if ($error) {
        &error(&text('notallowed', '`' . &html_escape($cwd) . '`',
                                   '`' . &html_escape(join(" , ", @allowed_paths)) . '`.'));
    }

    if (index($cwd, $base) == -1)
    {
        $cwd = $base;
    }

    # Initiate per user config
    $confdir = "$remote_user_info[7]/.filemin";
    if(!-e $confdir) {
        mkdir $confdir or &error("$text{'error_creating_conf'}: $!");
    }
    if(!-e "$confdir/.config") {
        &read_file_cached("$module_root_directory/defaultuconf", \%userconfig);
    } else {
        &read_file_cached("$confdir/.config", \%userconfig);
    }
    &load_module_preferences(&get_module_name(), \%userconfig);
}

sub print_template {
    $template_name = @_[0];
    if (open(my $fh, '<:encoding(UTF-8)', $template_name)) {
      while (my $row = <$fh>) {
        print (eval "qq($row)");
      }
    } else {
      print "$text{'error_load_template'} '$template_name' $!";
    }
}

sub print_errors {
    my @errors = @_;
    &ui_print_header(undef, $module_info{'name'}, "");
    print $text{'errors_occured'};
    print "<ul>";
    foreach $error(@errors) {
        print("<li>$error</li>");
    }
    print "<ul>";
    &ui_print_footer("index.cgi?path=".&urlize($path), $text{'previous_page'});
}

sub print_interface {
    # Some vars for "upload" functionality
    local $upid = time().$$;
    $bookmarks = get_bookmarks();
    @allowed_for_edit = split(/\s+/, $access{'allowed_for_edit'});
    %allowed_for_edit = map { $_ => 1} @allowed_for_edit;

    # Set things up according to currently used theme
    if ($current_theme eq 'authentic-theme' or $current_theme eq 'bootstrap') {

        # Interface for Bootstrap 3 powered themes
        # Set icons variables
        $edit_icon = "<i class='fa fa-edit' alt='$text{'edit'}'></i>";
        $rename_icon = "<i class='fa fa-font' title='$text{'rename'}'></i>";
        $extract_icon = "<i class='fa fa-external-link' alt='$text{'extract_archive'}'></i>";
        $goto_icon = "<i class='fa fa-arrow-right' alt='$text{'goto_folder'}'></i>";

        # Add static files
        print "<link rel=\"stylesheet\" type=\"text/css\" href=\"unauthenticated/css/style.css\" />";
        print "<script type=\"text/javascript\" src=\"unauthenticated/js/main.js\"></script>";
        print "<script type=\"text/javascript\" src=\"unauthenticated/js/chmod-calculator.js\"></script>";
        print "<script type=\"text/javascript\" src=\"unauthenticated/js/bootstrap-hover-dropdown.min.js\"></script>";

        # Set "root" icon
        if($base eq '/') {
            $root_icon = "<i class='fa fa-hdd-o'></i>";
        } else {
            $root_icon = "~";
        }

        # Breadcrumbs
        print "<ol class='breadcrumb pull-left'><li><a href='index.cgi?path='>$root_icon</a></li>";
        my @breadcr = split('/', $path);
        my $cp = '';
        for(my $i = 1; $i <= scalar(@breadcr)-1; $i++) {
            chomp($breadcr[$i]);
            $cp = $cp.'/'.$breadcr[$i];
            print "<li><a href='index.cgi?path=".&urlize($cp)."'>".
                  &html_escape($breadcr[$i])."</a></li>";
        }
        print "</ol>";

        # And toolbar
        if($userconfig{'menu_style'} || $current_theme eq 'authentic-theme') {
            print_template("unauthenticated/templates/menu.html");
        } else {
            print_template("unauthenticated/templates/quicks.html");
        }
        $page = 1;
        $pagelimit = 4294967295; # The number of maximum files in a directory for EXT4. 9000+ is way to little
        print_template("unauthenticated/templates/dialogs.html");
    } else {
        # Interface for legacy themes
        # Set icons variables
        $edit_icon = "<img src='images/icons/quick/edit.png' alt='$text{'edit'}' />";
        $rename_icon = "<img src='images/icons/quick/rename.png' alt='$text{'rename'}' />";
        $extract_icon = "<img src='images/icons/quick/extract.png' alt='$text{'extract_archive'}' />";
        $goto_icon = "<img src='images/icons/quick/go-next.png' alt='$text{'goto_folder'}'";

        # Add static files
        $head = "<link rel=\"stylesheet\" type=\"text/css\" href=\"unauthenticated/css/style.css\" />";
        $head.= "<script type=\"text/javascript\" src=\"unauthenticated/jquery/jquery.min.js\"></script>";
        $head.= "<script type=\"text/javascript\" src=\"unauthenticated/jquery/jquery-ui.min.js\"></script>";
        $head.= "<script type=\"text/javascript\" src=\"unauthenticated/js/legacy.js\"></script>";
        $head.= "<link rel=\"stylesheet\" type=\"text/css\" href=\"unauthenticated/jquery/jquery-ui.min.css\" />";
        $head.= "<script type=\"text/javascript\" src=\"unauthenticated/js/chmod-calculator.js\"></script>";
        $head.= "<link rel=\"stylesheet\" type=\"text/css\" href=\"unauthenticated/dropdown/fg.menu.css\" />";
        $head.= "<script type=\"text/javascript\" src=\"unauthenticated/dropdown/fg.menu.js\"></script>";
        print $head;

        # Set "root" icon
        if($base eq '/') {
            $root_icon = "<img src=\"images/icons/quick/drive-harddisk.png\" class=\"hdd-icon\" />";
        } else {
            $root_icon = "~";
        }
        # Legacy breadcrumbs
        print "<div id='bread' style='float: left; padding-bottom: 2px;'><a href='index.cgi?path='>$root_icon</a> / ";
        my @breadcr = split('/', $path);
        my $cp = '';
        for(my $i = 1; $i <= scalar(@breadcr)-1; $i++) {
            chomp($breadcr[$i]);
            $cp = $cp.'/'.$breadcr[$i];
            print "<a href='index.cgi?path=".&urlize($cp)."'>".
                  &html_escape($breadcr[$i])."</a> / ";
        }
        print "<br />";
        # And pagination
        $page = $in{'page'};
        $pagelimit = $userconfig{'per_page'};
        $pages = ceil((scalar(@list))/$pagelimit);
        if (not defined $page or $page > $pages) { $page = 1; }
        print "Pages: ";
        for(my $i = 1;$i <= $pages;$i++) {
            if($page eq $i) {
                print "<a class='pages active' ".
                      "href='?path=".&urlize($path).
                      "&page=$i".
                      "&query=".&urlize($query).
                      "'>".&html_escape($i)."</a>";
            } else {
                print "<a class='pages' ".
                      "href='?path=".&urlize($path).
                      "&page=$i".
                      "&query=".&urlize($query)."'>".&html_escape($i)."</a>";
            }
        }
        print "</div>";

        # And toolbar
        print_template("unauthenticated/templates/legacy_quicks.html");
        print_template("unauthenticated/templates/legacy_dialogs.html");
    }
    my $info_total;
    my $info_files = scalar @files;
    my $info_folders = scalar @folders;

    if ($info_files eq 1 && $info_folders eq 1) {
        $info_total = 'info_total1'
    } elsif ($info_files ne 1 && $info_folders eq 1) {
        $info_total = 'info_total2'
    } elsif ($info_files eq 1 && $info_folders ne 1) {
        $info_total = 'info_total3'
    } else {
        $info_total = 'info_total4'
    }

    print "<div class='total'>" . &text($info_total, scalar @files, scalar @folders) . "</div>";

    # Render current directory entries
    print &ui_form_start("", "post", undef, "id='list_form'");
    @ui_columns = (
            '<input class="_select-unselect_" type="checkbox" onclick="selectUnselect(this)" />',
            ''
        );
    push @ui_columns, ('<span data-head-name>' . $text{'name'} . '</span>');
    push @ui_columns, ('<span data-head-type>' . $text{'type'} . '</span>') if($userconfig{'columns'} =~ /type/);
    push @ui_columns, ('<span data-head-actions>' . $text{'actions'} . '</span>');
    push @ui_columns, ('<span data-head-size>' . $text{'size'} . '</span>') if($userconfig{'columns'} =~ /size/);
    push @ui_columns, ('<span data-head-owner_user>' . $text{'ownership'} . '</span>') if($userconfig{'columns'} =~ /owner_user/);
    push @ui_columns, ('<span data-head-permissions>' . $text{'permissions'} . '</span>') if($userconfig{'columns'} =~ /permissions/);
    push @ui_columns, ('<span data-head-acls>' . $text{'acls'} . '</span>') if(get_acls_status() && $userconfig{'columns'} =~ /acls/);
    push @ui_columns, ('<span data-head-attributes>' . $text{'attributes'} . '</span>') if(get_attr_status() && $userconfig{'columns'} =~ /attributes/);
    push @ui_columns, ('<span data-head-selinux>' . $text{'selinux'} . '</span>') if(get_selinux_status() && $userconfig{'columns'} =~ /selinux/);
    push @ui_columns, ('<span data-head-last_mod_time>' . $text{'last_mod_time'} . '</span>') if($userconfig{'columns'} =~ /last_mod_time/);

    print &ui_columns_start(\@ui_columns);
    #foreach $link (@list) {
    for(my $count = 1 + $pagelimit*($page-1);$count <= $pagelimit+$pagelimit*($page-1);$count++) {
        if ($count > scalar(@list)) { last; }
        my $class = $count & 1 ? "odd" : "even";
        my $link = $list[$count - 1][0];
        my $acls;
        my $attributes;
        my $selinux;
        $link =~ s/\Q$cwd\E\///;
        $link =~ s/^\///g;
        $vlink = html_escape($link);
        $vlink = quote_escape($vlink);
        my $hlink = html_escape($vlink);
        $vpath = quote_escape($vpath);

        my $type = $list[$count - 1][14];
        $type =~ s/\//\-/g;

        my $img = "images/icons/mime/$type.png";
        unless (-e $img) { $img = "images/icons/mime/unknown.png"; }
        $size = &nice_size($list[$count - 1][8]);
        $user = getpwuid($list[$count - 1][5]) ? getpwuid($list[$count - 1][5]) : $list[$count - 1][5];
        $group = getgrgid($list[$count - 1][6]) ? getgrgid($list[$count - 1][6]) : $list[$count - 1][6];
        $permissions = sprintf("%04o", $list[$count - 1][3] & 07777);

        if(get_selinux_status() && $userconfig{'columns'} =~ /selinux/) {
          $selinux = $list[$count - 1][17];
        }

        if(get_attr_status() && $userconfig{'columns'} =~ /attributes/) {
          $attributes = $list[$count - 1][18];
        }

        if(get_acls_status() && $userconfig{'columns'} =~ /acls/) {
          $acls = $list[$count - 1][19];
        }

        $mod_time = POSIX::strftime('%Y/%m/%d - %T', localtime($list[$count - 1][10]));

        $actions = "<a class='action-link' href='javascript:void(0)' onclick='renameDialog(\"$vlink\")' title='$text{'rename'}' data-container='body'>$rename_icon</a>";

        if ( $list[ $count - 1 ][15] == 1 ) {
            $href = "index.cgi?path=" . &urlize("$path/$link");
        } else {
            $href = "download.cgi?file=".&urlize($link)."&path=".&urlize($path);
            if($0 =~ /search.cgi/) {
                ($fname,$fpath,$fsuffix) = fileparse($list[$count - 1][0]);
                if($base ne '/') {
                    $fpath =~ s/^\Q$base\E//g;
                }
                $actions = "$actions<a class='action-link' ".
                           "href='index.cgi?path=".&urlize($fpath)."' ".
                           "title='$text{'goto_folder'}'>$goto_icon</a>";
            }
            if (
                index($type, "text-") != -1 or
                exists($allowed_for_edit{$type})
            ) {
                $actions = "$actions<a class='action-link' href='edit_file.cgi?file=".&urlize($link)."&path=".&urlize($path)."' title='$text{'edit'}' data-container='body'>$edit_icon</a>";
            }
            if ((index($type, "application-zip") != -1             && has_command('unzip')) ||
              (index($type, "application-x-7z-compressed") != -1 && has_command('7z'))    ||
              ((index($type, "application-x-rar") != -1 || index($type, "application-vnd.rar") != -1) && has_command('unrar')) ||
              (index($type, "application-x-rpm") != -1 && has_command('rpm2cpio') && has_command('cpio')) ||
              (index($type, "application-x-deb") != -1 && has_command('dpkg'))
              ||
              (
                  (index($type, "x-compressed-tar") != -1 ||
                   index($type, "-x-tar") != -1           ||
                   (index($type, "-x-bzip") != -1 && has_command('bzip2')) ||
                   (index($type, "-gzip") != -1   && has_command('gzip'))  ||
                   (index($type, "-x-xz") != -1   && has_command('xz'))
                  ) &&
                  has_command('tar')))
          {
              $actions =
                "$actions <a class='action-link' href='extract.cgi?path=" . &urlize($path) .
                "&file=" . &urlize($link) . "' title='$text{'extract_archive'}' data-container='body'>$extract_icon</a> ";
          }

        }
        @row_data = (
            "<a href='$href'><img src=\"$img\"></a>",
            "<a href=\"$href\" data-filemin-path=\"$href\" data-filemin-link=\"$hlink\">$vlink</a>"
        );
        push @row_data, $type if($userconfig{'columns'} =~ /type/);
        push @row_data, $actions;
        push @row_data, $size if($userconfig{'columns'} =~ /size/);
        push @row_data, $user.':'.$group if($userconfig{'columns'} =~ /owner_user/);
        push @row_data, $permissions if($userconfig{'columns'} =~ /permissions/);
        push @row_data, $acls if(get_acls_status() && $userconfig{'columns'} =~ /acls/);
        push @row_data, $attributes if(get_attr_status() && $userconfig{'columns'} =~ /attributes/);
        push @row_data, $selinux if(get_selinux_status() && $userconfig{'columns'} =~ /selinux/);
        push @row_data, $mod_time if($userconfig{'columns'} =~ /last_mod_time/);

        print &ui_checked_columns_row(\@row_data, "", "name", $vlink);
    }
    print ui_columns_end();
    print &ui_hidden("path", $path),"\n";
    print &ui_form_end();
}

sub get_bookmarks {
    $confdir = "$remote_user_info[7]/.filemin";
    if(!-e "$confdir/.bookmarks") {
        return "<li><a>$text{'no_bookmarks'}</a></li>";
    }
    my $bookmarks = &read_file_lines($confdir.'/.bookmarks', 1);
    $result = '';
    foreach $bookmark(@$bookmarks) {
        $result .=
          "<li><a href='index.cgi?path=" . &urlize($bookmark) . "'>" . &html_escape($bookmark) . "</a></li>";
    }
    return $result;
}

# get_paste_buffer_file()
# Returns the location of the file for temporary copy/paste state
sub get_paste_buffer_file
{
    if (&get_product_name() eq 'usermin') {
        return $user_module_config_directory."/.buffer";
    }
    else {
        my $tmpdir = "$remote_user_info[7]/.filemin";
        &make_dir($tmpdir, 0700) if (!-d $tmpdir);
        return $tmpdir."/.buffer";
    }
}

# check_allowed_path(file)
# Calls error if some path isn't allowed
sub check_allowed_path
{
my ($file) = @_;
$file = &simplify_path($file);
my $error = 1;
foreach my $allowed_path (@allowed_paths) {
	if (&is_under_directory($allowed_path, $file)) {
		$error = 0;
		}
	}
$error && &error(&text('notallowed', '`' . &html_escape($file) . '`',
		   '`' . &html_escape(join(" , ", @allowed_paths)) . '`.'));
}

sub clean_mimetype
{
my ($f) = @_;
my $t = mimetype($f);
eval { utf8::encode($t) if (utf8::is_utf8($t)) };
return $t;
}

sub test_allowed_paths
{
if (@allowed_paths == 1 && $allowed_paths[0] eq '/') {
	return 0;
	}
return 1;
}

1;