:
eval 'exec perl -S $0 ${1+"$@"}'
    if $running_under_some_shell;
##
##  shtml2phtml -- Convert (X)SSI script (.shtml) to ePerl script (.phtml)
##  Copyright (c) 1997 Ralf S. Engelschall, All Rights Reserved. 
##

$time = time();
$deftimefmt = "%A, %d-%b-%y %T %Z";
$preamble = "";
$BD = "<?";
$ED = "!>";

@CGIVARS = (
    #   standard CGI variables from CGI spec
    'SERVER_SOFTWARE',
    'SERVER_NAME',
    'GATEWAY_INTERFACE',
    'SERVER_PROTOCOL',
    'SERVER_PORT',
    'REQUEST_METHOD',
    'PATH_INFO',
    'PATH_TRANSLATED',
    'SCRIPT_NAME',
    'QUERY_STRING',
    'REMOTE_HOST',
    'REMOTE_ADDR',
    'AUTH_TYPE',
    'REMOTE_USER',
    'REMOTE_IDENT',
    'CONTENT_TYPE',
    'CONTENT_LENGTH',
    'HTTP_ACCEPT',
    'HTTP_USER_AGENT',
    #   additional CGI variables from Apache mod_rewrite
    'SCRIPT_FILENAME',
    'SCRIPT_URL',
);

sub add_to_preamble ($) {
    my ($cmd) = @_;

    $x = quotemeta($cmd);
    if ($preamble !~ m|$x|s) {
        $preamble .= $cmd;
    }
}

sub interpolate_variable ($) {
    my ($name) = @_;

    #   standard CGI variable
    if (grep("$name", @CGIVARS) eq $name) {
        return "\$ENV{'$name'}";
    }
    #   special ones
    elsif ($name eq 'LAST_MODIFIED') {
        &add_to_preamble("use POSIX;\n");   
        &add_to_preamble('$timefmt = "'.$deftimefmt.'";'."\n");     
        return 'strftime($timefmt, localtime((stat($ENV{"SCRIPT_SRC_FILE"}))[9]))',
    }
    elsif ($name eq 'DATE_LOCAL') {
        &add_to_preamble("use POSIX;\n");   
        &add_to_preamble('$timefmt = "'.$deftimefmt.'";'."\n");     
        return 'strftime($timefmt, localtime(time()))',
    }
    elsif ($name eq 'DATE_GMT') {
        &add_to_preamble("use POSIX;\n");   
        &add_to_preamble('$timefmt = "'.$deftimefmt.'";'."\n");     
        return 'strftime($timefmt, gmttime(time()))',
    }
    elsif ($name eq 'DOCUMENT_NAME') {
        return '\$ENV{"SCRIPT_SRC_FILE"};',
    }
    elsif ($name eq 'DOCUMENT_URI') {
        return '\$ENV{"SCRIPT_SRC_URL"};',
    }
    else {
        return '$'.$name;
    }
}

$in = "";
while (<STDIN>) {
    $in .= $_;
}

$out = "";
while ($in) {
    if ($in =~ m|(.*?)<!--#(.+?)\s*-->(.*)|s) {
        $out .= $1;
        $cmd = $2;
        $in = $3;
    }
    else {
        $out .= $in;
        last;
    }

    if ($cmd =~ m|config\s+timefmt="?(.+?)"?"\s*$|) {
        $out .= "$BD \$timefmt = \"$1\"; $ED";
    }
    elsif ($cmd =~ m|echo\s+var="?(.+?)"?"\s*$|) {
        $out .= "$BD print " . &interpolate_variable($1) . "; $ED";
    }
    elsif ($cmd =~ m|include\s+file="?(.+?)"?"\s*$|) {
        $out .= "\n#include \"$1\"\n";
    }
    elsif ($cmd =~ m|include\s+virtual="?(.+?)"?"\s*$|) {
        $out .= "\n#include \"$1\"\n";
    }
    elsif ($cmd =~ m|printenv\s*$|) {
        $out .= "$BD foreach \$k (sort(keys(\%ENV))) { print \"\$k=\$ENV{\$k}\\n\"; } $ED";
    }
    elsif ($cmd =~ m|set\s+var="?(.+?)"?\s+value="?(.+?)"?\s*$|) {
        $out .= "$BD \$$1='$2'; $ED";
    }
    elsif ($cmd =~ m|exec\s+cgi="?(.+?)"?\s*$|) {
        &add_to_preamble("use LWP::Simple;\n");     
        $out .= "$BD print get('$1'); $ED";
    }
    elsif ($cmd =~ m|exec\s+cmd="?(.+?)"?\s*$|) {
        $out .= "$BD print `$1`; $ED";
    }
    elsif ($cmd =~ m|fsize\s+file="?(.+?)"?\s*$|) {
        $out .= "$BD print (stat(\"$1\"))[7]; $ED";
    }
    elsif ($cmd =~ m|fsize\s+virtual="?(.+?)"?\s*$|) {
        $out .= "$BD print (stat(\"$1\"))[7]; $ED";
    }
    elsif ($cmd =~ m|flastmod\s+file="?(.+?)"?\s*$|) {
        &add_to_preamble("use POSIX;\n");   
        &add_to_preamble('$timefmt = "'.$deftimefmt.'";'."\n");     
        $out .= "$BD print strftime(\$timefmt, (stat(\"$1\"))[9]); $ED";
    }
    elsif ($cmd =~ m|flastmod\s+virtual="?(.+?)"?\s*$|) {
        &add_to_preamble("use POSIX;\n");   
        &add_to_preamble('$timefmt = "'.$deftimefmt.'";'."\n");     
        $out .= "$BD print strftime(\$timefmt, (stat(\"$1\"))[9]); $ED";
    }
    elsif ($cmd =~ m|if\s+expr="?(.+?)"?\s*$|) {
        $expr = $1;
        $expr =~ s|=(\s/)|=~$1|g;
        $expr =~ s|!=(\s/)|!~$1|g;
        $expr =~ s|=\s|ne |g;
        $expr =~ s|!=\s|ne |g;
        $expr =~ s|&&|and|g;
        $expr =~ s|\|\||or|g;
        $out .= "\n#if $expr\n";
    }
    elsif ($cmd =~ m|elif\s+expr="?(.+?)"?\s*$|) {
        $expr = $1;
        $expr =~ s|=(\s/)|=~$1|g;
        $expr =~ s|!=(\s/)|!~$1|g;
        $expr =~ s|=\s|ne |g;
        $expr =~ s|!=\s|ne |g;
        $expr =~ s|&&|and|g;
        $expr =~ s|\|\||or|g;
        $out .= "\n#elsif $expr\n";
    }
    elsif ($cmd =~ m|else\s*$|) {
        $out .= "\n#else\n";
    }
    elsif ($cmd =~ m|endif\s*$|) {
        $out .= "\n#endif\n";
    }
}

print "$BD\n$preamble$ED\n";
print $out;

##EOF##