#!/usr/bin/perl -w
# This code is a part of Slash, and is released under the GPL.
# Copyright 1997-2001 by Open Source Development Network. See README
# and COPYING for more information, or see http://slashcode.com/.
# $Id: slashcode-dearchive,v 1.2.2.3 2001/08/06 16:18:15 cliff Exp $

use strict;
use File::Basename;
use FindBin '$Bin';
use Getopt::Std;
use Slash::DB;
use Slash::DB::Utility;
use Date::Manip;

(my $VERSION) = ' $Revision: 1.2.2.3 $ ' =~ /\$Revision:\s+([^\s]+)/;
my $PROGNAME = basename($0);
(my $PREFIX = $Bin) =~ s|/[^/]+/?$||;


# REGULAR EXPRESSION DEFINITIONS

# Enclosure defs.

my $enclosure_regexps = {
	"Slash v0.9.2+"	=> {
		regexp			=>
'<!-- begin comment block -->(.+?)<!-- end comment block -->',
		extractors		=> '*',
		id_extractors 	=> '*'
	},
	'Slashdot Jan/00+' => {
		regexp			=>
'(?:<TR><TD>.+?)?<TR>(?:<TD bgcolor=cccccc>|<TD bgcolor="#CCCCCC">) ?(<(?i:A NAME).+?</TD></TR>.+?)</TD> ?</TR> ',
		extractors		=> '*',
		id_extractors	=> '*',
	},
};

# Extractor defs.

my %extractor_regexps = (
	'Slash v0.9.2+' 	=>
'<A NAME="(.+?)"><B>(.+?)</B></A>(.+?)</FONT>.+?by (.+?) on (.+?)\(.+?\)</FONT><BR>.+?<FONT.+?>(?:\(.+?User Info</A>\).+?(?:<A HREF="(.+?)">(.+?)</A><BR>)?)?.+?<TR><TD BGCOLOR=.+?>.+?</TD>.+?<TR><TD BGCOLOR=.+?>(.+?)</TD>',
	'Slashdot Jan/00+'	=>
'^<(?i:A NAME)="([^>]+?)"><B>(.+?)?</B></A>(.+?)<BR> by (.+?)  ?on ((?:Mon|Tue|Wed|Thur|Fri|Sat|Sun|Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec).+?)<BR>  ?(?:\(.+?User (?:#\d+ )?Info</A>\)  ?(?i:<A HREF="([^>]+?)">(.+?)</A><BR> *)?)?</TD></TR> <TR> ?<TD(?: bgcolor=ffffff)?>(.+)<BR>',
#'^<A name="([^>]+?)"><B>(.+?)</B></A>(.+?)<BR> by (.+?) on (.+?)<BR> (?:\(.+?User Info</A>\) (?:<A href="([^>]+?)">(.+?)</A><BR>)?)? </TD></TR> <TR><TD bgcolor=ffffff>(.+?)<BR>(.+?)?</TD></TR> (?:<TR><TD> |<LI><FONT size=2><B>.+)?$'
);

# SID extration defs.

my %idextractor_regexps = (
	'Slash v0.9.2+'		=>
'<INPUT (?i:TYPE="?HIDDEN"? NAME)="?returnto"? (?i:VALUE)="?(?:[^>]+?)?article\.pl\?sid=([^>]+?)"?>',
);

# Think about having regular expressions that can be applied to extracted
# stories to look for parent information.
#
# - Cliff 6/6/01


my %opts;
# Remember to doublecheck these match usage()!
usage('Options used incorrectly')
	unless getopts('u:I:f:y:E:N:CDV?hv', \%opts);
usage() if ($opts{'h'} || !keys %opts);
usage("Must specify both -f and -u!") if !$opts{f} || !$opts{u};
version() if $opts{'v'};

my($virtuser, $year, $infile, $enclosure, $extractor, $sid, $ovrw, $confirm, $debug)=
	@opts{qw[u y f N E I V C D]};
$virtuser||= 'slash';
$year	 ||= UnixDate('now', '%Y');

# Initialize Slash site database object.
my $slashdb = new Slash::DB($virtuser) ||
	die "*** Can't open database on Virtual User $virtuser.\n";

# Set our timezone and initialize the date routines.
$ENV{TZ} = 'EST5EDT';
&Date_Init();

# Globals.
my(%data);
my $ac_uid = $slashdb->getVar('anonymous_coward_uid', 'value');
my $ac_nickname = $slashdb->getUser($ac_uid, 'nickname');

# We slurp in everything as one big file. This will NOT be pleasant on machines
# with low amounts of memory (anything < 32M; quite a few Slashdot .shtml files
# can amass well over one meg in size and that's for a SINGLE scalar.
my($bigscalar, $test_xdata, $errors);

die "Can't open INFILE '$infile'\n" if ! -f $infile;
do {
	local $/ = undef;

	open(INPUT, "<$infile");
	$bigscalar = <INPUT>;
	close(INPUT);
	# Remove newlines, they only get in the way.
	$bigscalar =~ s/\n/ /g;
};

# Determine which enclosure and extractor regular expressions to use for the given
# file; note that choices for enclosures and/or extractors can be forced by command
# line options.
if (!$enclosure || !$extractor) {
	my(@enclosures);
	push (@enclosures, ($enclosure) ? $enclosure : sort keys %{$enclosure_regexps});
	$enclosure='';
	for (@enclosures) {
		printf STDERR "%s ENCLOSURE '$_'\n", ($enclosure) ? 'Using':'Trying'
			if $debug;
		$enclosure = $_ if $bigscalar =~ /$enclosure_regexps->{$_}->{regexp}/s;
		next if ! $enclosure;
		if (! $extractor) {
			$test_xdata = $1;

			my @extractors;
			if (ref $enclosure_regexps->{$_}->{extractors} eq 'ARRAY') {
				push @extractors, @{$enclosure_regexps->{$_}->{extractors}};
			} elsif ($enclosure_regexps->{$_}->{extractors} eq '*') {
				push @extractors, sort keys %extractor_regexps;
			}
			for (@extractors) {
				print STDERR "\tTrying EXTRACTOR '$_'\n" if $debug;
				if ($test_xdata =~ /$extractor_regexps{$_}/s) {
					$extractor = $_;
					last;
				}
			}
		}
		last if $enclosure && $extractor;
	}
}
die "$infile: Can't determine enclosure/extractor pair!\n" if !$enclosure && !$extractor;
die <<EOT if !$extractor;
$infile: Enclosure '$enclosure' matched, but no extractor found!

Enclosure returned:
$test_xdata
EOT
print "Using Enclosure '$enclosure' and Extractor '$extractor'\n";

if (! $sid) {
	for (sort keys %idextractor_regexps) {
		print STDERR "Trying ID EXTRACTOR '$_'..." if $debug;
		if ($bigscalar =~ /$idextractor_regexps{$_}/s) {
			print STDERR "found ID " if $debug;
			$sid = $1;
			last;
		} else {
			print STDERR "\n";
		}
	}
} else {
	print STDERR 'Using ID ' if $debug;
}
die "\n$infile: Can't find ID using any extractor!\n" if !$sid;
print STDERR "'$sid'\n" if $debug && $sid;
if ($slashdb->sqlSelect('*', 'comments', 'sid=' . quote($sid))) {
	if (!$ovrw) {
		print "Data already exists for article '$sid'!!\n";
		exit 1;
	} else {
		print "Deleting all existing comments from article '$sid'\n";
		$slashdb->sqlDo('DELETE FROM comments WHERE sid=' . quote($sid));
	}
}
print "Beginning extraction for article '$sid'...\n";

if ($confirm) {
	print "\n\n<Hit RETURN to begin, ^C to abort execution>\n\n";
	my $input = <STDIN>;
}

my($en_regexp, $ex_regexp) = 	($enclosure_regexps->{$enclosure}->{regexp},
								 $extractor_regexps{$extractor});
$errors = 0;
pos $bigscalar = 0;
while ($bigscalar =~ /$en_regexp/sg) {
	my($uid, $cid, $email_addy, $uid_s, $x_data, $wait, $result, $resultpos);
	my($subj, $score_ind, $username, $ts, $url, $url_name, $comment, $sig);
	my($gmt_time, $score, $posttime, $uname);
	my(%uid_cache, $gmt_ts, $rc);

	$x_data = $1;
	$result = 'Unextracted ';
	$resultpos = '';

	if ($x_data =~ /$ex_regexp/s) {
		# This is ugly...
		($cid,
		 $subj, 
		 $score_ind, 
		 $username, 
		 $ts, 
		 $url, 
		 $url_name, 
		 $comment,
		 $sig) = ($1, $2, $3, $4, $5, $6, $7, $8, $9);

		next if !$cid;

		printf 	STDERR
			"EXTRACTED: %d, %d, %d, %d, %d, %d, %d, %d, %d\n",
			map { ($_) ? $_ : ''; 1 }
			($cid, $subj, $score_ind, $username, $ts, $url,
			 $url_name, $comment, $sig)
		if $debug;

		# Copy $username.
		$uname = $username;
		# Extract and remove email information.
		if ($uname =~ s/<B><FONT.+?>\((.+?)\)<\/FONT><\/B>//) {
			$email_addy = $1;
		}

		# Fix $uname if it is a link.
		$uname =~ s/<(?i:A HREF)=".*?">(.+?)<\/A>.+$/$1/s;
		# Remove any and all backtics (`) from the user name since this breaks
		# the API for some reason.
		$uname =~ s/\`//g;

		# Grab score from indicator.
		if ($score_ind =~ /Score:(\d+)/) {
			$score = $1 if defined $1;
		}

		# Strip signature of </TD> and </TR> tags (these are part of display
		# code)
		$sig =~ s!(?:</TD>|</TR>)!!g if $sig;

		($rc, $result) = ('', '');
		$uid_s = defined $email_addy ? " <$email_addy>" : '';

		# Use database to see if we can match the nickname to a UID.
		if ($uname && $uname ne $ac_nickname) {
			# Check user id cache for hit on the parsed username.
			$uid = 0;
			if ($uid_cache{$uname}) {
				$uid = $uid_cache{$uname};
			} else {
				$uid = $slashdb->getUserUID($uname);
				$uid_cache{$uname} = $uid if $uid;
			}
			$uid_s .= " ($uid)" if $uid;
		} else {
			$uid = $ac_uid if $uname eq $ac_nickname;
		}

		# Begin clean up routines....these routines are REAL site specific
		# so someone should look in to extending the data structures above
		# to make it less so. I may if I actually get some time to play 
		# around with this code a bit more, but that's extremely low 
		# priority right now. Maybe come around 2.2 or 2.4 release time.
		#
		#						- Cliff 3/22/2001

		# Convert date to internal representation and then adjust for GMT
		# time (since all times should be stored as GMT in dB).
		if ($ts) {
			# Some versions of dispComment have the a link to the comment
			# right after the date. This should be removed.
			$ts =~ s/\(<A (?i:HREF).+?<\/A>\)//i;

			# Get rid of the extraneous commas and '@' symbols which may 
			# interfere with parsing.
			$ts =~ s/,\s@/ /g;

			# Date::Manip balks if DoW is present in a datespec which specifies
			# no year value and does NOT represent a date within the current
			# year. So the simple solution is to strip the DoW which appears
			# at the beginning of the string. This really depends on the site
			# but this is the default for Slashcode and also works on Slashdot.
			$ts =~ s/(?:Mon|Tues|Wednes|Thurs|Fri|Satur|Sun)day\s+//;

			# Now we must INSURE that the proper year is set. Note that Date::Manip
			# will use the CURRENT YEAR if it isn't specified in the string, so
			# we'll have to carefully insert the year into the timestamp.
			# 
			# The following assumes that $ts will always be of the form:
			#		<Month> <Day> <Time> <Zone>
			$ts =~ s/(\w+ \d+)/$1, $year/;

			# Now grab the zone associated with the date.
			$ts =~ /\s([^\ ]+?)$/;
			
			# Need $oldPos becuase Date::Manip routines mess with $_.
			my($oldPos) = pos $_;
			my($tsdate, $tszone) = (ParseDate($ts), $1);
			
			# Insure date is set to the correct year based on parameters.
			# Could manually set this by SID, but SID isn't really 
			# Y2K compliant...
			$tsdate = Date_SetDateField($tsdate, 'y', $year);

			if ($tsdate) {
				$gmt_ts = Date_ConvTZ($tsdate, $tszone, 'GMT');
				$ts .= ' (' . UnixDate($gmt_ts, "%A %B %d, %Y \@%r GMT") . ')';
			}
			pos $_ = $oldPos;
		}

		# Attribute comment to the proper nickname in the comment if the 
		# user doesn't turn up in the database. Be sure to use the 
		# sanitized user name since $username may contain characters that
		# will confuse DBI.
		$comment = "Posted by $uname:<BR><BR>$comment" if (! $uid);

		print	"\n", header("Extracted ${\(length($x_data))} bytes"),
				($cid ? "#$cid\n" : ""),
				($subj ? "Subj: $subj\n": ""),
				($uname ? "User: $uname$uid_s\n" : ""),
				($ts ? "Date: $ts\n" : ""),
				($url_name ? "URL: $url_name " : ""),
				($url ? "($url)\n" : ($url_name ? "\n" : "")),
				($score ? "Score: $score" : ""),
				($comment ? "\n--> $comment\n\n" : "\n"),
				($sig ? "\nSig: $sig\n\n" : "\n")
		if $debug;

		if ($confirm) {
			print "<Hit RETURN for Next Comment>";
			my $input = <STDIN>;
		}

		# Assign data to hash.
		$data{$cid}->{subject} = $subj || '';
		$data{$cid}->{'-uid'} = $uid || $ac_uid;
		$data{$cid}->{date} = $gmt_ts;
		$data{$cid}->{comment} = $comment;
		$data{$cid}->{'-points'} = ($score) ? $score : 0;
	}

	print header("${result}X-Data$resultpos") . "$x_data\n"
		if $debug;
	if ($result eq 'Unextracted ' || $rc || 
		$comment =~ /<\/?TD>/ || 
		$comment =~ /<\/?TR>/)
	{
		if ($debug) {
			print '--- Check  data ---';
			$wait = <STDIN>;
		}
		$errors++;
	}
}

# Unload massive scalar (would setting $bigscalar to undef be a bad thing here?)
$bigscalar  = '';

# Now write data to database.
print "Writing to database...";
my $nr = 0;
foreach (keys(%data)) {
	# We process comments into the database by CID and let it worry about
	# all of the sorting.

	# Copy and sanitize data for insert into the comments table.
	my(%sqldata) = %{$data{$_}};
	$sqldata{sid} = $sid;
	$sqldata{'-cid'} = $_;
	# Until nested mode support can be coded in, Parent ID data will be lost.
	$sqldata{'-pid'} = 0;
	# Since host_name information is not included in the .shtml, we lose that
	# information as well.
	$sqldata{host_name} = '';
	# This data isn't as important. It would be a pain in the ass to go thru
	# and collect the moderation data for proper insertion, so it's just
	# easier to leave it out for now.
	$sqldata{'-lastmod'} = -1;
	$sqldata{'-reason'} = 0;
	$sqldata{'date'} = UnixDate($data{$_}->{date}, '%Y-%m-%d %H:%M');

	# Can $slashdb return meaningful errors if one of its methods fails?
	#
	# Use createComments(), here...especially since the comment system
	# is changing and these details should be behind the API.
	if ($slashdb->sqlInsert('comments', \%sqldata)) {
		$nr++;
	} else {
		print "\nError occured while inserting comment #$_!\n";
	}
}

print "\n$nr records written to COMMENTS for SID '$sid'\n";
print "*** $errors errors occured during processing.\n" if $errors;


0;


sub header {
	my($text) = shift;

	"$text\n${\('-' x length($text))}\n";
}


# It would be nice if the Slash DB API would provide this.
sub quote {
	my($text) = shift;

	$text =~ s/([\W\D])/\\$1/g;
	$text = "'$text'";
	$text;
}


sub usage {
	print "*** $_[0]\n" if $_[0];
	my (@enlist)	= sort keys %{$enclosure_regexps};
	my (@exlist)	= sort keys %extractor_regexps;
	my (@idexlist)	= sort keys %idextractor_regexps;
	local $" = "\t\t";
	printf <<EOT, "@enlist", "@exlist", "@idexlist";

Usage: $PROGNAME [options]

	Command line options:
		-u <virtuser> 
		-f <filename>
		-I <discussion ID>
		-y <year>
		-N <comment enclosure name>
		-E <comment extractor name>
	
	Command line switches:
		-C	Confirms all options and provides prompts during 
			processing operations. Used primarily for debugging.
		-V	Overwrite any comments for the given discussion ID.
		-D	Debug mode.

Notes:
	If -I is not given, then the program will cycle thru all defined ID
	extractors in an attempt to find a key suitable for database insertion.
	If no ID can be found, then the program will quit with an error and the
	use of -I will be required.

Defined comment enclosures:
	%s

Defined comment extractors:
	%s

Defined ID extractors:
	%s

EOT

	exit;

}


sub version {
	print <<EOT;

$PROGNAME $VERSION

This code is a part of Slash, and is released under the GPL.
Copyright 1997-2001 by Open Source Development Network. See README
and COPYING for more information, or see http://slashcode.com/.

EOT
	exit;
}

__END__