#!/usr/local/bin/perl

use warnings;
use strict;
use vars qw(%opts $author_rx $pubtype_rx %pubmap %titlemap);
use Getopt::Std;

sub usage {
    my $err = shift || '';
    print $err, <DATA>;
    exit;
}

$opts{t} = '.*'; # default
getopts('ha:d:t:', \%opts) or usage "Invalid Args.\n";

usage() if $opts{h};

usage "Missing Mandatory Args.\n" unless defined $opts{d} and defined 
+$opts{a};

$author_rx = qr/\Q$opts{a}/;
$pubtype_rx = qr/$opts{t}/;

open TITLES, "$opts{d}/titles.dbase" or die "couldn't open titles.dbas
+e file";
open PUBS,   "$opts{d}/pubs.dbase"   or die "couldn't open pubs.dbase 
+file";

while (<TITLES>) {
    my $line = $_;
    chomp $line;
    
    # split ignores trailing empty fields unless you ask for
    # a specific number of fields (ignore trailing |) ...
    my @fields = split /\|/, $line, ($line =~ tr/|/|/);
    
    next unless $fields[1] =~ /$author_rx/;
    
    foreach my $pubcode (split /\,/, $fields[5]) {
    $pubmap{$pubcode} = [] unless exists $pubmap{$pubcode};
    push @{$pubmap{$pubcode}}, $line;
    }
}

while (<PUBS>) {
    my $line = $_;
    chomp $line;

    # split ignores trailing empty fields unless you ask for
    # a specific number of fields (ignore trailing |) ...
    my @fields = split /\|/, $line, ($line =~ tr/|/|/);
    
    next unless exists $pubmap{$fields[0]};
    next unless $fields[8] =~ /$pubtype_rx/;
    
    foreach my $titleline (@{$pubmap{$fields[0]}}) {
    my $title = (split /\|/, $titleline)[0];
    $titlemap{$title} = [] unless exists $titlemap{$title};
    push @{$titlemap{$title}}, "$title|$line$titleline\n";
    }
}

foreach my $title (sort keys %titlemap) {
    foreach my $line (@{$titlemap{$title}}) {
    print $line;
    }
}
__END__
    
 Usage:
    
   isfdb-list-author.pl -d dbase_compiled_dir -a auth_substr [-t pubty
+pe_regex ]

 Examples:

   isfdb-list-author.pl -d ~/isfdb/dbase.compiled -a Asimov
   isfdb-list-author.pl -d ~/isfdb/dbase.compiled -a 'G. Harry Stine^L
+ee Correy'
   isfdb-list-author.pl -d ~/isfdb/dbase.compiled -a Asimov -t 'hc|pb'
   isfdb-list-author.pl -d ~/isfdb/dbase.compiled -a Asimov -t '^$'

 Output:

   One record per title/pub combo that mathches the specified criteria
+.  The
   1st field is the title, after that comes all of the fields about th
+e
   publication, and then all of the fields about the title.  In standa
+rd ISFDB
   compiled DB format there is a trailing | after the last field.