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#!/usr/bin/perl
use v5.12;
use warnings;
# Default configuration
my $format_full = '(%a %y)';
my $format_extra = '(%y)';
my $format_list = '%a (%y). {\fI%t\fR}. {\*Q%q\*U}. %n, %d. %c: %p. {Available: %w.}';
# Internal variables
my $author_last = 0; # whether the previous reference field was Ra
my @lines;
my $i = -1;
my @refs;
while (<>) {
# Formats
if (/^\.Ff +(.*)/) { $format_full = $1; next; }
if (/^\.Fx +(.*)/) { $format_extra = $1; next; }
if (/^\.Fl +(.*)/) { $format_list = $1; next; }
# Reference definitions
if (/^\.R([a-z]) +(.*)/) {
my ($fld, $def) = ($1, $2);
if ($fld eq 'a') {
$i++ if not $author_last;
push @lines, ".R! $i";
if (defined $refs[$i]{a}) {
$refs[$i]{a} = "; $def";
} else {
$refs[$i]{a} = $def;
}
$author_last = 1;
next;
} elsif ($fld =~ /[cdnpqtwy]/) {
$refs[$i]{$fld} = $def;
$author_last = 0;
next;
}
}
# Non-rf line
push @lines, $_;
}
$i = -1;
for (@lines) {
$i++;
# Inline reference
if (/^\.R([fx]) +(.*)/) {
my ($fld, $def) = ($1, $2);
$def =~ s/ ([.,:;\])]) ?([\[(])?$//;
my ($suffix, $prefix) = ($1, $2);
my $winner = 0;
my @words = split /\s/, $def;
my @points;
# replace '' with preceding word
for (@words) {
if ($_ eq "''") {
$_ = $lines[$i-1];
$_ =~ s/^.*\s(\S+)\s*$/$1/;
}
}
for (my $i = 0; $i < scalar @refs; $i++) {
$points[$i] = 0 if not defined $points[$i];
$points[$i] += 100 if likeness($refs[$i]{a}, @words);
$points[$i] += 50 if likeness($refs[$i]{y}, @words);
$points[$i] += 1 * likeness($refs[$i]{t}, @words);
$points[$i] += 1 * likeness($refs[$i]{q}, @words);
$winner = $i if $points[$i] > $points[$winner];
}
if (not defined $winner) {
print STDERR "Error: Reference '$def' could not be resolved.\n";
exit 1;
}
if ($points[$winner] < 11) {
print STDERR "Warning: Guessing that reference '$def' refers to " . fmt($format_full, $winner) . ".\n";
}
if ($fld eq 'f') {
no warnings;
print $prefix . fmt($format_full, $winner) . "$suffix\n";
} else {
no warnings;
print $prefix . fmt($format_extra, $winner) . "$suffix\n";
}
next;
}
# Reference definition
if (/^\.R! (\d+)/) {
print fmt($format_list, $1, 1) . "\n";
next;
}
# Non-rf line
print "$_";
}
sub fmt {
my ($fmt, $i, $full) = @_;
my %ref = %{$refs[$i]};
for my $fld (split //, 'acdnpqtwy') {
if ($ref{$fld}) {
no warnings;
my $val = $ref{$fld};
$val = fmta($val) if $fld eq 'a' and not $full;
$fmt =~ s/\{([^{}%]*)%\Q$fld\E([^{}]*)}/$1$val$2/g;
$fmt =~ s/%\Q$fld\E/$val/g;
} else {
no warnings;
$fmt =~ s/[.(]?\{([^{}%]*)%\Q$fld\E([^{}]*)}[.,:;)]?//g;
$fmt =~ s/[.(]?%\Q$fld\E[.,:;)]?//g;
}
}
$fmt =~ s/ +/ /g;
#$fmt =~ s/([(]) +/$1/;
#$fmt =~ s/ +([.,)])/$1/;
$fmt =~ s/^ *//;
$fmt =~ s/ *$//;
return $fmt;
}
sub fmta {
my ($a) = @_;
my $r;
for my $name (split /; /, $a) {
if ($name =~ /(.*?),/) {
$r .= ", $1";
} else {
$name =~ s/(.*?)\s/$1/;
return ", $name";
}
}
$r =~ s/^, //;
return $r;
}
sub likeness {
my ($string, @strings) = @_;
my $r = 0;
return 0 if not defined $string;
for (@strings) {
$r += 1 if index($string, $_) != -1;
}
return $r;
}
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