398 lines
		
	
	
		
			11 KiB
		
	
	
	
		
			Perl
		
	
	
		
			Executable File
		
	
	
	
	
			
		
		
	
	
			398 lines
		
	
	
		
			11 KiB
		
	
	
	
		
			Perl
		
	
	
		
			Executable File
		
	
	
	
	
#!/usr/bin/env perl
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#===============================================================================
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#
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#         FILE: find_series
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#
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#        USAGE: ./find_series
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#
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#  DESCRIPTION: Gathers information from the HPR database to assist with the
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#               process of placing episodes into series groups
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#
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#      OPTIONS: ---
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# REQUIREMENTS: ---
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#         BUGS: ---
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#        NOTES: ---
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#       AUTHOR: Dave Morriss (djm), Dave.Morriss@gmail.com
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#      VERSION: 0.0.5
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#      CREATED: 2014-04-25 17:11:21
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#     REVISION: 2016-06-15 15:51:55
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#
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#===============================================================================
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use v5.16;
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use strict;
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use warnings;
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use utf8;
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use Config::General;
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use List::MoreUtils qw(uniq);
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use YAML::XS qw{LoadFile};
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use DBI;
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use Data::Dumper;
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#
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# Version number (manually incremented)
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#
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our $VERSION = '0.0.5';
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#
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# Various constants
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#
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( my $PROG = $0 ) =~ s|.*/||mx;
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( my $DIR  = $0 ) =~ s|/?[^/]*$||mx;
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$DIR = '.' unless $DIR;
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#-------------------------------------------------------------------------------
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# Declarations
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#-------------------------------------------------------------------------------
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#
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# Constants and other declarations
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#
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my $basedir    = "$ENV{HOME}/HPR/Database";
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my $configfile = "$basedir/.hpr_db.cfg";
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my $ignorefile = "$basedir/.$PROG.yml";
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my $file_template = "${PROG}_%d.out";
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my ( $dbh,    $sth1,    $h1 );
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my ( @ignore, $title,   @words, $pair );
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my ( %eps,    %tags,    @taglist, %single_words, %double_words );
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my ( $phase,  $outfile, $outfh );
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#
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# Enable Unicode mode
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#
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binmode STDOUT, ":encoding(UTF-8)";
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binmode STDERR, ":encoding(UTF-8)";
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#
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# Load YAML ignore list
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#
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my $yaml = LoadFile($ignorefile);
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@ignore = uniq( @{ $yaml->{ignore} } );
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#
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# Load database configuration data
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#
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my $conf = Config::General->new(
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    -ConfigFile      => $configfile,
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    -InterPolateVars => 1,
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    -ExtendedAccess  => 1
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);
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my %config = $conf->getall();
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#-------------------------------------------------------------------------------
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# Connect to the database
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#-------------------------------------------------------------------------------
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my $dbhost = $config{database}->{host} // '127.0.0.1';
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my $dbport = $config{database}->{port} // 3306;
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my $dbname = $config{database}->{name};
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my $dbuser = $config{database}->{user};
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my $dbpwd  = $config{database}->{password};
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$dbh = DBI->connect( "dbi:mysql:host=$dbhost;port=$dbport;database=$dbname",
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    $dbuser, $dbpwd, { AutoCommit => 1 } )
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    or die $DBI::errstr;
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#
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# Enable client-side UTF8
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#
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$dbh->{mysql_enable_utf8} = 1;
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#
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# Prepare to collect episode titles with the series it's related to
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#
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$sth1 = $dbh->prepare(
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    q{SELECT
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            eps.id AS eps_id,
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            eps.date,
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            eps.title,
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            eps.duration,
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            eps.summary,
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            eps.notes,
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            eps.hostid,
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            eps.series,
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            eps.explicit,
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            eps.license,
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            eps.tags,
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            eps.version,
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            eps.downloads,
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            eps.valid AS eps_valid,
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            ms.id AS ms_id,
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            ms.name,
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            ms.description,
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            ms.private,
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            ms.image,
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            ms.valid AS ms_valid
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        FROM eps
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        JOIN miniseries ms ON eps.series = ms.id
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        WHERE eps.valid = 1}
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);
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$sth1->execute;
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if ( $dbh->err ) {
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    warn $dbh->errstr;
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}
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#
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# Generate an output file for phase 1
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#
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$phase = 1;
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newOutput( \$outfh, $file_template, $phase++ );
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print $outfh "Show  (Series) Title\n";
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#-------------------------------------------------------------------------------
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# Walk through the episode/series list from the database and build structures
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# from them.
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#-------------------------------------------------------------------------------
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# The structures built are:
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#
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# %eps - a hash indexed by the episode number with an arrayref as the
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# value. The arrayref starts with the episode title and is followed by the
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# important words from the title in lower case. The term "important" means
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# that the word must consist of the allowed characters and not be in the
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# 'ignore' list.
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#
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# %tags - a hash indexed by the episode number with a CSV string of tags
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# associated with the episode as the value.
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#
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# %single_words - a hash indexed by one of the words collected from the title
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# (see %eps above). The value of each element is complex. It consists of an
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# arrayref, the first element of which is a count of the succeeding elements.
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# The next N elements are arrayrefs each of which contains two elements: an
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# episode number and an episode title. Here is an example in Data::Dumper
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# format:
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#
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# 'pre-ibm' => [
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#                2,
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#                [
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#                  687,
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#                  'pre-IBM PC computer history 1'
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#                ],
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#                [
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#                  691,
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#                  'pre-IBM PC computer history 2'
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#                ]
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#              ],
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#
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#-------------------------------------------------------------------------------
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while ( $h1 = $sth1->fetchrow_hashref ) {
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    #
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    # Report what we found
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    #
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    printf $outfh "%4d: (%-2d)     %s\n", $h1->{eps_id}, $h1->{ms_id},
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        $h1->{title};
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    #
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    # Skip this episode if it already has a series
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    #
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    next if $h1->{series} > 0;
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    #
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    # Save this episode for later
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    #
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    $eps{ $h1->{eps_id} } = [ $h1->{title} ];
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    #
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    # Save tag details
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    #
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    $tags{ $h1->{eps_id} } = $h1->{tags};
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    #
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    # Strip any trailing full stop, and chop the title into words
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    #
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    ( $title = $h1->{title} ) =~ s/\.$//;
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    @words = split( /\s+/, $title );
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    #
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    # Remove all unwanted characters and force to lowercase (use 'fc' for case
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    # folding since it's aware of character sets)
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    #
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    foreach my $word (@words) {
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        $word =~ s{[^a-zA-Z./_-]}{}g;
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        $word = fc($word);
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    }
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    #
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    # Clean up the word list after removing unwanted characters
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    #
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    @words = grep { $_ !~ /^-*$/ } @words;
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    #
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    # Extract pairs of words before they're made unique and make a hash
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    # pointing to the episodes they originated from
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    #
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    for (my $i = 0; $i < $#words; $i++) {
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        $pair = "$words[$i] $words[$i+1]";
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        if ( exists( $double_words{$pair} ) ) {
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            $double_words{$pair}->[0] += 1;
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            push( @{ $double_words{$pair} },
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                [ $h1->{eps_id}, $h1->{title} ] );
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        }
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        else {
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            $double_words{$pair} = [ 1, [ $h1->{eps_id}, $h1->{title} ] ];
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        }
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    }
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    #
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    # Make the word list unique
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    #
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    @words = uniq(@words);
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    #
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    # Walk the tidied single word list
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    #
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    foreach my $word (@words) {
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        #
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        # Ignore very short words and words in the ignore list
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        #
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        next if length($word) < 2;
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        next if grep( /^$word$/, @ignore );
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        #
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        # Save this word in the episodes hash
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        #
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        push( @{ $eps{ $h1->{eps_id} } }, $word );
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        #
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        # If the word is not known initialise the entry containing an arrayref
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        # with a counter and another arrayref with the saved episode number
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        # and title. If it's known, increment the counter and stash the
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        # episode details as another arrayref.
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        #
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        if ( exists( $single_words{$word} ) ) {
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            $single_words{$word}->[0] += 1;
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            push( @{ $single_words{$word} },
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                [ $h1->{eps_id}, $h1->{title} ] );
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        }
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        else {
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            $single_words{$word} = [ 1, [ $h1->{eps_id}, $h1->{title} ] ];
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        }
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    }
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}
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#
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# We've finished with the database
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#
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$dbh->disconnect;
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#-------------------------------------------------------------------------------
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# Done the first pass, prepare for the next
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#-------------------------------------------------------------------------------
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newOutput( \$outfh, $file_template, $phase++ );
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#
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# Process the saved data in increasing order of the frequency. Print the word
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# and its frequency and follow that by the stashed episode details in the
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# order we saw them
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#
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foreach my $key (
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    sort { $single_words{$a}->[0] <=> $single_words{$b}->[0] }
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    sort( keys(%single_words) )
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    )
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{
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    if ( $single_words{$key}->[0] > 3 ) {
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        printf $outfh "%15s: %s\n", $key, $single_words{$key}->[0];
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        for ( my $i = 1; $i <= $single_words{$key}->[0]; $i++ ) {
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            printf $outfh "%17s%4d: %s", ' ', @{ $single_words{$key}->[$i] };
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            @taglist
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                = split( /\s*,\s*/, $tags{ $single_words{$key}->[$i]->[0] } );
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            if (@taglist) {
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                print $outfh " [", join( ",", @taglist ), "]\n";
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            }
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            else {
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                print $outfh "\n";
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            }
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        }
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        print $outfh "\n";
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    }
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}
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#-------------------------------------------------------------------------------
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# Done the second pass, prepare for the next
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#-------------------------------------------------------------------------------
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newOutput( \$outfh, $file_template, $phase++ );
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#
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# Look through the collected data from the point of view of the episode, list
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# all the (relevant) words in the title in order and report their frequencies
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#
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for my $key ( sort { $a <=> $b } keys(%eps) ) {
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    printf $outfh "%4d: %s\n", $key, $eps{$key}->[0];
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    for ( my $i = 1; $i < scalar( @{ $eps{$key} } ); $i++ ) {
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        my $word = $eps{$key}->[$i];
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        printf $outfh "      %15s %d\n", $word, $single_words{$word}->[0];
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    }
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    print $outfh "\n";
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}
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#-------------------------------------------------------------------------------
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# Done the third pass, prepare for the next
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#-------------------------------------------------------------------------------
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newOutput( \$outfh, $file_template, $phase++ );
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#
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# So the pairs of words we collected earlier might show something interesting.
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# Let's see.
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#
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foreach my $key (
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    sort { $double_words{$a}->[0] <=> $double_words{$b}->[0] }
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    sort( keys(%double_words) )
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    )
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{
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    if ( $double_words{$key}->[0] > 3 ) {
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        printf $outfh "%15s: %s\n", $key, $double_words{$key}->[0];
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        for ( my $i = 1; $i <= $double_words{$key}->[0]; $i++ ) {
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            printf $outfh "%17s%4d: %s", ' ', @{ $double_words{$key}->[$i] };
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            @taglist
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                = split( /\s*,\s*/, $tags{ $double_words{$key}->[$i]->[0] } );
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            if (@taglist) {
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                print $outfh " [", join( ",", @taglist ), "]\n";
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            }
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            else {
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                print $outfh "\n";
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            }
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        }
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        print $outfh "\n";
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    }
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}
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close($outfh);
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exit;
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#===  FUNCTION  ================================================================
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#         NAME: newOutput
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#      PURPOSE: Generate a new output file
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#   PARAMETERS: $fh             a scalar ref pointing to a variable to hold a
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#                               file handle
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#               $template       a string suitable for sprintf for defining the
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#                               name of the output file
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#               $phase          an integer to be incorporated into the output
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#                               file name
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#      RETURNS: Nothing
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#  DESCRIPTION: Closes any existing file and opens a new one with the same
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#               file handle. The name of the file is derived from the template
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#               and the phase number.
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#       THROWS: No exceptions
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#     COMMENTS: None
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#     SEE ALSO: N/A
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#===============================================================================
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sub newOutput {
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    my ( $fh, $template, $phase ) = @_;
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    if ($$fh) {
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        close($$fh) if ( tell($$fh) > -1 );
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    }
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    my $outfile = sprintf( $template, $phase );
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    open( $$fh, '>:encoding(UTF-8)', $outfile )
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        or die "Unable to open $outfile\n";
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    return;
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}
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# vim: syntax=perl:ts=8:sw=4:et:ai:tw=78:fo=tcrqn21:fdm=marker
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