[1] | 1 | package MP3::Find::DB; |
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| 2 | |
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| 3 | use strict; |
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| 4 | use warnings; |
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| 5 | |
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| 6 | use base qw(MP3::Find::Base); |
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[10] | 7 | use Carp; |
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[1] | 8 | |
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| 9 | use DBI; |
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| 10 | use SQL::Abstract; |
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| 11 | |
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[29] | 12 | use MP3::Find::Util qw(get_mp3_metadata); |
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| 13 | |
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[1] | 14 | my $sql = SQL::Abstract->new; |
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| 15 | |
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[10] | 16 | my @COLUMNS = ( |
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| 17 | [ mtime => 'INTEGER' ], # the filesystem mtime, so we can do incremental updates |
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| 18 | [ FILENAME => 'TEXT' ], |
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| 19 | [ TITLE => 'TEXT' ], |
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| 20 | [ ARTIST => 'TEXT' ], |
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| 21 | [ ALBUM => 'TEXT' ], |
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| 22 | [ YEAR => 'INTEGER' ], |
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| 23 | [ COMMENT => 'TEXT' ], |
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| 24 | [ GENRE => 'TEXT' ], |
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| 25 | [ TRACKNUM => 'INTEGER' ], |
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| 26 | [ VERSION => 'NUMERIC' ], |
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| 27 | [ LAYER => 'INTEGER' ], |
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| 28 | [ STEREO => 'TEXT' ], |
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| 29 | [ VBR => 'TEXT' ], |
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| 30 | [ BITRATE => 'INTEGER' ], |
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| 31 | [ FREQUENCY => 'INTEGER' ], |
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| 32 | [ SIZE => 'INTEGER' ], |
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| 33 | [ OFFSET => 'INTEGER' ], |
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| 34 | [ SECS => 'INTEGER' ], |
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| 35 | [ MM => 'INTEGER' ], |
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| 36 | [ SS => 'INTEGER' ], |
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| 37 | [ MS => 'INTEGER' ], |
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| 38 | [ TIME => 'TEXT' ], |
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| 39 | [ COPYRIGHT => 'TEXT' ], |
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| 40 | [ PADDING => 'INTEGER' ], |
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| 41 | [ MODE => 'INTEGER' ], |
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| 42 | [ FRAMES => 'INTEGER' ], |
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| 43 | [ FRAME_LENGTH => 'INTEGER' ], |
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| 44 | [ VBR_SCALE => 'INTEGER' ], |
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| 45 | ); |
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| 46 | |
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[19] | 47 | my $DEFAULT_STATUS_CALLBACK = sub { |
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| 48 | my ($action_code, $filename) = @_; |
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| 49 | print STDERR "$action_code $filename\n"; |
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| 50 | }; |
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[10] | 51 | |
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[30] | 52 | =head1 NAME |
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| 53 | |
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| 54 | MP3::Find::DB - SQLite database backend to MP3::Find |
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| 55 | |
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| 56 | =head1 SYNOPSIS |
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| 57 | |
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| 58 | use MP3::Find::DB; |
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| 59 | my $finder = MP3::Find::DB->new; |
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[1] | 60 | |
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[30] | 61 | my @mp3s = $finder->find_mp3s( |
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| 62 | dir => '/home/peter/music', |
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| 63 | query => { |
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| 64 | artist => 'ilyaimy', |
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| 65 | album => 'myxomatosis', |
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| 66 | }, |
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| 67 | ignore_case => 1, |
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| 68 | db_file => 'mp3.db', |
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| 69 | ); |
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[1] | 70 | |
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[30] | 71 | # you can do things besides just searching the database |
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[10] | 72 | |
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[30] | 73 | # create another database |
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| 74 | $finder->create_db('my_mp3s.db'); |
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[1] | 75 | |
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[30] | 76 | # update the database from the filesystem |
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| 77 | $finder->update_db('my_mp3s.db', ['/home/peter/mp3', '/home/peter/cds']); |
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| 78 | |
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| 79 | # and then blow it away |
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| 80 | $finder->destroy_db('my_mp3s.db'); |
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[1] | 81 | |
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[30] | 82 | =head1 REQUIRES |
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| 83 | |
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| 84 | L<DBI>, L<DBD::SQLite>, L<SQL::Abstract> |
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| 85 | |
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| 86 | =head1 DESCRIPTION |
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| 87 | |
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| 88 | This is the SQLite database backend for L<MP3::Find>. |
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| 89 | |
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| 90 | B<Note:> I'm still working out some kinks in here, so this backend |
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| 91 | is currently not as stable as the Filesystem backend. |
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| 92 | |
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| 93 | =head2 Special Options |
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| 94 | |
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| 95 | =over |
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| 96 | |
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| 97 | =item C<db_file> |
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| 98 | |
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| 99 | The name of the SQLite database file to use. Defaults to F<~/mp3.db>. |
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| 100 | |
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| 101 | The database should have at least one table named C<mp3> with the |
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| 102 | following schema: |
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| 103 | |
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| 104 | CREATE TABLE mp3 ( |
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| 105 | mtime INTEGER, |
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| 106 | FILENAME TEXT, |
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| 107 | TITLE TEXT, |
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| 108 | ARTIST TEXT, |
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| 109 | ALBUM TEXT, |
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| 110 | YEAR INTEGER, |
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| 111 | COMMENT TEXT, |
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| 112 | GENRE TEXT, |
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| 113 | TRACKNUM INTEGER, |
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| 114 | VERSION NUMERIC, |
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| 115 | LAYER INTEGER, |
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| 116 | STEREO TEXT, |
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| 117 | VBR TEXT, |
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| 118 | BITRATE INTEGER, |
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| 119 | FREQUENCY INTEGER, |
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| 120 | SIZE INTEGER, |
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| 121 | OFFSET INTEGER, |
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| 122 | SECS INTEGER, |
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| 123 | MM INTEGER, |
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| 124 | SS INTEGER, |
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| 125 | MS INTEGER, |
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| 126 | TIME TEXT, |
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| 127 | COPYRIGHT TEXT, |
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| 128 | PADDING INTEGER, |
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| 129 | MODE INTEGER, |
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| 130 | FRAMES INTEGER, |
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| 131 | FRAME_LENGTH INTEGER, |
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| 132 | VBR_SCALE INTEGER |
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[1] | 133 | ); |
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[30] | 134 | |
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| 135 | =back |
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| 136 | |
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| 137 | =head1 METHODS |
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| 138 | |
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| 139 | =head2 new |
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| 140 | |
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| 141 | my $finder = MP3::Find::DB->new( |
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| 142 | status_callback => \&callback, |
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| 143 | ); |
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| 144 | |
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| 145 | The C<status_callback> gets called each time an entry in the |
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| 146 | database is added, updated, or deleted by the C<update_db> and |
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| 147 | C<sync_db> methods. The arguments passed to the callback are |
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| 148 | a status code (A, U, or D) and the filename for that entry. |
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| 149 | The default callback just prints these to C<STDERR>: |
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| 150 | |
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| 151 | sub default_callback { |
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| 152 | my ($status_code, $filename) = @_; |
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| 153 | print STDERR "$status_code $filename\n"; |
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[1] | 154 | } |
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| 155 | |
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[30] | 156 | To suppress any output, set C<status_callback> to an empty sub: |
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| 157 | |
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| 158 | status_callback => sub {} |
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| 159 | |
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| 160 | =head2 create_db |
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| 161 | |
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| 162 | $finder->create_db($db_filename); |
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| 163 | |
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| 164 | Creates a SQLite database in the file named c<$db_filename>. |
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| 165 | |
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| 166 | =cut |
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| 167 | |
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[29] | 168 | # TODO: convert to using DSNs instead of hardcoded SQLite connections |
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| 169 | # TODO: extended table for ID3v2 data |
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[10] | 170 | sub create_db { |
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| 171 | my $self = shift; |
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| 172 | my $db_file = shift or croak "Need a name for the database I'm about to create"; |
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| 173 | my $dbh = DBI->connect("dbi:SQLite:dbname=$db_file", '', '', {RaiseError => 1}); |
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| 174 | $dbh->do('CREATE TABLE mp3 (' . join(',', map { "$$_[0] $$_[1]" } @COLUMNS) . ')'); |
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| 175 | } |
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| 176 | |
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[29] | 177 | =head2 update |
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| 178 | |
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| 179 | my $count = $finder->update({ |
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| 180 | dsn => 'dbi:SQLite:dbname=mp3.db', |
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| 181 | files => \@filenames, |
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[30] | 182 | dirs => \@dirs, |
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[29] | 183 | }); |
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| 184 | |
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| 185 | Compares the files in the C<files> list plus any MP3s found by searching |
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| 186 | in C<dirs> to their records in the database pointed to by C<dsn>. If the |
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| 187 | files found have been updated since they have been recorded in the database |
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| 188 | (or if they are not in the database), they are updated (or added). |
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| 189 | |
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| 190 | =cut |
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| 191 | |
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[30] | 192 | # this is update_db and update_files (from Matt Dietrich) rolled into one |
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[29] | 193 | sub update { |
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| 194 | my $self = shift; |
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| 195 | my $args = shift; |
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| 196 | |
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| 197 | my $dsn = $args->{dsn} or croak "Need a DSN to connect to"; |
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| 198 | my @dirs = $args->{dirs} |
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| 199 | ? ref $args->{dirs} eq 'ARRAY' |
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| 200 | ? @{ $args->{dirs} } |
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| 201 | : ($args->{dirs}) |
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| 202 | : (); |
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| 203 | |
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| 204 | my @files = $args->{files} |
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| 205 | ? ref $args->{files} eq 'ARRAY' |
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| 206 | ? @{ $args->{files} } |
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| 207 | : ($args->{files}) |
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| 208 | : (); |
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| 209 | |
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| 210 | my $status_callback = $self->{status_callback} || $DEFAULT_STATUS_CALLBACK; |
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| 211 | |
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| 212 | my $dbh = DBI->connect($dsn, '', '', {RaiseError => 1}); |
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| 213 | my $mtime_sth = $dbh->prepare('SELECT mtime FROM mp3 WHERE FILENAME = ?'); |
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| 214 | my $insert_sth = $dbh->prepare( |
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| 215 | 'INSERT INTO mp3 (' . |
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| 216 | join(',', map { $$_[0] } @COLUMNS) . |
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| 217 | ') VALUES (' . |
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| 218 | join(',', map { '?' } @COLUMNS) . |
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| 219 | ')' |
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| 220 | ); |
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| 221 | my $update_sth = $dbh->prepare( |
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| 222 | 'UPDATE mp3 SET ' . |
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| 223 | join(',', map { "$$_[0] = ?" } @COLUMNS) . |
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| 224 | ' WHERE FILENAME = ?' |
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| 225 | ); |
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| 226 | |
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| 227 | my $count = 0; # the number of records added or updated |
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| 228 | my @mp3s; # metadata for mp3s found |
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| 229 | |
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| 230 | # look for mp3s using the filesystem backend if we have dirs to search in |
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| 231 | if (@dirs) { |
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| 232 | require MP3::Find::Filesystem; |
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| 233 | my $finder = MP3::Find::Filesystem->new; |
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| 234 | unshift @mp3s, $finder->find_mp3s(dir => \@dirs, no_format => 1); |
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| 235 | } |
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| 236 | |
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| 237 | # get the metadata on specific files |
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| 238 | unshift @mp3s, map { get_mp3_metadata({ filename => $_ }) } @files; |
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| 239 | |
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| 240 | # check each file against its record in the database |
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| 241 | for my $mp3 (@mp3s) { |
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| 242 | # see if the file has been modified since it was first put into the db |
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| 243 | $mp3->{mtime} = (stat($mp3->{FILENAME}))[9]; |
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| 244 | $mtime_sth->execute($mp3->{FILENAME}); |
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| 245 | my $records = $mtime_sth->fetchall_arrayref; |
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| 246 | |
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| 247 | warn "Multiple records for $$mp3{FILENAME}\n" if @$records > 1; |
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| 248 | |
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| 249 | if (@$records == 0) { |
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| 250 | # we are adding a record |
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| 251 | $insert_sth->execute(map { $mp3->{$$_[0]} } @COLUMNS); |
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| 252 | $status_callback->(A => $$mp3{FILENAME}); |
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| 253 | $count++; |
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| 254 | } elsif ($mp3->{mtime} > $$records[0][0]) { |
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| 255 | # the mp3 file is newer than its record |
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| 256 | $update_sth->execute((map { $mp3->{$$_[0]} } @COLUMNS), $mp3->{FILENAME}); |
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| 257 | $status_callback->(U => $$mp3{FILENAME}); |
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| 258 | $count++; |
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| 259 | } |
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| 260 | } |
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| 261 | |
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| 262 | # SQLite specific code: |
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| 263 | # as a workaround for the 'closing dbh with active staement handles warning |
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| 264 | # (see http://rt.cpan.org/Ticket/Display.html?id=9643#txn-120724) |
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| 265 | foreach ($mtime_sth, $insert_sth, $update_sth) { |
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| 266 | $_->{RaiseError} = 0; # don't die on error |
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| 267 | $_->{PrintError} = 0; # ...and don't even say anything |
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| 268 | $_->{Active} = 1; |
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| 269 | $_->finish; |
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| 270 | } |
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| 271 | |
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| 272 | return $count; |
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| 273 | } |
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| 274 | |
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[30] | 275 | =head2 update_db |
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[29] | 276 | |
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[30] | 277 | my $count = $finder->update_db($db_filename, \@dirs); |
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[29] | 278 | |
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[30] | 279 | Searches for all mp3 files in the directories named by C<@dirs> |
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| 280 | using L<MP3::Find::Filesystem>, and adds or updates the ID3 info |
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| 281 | from those files to the database. If a file already has a record |
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| 282 | in the database, then it will only be updated if it has been modified |
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| 283 | since the last time C<update_db> was run. |
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| 284 | |
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| 285 | =cut |
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| 286 | |
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[10] | 287 | sub update_db { |
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| 288 | my $self = shift; |
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[19] | 289 | my $db_file = shift or croak "Need the name of the database to update"; |
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[10] | 290 | my $dirs = shift; |
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| 291 | |
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[19] | 292 | my $status_callback = $self->{status_callback} || $DEFAULT_STATUS_CALLBACK; |
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| 293 | |
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[10] | 294 | my @dirs = ref $dirs eq 'ARRAY' ? @$dirs : ($dirs); |
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| 295 | |
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| 296 | my $dbh = DBI->connect("dbi:SQLite:dbname=$db_file", '', '', {RaiseError => 1}); |
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| 297 | my $mtime_sth = $dbh->prepare('SELECT mtime FROM mp3 WHERE FILENAME = ?'); |
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| 298 | my $insert_sth = $dbh->prepare( |
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| 299 | 'INSERT INTO mp3 (' . |
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| 300 | join(',', map { $$_[0] } @COLUMNS) . |
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| 301 | ') VALUES (' . |
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| 302 | join(',', map { '?' } @COLUMNS) . |
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| 303 | ')' |
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| 304 | ); |
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| 305 | my $update_sth = $dbh->prepare( |
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| 306 | 'UPDATE mp3 SET ' . |
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| 307 | join(',', map { "$$_[0] = ?" } @COLUMNS) . |
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| 308 | ' WHERE FILENAME = ?' |
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| 309 | ); |
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| 310 | |
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| 311 | # the number of records added or updated |
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| 312 | my $count = 0; |
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| 313 | |
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| 314 | # look for mp3s using the filesystem backend |
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| 315 | require MP3::Find::Filesystem; |
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| 316 | my $finder = MP3::Find::Filesystem->new; |
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| 317 | for my $mp3 ($finder->find_mp3s(dir => \@dirs, no_format => 1)) { |
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| 318 | # see if the file has been modified since it was first put into the db |
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| 319 | $mp3->{mtime} = (stat($mp3->{FILENAME}))[9]; |
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| 320 | $mtime_sth->execute($mp3->{FILENAME}); |
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| 321 | my $records = $mtime_sth->fetchall_arrayref; |
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| 322 | |
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| 323 | warn "Multiple records for $$mp3{FILENAME}\n" if @$records > 1; |
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| 324 | |
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| 325 | if (@$records == 0) { |
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| 326 | $insert_sth->execute(map { $mp3->{$$_[0]} } @COLUMNS); |
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[19] | 327 | $status_callback->(A => $$mp3{FILENAME}); |
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[10] | 328 | $count++; |
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| 329 | } elsif ($mp3->{mtime} > $$records[0][0]) { |
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| 330 | # the mp3 file is newer than its record |
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| 331 | $update_sth->execute((map { $mp3->{$$_[0]} } @COLUMNS), $mp3->{FILENAME}); |
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[19] | 332 | $status_callback->(U => $$mp3{FILENAME}); |
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[10] | 333 | $count++; |
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| 334 | } |
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| 335 | } |
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| 336 | |
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| 337 | # as a workaround for the 'closing dbh with active staement handles warning |
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| 338 | # (see http://rt.cpan.org/Ticket/Display.html?id=9643#txn-120724) |
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| 339 | foreach ($mtime_sth, $insert_sth, $update_sth) { |
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[12] | 340 | $_->{RaiseError} = 0; # don't die on error |
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[19] | 341 | $_->{PrintError} = 0; # ...and don't even say anything |
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[10] | 342 | $_->{Active} = 1; |
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| 343 | $_->finish; |
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| 344 | } |
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| 345 | |
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| 346 | return $count; |
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| 347 | } |
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| 348 | |
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[30] | 349 | =head2 sync_db |
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| 350 | |
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| 351 | my $count = $finder->sync_db($db_filename); |
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| 352 | |
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| 353 | Removes entries from the database that refer to files that no longer |
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| 354 | exist in the filesystem. Returns the count of how many records were |
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| 355 | removed. |
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| 356 | |
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| 357 | =cut |
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| 358 | |
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[29] | 359 | # TODO: use DSNs instead of SQLite db names |
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[13] | 360 | sub sync_db { |
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| 361 | my $self = shift; |
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| 362 | my $db_file = shift or croak "Need the name of the databse to sync"; |
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[19] | 363 | |
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| 364 | my $status_callback = $self->{status_callback} || $DEFAULT_STATUS_CALLBACK; |
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| 365 | |
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[13] | 366 | my $dbh = DBI->connect("dbi:SQLite:dbname=$db_file", '', '', {RaiseError => 1}); |
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| 367 | my $select_sth = $dbh->prepare('SELECT FILENAME FROM mp3'); |
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| 368 | my $delete_sth = $dbh->prepare('DELETE FROM mp3 WHERE FILENAME = ?'); |
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| 369 | |
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| 370 | # the number of records removed |
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| 371 | my $count = 0; |
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| 372 | |
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| 373 | $select_sth->execute; |
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| 374 | while (my ($filename) = $select_sth->fetchrow_array) { |
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| 375 | unless (-e $filename) { |
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| 376 | $delete_sth->execute($filename); |
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[19] | 377 | $status_callback->(D => $filename); |
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[13] | 378 | $count++; |
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| 379 | } |
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| 380 | } |
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| 381 | |
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| 382 | return $count; |
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| 383 | } |
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| 384 | |
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[30] | 385 | =head2 destroy_db |
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| 386 | |
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| 387 | $finder->destroy_db($db_filename); |
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| 388 | |
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| 389 | Permanantly removes the database. |
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| 390 | |
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| 391 | =cut |
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| 392 | |
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[29] | 393 | # TODO: use DSNs instead of SQLite db names (this might get funky) |
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[10] | 394 | sub destroy_db { |
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| 395 | my $self = shift; |
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| 396 | my $db_file = shift or croak "Need the name of a database to destory"; |
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| 397 | unlink $db_file; |
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| 398 | } |
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| 399 | |
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[3] | 400 | |
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[30] | 401 | # TODO: use DSNs instead of SQLite db names |
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| 402 | sub search { |
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| 403 | my $self = shift; |
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| 404 | my ($query, $dirs, $sort, $options) = @_; |
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[3] | 405 | |
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[30] | 406 | croak 'Need a database name to search (set "db_file" in the call to find_mp3s)' unless $$options{db_file}; |
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[10] | 407 | |
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[30] | 408 | my $dbh = DBI->connect("dbi:SQLite:dbname=$$options{db_file}", '', '', {RaiseError => 1}); |
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[10] | 409 | |
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[30] | 410 | # use the 'LIKE' operator to ignore case |
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| 411 | my $op = $$options{ignore_case} ? 'LIKE' : '='; |
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[10] | 412 | |
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[30] | 413 | # add the SQL '%' wildcard to match substrings |
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| 414 | unless ($$options{exact_match}) { |
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| 415 | for my $value (values %$query) { |
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| 416 | $value = [ map { "%$_%" } @$value ]; |
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| 417 | } |
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| 418 | } |
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[3] | 419 | |
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[30] | 420 | my ($where, @bind) = $sql->where( |
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| 421 | { map { $_ => { $op => $query->{$_} } } keys %$query }, |
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| 422 | ( @$sort ? [ map { uc } @$sort ] : () ), |
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[3] | 423 | ); |
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[30] | 424 | |
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| 425 | my $select = "SELECT * FROM mp3 $where"; |
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| 426 | |
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| 427 | my $sth = $dbh->prepare($select); |
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| 428 | $sth->execute(@bind); |
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| 429 | |
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| 430 | my @results; |
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| 431 | while (my $row = $sth->fetchrow_hashref) { |
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| 432 | push @results, $row; |
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[20] | 433 | } |
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[30] | 434 | |
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| 435 | return @results; |
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| 436 | } |
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[20] | 437 | |
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[30] | 438 | # module return |
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| 439 | 1; |
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[20] | 440 | |
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[3] | 441 | =head1 TODO |
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| 442 | |
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| 443 | Database maintanence routines (e.g. clear out old entries) |
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| 444 | |
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[10] | 445 | Allow the passing of a DSN or an already created C<$dbh> instead |
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[13] | 446 | of a SQLite database filename; or write driver classes to handle |
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| 447 | database dependent tasks (create_db/destroy_db). |
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[10] | 448 | |
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[3] | 449 | =head1 SEE ALSO |
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| 450 | |
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[10] | 451 | L<MP3::Find>, L<MP3::Find::Filesystem>, L<mp3db> |
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[3] | 452 | |
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| 453 | =head1 AUTHOR |
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| 454 | |
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| 455 | Peter Eichman <peichman@cpan.org> |
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| 456 | |
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[29] | 457 | =head1 THANKS |
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| 458 | |
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| 459 | Thanks to Matt Dietrich for suggesting having an option to just |
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| 460 | update specific files instead of doing a (longer) full search. |
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| 461 | |
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[3] | 462 | =head1 COPYRIGHT AND LICENSE |
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| 463 | |
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| 464 | Copyright (c) 2006 by Peter Eichman. All rights reserved. |
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| 465 | |
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| 466 | This program is free software; you can redistribute it and/or |
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| 467 | modify it under the same terms as Perl itself. |
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| 468 | |
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| 469 | =cut |
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