gistfile1.pl

use strict;
use warnings;

use Net::Twitter;
use Path::Class;
use Array::Diff;
use Config::Pit;
use Getopt::Long;
use LWP::Simple;
use File::Temp;
use File::Spec;
use Data::Dumper;

my $AppName = "follow-management";
my $FileName;
my $oauth_pit;
my $consumer_pit;
GetOptions('db=s' => \$FileName, 'oauth=s' => \$oauth_pit, 'consumer=s' => \$consumer_pit);

my $oauth_config = pit_get($oauth_pit, require => {
    "access_token" => "YOUR_ACCESS_TOKEN",
    "access_token_secret" => "YOUR_TOKEN_SECRET",
}); # TODO: It have better to get access_token API.
my $consumer_config = pit_get($consumer_pit, require => {
    "consumer_key" => "YOUR_CONSUMER_KEY",
    "consumer_secret" => "YOUR_CONSUMER_SECRET",
});
my $twitter = Net::Twitter->new(
    traits => [qw/API::REST OAuth WrapError/],
    consumer_key => $consumer_config->{consumer_key},
    consumer_secret => $consumer_config->{consumer_secret},
    ssl => 1,
);
$twitter->access_token($oauth_config->{access_token});
$twitter->access_token_secret($oauth_config->{access_token_secret});
my $file = Path::Class::File->new($FileName);

unless ( -e $file ) {
    save_file ( fetch_twitter() );
    growl({ t => $AppName, m => 'imported' });
} else {
    my $old = read_file();
    my $new = fetch_twitter();

    my $diff = Array::Diff->diff( $old, $new );

    notify( $diff->added, "%s (%s) follow you.\n" );
    notify( $diff->deleted, "%s (%s) remove you.\n" );

    save_file ( $new );
}


sub fetch_twitter {
    my $cursor = -1;
    my @ids;
    for ( my $cursor = -1, my $r; $cursor; $cursor = $r->{next_cursor}) {
        $r = $twitter->followers_ids({ cursor => $cursor });
        unless ($r) {
            growl({ t => $AppName, m => 'fetch error' }, 1);
            exit;
        }
        push @ids, @{ $r->{ids} };
    }

    \@ids;
}

sub read_file {
    my $fh = $file->openr;

    my @old_ids;
    while (<$fh>) {
        s/[\r\n]+//g;
        push @old_ids, split(',', $_);
    }
    $fh->close;

    \@old_ids;
}

sub save_file {
    my $ids = shift;
    my $fh = $file->openw;
    print $fh join(',', @$ids);
    $fh->close;
}

sub notify {
    my ($arr, $format) = @_;
    my $tmpdir = File::Temp::tempdir( CLEANUP => 1 );

    for my $id (@$arr) {
        my $user = $twitter->show_user($id);
        next unless $user;
        my $desc =  sprintf $format, $user->{screen_name}, $user->{name};
        my $url = $user->{profile_image_url};
        my $image = File::Spec->catfile( $tmpdir, (split(/\//, $url))[-1] );
        LWP::Simple::mirror( $url, $image );
        growl({ t => $AppName, m => $desc }, $image, 1 );
    }
}

sub growl {
    my $options = shift;
    my $image = shift;
    my $sticky = shift;
    my $cmd;
    while ( my ( $k, $v ) = each ( %$options ) ) {
        $cmd .= sprintf(" -%s '%s'", $k, $v);
    }
    $cmd .= ' -s' if $sticky;
    $cmd .= sprintf(' --image %s', $image) if $image;
    system sprintf("/usr/local/bin/growlnotify %s", $cmd);
}