package Plagger::Plugin::Publish::IMAP;
use strict;
use base qw( Plagger::Plugin );

use DateTime;
use DateTime::Format::Mail;
use Encode qw/ from_to encode/;
use Encode::MIME::Header;
use MIME::Lite;
use IO::File;
use Mail::IMAPClient;
use Digest::MD5 qw/ md5_hex /;

sub register {
    my($self, $context) = @_;
    $self->{version} = '0.1';
    $context->register_hook(
        $self,
        'plugin.init'      => \&initialize,
        'publish.entry'    => \&store_entry,
        'publish.finalize' => \&finalize,
    );
}

sub rule_hook { 'publish.entry' }

sub initialize {
    my($self, $context, $args) = @_;
    my $cfg = $self->conf;
    $self->{imap} = Mail::IMAPClient->new(
        User     => $cfg->{username},
        Password => $cfg->{password},
        Server   => $cfg->{host} || 'localhost',
        Port     => $cfg->{port} || 143,
      )
      or die $context->log(error => "Cannot connect; $@");
    $context->log(debug => "Connected IMAP-SERVER (" . $cfg->{host} . ")");
    if ($cfg->{folder} && !$self->{imap}->exists($cfg->{folder})) {
        $self->{imap}->create($cfg->{folder})
          or die $context->log(error => "Could not create $cfg->{folder}: $@");
        $context->log(info => "Create new folder ($cfg->{folder})");
    }
    if (!$cfg->{mailfrom}) {
        $cfg->{mailfrom} = 'plagger';
    }
}

sub finalize {
    my($self, $context, $args) = @_;
    my $cfg = $self->{conf};
    $self->{imap}->disconnect();
    if (my $msg_count = $self->{msg}) {
        $context->log(info => "Store $msg_count Message(s)");
    }
    $context->log(debug => "Disconnected IMAP-SERVER (" . $cfg->{host} . ")");
}

sub store_entry {
    my($self, $context, $args) = @_;
    my $cfg = $self->conf;
    my $msg;
    my $entry      = $args->{entry};
    my $feed_title = $args->{feed}->title;
    $feed_title =~ tr/,//d;
    my $subject = $entry->title || '(no-title)';
    my $body =
      $self->templatize('mail.tt',
        { entry => $args->{entry}, feed => $args->{feed} });
    my $now = Plagger::Date->now(timezone => $context->conf->{timezone});
    $msg = MIME::Lite->new(
        Date    => $now->format('Mail'),
        From    => encode('MIME-Header', qq("$feed_title" <$cfg->{mailfrom}>)),
        To      => $cfg->{mailto},
        Subject => encode('MIME-Header', $subject),
        Type    => 'multipart/related',
    );
    $body = encode("utf-8", $body);
    $msg->attach(
        Type     => 'text/html; charset=utf-8',
        Data     => $body,
        Encoding => 'quoted-printable',
    );
    $msg->add('X-Tags', encode('MIME-Header', join(' ', @{ $entry->tags })));
    my $xmailer =
      "MIME::Lite (Publish::Maildir Ver.$self->{version} in plagger)";
    $msg->replace('X-Mailer', $xmailer);
    $msg->add('In-Reply-To', "<" . md5_hex($entry->id_safe) . '@localhost>');
    store_maildir($self, $context, $msg->as_string());
    $self->{msg} += 1;
}

sub store_maildir {
    my($self, $context, $msg) = @_;
    my $folder = $self->conf->{folder} || 'INBOX';
    my $uid = $self->{imap}->append_string($folder, $msg)
      or die $context->log(error => "Could not append: $@");
}

1;

=head1 NAME

Plagger::Plugin::Publish::IMAP - Transmits IMAP server

=head1 SYNOPSIS

  - module: Publish::IMAP
    config:
      username: user
      password: passwd
      folder: plagger
      mailfrom: plagger@localhost

=head1 DESCRIPTION

This plug-in changes an entry into e-mail, and transmits it to an IMAP server.

=head1 AUTHOR

Nobuhito Sato

=head1 SEE ALSO

L<Plagger>

=cut