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package App::ImapNotify::ImapClient;
use v5.24;
use strict;
use warnings;
use App::ImapNotify::Socket::SSL;
use autodie;
use Carp;
use Data::Dumper;
use Function::Parameters;
use Log::Any qw($log);
use Time::HiRes;
use Time::Out qw(timeout);
=head1 NAME
App::ImapNotify::ImapClient - ShortDesc
=head1 SYNOPSIS
use App::ImapNotify::ImapClient;
# synopsis...
=head1 DESCRIPTION
# longer description...
=head1 INTERFACE
=head1 DEPENDENCIES
=head1 SEE ALSO
L<App::ImapNotify>
=cut
method new($class: $config, $deps = {}) {
$deps->{sock} //= App::ImapNotify::Socket::SSL->new($config->@{qw(host port)});
$config->{keepalive_timeout} //= 300;
return $class->new_no_defaults($config, $deps);
}
method new_no_defaults($class: $config, $deps = {}) {
my $self = {};
bless $self, $class;
$self->{log_id} = $config->{log_id};
$self->{keepalive_timeout} = $config->{keepalive_timeout};
$self->{line_buffer} = [];
$self->{deps} = $deps;
$self->_connect();
$self->_login($config->@{qw(username password)});
return $self;
}
method _connect() {
# wait for server greeting
my $response = $self->readline_block();
if ($response !~ m/^\* OK (.*)/) {
confess "Invalid server greeting. Got reply: $response";
}
$self->{capabilities} = $1;
}
method _login($username, $password) {
if ($self->{capabilities} !~ m/\bAUTH=PLAIN\b/) {
croak "Server doesn't support AUTH=PLAIN";
}
my $response = $self->send_command("login $username $password");
confess "No capabilities found in response: '".$response->[0]."'" unless $response->[0] =~ m/^OK \[(.*)\].*$/;
$self->{capabilities} = $1;
if ($self->{capabilities} !~ m/\bNOTIFY\b/) {
croak "Server doesn't support NOTIFY";
}
}
method select($mailbox) {
# TODO: seems like select is needed to be able to access newly added UIDs. maybe find a better fix than removing this optimization or look in the standard what's going on here?
#if ($self->{current_mailbox} ne $mailbox) {
$self->send_command("select $mailbox");
# $self->{current_mailbox} = $mailbox;
#}
}
method send_command($command) {
state $counter = 0;
my $id = "CMD-".$counter++;
chomp($command);
#print "Sending $command\n";
#sleep (5) if $command eq "noop";
$self->writeline("$id $command\r\n");
my @lines;
while (my $line = $self->readline_block()) {
# TODO: this is probably not correct, but seems to be enough for now. a correct way should probably check that the fetch reply actually corresponds to the fetch command. probably best to check if the UID is the same.
if ($command =~ /^uid fetch /i and $line =~ /^(\* \d+ FETCH .*\r\n)/) {
push @lines, $self->handle_fetch($1)->@*;
next;
} elsif ($line =~/^(\* \d+ FETCH .*\r\n)/) {
push @lines, $line, $self->handle_fetch($1)->@*;
next;
}
if ($line =~ m/^$id (OK .*\r\n)$/) {
push @lines, $1;
return \@lines;
} elsif ($line =~ /^$id /) {
croak "Command '$command' failed. Got reply: $line";
}
if ($line =~ /^(.*\r\n)$/) {
push @lines, $1;
}
}
}
method get_uids($mailbox) {
$self->select($mailbox);
my $response = $self->send_command("UID FETCH 1:* (UID)");
pop @$response;
@$response = map {s/^.* FETCH \(UID ([0-9]+)\)$/$1/r} @$response;
return $response;
}
method handle_fetch($first_line) {
if ($first_line =~ m/^\* \d+ FETCH \(.* \{(?<bytes>\d+)\}\r\n$/) {
my $bytes = $+{bytes};
my $read = 0;
my @lines = ();
while ($read < $bytes) {
my $line = $self->readline_block();
$read += length($line);
push @lines, $line;
#print "Got total of $read bytes. data = --'$data'--";
}
my $line = $self->readline_block();
if ($line ne ")\r\n") {
confess "Expected closing brace after data. Got: '$line'";
}
push @lines, $line;
return \@lines;
} else {
confess "First line doesn't match FETCH pattern. Line is: '$first_line'";
}
}
method writeline($line) {
$log->tracef("%s >> %s", $self->{log_id}, $line =~ s/\r\n$//r);
return $self->{deps}->{sock}->writeline($line);
}
method readline_block() {
if ($self->{line_buffer}->@* > 0) {
return $self->_readline_buffer();
}
my $response = $self->{deps}->{sock}->readline();
if (defined $response) {
$log->tracef("%s << %s", $self->{log_id}, $response =~ s/\r\n$//r);
} else {
$log->tracef("%s input stream closed (read undef)", $self->{log_id});
}
return $response;
}
method readline_timeout() {
my $timeout = $self->{keepalive_timeout};
while (1) {
my $ret = timeout $timeout => sub {
return $self->readline_block();
};
if ($@) {
$log->debug("Keepalive timeout reached. Sending noop");
my @noop_reply = $self->send_command("noop")->@*;
#print Dumper(\@noop_reply);
if (@noop_reply > 1) {
# last line is the reply to NOOP (send_command checks for
# that). anything else is data that likely got in between the
# timeout expiring and noop reply. it should likely be passed
# back up to our caller
pop @noop_reply;
push $self->{line_buffer}->@*, @noop_reply;
return $self->_readline_buffer();
}
} else {
return $ret;
}
}
}
method _readline_buffer() {
return shift $self->{line_buffer}->@*;
}
1;
__END__
|
