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=begin pod

=head1 Basic tutorial

=head2 Client creation

The first thing to do is create a C<Matrix::Client> pointing to
the homeserver, and C<login> into it.

    my Matrix::Client $client .= new:
        :home-server<https://matrix.org>;
    $client.login($username, $password);
    say $client.access-token;

In case you have an access-token, you can pass it as a parameter
to C<new>. In this case is not necessary to call C<login>.

    my Matrix::Client $client .= new:
        :home-server<https://matrix.org>,
        :access-token($access-token);

    say $client.whoami;  # @yourusername:home-server

=head2 Syncing

Calling sync will return a C<Matrix::Response::Sync> that abstract the
response from the server. This structure should have all the information
from the server like:

=item presence
=item joined rooms
=item room invites

Beware that the C<.next-batch> will have the C<:since> argument
that is passed to the next C<sync>. If not provided, the response will have
repeated data.

    my $response = $client.sync;
    my $since = $response.next-batch;

    # print all messages
    for $response.joined-rooms -> $room {
        for $room.timeline.events
                 .grep(*.type eq 'm.room.message') -> $msg {
            $msg.content<body>.say;
        }
    }

    # Sync again with the since parameter
    my $new-response = $client.sync(:$since);

There's a C<filter> argument that you could use to filter the response. To
see available parameters to the filter you can go
L<here|https://matrix.org/docs/spec/client_server/r0.3.0.html#post-matrix-client-r0-user-userid-filter>.

    # limit the messages per room to 1

    # Passing a hash.
    my $response = $client.sync(
        sync-filter => { room => timeline => limit => 1}
    );

    # Passing a json as parameter
    my $json-response = $client.sync(
        sync-filter => '{"room":{"timeline":{ "limit": 1}}}'
    );

As for now, you can't send a filter_id of an already created filter.

=head2 Sending events

There's two ways to send events to a channel. The only event supported
is C<m.room.message>


=item C<.send($room-id, $message, :$type)> from C<Matrix::Client>
=item C<.send($message, :$type)> from C<Matrix::Client::Room>

Here's an example of the two:

    my $room = $client.joined-rooms.first;
    $client.send($room.id, 'Hello');
    $room.send('hello');

=head2 Async loop

C<Matrix::Client> supports an async loop that can replace a C<loop { $client.sync; … }>
since it's a common thing to do. It starts a new thread that runs that loop
sending all the events through a C<Supplier>.

    my $supply = $client.run();

    react {
        whenever $supply -> $s {
            when $s ~~ Matrix::Response::InviteInfo {
                say "Got an invite from {$s.room-id}";
            }
            when $s ~~ Matrix::Response::StateEvent {
                say "Got a room event from {$s.room-id}";
            }
        }
    }

=end pod