======
Basics
======

First step is to include the Composer autoload file and `import <https://www.php.net/manual/en/language.namespaces.importing.php>`_ any required classes.

.. code:: php

   <?php

   use Discord\Discord;
   use Discord\WebSockets\Intents;
   use Discord\WebSockets\Event;

   include __DIR__.'/vendor/autoload.php';

The Discord instance can be set up with an array of options. All are optional except for token:

.. code:: php

   $discord = new Discord([
       'token' => 'Your-Token-Here',
       'intents' => [
           Intents::GUILDS, Intents::GUILD_BANS, // ...
       ],
       // or
       'intents' => 12345,
       // or
       'intents' => Intents::getDefaultIntents() | Intents::GUILD_MEMBERS, // default intents as well as guild members
       'loadAllMembers' => false,
       'storeMessages' => false,
       'retrieveBans' => false,
       'pmChannels' => false,
       'disabledEvents' => [
           Event::MESSAGE_CREATE, Event::MESSAGE_DELETE, // ...
       ],
       'loop' => \React\EventLoop\Factory::create(),
       'logger' => new \Monolog\Logger('New logger'),
       'dnsConfig' => '1.1.1.1',
       'shardId' => 0,
       'shardCount' => 5,
   ]);

``token`` is your Discord token. **Required**.

``intents`` can be an array of valid intents *or* an integer representing the intents. Default is all intents minus any privileged intents. At the moment this means all intents minus ``GUILD_MEMBERS`` and ``GUILD_PRESENCES``. To enable these intents you must first enable them in your Discord developer portal.

``loadAllMembers`` is a boolean whether all members should be fetched and stored on bot start. Loading members takes a while to retrieve from Discord and store, so default is false. This requires the ``GUILD_MEMBERS`` intent to be enabled in DiscordPHP. See above for more details.

``storeMessages`` is a boolean whether messages received and sent should be stored. Default is false.

``retrieveBans`` is a boolean whether bans should be retrieved on bot load. Default is false.

``pmChannels`` is a boolean whether PM channels should be stored on bot load. Default is false.

``disabledEvents`` is an array of events that will be disabled. By default all events are enabled.

``loop`` is an instance of a ReactPHP event loop that can be provided to the client rather than creating a new loop. Useful if you want to use other React components. By default, a new loop is created.

``logger`` is an instance of a logger that implements ``LoggerInterface``. By default, a new Monolog logger with log level DEBUG is created to print to stdout.

``dnsConfig`` is an instace of ``Config`` or a string of name server address. By default system setting is used and fall back to 8.8.8.8 when system configuration is not found. Currently only used for VoiceClient.

----

The following options should only be used by large bots that require sharding. If you plan to use sharding, `read up <https://discord.com/developers/docs/topics/gateway#sharding>`_ on how Discord implements it.

``shardId`` is the ID of the bot shard.

``shardCount`` is the number of shards that you are using.

----

Gateway events should be registered inside the ``ready`` event, which is emitted once when the bot first starts and has connected to the gateway.

To register an event we use the ``$discord->on(...)`` function, which registers a handler. A list of events is available `here <https://github.com/discord-php/DiscordPHP/blob/master/src/Discord/WebSockets/Event.php#L30-L75>`_. They are described in more detail in further sections of the documentation. All events take a callback which is called when the event is triggered, and the callback is called with an object representing the content of the event and an instance of the ``Discord`` client.

.. code:: php

   $discord->on('ready', function (Discord $discord) {

       $discord->on(Event::MESSAGE_CREATE, function (Message $message, Discord $discord) {
           // ... handle message sent
       });

   });


Finally, the event loop needs to be started. Treat this as an infinite loop.

.. code:: php

   $discord->run();

If you want to stop the bot you can run:

.. code:: php

   $discord->close();

If you want to stop the bot without stopping the event loop, the close function takes a boolean:

.. code:: php

   $discord->close(false);
