docs: Add page describing how to use events (#879)

* create events.rst

* docs: stuff

* docs: stuff

* docs: stuff

* docs: stuff

* docs: stuff

* docs: socket create and on command

* docs: socket create and on command

* docs: socket create and on command

* docs: socket create and on command

* docs: discord event

* refactor: discord events

* refactor: discord events

* fix: attempt to fix links

* docs: stuff

* Update events.rst

* Update docs/events.rst

Co-authored-by: Toricane <73972068+Toricane@users.noreply.github.com>

Co-authored-by: Toricane <73972068+Toricane@users.noreply.github.com>

Author: EepyElvyra

docs/events.rst

@@ -0,0 +1,180 @@
+Event Documentation
+====================
+
+You all probably already know that there are several events, internal and from Discord, that you can receive with your
+bot. This page will lead you through all dispatched internal events and a few from Discord.
+
+
+
+How to listen for events
+************************
+
+Generally, you can listen to an event like this:
+
+.. code-block:: python
+
+    import interactions
+
+    bot = interactions.Client(...)
+
+    # possibility 1
+    @bot.event
+    async def on_(...):
+        ...  # do smth
+
+    # possibility 2
+    @bot.event(name="on_")
+    async def you_are_free_to_name_this_as_you_want(...):
+        ... # do smth
+
+    bot.start()
+
+
+```` represents the Discord event name - but lowercase and any spaces replaced with ``_``.
+
+For example:
+
+* ``READY`` -> ``on_ready``
+* ``GUILD MEMBER ADD`` -> ``on_guild_member_add``
+
+``(...)`` represents the different arguments a function takes. Those arguments differ per event.
+
+
+
+Now, let us have a look at different events and how they work, starting with internal events.
+
+Internal Events
+****************
+
+All events mentioned in this section have the exact naming as they must be put into the function.
+
+There are several different internal events:
+
+    - ``raw_socket_create``
+    - ``on_interaction``
+    - ``on_command``
+    - ``on_component``
+    - ``on_autocomplete``
+    - ``on_modal``
+
+Lets now have a look at those events in detail:
+
+Event: ``raw_socket_create``
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+This event fires on any event sent by Discord, including ``Typing Start``  and ``Voice State Update``.
+``Hello``, ``Resumed``, ``Reconnect`` and ``Invalid Session`` still will not be dispatched.
+
+The function handling the event should take in one argument, the type of this argument is a ``dict``.
+
+The value of the argument will be the *raw* data sent from Discord, so it is not recommended to use that event
+as long as you don't absolutely need it.
+
+
+Event: ``on_interaction``
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+This event fires on any interaction (commands, components, autocomplete and modals).
+
+The function needs one argument. It will have the type ``CommandContext`` or ``ComponentContext``.
+
+Because you will have to check for everything, from the ``InteractionType`` to any data inside the context, we do not
+recommend using this event unless you have experience with it.
+
+
+Event: ``on_command``
+^^^^^^^^^^^^^^^^^^^^^
+This event fires on any Application Command (slash command + context menu command) used.
+
+The function takes in one argument of the type ``CommandContext``.
+
+Using this event, you will have to manually check everything, from name to whether the used commands have sub commands,
+options or anything else - everything will be in the raw context and you will have to search for it
+
+
+Event: ``on_component``
+^^^^^^^^^^^^^^^^^^^^^^
+This event fires on any Component used (for now, those are Buttons and Select Menus).
+
+The function takes in one argument of the type ``ComponentContext``.
+
+Like ``on_command``, you will have to manually check for everything, i.e for custom id and component type.
+Also, you will have to look through the argument to find the selected choices, if you have a select menu.
+
+
+Event: ``on_autocomplete``
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+This event fires on any autocomplete triggered.
+
+The function takes in one argument of the type ``CommandContext``.
+
+As already in the events above, you will have to get the important values yourself. Those values are here the
+autocompleted option and the user input.
+
+
+Event: ``on_modal``
+^^^^^^^^^^^^^^^^^^^
+This event fires on every modal that is submitted.
+
+The function takes in one argument of the type ``CommandContext``.
+
+You will have to get all values yourself and check what modal was used when using this event.
+
+
+Additionally, if you struggle with getting the values, you can check
+:ref:`how it is handled internally `.
+
+
+After this, let us look at events from the Discord API.
+
+Discord API Events
+******************
+
+Events in this section do not match the name needed to put into the function. Please check
+:ref:`above ` for how to get the correct name.
+
+
+There are a lot of events dispatched by the Discord API. All of those can be found `here`_.
+
+The events ``HELLO``, ``RESUMED``, ``RECONNECT``, ``INVALID SESSION`` and ``TYPING START`` are not dispatched by the library.
+
+``TYPING START`` will be included in the raw socket create event. You can
+also listen for it if you choose to subclass the WebSocketClient
+
+The event ``VOICE STATE UPDATE`` can be only received with the voice :ref:`Extension `.
+
+
+Let's now have a look at a few events:
+
+Event: ``READY``
+^^^^^^^^^^^^^^^^
+This event fires whenever ``READY`` is dispatched by Discord. This happens when connecting to the web socket server.
+
+This function takes no arguments.
+
+.. attention::
+    Due to the bot reconnecting during runtime, ``on_ready`` will be dispatched multiple times. If you rely on
+    ``on_ready`` to do certain things once, check against a global variable as shown below:
+
+    .. code-block:: python
+
+        _ready: bool = False
+        bot = interactions.Client(...)
+
+        @bot.event
+        async def on_ready():
+            global _ready
+            if not _ready:
+                ... # do stuff
+                _ready = True
+
+
+Events: ``GUILD MEMBER UPDATE`` and ``GUILD MEMBER ADD``
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+These events fire whenever a member joins a guild or a member of a guild gets modified.
+
+The function takes in one argument of the type ``GuildMember``.
+
+The argument has the same methods as a normal ``Member`` object, except the methods *do not take in a guild id*.
+Please keep that in mind when using this event.
+
+
+.. _here: https://Discord.com/developers/docs/topics/gateway#commands-and-events-gateway-events

docs/index.rst

@@ -50,6 +50,7 @@ Please look at our pages below to find out where to go.
 
    quickstart.rst
    api.rst
+   events.rst
    faq.rst
    migration.rst