Module: Discordrb::EventContainer

Includes:
Events
Included in:
Bot
Defined in:
lib/discordrb/container.rb

Overview

This module provides the functionality required for events and awaits. It is separated from the Bot class so users can make their own container modules and include them.

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Events

matches_all

Class Method Details

.class_from_string(str) ⇒ Class

Utility method to return a class object from a string of its name. Mostly useful for internal stuff

Parameters:

  • str (String) —

    The name of the class

Returns:

  • (Class) —

    the class



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# File 'lib/discordrb/container.rb', line 401

def self.class_from_string(str)
  str.split('::').inject(Object) do |mod, class_name|
    mod.const_get(class_name)
  end
end

.event_class(handler_class) ⇒ Class?

Returns the event class for a handler class type

Parameters:

  • handler_class (Class) —

    The handler type

Returns:

  • (Class, nil) —

    the event type, or nil if the handler_class isn't a handler class (i. e. ends with Handler)

See Also:

  • #handler_class


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# File 'lib/discordrb/container.rb', line 391

def self.event_class(handler_class)
  class_name = handler_class.to_s
  return nil unless class_name.end_with? 'Handler'

  EventContainer.class_from_string(class_name[0..-8])
end

.handler_class(event_class) ⇒ Class

Returns the handler class for an event class type

Parameters:

  • event_class (Class) —

    The event type

Returns:

  • (Class) —

    the handler type

See Also:

  • #event_class


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# File 'lib/discordrb/container.rb', line 383

def self.handler_class(event_class)
  class_from_string(event_class.to_s + 'Handler')
end

Instance Method Details

#add_handler(handler) ⇒ Object Also known as: <<

Adds an event handler to this container. Usually, it's more expressive to just use one of the shorthand adder methods like #message, but if you want to create one manually you can use this.

Parameters:



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# File 'lib/discordrb/container.rb', line 360

def add_handler(handler)
  clazz = EventContainer.event_class(handler.class)
  @event_handlers ||= {}
  @event_handlers[clazz] << handler
end

#await(attributes = {}) {|event| ... } ⇒ AwaitEventHandler

This event is raised when an Await is triggered. It provides an easy way to execute code on an await without having to rely on the await's block.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :key (Symbol) —

    Exactly matches the await's key.

  • :type (Class) —

    Exactly matches the event's type.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

  • event (AwaitEvent) —

    The event that was raised.

Returns:



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# File 'lib/discordrb/container.rb', line 317

def await(attributes = {}, &block)
  register_event(AwaitEvent, attributes, block)
end

#channel_create(attributes = {}) {|event| ... } ⇒ ChannelCreateEventHandler

This event is raised when a channel is created.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :type (Integer) —

    Matches the type of channel that is being created (0: text, 1: private, 2: voice, 3: group)

  • :name (String) —

    Matches the name of the created channel.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 159

def channel_create(attributes = {}, &block)
  register_event(ChannelCreateEvent, attributes, block)
end

#channel_delete(attributes = {}) {|event| ... } ⇒ ChannelDeleteEventHandler

This event is raised when a channel is deleted.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :type (Integer) —

    Matches the type of channel that is being deleted (0: text, 1: private, 2: voice, 3: group).

  • :name (String) —

    Matches the name of the deleted channel.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 181

def channel_delete(attributes = {}, &block)
  register_event(ChannelDeleteEvent, attributes, block)
end

#channel_recipient_add(attributes = {}) {|event| ... } ⇒ ChannelRecipientAddHandler

This event is raised when a recipient is added to a group channel.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :name (String) —

    Matches the name of the group channel that the recipient is added to.

  • :owner_id (#resolve_id) —

    Matches the id of the group channel's owner.

  • :id (#resolve_id) —

    Matches the id of the recipient added to the group channel.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:

  • (ChannelRecipientAddHandler) —

    The event handler that was registered.



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# File 'lib/discordrb/container.rb', line 193

def channel_recipient_add(attributes = {}, &block)
  register_event(ChannelRecipientAddEvent, attributes, block)
end

#channel_recipient_remove(attributes = {}) {|event| ... } ⇒ ChannelRecipientRemoveHandler

This event is raised when a recipient is removed from a group channel.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :name (String) —

    Matches the name of the group channel that the recipient is added to.

  • :owner_id (#resolve_id) —

    Matches the id of the group channel's owner.

  • :id (#resolve_id) —

    Matches the id of the recipient removed from the group channel.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:

  • (ChannelRecipientRemoveHandler) —

    The event handler that was registered.



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# File 'lib/discordrb/container.rb', line 205

def channel_recipient_remove(attributes = {}, &block)
  register_event(ChannelRecipientRemoveEvent, attributes, block)
end

#channel_update(attributes = {}) {|event| ... } ⇒ ChannelUpdateEventHandler

This event is raised when a channel is updated.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :type (Integer) —

    Matches the type of channel that is being updated (0: text, 1: private, 2: voice, 3: group).

  • :name (String) —

    Matches the new name of the channel.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 170

def channel_update(attributes = {}, &block)
  register_event(ChannelUpdateEvent, attributes, block)
end

#clear! ⇒ Object

Removes all events from this event handler.



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# File 'lib/discordrb/container.rb', line 353

def clear!
  @event_handlers.clear if @event_handlers
end

#disconnected(attributes = {}) {|event| ... } ⇒ DisconnectEventHandler

This event is raised when the bot has disconnected from the WebSocket, due to the Bot#stop method or external causes. It's the recommended way to do clean-up tasks.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    Event attributes, none in this particular case

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 55

def disconnected(attributes = {}, &block)
  register_event(DisconnectEvent, attributes, block)
end

#heartbeat(attributes = {}) {|event| ... } ⇒ HeartbeatEventHandler

This event is raised every time the bot sends a heartbeat over the galaxy. This happens roughly every 40 seconds, but may happen at a lower rate should Discord change their interval. It may also happen more quickly for periods of time, especially for unstable connections, since discordrb rather sends a heartbeat than not if there's a choice. (You shouldn't rely on all this to be accurately timed.)

All this makes this event useful to periodically trigger something, like doing some API request every hour, setting some kind of uptime variable or whatever else. The only limit is yourself.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    Event attributes, none in this particular case

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 70

def heartbeat(attributes = {}, &block)
  register_event(HeartbeatEvent, attributes, block)
end

#include_events(container) ⇒ Object Also known as: include!

Adds all event handlers from another container into this one. Existing event handlers will be overwritten.

Parameters:



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# File 'lib/discordrb/container.rb', line 368

def include_events(container)
  handlers = container.instance_variable_get '@event_handlers'
  return unless handlers

  @event_handlers ||= {}
  @event_handlers.merge!(handlers) { |_, old, new| old + new }
end

#member_join(attributes = {}) {|event| ... } ⇒ ServerMemberAddEventHandler

This event is raised when a new user joins a server.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :username (String) —

    Matches the username of the joined user.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 230

def member_join(attributes = {}, &block)
  register_event(ServerMemberAddEvent, attributes, block)
end

#member_leave(attributes = {}) {|event| ... } ⇒ ServerMemberDeleteEventHandler

This event is raised when a member leaves a server.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :username (String) —

    Matches the username of the member.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 250

def member_leave(attributes = {}, &block)
  register_event(ServerMemberDeleteEvent, attributes, block)
end

#member_update(attributes = {}) {|event| ... } ⇒ ServerMemberUpdateEventHandler

This event is raised when a member update happens.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :username (String) —

    Matches the username of the updated user.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 240

def member_update(attributes = {}, &block)
  register_event(ServerMemberUpdateEvent, attributes, block)
end

#mention(attributes = {}) {|event| ... } ⇒ MentionEventHandler

This event is raised when the bot is mentioned in a message.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :start_with (String, Regexp) —

    Matches the string the message starts with.

  • :end_with (String, Regexp) —

    Matches the string the message ends with.

  • :contains (String, Regexp) —

    Matches a string the message contains.

  • :in (String, Integer, Channel) —

    Matches the channel the message was sent in.

  • :from (String, Integer, User) —

    Matches the user that sent the message.

  • :content (String) —

    Exactly matches the entire content of the message.

  • :after (Time) —

    Matches a time after the time the message was sent at.

  • :before (Time) —

    Matches a time before the time the message was sent at.

  • :private (Boolean) —

    Matches whether or not the channel is private.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 148

def mention(attributes = {}, &block)
  register_event(MentionEvent, attributes, block)
end

#message(attributes = {}) {|event| ... } ⇒ MessageEventHandler

This event is raised when a message is sent to a text channel the bot is currently in.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :start_with (String, Regexp) —

    Matches the string the message starts with.

  • :end_with (String, Regexp) —

    Matches the string the message ends with.

  • :contains (String, Regexp) —

    Matches a string the message contains.

  • :in (String, Integer, Channel) —

    Matches the channel the message was sent in.

  • :from (String, Integer, User) —

    Matches the user that sent the message.

  • :content (String) —

    Exactly matches the entire content of the message.

  • :after (Time) —

    Matches a time after the time the message was sent at.

  • :before (Time) —

    Matches a time before the time the message was sent at.

  • :private (Boolean) —

    Matches whether or not the channel is private.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 35

def message(attributes = {}, &block)
  register_event(MessageEvent, attributes, block)
end

#message_delete(attributes = {}) {|event| ... } ⇒ MessageDeleteEventHandler

This event is raised when a message is deleted in a channel.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :id (#resolve_id) —

    Matches the ID of the message that was deleted.

  • :in (String, Integer, Channel) —

    Matches the channel the message was deleted in.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 107

def message_delete(attributes = {}, &block)
  register_event(MessageDeleteEvent, attributes, block)
end

#message_edit(attributes = {}) {|event| ... } ⇒ MessageEditEventHandler

This event is raised when a message is edited in a channel.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :id (#resolve_id) —

    Matches the ID of the message that was edited.

  • :in (String, Integer, Channel) —

    Matches the channel the message was edited in.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 96

def message_edit(attributes = {}, &block)
  register_event(MessageEditEvent, attributes, block)
end

#playing(attributes = {}) {|event| ... } ⇒ PlayingEventHandler

This event is raised when the game a user is playing changes.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :from (String, Integer, User) —

    Matches the user whose playing game changes.

  • :game (String) —

    Matches the game the user is now playing.

  • :type (Integer) —

    Matches the type of game object (0 game, 1 Twitch stream)

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 130

def playing(attributes = {}, &block)
  register_event(PlayingEvent, attributes, block)
end

#pm(attributes = {}) {|event| ... } ⇒ PrivateMessageEventHandler Also known as: private_message, direct_message, dm

This event is raised when a private message is sent to the bot.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :start_with (String, Regexp) —

    Matches the string the message starts with.

  • :end_with (String, Regexp) —

    Matches the string the message ends with.

  • :contains (String, Regexp) —

    Matches a string the message contains.

  • :in (String, Integer, Channel) —

    Matches the channel the message was sent in.

  • :from (String, Integer, User) —

    Matches the user that sent the message.

  • :content (String) —

    Exactly matches the entire content of the message.

  • :after (Time) —

    Matches a time after the time the message was sent at.

  • :before (Time) —

    Matches a time before the time the message was sent at.

  • :private (Boolean) —

    Matches whether or not the channel is private.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 335

def pm(attributes = {}, &block)
  register_event(PrivateMessageEvent, attributes, block)
end

#presence(attributes = {}) {|event| ... } ⇒ PresenceEventHandler

This event is raised when a user's status (online/offline/idle) changes.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :from (String, Integer, User) —

    Matches the user whose status changed.

  • :status (:offline, :idle, :online) —

    Matches the status the user has now.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 118

def presence(attributes = {}, &block)
  register_event(PresenceEvent, attributes, block)
end

#ready(attributes = {}) {|event| ... } ⇒ ReadyEventHandler

This event is raised when the READY packet is received, i. e. servers and channels have finished initialization. It's the recommended way to do things when the bot has finished starting up.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    Event attributes, none in this particular case

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

  • event (ReadyEvent) —

    The event that was raised.

Returns:



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# File 'lib/discordrb/container.rb', line 45

def ready(attributes = {}, &block)
  register_event(ReadyEvent, attributes, block)
end

#remove_handler(handler) ⇒ Object

Removes an event handler from this container. If you're looking for a way to do temporary events, I recommend Awaits instead of this.

Parameters:



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# File 'lib/discordrb/container.rb', line 346

def remove_handler(handler)
  clazz = EventContainer.event_class(handler.class)
  @event_handlers ||= {}
  @event_handlers[clazz].delete(handler)
end

#server_create(attributes = {}) {|event| ... } ⇒ ServerCreateEventHandler

This event is raised when a server is created respective to the bot, i. e. the bot joins a server or creates a new one itself. It should never be necessary to listen to this event as it will only ever be triggered by things the bot itself does, but one can never know.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 284

def server_create(attributes = {}, &block)
  register_event(ServerCreateEvent, attributes, block)
end

#server_delete(attributes = {}) {|event| ... } ⇒ ServerDeleteEventHandler

This event is raised when a server is deleted, or when the bot leaves a server. (These two cases are identical to Discord.)

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 305

def server_delete(attributes = {}, &block)
  register_event(ServerDeleteEvent, attributes, block)
end

#server_update(attributes = {}) {|event| ... } ⇒ ServerUpdateEventHandler

This event is raised when a server is updated, for example if the name or region has changed.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 294

def server_update(attributes = {}, &block)
  register_event(ServerUpdateEvent, attributes, block)
end

#typing(attributes = {}) {|event| ... } ⇒ TypingEventHandler

This event is raised when somebody starts typing in a channel the bot is also in. The official Discord client would display the typing indicator for five seconds after receiving this event. If the user continues typing after five seconds, the event will be re-raised.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :in (String, Integer, Channel) —

    Matches the channel where typing was started.

  • :from (String, Integer, User) —

    Matches the user that started typing.

  • :after (Time) —

    Matches a time after the time the typing started.

  • :before (Time) —

    Matches a time before the time the typing started.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 85

def typing(attributes = {}, &block)
  register_event(TypingEvent, attributes, block)
end

#user_ban(attributes = {}) {|event| ... } ⇒ UserBanEventHandler

This event is raised when a user is banned from a server.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 261

def user_ban(attributes = {}, &block)
  register_event(UserBanEvent, attributes, block)
end

#user_unban(attributes = {}) {|event| ... } ⇒ UserUnbanEventHandler

This event is raised when a user is unbanned from a server.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 272

def user_unban(attributes = {}, &block)
  register_event(UserUnbanEvent, attributes, block)
end

#voice_state_update(attributes = {}) {|event| ... } ⇒ VoiceStateUpdateEventHandler

This event is raised when a user's voice state changes.

Parameters:

  • attributes (Hash) (defaults to: {}) —

    The event's attributes.

Options Hash (attributes):

  • :from (String, Integer, User) —

    Matches the user that sent the message.

  • :channel (String, Integer, Channel) —

    Matches the voice channel the user has joined.

  • :mute (true, false) —

    Matches whether or not the user is muted server-wide.

  • :deaf (true, false) —

    Matches whether or not the user is deafened server-wide.

  • :self_mute (true, false) —

    Matches whether or not the user is muted by the bot.

  • :self_deaf (true, false) —

    Matches whether or not the user is deafened by the bot.

Yields:

  • The block is executed when the event is raised.

Yield Parameters:

Returns:



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# File 'lib/discordrb/container.rb', line 220

def voice_state_update(attributes = {}, &block)
  register_event(VoiceStateUpdateEvent, attributes, block)
end