Basic stickers support

lib/discordrb/data.rb

@@ -44,5 +44,6 @@
 require 'discordrb/data/collectibles'
 require 'discordrb/data/primary_server'
 require 'discordrb/data/server_preview'
+require 'discordrb/data/sticker'
 require 'discordrb/data/call'
 require 'discordrb/data/snapshot'

lib/discordrb/data/message.rb

@@ -101,6 +101,10 @@ class Message
     # @return [Array<Embed>] the embed objects contained in this message.
     attr_reader :embeds
 
+    # @return [Array<Sticker>] the sticker objects contained in this message.
+    attr_reader :sticker_items
+    alias_method :stickers, :sticker_items
+
     # @return [Array<Reaction>] the reaction objects contained in this message.
     attr_reader :reactions
 
@@ -228,6 +232,9 @@ def initialize(data, bot)
 
       @pinned_at = data['pinned_at'] ? Time.parse(data['pinned_at']) : nil
 
+      @sticker_items = []
+      @sticker_items = data['sticker_items'].map { |e| Sticker::Item.new(e, self, @bot) } if data['sticker_items']
+
       @call = data['call'] ? Call.new(data['call'], @bot) : nil
 
       @snapshots = data['message_snapshots']&.map { |snapshot| Snapshot.new(snapshot['message'], @bot) } || []

lib/discordrb/data/sticker.rb

@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+module Discordrb
+  # Server sticker
+  class Sticker
+    FORMATS = {
+      png: 1,
+      apng: 2,
+      lottie: 3,
+      gif: 4
+    }.freeze
+
+    class Item
+      include IDObject
+
+      FORMATS.each do |name, value|
+        define_method("#{name}?") do
+          @format_type == value
+        end
+      end
+
+      # @return [Message] the message this sticker belongs to.
+      attr_reader :message
+
+      # @return [String] the sticker name
+      attr_reader :name
+
+      # @return [String] the sticker description
+      attr_reader :description
+
+      # @return [Integer] the sticker type
+      attr_reader :format_type
+
+      # @return [String] the sticker extension
+      attr_reader :extension
+
+      # @!visibility private
+      def initialize(data, message, bot)
+        @bot = bot
+        @message = message
+
+        @name = data['name']
+        @description = data['description']
+        @id = data['id']&.to_i
+        @format_type = data['format_type']
+
+        case @format_type
+        when 1, 2
+          @extension = 'png'
+        when 3
+          @extension = 'json'
+        when 4
+          @extension = 'gif'
+        end
+      end
+    end
+  end
+end