Gab Social. All are welcome.

app/models/custom_emoji.rb

@@ -0,0 +1,82 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: custom_emojis
+#
+#  id                 :bigint(8)        not null, primary key
+#  shortcode          :string           default(""), not null
+#  domain             :string
+#  image_file_name    :string
+#  image_content_type :string
+#  image_file_size    :integer
+#  image_updated_at   :datetime
+#  created_at         :datetime         not null
+#  updated_at         :datetime         not null
+#  disabled           :boolean          default(FALSE), not null
+#  uri                :string
+#  image_remote_url   :string
+#  visible_in_picker  :boolean          default(TRUE), not null
+#
+
+class CustomEmoji < ApplicationRecord
+  LIMIT = 50.kilobytes
+
+  SHORTCODE_RE_FRAGMENT = '[a-zA-Z0-9_]{2,}'
+
+  SCAN_RE = /(?<=[^[:alnum:]:]|\n|^)
+    :(#{SHORTCODE_RE_FRAGMENT}):
+    (?=[^[:alnum:]:]|$)/x
+
+  has_one :local_counterpart, -> { where(domain: nil) }, class_name: 'CustomEmoji', primary_key: :shortcode, foreign_key: :shortcode
+
+  has_attached_file :image, styles: { static: { format: 'png', convert_options: '-coalesce -strip' } }
+
+  before_validation :downcase_domain
+
+  validates_attachment :image, content_type: { content_type: 'image/png' }, presence: true, size: { less_than: LIMIT }
+  validates :shortcode, uniqueness: { scope: :domain }, format: { with: /\A#{SHORTCODE_RE_FRAGMENT}\z/ }, length: { minimum: 2 }
+
+  scope :local,      -> { where(domain: nil) }
+  scope :remote,     -> { where.not(domain: nil) }
+  scope :alphabetic, -> { order(domain: :asc, shortcode: :asc) }
+
+  remotable_attachment :image, LIMIT
+
+  include Attachmentable
+
+  after_commit :remove_entity_cache
+
+  def local?
+    domain.nil?
+  end
+
+  def object_type
+    :emoji
+  end
+
+  class << self
+    def from_text(text, domain)
+      return [] if text.blank?
+
+      shortcodes = text.scan(SCAN_RE).map(&:first).uniq
+
+      return [] if shortcodes.empty?
+
+      EntityCache.instance.emoji(shortcodes, domain)
+    end
+
+    def search(shortcode)
+      where('"custom_emojis"."shortcode" ILIKE ?', "%#{shortcode}%")
+    end
+  end
+
+  private
+
+  def remove_entity_cache
+    Rails.cache.delete(EntityCache.instance.to_key(:emoji, shortcode, domain))
+  end
+
+  def downcase_domain
+    self.domain = domain.downcase unless domain.nil?
+  end
+end