Adding embedded PuSH server

app/models/account.rb

@@ -44,8 +44,12 @@ class Account < ApplicationRecord
   has_many :block_relationships, class_name: 'Block', foreign_key: 'account_id', dependent: :destroy
   has_many :blocking, -> { order('blocks.id desc') }, through: :block_relationships, source: :target_account
 
+  # Media
   has_many :media_attachments, dependent: :destroy
 
+  # PuSH subscriptions
+  has_many :subscriptions, dependent: :destroy
+
   pg_search_scope :search_for, against: { username: 'A', domain: 'B' }, using: { tsearch: { prefix: true } }
 
   scope :remote, -> { where.not(domain: nil) }

app/models/subscription.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+class Subscription < ApplicationRecord
+  MIN_EXPIRATION = 3600 * 24
+  MAX_EXPIRATION = 3600 * 24 * 30
+
+  belongs_to :account
+
+  validates :callback_url, presence: true
+  validates :callback_url, uniqueness: { scope: :account_id }
+
+  scope :active, -> { where(confirmed: true).where('expires_at > ?', Time.now.utc) }
+
+  def lease_seconds=(str)
+    self.expires_at = Time.now.utc + [[MIN_EXPIRATION, str.to_i].max, MAX_EXPIRATION].min.seconds
+  end
+
+  def lease_seconds
+    (expires_at - Time.now.utc).to_i
+  end
+
+  before_validation :set_min_expiration
+
+  private
+
+  def set_min_expiration
+    self.lease_seconds = 0 unless expires_at
+  end
+end