Adds types

app/models/user.rb

@@ -1,4 +1,8 @@
+# typed: true
+
 class User < ApplicationRecord
+  extend T::Sig
+
   has_secure_password
 
   # Associations
@@ -10,7 +14,7 @@ class User < ApplicationRecord
 
   # Validations
   validates :email, presence: true, uniqueness: { case_sensitive: false }, format: { with: URI::MailTo::EMAIL_REGEXP }
-  validates :username, presence: true, uniqueness: { case_sensitive: false }, 
+  validates :username, presence: true, uniqueness: { case_sensitive: false },
                        length: { minimum: 3, maximum: 30 },
                        format: { with: /\A[a-zA-Z0-9_]+\z/, message: "only allows letters, numbers, and underscores" }
   validates :password, length: { minimum: 8 }, if: -> { password.present? }
@@ -20,22 +24,26 @@ class User < ApplicationRecord
   before_save :downcase_email
 
   # Instance methods
+  sig { returns(T::Boolean) }
   def generate_password_reset_token
     self.password_reset_token = SecureRandom.urlsafe_base64
     self.password_reset_sent_at = Time.current
     save!
   end
 
+  sig { returns(T::Boolean) }
   def password_reset_expired?
     password_reset_sent_at.nil? || password_reset_sent_at < 2.hours.ago
   end
 
+  sig { returns(String) }
   def theme_class
     "theme-#{theme}"
   end
 
   private
 
+  sig { void }
   def downcase_email
     self.email = email.downcase if email.present?
   end