initial rebuild from v1

app/models/user.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+# Model: User
+#
+# Description: Define an application user. the only authentication mecanism
+# is omniauthable with the BattleNet API
+class User < ApplicationRecord
+  devise :rememberable, :omniauthable, omniauth_providers: [:bnet]
+
+  has_many :wow_characters, dependent: :destroy
+
+  validates :battletag, presence: true, uniqueness: true
+
+  def self.from_omniauth(auth)
+    user = User.where(provider: auth.provider, uid: auth.uid).first_or_initialize
+
+    user.provider = auth.provider
+    user.uid = auth.uid
+    user.battletag = auth.info.battletag
+    user.token_expires = auth.credentials.expires
+    user.token_expire_at = Time.at(auth.credentials.expires_at).utc
+    user.token = auth.credentials.token
+
+    user.save
+
+    user
+  end
+
+  def self.new_with_session(params, session)
+    super.tap do |user|
+      if (data = session['devise.bnet_data']) && session['devise.bnet_data']['extra']['raw_info']
+        user.email = data['email'] if user.email.blank?
+      end
+    end
+  end
+end