Feature: Ability to switch between multiple accounts (#881)

* Feature: Ability to switch between multiple accounts

* Fix rubocop

* Fix assigned inboxes

* fix auth json

* Add account switcher in UI

* fix ordering on administrate

* Add switch accounts to sidebar

* add account id

* Fix schema.rb timestamp

* Revert "add account id"

This reverts commit 27570f50ef584cb9a5f69454f43f630b318c8807.

* Add a check for account

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

app/models/user.rb

@@ -64,7 +64,7 @@ class User < ApplicationRecord
 
   has_many :assigned_conversations, foreign_key: 'assignee_id', class_name: 'Conversation', dependent: :nullify
   has_many :inbox_members, dependent: :destroy
-  has_many :assigned_inboxes, through: :inbox_members, source: :inbox
+  has_many :inboxes, through: :inbox_members, source: :inbox
   has_many :messages
   has_many :invitees, through: :account_users, class_name: 'User', foreign_key: 'inviter_id', dependent: :nullify
 
@@ -74,9 +74,7 @@ class User < ApplicationRecord
 
   before_validation :set_password_and_uid, on: :create
 
-  after_create :notify_creation, :create_access_token
-
-  after_destroy :notify_deletion
+  after_create :create_access_token
 
   def send_devise_notification(notification, *args)
     devise_mailer.send(notification, self, *args).deliver_later
@@ -86,30 +84,36 @@ class User < ApplicationRecord
     self.uid = email
   end
 
-  def account_user
-    # FIXME : temporary hack to transition over to multiple accounts per user
-    # We should be fetching the current account user relationship here.
-    account_users&.first
+  def active_account_user
+    account_users.order(active_at: :desc)&.first
+  end
+
+  def current_account_user
+    account_users.find_by(account_id: Current.account.id) if Current.account
   end
 
   def account
-    account_user&.account
+    current_account_user&.account
+  end
+
+  def assigned_inboxes
+    inboxes.where(account_id: Current.account.id)
   end
 
   def administrator?
-    account_user&.administrator?
+    current_account_user&.administrator?
   end
 
   def agent?
-    account_user&.agent?
+    current_account_user&.agent?
   end
 
   def role
-    account_user&.role
+    current_account_user&.role
   end
 
   def inviter
-    account_user&.inviter
+    current_account_user&.inviter
   end
 
   def serializable_hash(options = nil)
@@ -118,14 +122,6 @@ class User < ApplicationRecord
     serialized_user
   end
 
-  def notify_creation
-    Rails.configuration.dispatcher.dispatch(AGENT_ADDED, Time.zone.now, account: account)
-  end
-
-  def notify_deletion
-    Rails.configuration.dispatcher.dispatch(AGENT_REMOVED, Time.zone.now, account: account)
-  end
-
   def push_event_data
     {
       id: id,