chore: Add controllers for conversation participants (#6462)

Co-authored-by: Aswin Dev P.S <aswindevps@gmail.com>
Co-authored-by: Sojan Jose <sojan@chatwoot.com>

app/models/user.rb

@@ -48,6 +48,7 @@ class User < ApplicationRecord
   include Rails.application.routes.url_helpers
   include Reportable
   include SsoAuthenticatable
+  include UserAttributeHelpers
 
   devise :database_authenticatable,
          :registerable,
@@ -76,6 +77,8 @@ class User < ApplicationRecord
   has_many :assigned_conversations, foreign_key: 'assignee_id', class_name: 'Conversation', dependent: :nullify
   alias_attribute :conversations, :assigned_conversations
   has_many :csat_survey_responses, foreign_key: 'assigned_agent_id', dependent: :nullify
+  has_many :conversation_participants, dependent: :destroy_async
+  has_many :participating_conversations, through: :conversation_participants, source: :conversation
 
   has_many :inbox_members, dependent: :destroy_async
   has_many :inboxes, through: :inbox_members, source: :inbox
@@ -110,60 +113,10 @@ class User < ApplicationRecord
     self.uid = email
   end
 
-  def active_account_user
-    account_users.order(active_at: :desc)&.first
-  end
-
-  def current_account_user
-    # We want to avoid subsequent queries in case where the association is preloaded.
-    # using where here will trigger n+1 queries.
-    account_users.find { |ac_usr| ac_usr.account_id == Current.account.id } if Current.account
-  end
-
-  def available_name
-    self[:display_name].presence || name
-  end
-
-  # Used internally for Chatwoot in Chatwoot
-  def hmac_identifier
-    hmac_key = GlobalConfig.get('CHATWOOT_INBOX_HMAC_KEY')['CHATWOOT_INBOX_HMAC_KEY']
-    return OpenSSL::HMAC.hexdigest('sha256', hmac_key, email) if hmac_key.present?
-
-    ''
-  end
-
-  def account
-    current_account_user&.account
-  end
-
   def assigned_inboxes
     administrator? ? Current.account.inboxes : inboxes.where(account_id: Current.account.id)
   end
 
-  def administrator?
-    current_account_user&.administrator?
-  end
-
-  def agent?
-    current_account_user&.agent?
-  end
-
-  def role
-    current_account_user&.role
-  end
-
-  def availability_status
-    current_account_user&.availability_status
-  end
-
-  def auto_offline
-    current_account_user&.auto_offline
-  end
-
-  def inviter
-    current_account_user&.inviter
-  end
-
   def serializable_hash(options = nil)
     super(options).merge(confirmed: confirmed?)
   end