[MM-61756] Attribute Based Access Control - Phase 1 (#30785)

Attribute Based Access Control - Base
* MM-63662

* MM-63919

* MM-63954

* MM-63955 

* MM-63425

* MM-63426

* MM-63458

* MM-63459

* MM-63603

* MM-63845

* MM-64146

* MM-64199

* MM-64201

* MM-64233

* MM-64247

* MM-64268

---------

Co-authored-by: Harshil Sharma <harshilsharma63@gmail.com>
Co-authored-by: Pablo Andrés Vélez Vidal <pablovv2012@gmail.com>
Co-authored-by: abhijit-singh <abhijitsingh0702@gmail.com>
Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

server/channels/app/channels.go

@@ -64,6 +64,7 @@ type Channels struct {
 	Saml             einterfaces.SamlInterface
 	Notification     einterfaces.NotificationInterface
 	Ldap             einterfaces.LdapInterface
+	AccessControl    einterfaces.AccessControlServiceInterface
 
 	// These are used to prevent concurrent upload requests
 	// for a given upload session which could cause inconsistencies
@@ -132,6 +133,23 @@ func NewChannels(s *Server) (*Channels, error) {
 			}
 		})
 	}
+	if accessControlServiceInterface != nil {
+		app := New(ServerConnector(ch))
+		ch.AccessControl = accessControlServiceInterface(app)
+
+		appErr := ch.AccessControl.Init(request.EmptyContext(s.Log()))
+		if appErr != nil {
+			s.Log().Error("An error occurred while initializing Access Control", mlog.Err(appErr))
+		}
+
+		app.AddLicenseListener(func(newCfg, old *model.License) {
+			if ch.AccessControl != nil {
+				if appErr := ch.AccessControl.Init(request.EmptyContext(s.Log())); appErr != nil {
+					s.Log().Error("An error occurred while initializing Access Control", mlog.Err(appErr))
+				}
+			}
+		})
+	}
 
 	var imgErr error
 	decoderConcurrency := int(*ch.cfgSvc.Config().FileSettings.MaxImageDecoderConcurrency)