portainer/app/docker/components/host-view-panels/swarm-node-details-panel/swarm-node-details-panel-controller.js

angular
  .module('portainer.docker')
  .controller('SwarmNodeDetailsPanelController', [
    'NodeService', 'LabelHelper', 'Notifications', '$state',
    function SwarmNodeDetailsPanelController(NodeService, LabelHelper, Notifications, $state) {
      var ctrl = this;
      ctrl.state = {
        managerAddress: '',
        hasChanges: false
      };
      ctrl.$onChanges = $onChanges;
      ctrl.addLabel = addLabel;
      ctrl.updateNodeLabels = updateNodeLabels;
      ctrl.updateNodeAvailability = updateNodeAvailability;
      ctrl.saveChanges = saveChanges;
      ctrl.cancelChanges = cancelChanges;

      var managerRole = 'manager';

      function $onChanges() {
        if (!ctrl.details) {
          return;
        }
        if (ctrl.details.role === managerRole) {
          ctrl.state.managerAddress = '(' + ctrl.details.managerAddress + ')';
        }
      }

      function addLabel() {
        ctrl.details.nodeLabels.push({
          key: '',
          value: '',
          originalValue: '',
          originalKey: ''
        });
      }

      function updateNodeLabels(labels) {
        ctrl.details.nodeLabels = labels;
        ctrl.state.hasChanges = true;
      }

      function updateNodeAvailability(availability) {
        ctrl.details.availability = availability;
        ctrl.state.hasChanges = true;
      }

      function saveChanges() {
        var originalNode = ctrl.originalNode;
        var config = {
          Name: originalNode.Name,
          Availability: ctrl.details.availability,
          Role: originalNode.Role,
          Labels: LabelHelper.fromKeyValueToLabelHash(ctrl.details.nodeLabels),
          Id: originalNode.Id,
          Version: originalNode.Version
        };

        NodeService.updateNode(config)
          .then(onUpdateSuccess)
          .catch(notifyOnError);

        function onUpdateSuccess() {
          Notifications.success('Node successfully updated', 'Node updated');
          $state.go(
            'docker.nodes.node',
            { id: originalNode.Id },
            { reload: true }
          );
        }

        function notifyOnError(error) {
          Notifications.error('Failure', error, 'Failed to update node');
        }
      }

      function cancelChanges() {
        cancelLabelChanges();
        ctrl.details.availability = ctrl.originalNode.Availability;
        ctrl.state.hasChanges = false;
      }

      function cancelLabelChanges() {
        ctrl.details.nodeLabels = ctrl.details.nodeLabels
          .filter(function(label) {
            return label.originalValue || label.originalKey;
          })
          .map(function(label) {
            return Object.assign(label, {
              value: label.originalValue,
              key: label.originalKey
            });
          });
      }
    }
  ]);