portainer/app/docker/helpers/labelHelper.js

angular.module('portainer.docker')
.factory('LabelHelper', [function LabelHelperFactory() {
  'use strict';
  return {
    fromLabelHashToKeyValue: function(labels) {
      if (labels) {
        return Object.keys(labels).map(function(key) {
          return {key: key, value: labels[key], originalKey: key, originalValue: labels[key], added: true};
        });
      }
      return [];
    },
    fromKeyValueToLabelHash: function(labelKV) {
      var labels = {};
      if (labelKV) {
        labelKV.forEach(function(label) {
          labels[label.key] = label.value;
        });
      }
      return labels;
    }
  };
}]);