portainer/app/docker/helpers/volumeHelper.js

angular.module('portainer.docker')
.factory('VolumeHelper', [function VolumeHelperFactory() {
  'use strict';
  var helper = {};

  helper.createDriverOptions = function(optionArray) {
    var options = {};
    optionArray.forEach(function (option) {
      options[option.name] = option.value;
    });
    return options;
  };

  helper.isVolumeUsedByAService = function(volume, services) {
    for (var i = 0; i < services.length; i++) {
      var service = services[i];
      var mounts = service.Mounts;
      for (var j = 0; j < mounts.length; j++) {
        var mount = mounts[j];
        if (mount.Source === volume.Id) {
          return true;
        }
      }
    }

    return false;
  };

  return helper;
}]);