角度模态服务未知提供商

我正在尝试让一个角度模态形式工作，但我总是收到一个未知的提供程序错误。 我想我已经包含了所有必要的文件？

这是我调用服务的代码：

      function deleteConfirm() {
        var modalOptions = {
          closeButtonText: 'Cancel',
          actionButtonText: 'Delete Supplier',
          headerText: 'Delete ' + supplierName + '?',
          bodyText: 'Are you sure you want to delete this supplier?'
        };
        modalService.showModal({}, modalOptions).then(function(result) {
          if (result === 'ok') {
            alert("ok");
          }
        }, function(error) {
          alert("Error deleting");
        });
      }

这是该服务的代码：

(function() {
  'use strict';
  modalService.$inject = '$uibModal';
  angular.module('plunker').factory('modalService', modalService);
  function modalService($uibModal) {
    var injectParams = ['$uibModal'];
    //var modalService = function($uibModal) {
    var modalDefaults = {
      backdrop: true,
      keyboard: true,
      modalFade: true,
      templateUrl: 'modal.html'
    };
    var modalOptions = {
      closeButtonText: 'Close',
      actionButtonText: 'OK',
      headerText: 'Proceed?',
      bodyText: 'Perform this action?'
    };
    this.showModal = function(customModalDefaults, customModalOptions) {
      if (!customModalDefaults) customModalDefaults = {};
      customModalDefaults.backdrop = 'static';
      return this.show(customModalDefaults, customModalOptions);
    };
    this.show = function(customModalDefaults, customModalOptions) {
      //Create temp objects to work with since we're in a singleton service
      var tempModalDefaults = {};
      var tempModalOptions = {};
      //Map angular-ui modal custom defaults to modal defaults defined in this service
      angular.extend(tempModalDefaults, modalDefaults, customModalDefaults);
      //Map modal.html $scope custom properties to defaults defined in this service
      angular.extend(tempModalOptions, modalOptions, customModalOptions);
      if (!tempModalDefaults.controller) {
        tempModalDefaults.controller = function($scope, $uibModalInstance) {
          $scope.modalOptions = tempModalOptions;
          $scope.modalOptions.ok = function(result) {
            $uibModalInstance.close('ok');
          };
          $scope.modalOptions.close = function(result) {
            $uibModalInstance.close('cancel');
          };
        };
        tempModalDefaults.controller.$inject = ['$scope', '$uibModalInstance'];
      }
      return $uibModal.open(tempModalDefaults).result;
    };
  }
}());

http://plnkr.co/edit/xNpbI42UJm8acODSOimR

感谢您的任何帮助