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如何在UI-Router中修飾當前狀態解析功能?不調用當前函數

[英]How to decorate current state resolve function in UI-Router? Current function isn't invoked

我試圖在$stateProvider干,並阻止在每個解析中添加相同的auth函數。 我已經創建了裝飾器,在每個狀態更改都會將此函數添加到當前狀態,但是不調用auth函數,如何修復它或如何解決已討論的問題?

app.config(function ($stateProvider, $urlRouterProvider, $provide) {
  $provide.decorator('$state', function($delegate, $rootScope) {
    $rootScope.$on('$stateChangeStart', function(event, state, params) {
      if ($delegate.current === "login" || $delegate.current === "register") {
        return;
      }
      console.log("decorator", $delegate);
      $delegate.current.resolve = {
        auth: ['AuthService', '$stateParams', function(AuthService, $stateParams) {
          //how to invoke this function?
          if (AuthService.isAuthenticated()) {
            return AuthService.me(); //promise
          } else {
            return false;
          }
        }]
      };
    });
    return $delegate;
  });

州定義:

  $stateProvider.state('root', {
    abstract: true,
    url: '/',
    views: {
      "": {
        controller: 'RootCtrl',
        templateUrl: 'views/root.html'
      },
      "header@root": {
        templateUrl: 'views/header.html'
      }
    }
  })
  .state('root.home', {
    url: urlPrefix,
    views: {
      "content@artworks": {
        templateUrl: 'views/home.html',
        //resolve: {
        //  auth: ['AuthService', '$stateParams', function(AuthService, $stateParams) {
        //  }]
        //}
      }
    }
  })
  ...

如果我正確理解您的要求,我們可以使用本機UI-Router內置decorator

decorator(name, func)

允許您擴展(小心)或覆蓋(由您自己承擔)$ stateProvider內部使用的stateBuilder對象。 這可用於向ui-router添加自定義功能,例如根據州名稱推斷templateUrl ... 在doc中閱讀更多內容

一個工作的plunker

所以,我們可以有這個var auth

var auth = ['AuthService', '$stateParams',
  function(AuthService, $stateParams) {
    //how to invoke this function on needed states?
    if (AuthService.isAuthenticated()) {
      return AuthService.me();
    } else {
      return false;
    }
  }
];

在這里我們只使用裝飾器和一些“IF”邏輯

.config(['$stateProvider', 
  function($stateProvider) {

    $stateProvider.decorator('views', function(state, parent) {
      var result = {},
        views = parent(state);

      // some naive example when to not inject resolve
      if (state.name === "home") { 
        return views;
      }
      // child already has that in parent
      if (state.name.indexOf(".") > 0) { 
        return views;
      }

      angular.forEach(views, function(config, name) {

        // here inject the resolve (if not existing)
        config.resolve = config.resolve || {};
        // and extend it with the auth stuff above
        config.resolve.auth = auth;

        result[name] = config;
      });

      return result;
    });

  }
])

后來很少有我們的州,這將由上述東西擴展

$stateProvider
    .state('home', {
      url: "/home",
      templateUrl: 'tpl.html',
    })
    .state('parent', {
      url: "/parent",
      templateUrl: 'tpl.html',
      controller: 'SharedCtrl',
    })
    .state('parent.child', {
      url: "/child",
      templateUrl: 'tpl.html',
      controller: 'SharedCtrl',
    });

這里檢查它

我意識到$delegate.current對象只包含原始的stateProvider配置數據。 要包裝解析函數,我將我的函數添加到$delegate.$current對每個狀態的更改。

$provide.decorator('$state', function($delegate, $rootScope) {
  $rootScope.$on('$stateChangeStart', function(event, state, params) {
    if ($delegate.current === "err404" || $delegate.current === "login" || $delegate.current === "register") {
      return;
    }
    console.log("decorator", $delegate);
    $delegate.$current.resolve["auth"] = ['AuthService', '$stateParams', function(AuthService, $stateParams) {
      if (AuthService.isAuthenticated()) {
        console.log('AuthService.me()');
        return AuthService.me();
      } else {
        return false;
      }
    }]
  });
  return $delegate;
});

更新

我在github上找到了相關的討論,你可以在toState param中添加通用解析函數:

app.run(['$rootScope', '$state',
  function($rootScope, $state) {

    $rootScope.$on('$stateChangeStart', function(event, toState) {

      if (toState.name === "login" || toState.name === "register") {
        return;
      }

      toState["resolve"]["auth"] = ['AuthService', '$stateParams', function(AuthService, $stateParams) {
        if (AuthService.isAuthenticated()) {
          return AuthService.me();
        } else {
          return false;
        }
      }];
    });
  }
]);

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