Execute directive code before controller - javascript

Hi I am trying to create a display loading box implementation but I seem to have some problems.Here is what I have so far:
I have created an httpInterceptor:
mainModule.factory('httpLoadingInterceptorSvc', ['$q', '$injector', 'EVENTS', function ($q, $injector, EVENTS) {
var httpInterceptorSvc = {};
httpInterceptorSvc.request = function (request) {
var rootScope = $injector.get('$rootScope');
rootScope.$broadcast(EVENTS.LOADING_SHOW);
return $q.when(request);
};
httpInterceptorSvc.requestError = function (rejection) {
hideLoadingBox();
return $q.reject(rejection);
};
httpInterceptorSvc.response = function (response) {
hideLoadingBox();
return $q.when(response);
};
httpInterceptorSvc.responseError = function (rejection) {
hideLoadingBox();
return $q.reject(rejection);
};
function hideLoadingBox() {
var $http = $injector.get('$http');
if ($http.pendingRequests.length < 1) {
var rootScope = $injector.get('$rootScope');
rootScope.$broadcast(EVENTS.LOADING_HIDE);
}
}
return httpInterceptorSvc;
}]);
I have then added the directive to the interceptors of the httpProvideR:
$httpProvider.interceptors.push('httpLoadingInterceptorSvc');
I then created a directive:
mainModule.directive('loadingDir', ['EVENTS', function (EVENTS) {
var loadingDir = {
restrict: 'E',
templateUrl: 'App/scripts/main/directives/loading/LoadingDir.html'
};
loadingDir.link = function (scope, element) {
element.hide();
scope.$on(EVENTS.LOADING_SHOW, function () {
element.show();
});
scope.$on(EVENTS.LOADING_HIDE, function () {
element.hide();
});
};
return loadingDir;
}]);
And then added a simple ajaxCall that alerts a message on the controller:
dataSvc.getCurrentDate().then(function(currentDate) {
alert(currentDate);
});
I put th edirective on the html page:
<loading-dir></loading-dir>
Now my problem is that the directive code gets executed after the controller code this makes the dierective relatively useles until the page is loaded.Is there any way to make the directive code execute before the controller?

You can prepend a div to your page:
<body>
<div controller="beforeController">
<loading-dir></loading-dir>
</div>
[Rest of the page]
</body>
And beforeController should be loaded instantly.

Related

bootstrap modal not close angular js

I am using UI bootstrap modal dialog box with angular js. Modal is successfully loaded. But when I click YES/NO Button, issued occurred & modal did not close.
Error said, ' $uibModal.close is not a function'.
.directive('confirm', function(ConfirmService) {
return {
restrict: 'A',
scope: {
eventHandler: '&ngClick'
},
link: function(scope, element, attrs){
element.unbind("click");
element.bind("click", function(e) {
ConfirmService.open(attrs.confirm, scope.eventHandler);
});
}
}
})
This is my service
.service('ConfirmService', function($uibModal) {
var service = {};
service.open = function (text, onOk) {
var modalInstance = $uibModal.open({
templateUrl: 'modules/confirmation-box/confirmation-box.html',
controller: 'userListCtrl',
resolve: {
text: function () {
return text;
}
}
});
modalInstance.result.then(function (selectedItem) {
onOk();
}, function () {
});
};
return service;
})
This is my controller file. I am trying to yes/no button inside the controller
.controller('userListCtrl',
['$scope','$http','appConfig','$uibModalInstance', '$uibModal','$log','alertService',
function ($scope,$http, appConfig,$uibModalInstance, $uibModal,$log,alertService) {
$scope.ok = function () {
$uibModalInstance.close();
};
$scope.cancel = function () {
$uibModalInstance.dismiss('cancel');
};
}]);
You're attempting to use two usage methods at once time. There are two (probably more) that you can use the $uibModal, but here are the two that I believe you're intermixing:
1) Service controls the modal and returns a promise, I believe this is what I think you're doing. You do not need to call close/dismiss manually in this instance. You can make the following changes:
service.open = function(text, onOK) {
var modalInstance = $uibModal.open({
templateUrl: 'modules/confirmation-box/confirmation-box.html',
controller: 'userListCtrl',
resolve: {
text: function () {
return text;
}
}
});
// Return so you can chain .then just in case. Generally we don't even
// do this, we just return the instance itself and allow the controller to
// decide how to handle results/rejections
return modalInstance.result;
}
In your template file you'd have something like:
<button type="button" ng-click="$close(selectedItem)"></button>
<button type="button" ng-click="$dismiss(readon)"></button>
2) If you want to use the close method directly, then you only need to change the service to:
...
return $uibModal.open({});
then in your controller:
var modal = service.open('confirm');
modal.result.then(...)
modal.close()
Edit - updated with change to op to remove the antipattern as per georgeawg suggestion.

angular get and set atributes via service

i can't find a solution to this, basicly everytime i do a login, i want to store the user that i get from the node end point in the service, after that in my main Controller i should get the name of the user, but that never happen, dunno why
here is the code:
app.controller('MainCtrl', function ($scope, $state,$location,$http,user) {
$scope.user = {
nome: user.getProperty()
};
$scope.showRegister = function () {
$state.go('register');
}
$scope.showLogin = function () {
$state.go('login');
}
});
app.controller('loginController', function ($scope, $http, $state,user) {
$scope.login = function () {
var data = {};
data.password = $scope.loja.password;
data.email = $scope.loja.email;
$http.post('http://localhost:8080/login/',data)
.success(function (data) {
console.log(data);
user.setProperty(data.nome);
$state.go('home');
})
.error(function (statusText) {
console.log("failed");
});
}
});
user service
app.service('user', function () {
var property = {};
return {
getProperty: function () {
return property.nome;
},
setProperty: function (value) {
property.nome = value;
}
};
});
You could just watch your service for changes by adding this code to your MainCtrl:
$scope.$watch(function () { return user.getProperty();}, updateProp, true);
function updateProp(newValue, oldValue) {
$scope.user = {
nome: newValue
};
}
updateProp gets executed everytime the value of user.getProperty() changes.
Your main issue is with your MainCtrl . In the initial execution of MainCtrl there is no value set into your service so its get blank. MainCtrl executes before setting the value in the service.
$scope.user = {
nome: user.getProperty()
};
this code should be executed after setting the value in the service but it executes in the initialization of controller.
You can get the reference from the fiddle below.
http://jsfiddle.net/ADukg/9799/

How can I access the function applied in success of an $http.post?

I have this function triggered when I click a button.
.controller('Formctrl', function($scope, ichrisLayoutLeavebalanceService){
$scope.listRowSelected = function (list, item) {
var det = { detnumber: item.detnumber };
ichrisLayoutLeavebalanceService.callPost(det).success(function (data){ ichrisLayoutLeavebalanceService.leaveBalanceProcess(); });
};
});
However, it seems like I can't access the leaveBalanceProcess(). It seems like only the factory part is enabled to be shared. Here's my controller and factory code that is access by the code above.
.directive(/*code... code...*/{/*code... long code...*/
/*code... code...*/},
controller : ($scope, ichrisLayoutLeavebalanceService) {
function par(){
//code... code...
}
$scope.leaveBalanceProcess = function (){/*codes... codes... */}
$scope.build = function () {
ichrisLayoutLeavebalanceService.callPost(par()).success(function (data) { $scope.leaveBalanceProcess(data) });
}
$scope.build();
}
})
.factory('ichrisLayoutLeavebalanceService', ['$http', function ($http) {
var leaveBalanceService = {};
leaveBalanceService.callPost = function (par) {
return $http.post('/api/values/entries/LeaveBalanceEntries', par);
}
return leaveBalanceService;
}]);
So now how can I acces the whole controller?

Architecture of single method for ajax in Angularjs

I'd like to understand how can i design single ajax-method for several controllers, which also can influence on user interface ('loading' animation, for example).
Idea is (without promises):
var myApp = angular.module('myApp', []);
myApp.controller('myCtrl',
function myCtrl($scope, myFactory){
$scope.loading = false;
$scope.someStuff = myFactory.getStuff(params);
});
myApp.factory('myFactory', function(myService){
return{
getStuff: function(params){
return myService.ajax(params);
}
}
});
myApp.service('myService', function($http) {
this.ajax = function(params){
// switch $scope.loading = true;
// make request
// return $http result
// switch $scope.loading = false;
};
});
As i know, i need use $scope for UI changes and ajax-method should be taken out to custom service. Services in Angularjs does not work with $scope and i have no idea how can i solve this problem.
I think, there must be a service with chain of promises.
How can it be designed?
Upd: I hope, with the time the documentation will be more complete and clear. But community of angular users is already great. Thanks.
In my project I have defined a service called appState which has (among other) methods: showGlobalSpinner and hideGlobalSpinner which modify a variable on the $rootScope.
Basically:
(…)
.factory('appState', ['$rootScope', function ($rootScope) {
return {
showGlobalSpinner: function () {
++$rootScope.loadingInProgress;
},
hideGlobalSpinner: function () {
if ($rootScope.loadingInProgress > 0) {
--$rootScope.loadingInProgress
}
}
};
}]);
What I do next is I show spinners wherever I need them using ng-show directive:
<div class="spinner" ng-show="loadingInProgress"></div>
Before each AJAX I just call AppState.showGlobalSpinner() and after success/error I call AppState.hideGlobalSpinner()
You could add this method to any of your controllers:
.controller('HeaderCtrl',['$scope','httpRequestTracker', function($scope,httpRequestTracker) {
$scope.hasPendingRequests = function () {
return httpRequestTracker.hasPendingRequests();
};
}]);
angular.module('services.httpRequestTracker', []);
angular.module('services.httpRequestTracker').factory('httpRequestTracker', ['$http', function($http){
var httpRequestTracker = {};
httpRequestTracker.hasPendingRequests = function() {
return $http.pendingRequests.length > 0;
};
return httpRequestTracker;
}]);
You can try a more generic approach by using an HTTP interceptor, some events and a directive:
Javascript
app.factory('myHttpInterceptor', function($q, $rootScope) {
return function(promise) {
$rootScope.$broadcast('RequestStarted');
var success = function(response) {
$rootScope.$broadcast('RequestFinished', true);
};
var error = function(response) {
$rootScope.$broadcast('RequestFinished', false);
return $q.reject(response);
};
promise.then(success, error);
return promise;
}
})
.config(function($httpProvider) {
$httpProvider.responseInterceptors.push('myHttpInterceptor');
})
.directive('loading', function() {
return {
restrict: 'E',
transclude: true,
template: '<div ng-show="visible" ng-transclude></div>',
controller: function($scope) {
$scope.visible = false;
$scope.$on('RequestStarted', function() {
$scope.visible = true;
});
$scope.$on('RequestFinished', function() {
$scope.visible = false;
});
}
};
});
HTML
...
<loading><h1>Loading...</h1></loading>
...
You can see a working demo here.
By using an HTTP interceptor, you'll be able to track every HTTP request made by the $http service ($resource included) across you Angular application and show the load animation accordingly.

binding data to angularjs from external model

I've got directive and service in my app (declared in separate files):
Service:
(function(){
angular.module('core', [])
.factory('api', function() {
return {
serviceField: 100
};
})
})();
Directive:
(function(){
angular.module('ui', ['core'])
.directive('apiFieldWatcher', function (api) {
return {
restrict: 'E',
replace: true,
scope: true,
template: '<div>+{{apiField}}+</div>',
controller: function($scope) {
$scope.apiField = 0;
},
link: function (scope) {
scope.$watch(function(){return api.serviceField}, function(apiFld){
scope.apiField = apiFld;
});
}
}
});
})();
And in another separate file I have native model:
function Model() { this.fld = 0; }
Model.prototype.setFld = function(a) { this.fld = a; }
Model.prototype.getFld = function() { return this.fld; }
How can I bind (two way) my native this.fld field to value in my AngularJS service?
The solution is in using this code:
Model.prototype.setFld = function(a) {
this.fld = a;
injector.invoke(['$rootScope', 'api', function($rootScope, api){
api.setField(a);
$rootScope.$digest();
}]);
};
Model.prototype.getFldFromApi = function() {
var self = this;
injector.invoke(['api', function(api){
self.fld = api.getField();
}]);
};
http://plnkr.co/edit/nitAVuOtzGsdJ49H4uyl
i think it's bad idea to use $digest on $rootScope, so we can maybe use
var scope = angular.element( elementObject ).scope();
to get needed scope and call $digest for it

Categories

Resources