Extending $resource of angularjs using IResourceClass of typescript

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眼角桃花
眼角桃花 2021-02-13 10:26

I am developing SPA using Asp.Net Web API and AngularJS. I also use TypeScript to get static typing. So, I added DefinitelyTyped angularjs.

As I am using RESTfull servic

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  • 2021-02-13 10:44

    I totally agree with Scott's answer: https://stackoverflow.com/a/21786326/2677975

    I do have one addition: In my project, I've create the class ServiceModel<T>, which implements the interface IActionDescriptor.

    module Common.ApiService {
        export class HttpHeaders {
            'Content-Type': string;
            Accept: string;
        }
    
        export class ServiceModel<T> implements ng.resource.IActionDescriptor {
            public method: string = 'GET';
            public params: T;
            public isArray: boolean = false;
            public url: string;
            public headers: HttpHeaders = new HttpHeaders()
        } 
    }
    

    Then, I can setup the method in my controller, just as Scott did, but now, the IDE will have type completion on the headers (and the params later on)

    export interface IProfileServiceResource extends ng.resource.IResourceClass<IProfileDataModelDef> {
        SaveProfileImage(profileImageUri: Profile.Model.UserProfileModel): ng.resource.IResource<Array<any>>;
    }
    
    export class ProfileApiService 
        implements Common.ApiService.IApiServiceBase<IProfileServiceResource> {
    
        public SaveProfileImage: Common.ApiService.ServiceModel<Profile.Model.UserProfileModel>;
    
        constructor() {    
            this.SaveProfileImage = new Common.ApiService.ServiceModel<Profile.Model.UserProfileModel>();
            this.SaveProfileImage.method = "POST";
            this.SaveProfileImage.url = "/api/Profile/SaveProfileImage";
            this.SaveProfileImage.headers["Content-Type"] = 'application/json';
    }
    

    I made this as an additional answer, since it only serves to provide types for the headers and the params.

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  • 2021-02-13 11:09

    First define your model, the interface that will describes your employee.

    // Define an interface of the object you want to use, providing it's properties
    interface IEmployee extends ng.resource.IResource<IEmployee>
    {
        id: number;
        firstName : string;
        lastName : string;
    }
    

    Then create an interface that describes the resource you will create.

    // Define your resource, adding the signature of the custom actions
    interface IEmployeeResource extends ng.resource.IResourceClass<IEmployee>
    {
        update(IEmployee) : IEmployee;
    }
    

    Create the EmployeeResource factory:

    var myApp = angular.module('myApp', ['ngResource']).factory('EmployeeResource', 
        ['$resource', ($resource : ng.resource.IResourceService) : IEmployeeResource => {
    
            // Define your custom actions here as IActionDescriptor
            var updateAction : ng.resource.IActionDescriptor = {
                method: 'PUT',
                isArray: false
            };
    
            // Return the resource, include your custom actions
            return <IEmployeeResource> $resource('/api/employee/:id', { id: '@id' }, {
                update: updateAction
            });
    
        }]);
    

    Inject your EmployeeResource into a controller:

    myApp.controller('TestCtrl', ['$scope', 'EmployeeResource', ($scope, Employee : IEmployeeResource) => 
    {
        // Get all employees
        var employees : Array<IEmployee> = Employee.query();
    
        // Get specific employee, and change their last name
        var employee : IEmployee = Employee.get({ id: 123 });
        employee.lastName = 'Smith';
        employee.$save();
    
        // Custom action
        var updatedEmployee : IEmployee = Employee.update({ id: 100, firstName: "John" });
    }]);
    

    Creating a new employee instance:

    You can create an instance of type IEmployee by newing the EmployeeResource factory.

    myApp.controller('TestCtrl', ['$scope', 'EmployeeResource', ($scope, Employee : IEmployeeResource) => 
    {
        var myEmployee : IEmployee = new Employee({ firstName: "John", lastName: "Smith"});
        myEmployee.$save();
    }
    

    So in the case above we inject our IEmployeeResource as Employee. We can then new this object to create an IEmployee.

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