Could someone guide me through the Angular code?

Question

Could someone guide me through the Angular code?

webApp.factory('userAPIService', ['$resource',
function ($resource) {

    return $resource(
        "/api/reportconfig/:Id",

        {Id: "@Id" },
        {
            // This section allows for changing methods from GET to POST and DELETE as needed
            "update": {method: "PUT"},
            "getreport": {'method': 'GET', 'params': {  Id:'getReportbyReportID', expire: 'true', cache:'false'}, isArray: true},
            "createreport": {'method': 'GET', 'params': { Id:'createreport', expire: 'true', cache:'false'}},
            "listreport": {'method': 'GET', 'params': { Id:'listreport', expire: 'true', cache:'false'}, isArray: true},//require user_uuid
            "deletereport": {'method': 'GET', 'params': { Id:'deletereport', expire: 'true', cache:'false'}}
        }
    );
}]);

When the above code is executed, it can be called using this command

userAPIService.createreport({
                'report_config_json': report_config_json, topic_uuid: topic.uuid, report_id: reportID, user_id:userid }, {'Id': 'createreport'})

I'm struggling to comprehend what the userAPIService actually provides when invoked - does it return an object? And how are arguments managed and passed when calling userAPIService.createreport?

javascript ajax angularjs

Answer 1

Answer №1

After reviewing the limited information provided, I believe I have a grasp on what is happening in your code:

It seems you are creating a factory, similar to a service but with multiple instances instead of a singleton. When you use the userAPIService factory, you receive a function back that could act like a constructor. It appears that you initialize a local variable 'userAPIService' with the results of calling userAPIService().

At this point, you have an instance of userAPIService serving as a data retrieval service (not to be confused with an Angular Service, which is a singleton).

Calling userAPIService.createreport() will initially return an empty object or array and then make an $http call to the specified URL and Method from the $resource definition to retrieve the desired data. Once the request is complete, it populates the reference with the actual data.

Examining the custom action defined in $resource for .createreport(), we see:

"createreport": {'method': 'GET', 'params': { Id:'createreport', expire: 'true', cache:'false'}}

This line tells $resource how to handle requests using createreport(). It indicates that a GET request will be made to the URL with default values specified unless overridden during the method call.

When making the method call, you pass two objects to override default parameters and set headers for the $http request initiated by $resource.

For further details, I recommend reading the documentation at https://docs.angularjs.org/api/ngResource/service/$resource

Answer 2

After reviewing the limited information provided, I believe I have a grasp on what is happening in your code:

It seems you are creating a factory, similar to a service but with multiple instances instead of a singleton. When you use the userAPIService factory, you receive a function back that could act like a constructor. It appears that you initialize a local variable 'userAPIService' with the results of calling userAPIService().

At this point, you have an instance of userAPIService serving as a data retrieval service (not to be confused with an Angular Service, which is a singleton).

Calling userAPIService.createreport() will initially return an empty object or array and then make an $http call to the specified URL and Method from the $resource definition to retrieve the desired data. Once the request is complete, it populates the reference with the actual data.

Examining the custom action defined in $resource for .createreport(), we see:

"createreport": {'method': 'GET', 'params': { Id:'createreport', expire: 'true', cache:'false'}}

This line tells $resource how to handle requests using createreport(). It indicates that a GET request will be made to the URL with default values specified unless overridden during the method call.

When making the method call, you pass two objects to override default parameters and set headers for the $http request initiated by $resource.

For further details, I recommend reading the documentation at https://docs.angularjs.org/api/ngResource/service/$resource

Could someone guide me through the Angular code?

Answer №1

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