@anglr/rest
Version:
Angular module representing rest services
49 lines • 2.19 kB
JavaScript
import { Observable } from 'rxjs';
import { ParamsDataIterator } from '../misc/classes/paramsData.iterator';
import { handleQueryParam } from '../misc/utils';
/**
* Middleware that is used for adding query string parameters
*/
export class QueryParameterMiddleware {
//######################### public static properties #########################
/**
* String identification of middleware
*/
static { this.id = 'QueryParameterMiddleware'; }
//######################### public methods - implementation of RestMiddleware #########################
/**
* Runs code that is defined for this rest middleware, in this method you can modify request and response
* @param this - Method is bound to RESTClient
* @param id - Unique id that identifies request method
* @param target - Prototype of class that are decorators applied to
* @param methodName - Name of method that is being modified
* @param descriptor - Descriptor of method that is being modified
* @param args - Array of arguments passed to called method
* @param request - Http request that you can modify
* @param next - Used for calling next middleware with modified request
*/
run(_id, target, methodName, _descriptor, args, request, next) {
return new Observable(observer => {
(async () => {
const parameters = target.parameters;
let pQuery;
let pTransforms;
if (parameters) {
pQuery = parameters[methodName]?.query;
pTransforms = parameters[methodName]?.transforms;
}
if (pQuery) {
const params = {};
for (const data of new ParamsDataIterator(pQuery, pTransforms, args, this)) {
await handleQueryParam(data, params, args);
}
request = request.clone({
setParams: params
});
}
return next(request).subscribe(observer);
})();
});
}
}
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