50 lines
1.6 KiB
TypeScript
50 lines
1.6 KiB
TypeScript
import { runMiddleware } from './runMiddleware';
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import { Application } from 'express';
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import { assignIn } from 'lodash';
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export interface ICallOptions {
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method: "post",
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headers?: { 'Content-Type': 'application/json' },
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body: {
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[index: string]: any
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}
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}
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/**
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* Function that will generate an async accessor Function.
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* @param app the provided Express App.
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*/
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export function getBackendAccesors(app: Application){
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// Create a Run-Middle-Ware
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runMiddleware(app);
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// Define a apiCall Function, which could be used to perform internal
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// Request on the API.
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function apiCall<T>(url: string, options: ICallOptions){
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return new Promise<T>((resolve, reject) => {
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// Define the Default Options
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const defaults: Partial<ICallOptions> = {
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headers: { 'Content-Type': 'application/json' }
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}
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// Mix the Options.
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const opts: ICallOptions = assignIn(defaults, options);
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// Perform the Call
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(app as any).runMiddleware(url,opts,(responseCode: number,body: T) => {
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// Based on the Response code, decide whether the call was a Fail or not.
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if (responseCode === 200){
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// If everything is fine,
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// Just return the body.
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return resolve(body);
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} else {
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const error = new Error('Call Ended with responseCode = ' + responseCode.toString());
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return reject(error)
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}
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})
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})
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}
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return apiCall;
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} |