71 lines
2.2 KiB
JavaScript
71 lines
2.2 KiB
JavaScript
import { getToken } from '../database/config.js';
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import { PriorityQueue } from './priority_queue.js';
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let busy = false; // lets us know if we are already sending api requests or not.
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let headers = undefined; // a file scope variable so that we only evaluate these once.
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let queue = new PriorityQueue(); // a priority queue to hold api calls we want to send, allows for throttling.
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// send takes a request object as argument and an optional context ctx
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// example request: {
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// endpoint: the url endpoint to call,
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// method: HTTP method for `fetch` call, defaults to 'GET',
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// payload: optional json object that will be send along with the request,
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// priority: optional priority value (defaults to 10, lower than 10 means the message will be sent faster)
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// }
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export function send(request, ctx) {
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return new Promise((resolve, reject) => {
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let data = {
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ctx: ctx,
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reject: reject,
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request: request,
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resolve: resolve,
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};
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if (!busy) {
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busy = true;
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send_this(data);
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} else {
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queue.enqueue(data, request.priority ? request.priority : 10);
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}
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});
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}
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function send_next() {
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if (queue.isEmpty()) {
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busy = false;
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} else {
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send_this(queue.dequeue().element);
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}
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}
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// send_this take a data object as argument built in the send function above
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function send_this(data) {
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if (headers === undefined) {
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const token = getToken();
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if (token === null) {
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throw 'Could not get token from the database. Did you init or register yet?';
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}
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headers = {
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'Content-Type': 'application/json',
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'Authorization': `Bearer ${token}`
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};
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}
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let options = {
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headers: headers,
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};
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if (data.request.method !== undefined) {
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options['method'] = data.request.method;
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}
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if (data.request.payload !== undefined) {
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options['body'] = JSON.stringify(data.request.payload);
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}
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fetch(`https://api.spacetraders.io/v2${data.request.endpoint}`, options)
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.then(response => response.json())
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.then(response => data.resolve(response))
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.catch(err => data.reject(err));
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setTimeout(send_next, 500);
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}
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export function debugLog(ctx) {
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console.log(`--- ${Date()} -----------------------------------------------------------------------------`);
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console.log(JSON.stringify(ctx, null, 2));
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}
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