86 lines
2.4 KiB
TypeScript
86 lines
2.4 KiB
TypeScript
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import { System } from "./runtime";
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import { EndpointHook } from "./types";
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import express from "express";
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export type EndpointRequest = {
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method: string;
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path: string;
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query: { [key: string]: string };
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headers: { [key: string]: string };
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body: any;
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};
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export type EndpointResponse = {
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status: number;
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headers?: { [key: string]: string };
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body: any;
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};
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const endPointPrefix = "/_";
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export function exposeSystem(system: System<EndpointHook>) {
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return (
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req: express.Request,
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res: express.Response,
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next: express.NextFunction
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) => {
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if (!req.path.startsWith(endPointPrefix)) {
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return next();
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}
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Promise.resolve()
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.then(async () => {
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for (const [plugName, plug] of system.loadedPlugs.entries()) {
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const manifest = plug.manifest;
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if (!manifest) {
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continue;
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}
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const endpoints = manifest.hooks?.endpoints;
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if (endpoints) {
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let prefix = `${endPointPrefix}/${plugName}`;
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if (!req.path.startsWith(prefix)) {
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continue;
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}
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for (const { path, method, handler } of endpoints) {
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let prefixedPath = `${prefix}${path}`;
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if (prefixedPath === req.path && method === req.method) {
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try {
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const response: EndpointResponse = await plug.invoke(
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handler,
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[
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{
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path: req.path,
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method: req.method,
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body: req.body,
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query: req.query,
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headers: req.headers,
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} as EndpointRequest,
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]
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);
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let resp = res.status(response.status);
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if (response.headers) {
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for (const [key, value] of Object.entries(
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response.headers
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)) {
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resp = resp.header(key, value);
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}
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}
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resp.send(response.body);
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return;
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} catch (e: any) {
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console.error("Error executing function", e);
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res.status(500).send(e.message);
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return;
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}
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}
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}
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}
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}
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next();
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})
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.catch((e) => {
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console.error(e);
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next(e);
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});
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};
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}
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