feature: Changes backend creation to use checks, and to automatically enable.

src/libs/backendInit.ts

@@ -0,0 +1,53 @@
+import type { PrismaClient } from "@prisma/client";
+
+import type { BackendBaseClass } from "../backendimpl/base.js";
+import { backendProviders } from "../backendimpl/index.js";
+
+type Backend = {
+  id: number;
+  name: string; 
+  description: string | null; 
+  backend: string; 
+  connectionDetails: string;
+};
+
+export async function backendInit(backend: Backend, backends: Record<number, BackendBaseClass>, prisma: PrismaClient): Promise<boolean> {
+  const ourProvider = backendProviders[backend.backend];
+  
+  if (!ourProvider) {
+    console.log(" - Error: Invalid backend recieved!");
+    return false;
+  }
+
+  console.log(" - Initializing backend...");
+
+  backends[backend.id] = new ourProvider(backend.connectionDetails);
+  const ourBackend = backends[backend.id];
+
+  if (!await ourBackend.start()) {
+    console.log(" - Error initializing backend!");
+    console.log("   - " + ourBackend.logs.join("\n   - "));
+
+    return false;
+  }
+
+  console.log(" - Initializing clients...");
+
+  const clients = await prisma.forwardRule.findMany({
+    where: {
+      destProviderID: backend.id,
+      enabled: true
+    }
+  });
+
+  for (const client of clients) {
+    if (client.protocol != "tcp" && client.protocol != "udp") {
+      console.error(` - Error: Client with ID of '${client.id}' has an invalid protocol! (must be either TCP or UDP)`);
+      continue;
+    }
+
+    ourBackend.addConnection(client.sourceIP, client.sourcePort, client.destPort, client.protocol);
+  }
+
+  return true;
+}