added traefik config provider endpoint

server/traefik-config-provider/index.ts

@@ -0,0 +1,70 @@
+import { Request, Response } from "express";
+import db from "@server/db";
+import * as schema from "@server/db/schema";
+import { DynamicTraefikConfig } from "./configSchema";
+import { like } from "drizzle-orm";
+import logger from "@server/logger";
+
+export async function traefikConfigProvider(_: Request, res: Response) {
+    try {
+        const targets = await getAllTargets();
+        const traefikConfig = buildTraefikConfig(targets);
+        res.status(200).send(traefikConfig);
+    } catch (e) {
+        logger.error(`Failed to build traefik config: ${e}`);
+        res.status(500).send({ message: "Failed to build traefik config" });
+    }
+}
+
+export function buildTraefikConfig(
+    targets: schema.Target[],
+): DynamicTraefikConfig {
+    const middlewareName = "gerbil";
+
+    const http: DynamicTraefikConfig["http"] = {
+        routers: {},
+        services: {},
+        middlewares: {
+            [middlewareName]: {
+                plugin: {
+                    [middlewareName]: {
+                        // These are temporary values
+                        APIEndpoint:
+                            "http://host.docker.internal:3001/api/v1/gerbil",
+                        ValidToken: "abc123",
+                    },
+                },
+            },
+        },
+    };
+
+    for (const target of targets) {
+        const routerName = `router-${target.targetId}`;
+        const serviceName = `service-${target.targetId}`;
+
+        http.routers[routerName] = {
+            entryPoints: [target.method],
+            middlewares: [middlewareName],
+            service: serviceName,
+            rule: `Host(\`${target.resourceId}\`)`, // assuming resourceId is a valid full hostname
+        };
+
+        http.services[serviceName] = {
+            loadBalancer: {
+                servers: [
+                    { url: `${target.method}://${target.ip}:${target.port}` },
+                ],
+            },
+        };
+    }
+
+    return { http } as DynamicTraefikConfig;
+}
+
+export async function getAllTargets(): Promise<schema.Target[]> {
+    const all = await db
+        .select()
+        .from(schema.targets)
+        .where(like(schema.targets.resourceId, "%.%")); // any resourceId with a dot is a valid hostname; otherwise it's a UUID placeholder
+    return all;
+}