refactor: Migrate from NextJs's API routes to Hono based routes for the API (#1432)

* Setup Hono and migrate the highlights API there

* Implement the tags and lists endpoint

* Implement the bookmarks and users endpoints

* Add the trpc error code adapter

* Remove the old nextjs handlers

* fix api key not found handling

* Fix trpc error handling

* Fix 204 handling

* Fix search ordering

* Implement the singlefile endpoint

* Implement the asset serving endpoints

* Implement webauth

* Add hono as a catch all route under api

* fix tests

2 files changed, 63 insertions, 0 deletions

diff --git a/packages/api/middlewares/auth.ts b/packages/api/middlewares/auth.ts
new file mode 100644
index 00000000..7f39a6f9
--- /dev/null
+++ b/packages/api/middlewares/auth.ts
@@ -0,0 +1,22 @@
+import { createMiddleware } from "hono/factory";
+import { HTTPException } from "hono/http-exception";
+
+import { AuthedContext, createCallerFactory } from "@karakeep/trpc";
+import { appRouter } from "@karakeep/trpc/routers/_app";
+
+const createCaller = createCallerFactory(appRouter);
+
+export const authMiddleware = createMiddleware<{
+  Variables: {
+    ctx: AuthedContext;
+    api: ReturnType<typeof createCaller>;
+  };
+}>(async (c, next) => {
+  if (!c.var.ctx || !c.var.ctx.user || c.var.ctx.user === null) {
+    throw new HTTPException(401, {
+      message: "Unauthorized",
+    });
+  }
+  c.set("api", createCaller(c.get("ctx")));
+  await next();
+});
diff --git a/packages/api/middlewares/trpcAdapter.ts b/packages/api/middlewares/trpcAdapter.ts
new file mode 100644
index 00000000..6bb4a790
--- /dev/null
+++ b/packages/api/middlewares/trpcAdapter.ts
@@ -0,0 +1,41 @@
+import { TRPCError } from "@trpc/server";
+import { createMiddleware } from "hono/factory";
+import { HTTPException } from "hono/http-exception";
+
+function trpcCodeToHttpCode(code: TRPCError["code"]) {
+  switch (code) {
+    case "BAD_REQUEST":
+    case "PARSE_ERROR":
+      return 400;
+    case "UNAUTHORIZED":
+      return 401;
+    case "FORBIDDEN":
+      return 403;
+    case "NOT_FOUND":
+      return 404;
+    case "METHOD_NOT_SUPPORTED":
+      return 405;
+    case "TIMEOUT":
+      return 408;
+    case "PAYLOAD_TOO_LARGE":
+      return 413;
+    case "INTERNAL_SERVER_ERROR":
+      return 500;
+    default:
+      return 500;
+  }
+}
+
+const trpcAdapter = createMiddleware(async (c, next) => {
+  await next();
+  const e = c.error;
+  if (e instanceof TRPCError) {
+    const code = trpcCodeToHttpCode(e.code);
+    throw new HTTPException(code, {
+      message: e.message,
+      cause: e.cause,
+    });
+  }
+});
+
+export default trpcAdapter;