initial commit, boilerplate stuff

api/middleware/error.ts

@@ -0,0 +1,37 @@
+import { Context, Next } from "@oak/oak";
+
+import { APIErrorCode, APIException, APIFailure } from "../model/interfaces.ts";
+
+export async function errorMiddleware(ctx: Context, next: Next) {
+  try {
+    await next();
+  } catch (err) {
+    if (err instanceof APIException) {
+      const responseBody: APIFailure = {
+        success: false,
+        error: {
+          code: err.code,
+          message: err.message,
+        },
+      };
+
+      ctx.response.status = err.status;
+      ctx.response.body = responseBody;
+
+      console.log(responseBody);
+    } else {
+      console.error(err);
+
+      const responseBody: APIFailure = {
+        success: false,
+        error: {
+          code: APIErrorCode.SERVER_ERROR,
+          message: "Unexpected server error",
+        },
+      };
+
+      ctx.response.status = 500;
+      ctx.response.body = responseBody;
+    }
+  }
+}