feat: implementing server framework

server/database.ts

@@ -1,16 +1,40 @@
 import { Client } from "https://deno.land/x/mysql/mod.ts";
-import dbconfig from "./config.json" assert { type: "json" };
+import config from "@/config.json" assert { type: "json" };
 
 export type WithoutId<T> = Omit<T, "id">;
 export interface StoccaTreDbConn {
-    query<T>(query: string): Promise<T>;
+    query<T>(query: string): Promise<Maybe<T>>;
 }
 export default async function createNewDbConnection(): Promise<StoccaTreDbConn> {
-    return await new Client().connect({
-        hostname: dbconfig.hostname,
-        username: dbconfig.username,
+    const mysqlClient = await new Client().connect({
+        hostname: config.hostname,
+        username: config.username,
         db: "stocca_tre",
-        password: dbconfig.password,
+        password: config.password,
     });
+    return {
+        query: async <T>(query: string): Promise<Maybe<T>> => {
+            let errMessage: string;
+            try {
+                const result = await mysqlClient.query(query);
+                return {
+                    just: result as T,
+                    error: null,
+                };
+            } catch (e: unknown) {
+                if (e && typeof (e as { message?: any }).message === "string") {
+                    errMessage = (e as { message: string}).message;
+                } else {
+                    errMessage = "An unknown error occurred in the database.";
+                }
+            }
+            return {
+                just: null,
+                error: {
+                    message: errMessage
+                },
+            };
+        }
+    }
 }