add user creation in db & validation

api/src/lib/user-auth.ts

@@ -0,0 +1,70 @@
+import { getDbContext } from "../db/client";
+import { Context } from "hono";
+import { UserSelect } from "../types/user";
+import { user } from "../db/schema";
+import { like } from "drizzle-orm";
+import { DrizzleD1Database } from "drizzle-orm/d1";
+import { MissingMailError, UserInactiveError } from "../types/error";
+
+/**
+ * Returns the details of a user from the given context
+ * @param c Request context
+ * @returns Object of the user details as type UserSelect
+ */
+export async function getUser(c: Context): Promise<UserSelect>{
+    const db = getDbContext(c);
+    const auth = c.get('authUser');
+    if(!auth.session.user || !auth.session.user.email) throw new MissingMailError();
+
+    const currentUser: UserSelect = c.get('currentUser');
+    if(currentUser) return currentUser;
+
+    const mail = auth.session.user.email;
+
+    let userData: UserSelect[];
+    try{
+        userData = await db.selectDistinct().from(user).limit(1).where(like(user.mail, mail));
+
+    }
+    catch(e){
+        throw new Error(`Database error: ${e}`);
+    }
+
+    const dbResult = userData[0] ?? await createUser(db, mail);
+    if(!dbResult.isActive) throw new UserInactiveError();
+
+    c.set('currentUser', dbResult);
+    return dbResult;
+}
+
+/**
+ * Creates a new user in the DB from the given context
+ * @param c Request context
+ * @returns The created user as Object of type UserSelect
+ */
+async function createUser(db: DrizzleD1Database, userMail: string): Promise<UserSelect>{
+    let userData: UserSelect[];
+
+    try{
+        userData = await db.insert(user).values(
+            {
+                mail: userMail,
+                isActive: true,
+                createdAt: now(),
+                lastActive: now()
+            }
+        ).returning();
+
+    }
+    catch(e){
+        throw new Error(`Database error: ${e}`);
+    }
+
+    return userData[0];
+}
+
+/**
+ * Getting the current time
+ * @returns Current unix timestamp
+ */
+const now = () => Math.floor(Date.now() / 1000);