refactor

backend/api/src/validators.ts

@@ -0,0 +1,36 @@
+import {CustomValidator} from "express-validator";
+import {UserRepository} from "./repositories/UserRepository.js";
+import {UserPgPromiseRepository} from "./repositories/pgPromise/UserPgPromiseRepository.js";
+
+export const USERNAME_VALIDATION_REGEX: string = '[a-zA-Z0-9_.\\- ]*';
+export const TIME_VALIDATION_REGEX: string = '([0-5]\\d:)?[0-5]\\d:[0-5]\\d';
+
+/**
+ * Custom express-validator to ensure that the user with given ID exists
+ * @param userId
+ */
+export const userWithIdExists: CustomValidator = userId => {
+    try {
+        const userRepo: UserRepository = new UserPgPromiseRepository;
+        return userRepo.withIdExists(userId).then(exists => {
+            if (!exists) return Promise.reject("User does not exist");
+        });
+    } catch (error) {
+        console.log(error);
+    }
+}
+
+/**
+ * Custom express-validator to ensure that the user with given name does not exist yet
+ * @param username
+ */
+export const userWithNameDoesNotExists: CustomValidator = username => {
+    try {
+        const userRepo: UserRepository = new UserPgPromiseRepository;
+        return userRepo.withNameExists(username).then(exists => {
+            if (exists) return Promise.reject("User with given name already exists");
+        });
+    } catch (error) {
+        console.log(error);
+    }
+}