Merge pull request 'f052_admin_area' (#27) from f052_admin_area into development

Reviewed-on: #27

src/lib/server/userService.ts

@@ -0,0 +1,51 @@
+import { db } from '$lib/server/dbService';
+
+export const getUsers = (): { userId: string; userName: string }[] => {
+	const getUsersSQLStmt = `SELECT id, name
+													 FROM users;`;
+	const statement = db.prepare(getUsersSQLStmt);
+	const result = statement.all() as { id: string; name: string }[];
+	const userList: { userId: string; userName: string }[] = [];
+
+	for (const resultItem of result) {
+		const user = { userId: resultItem.id, userName: resultItem.name };
+		userList.push(user);
+	}
+
+	return userList;
+};
+
+export const addUser = (userName: string, userPassword: string) => {
+	const addUserSQLStmt = `INSERT into users(name, pw)
+													values (?, ?)`;
+	const statement = db.prepare(addUserSQLStmt);
+
+	let rowInfo;
+	try {
+		rowInfo = statement.run(userName, userPassword);
+		return rowInfo;
+	} catch (error) {
+		console.error('ERROR: ', error);
+	}
+};
+
+export const deleteUser = (userId: string) => {
+	// make sure to not delete the last entry
+	const deleteUserSQLStmt = `DELETE
+														 FROM users
+														 WHERE id = ?
+															 AND (SELECT COUNT(*) FROM users) > 1;`;
+
+	const statement = db.prepare(deleteUserSQLStmt);
+
+	let rowCount;
+	try {
+		const info = statement.run(userId);
+		rowCount = info.changes;
+	} catch (error) {
+		console.log(error);
+		rowCount = 0;
+	}
+
+	return rowCount;
+};