How are one-time notifications implemented in large projects?

Question

Database

Hey!
The question is simple, but its correct implementation is interesting.
A client registers on the site and a pop-up with a short instruction is shown to him, because he logged into the account for the very first time. Then a similar notification that we have a discount on premium accounts (we tell about this once to each client).
And here's the question - how to control / store such "one-time" situations?
In a DB to create for them the separate table with descriptions and to set a flag? Is it correct then that every time after logging into the account you need to check if the pop-up has already been called. And the fact that it needs to be checked every time when I visit page X?
Plus, the types of events can be different - the first is a pop-up window, the second is a button that appears in the header, and the third is an email that is sent only once after I performed a separate action.
How to separate all this and not get confused, so that later you can also add to the list of these notifications?

Answer 1

if a certain order is traced in the messages, then you can have an additional integer type field in the user table, for example stage, and display messages. Regarding prem, it's probably a separate logic. Since there is a table with payment data, etc. And there is a separate component that stores the logic of connecting all this and forming a message.

Answer 2

What you described is nothing more than a task-list of an automatic manager that serves all accounts (throughout the entire period of their existence).
1. A table of all tasks (task-list) is compiled for one account (standard). As needed - the pool can change: added, edited or completely changed.
2. When creating a new account, these tasks are assigned to the auto-manager, in relation to a new account, counting from the account activation period.
3. When a user logs in, the auto-manager takes a task from the pool, and if there is something to execute, it executes: a tour of the interface, notification of innovations, etc.