I am working on a Node Js (TypeScript) architecture and for some reason, I want to bind my interface to a specific object. I am making a general class that is extended by other subclasses and it will have a very general code. So my code looks like
interface User {
name: string;
}
interface Profile {
title: string;
}
class Parent {
name: string;
interface: Interface; // Help required here, getting error can't use type as a variable
constructor( name, interface ) {
// Load schema and store here
this.name = name
this.interface = interface
}
// Though this is not correct I hope you get the idea of what I am trying to do
get (): this.interface {
// fetch the data and return
return data
}
set (data: this.interface): void {
// adding new data
}
}
class UserSchema extends Parent {
// Class with custom functions for UserSchema
}
class ProfileSchema extends Parent {
// Class with custom functions for ProfileSchema
}
// Config file that saves the configs for different modules
const moduleConfig = [
{
name: "User Module",
class: UserSchema,
interface: User
},
{
name: "Profile Module",
class: ProfileSchema,
interface: Profile
},
]
const allModules = {}
// Loading the modules
moduleConfig.map(config => {
allModules[config.name] = new config.class(
config.name,
config.interface
)
})
export allModules;
I need suggestions on how should I bind my interfaces with their respective configs. Till now I have had no luck with that.
PS: All this code is separated into their respective files.
This is the use case for generics. You can even see them as "variable for types".
Instead of having an interface property in your Parent class, the latter would have a generic type:
class Parent<T> { // T is the generic type
name: string;
// interface: Interface; // generic is already provided at class level
constructor( name ) {
// Load schema and store here
this.name = name
}
get (): T {
// fetch the data and return
return data
}
set (data: T): void {
// adding new data
}
}
// Here you specify the concrete generic type
class UserSchema extends Parent<User> {
// Class with custom functions for UserSchema
}
class ProfileSchema extends Parent<Profile> {
// Class with custom functions for ProfileSchema
}