KeyValueSource Interface

Represents a generic, writable key-value source with methods for getting, setting, removing, and observing values associated with a specific key. It also includes a method to destroy the source, allowing for cleanup when it is no longer needed

@template T = any
The type of the values stored in the key-value source. Defaults to any

API


interface KeyValueSource<T = any> {
  get(key: string): T;
  set(key: string, value: T): void;
  remove(key: string): void;
  observe(key: string): Observable<T>;
  destroy(): void;
}

Example


class ExampleSource<T = any> implements KeyValueSource<T> {
  private data: Index<T> = {};
  private readonly subject = new Subject<string>();
  
  get(key: string): T {
    return this.data[key];
  }
  
  set(key: string, value: T): void {
    this.data[key] = value;
    this.subject.next(key);
  }
  
  remove(key: string): void {
    delete this.data[key];
    this.subject.next(key);
  }
  
  observe(key: string): Observable<T> {
    return this.subject.pipe(
      filter(eKey => key === eKey),
      map(key => this.get(key)),
    );
  }
  
  destroy(): void {
    this.data = {};
  }
}