blog-generics-class.ts

interface DatabaseConnector {
  get: Function;
  put: Function;
}

abstract class BaseLocalDatabase<T, M> {
  
  tableName: String;
  databaseInstance: DatabaseConnector;
  
  constructor(tableName: String) {
    this.tableName = tableName;
    this.databaseInstance = getDatabase<T>(tableName);
  }
  
  async insert(data: M): Promise<void> {
    await this.databaseInstance.put(data);
  }

  async get(id: Number): Promise<M> {
    return await this.databaseInstance.get(id);
  }

  abstract getFormattedData(): Array<M>;
}