dataorm/src/models/index.ts

A Javascript ORM

import { Database } from '../database';
import { Subject } from '../observer/Subject';

class Model extends Subject {
  public static get() {
    return Subject;
  }

  public static find(id: any) {
    const instance: any = new this();

    const db1 = Database.getInstance();

    const collection: any[] = db1.collection(instance['entity']);

    const result = collection.find((item: any) => item.id === id);

    return result ?? null;
  }

  public static create(entity: any) {
    const instance: any = new this();

    const db1 = Database.getInstance();

    const collection: any[] = db1.collection(instance['entity']);

    if (
      entity.hasOwnProperty('id') &&
      collection.find(item => item.id === entity['id'])
    ) {
      throw new Error('Duplicate id');
    }

    entity['id'] = entity.hasOwnProperty('id')
      ? entity['id']
      : collection.length + 1;

    collection.push(entity);

    db1.setCollection(instance['entity'], collection);

    this.fire(collection);

    return entity ?? null;
  }

  public hasMany(relation: any) {
    return relation;
  }

  public belongsTo(relation: any) {
    return relation;
  }
}

export { Model };