/**
 * 数据库操作对象工厂
 * 
 * @export
 * @class OperaterFactory
 * @template P Operater类
 * @template M Model类
 */
export class OperaterFactory {

    private static _operaters: {
        [x: number]: any;
        [x: string]: any
    } = {};

    /**
     * 数据库操作对象
     * 
     * @template P 
     * @param {new () => P} Operater 
     * @returns {P} 
     * @memberof OperaterFactory
     */
    public static get<P extends IOperater<M>, M>(Operater: new () => P): P {
        if (!this._operaters[Operater.name]) {
            this._operaters[Operater.name] = new Operater();
        }
        return (this._operaters[Operater.name]) as P;
    }
}


/**
 * 操作接口
 * 
 * @export
 * @interface IOperater
 */
export interface IOperater<M> {
    create(model: M): Promise<M | undefined>
    update(id: string, value: { [attr: string]: any }): Promise<M | undefined>
    delete(id: string): Promise<Boolean>
    load(id: string): Promise<M | undefined>
    loads(options: { [x: string]: number | string | boolean }): Promise<M[]>
}