mbroersen / jeloquent

/**

 *

 */

export default class HasManyThrough extends Relation {

    localKey: string;

    throughModel: ModelStaticInterface;

    private _lcModelClassName: string;

    private _lcParentClassName: string;

    private _lcThroughModelClassName: string;

    constructor(model: ModelStaticInterface, throughModel: ModelStaticInterface, foreignKey: string, localKey: string) {

        super(model, foreignKey);

        this.model = model;

        this.throughModel = throughModel;

        this.localKey = localKey ?? 'id';

    }

    get indexName(): string {

        return `${this._lcThroughModelClassName}.${this._lcParentClassName}_id`;

    }

    get originalValue(): Collection {

        return this.getValueByParentKey('originalPrimaryKey');

    }

    get value(): Collection {

        return this.getValueByParentKey('primaryKey');

    }

    getRelationalFields():Array<ForeignKey> {

        return [];

    }

    setName() {

        this._lcThroughModelClassName = this.throughModel.snakeCaseClassName;

        this._lcModelClassName = this.model.snakeCaseClassName;

        this._lcParentClassName = this.$parent.snakeCaseClassName;

        this.foreignKey = `${this._lcThroughModelClassName}_id`;

        this.$name = `${this._lcModelClassName}s`;

        return this;

    }

    tableSetup() {

        this.model.registerIndex(this.indexName);

    }

    private getValueByParentKey(parentProperty: string): Collection {

        const keyIndex = this.model.getIndexByKey(this.indexName);

        return globalThis.Store.database().find(this.model.className,

            [...(keyIndex.get(this.$parent[parentProperty])?.values()) ?? []]

}