unleash.unleash/src/lib/features/feature-toggle/features-read-model.ts

import { Db } from '../../db/db';
import { IFeaturesReadModel } from './types/features-read-model-type';

export class FeaturesReadModel implements IFeaturesReadModel {
    private db: Db;

    constructor(db: Db) {
        this.db = db;
    }

    async featureExists(parent: string): Promise<boolean> {
        const rows = await this.db('features')
            .where('name', parent)
            .andWhere('archived_at', null)
            .select('name');

        return rows.length > 0;
    }

    async featuresInTheSameProject(
        featureA: string,
        featureB: string,
    ): Promise<boolean> {
        const rows = await this.db('features')
            .countDistinct('project as count')
            .whereIn('name', [featureA, featureB]);
        return Number(rows[0].count) === 1;
    }
}