stocca-tre/server/Ingredient.ts

import { StoccaTreDbConn, WithoutId } from "./database.ts";

export type Ingredient = {
    id: number,
    name: string,
    displayName: string,
    displayNameDE: string,
};

export default class IngredientService {
    private dbConnection: StoccaTreDbConn;
    private mapById: Map<number, Ingredient> = new Map<number, Ingredient>();
    private allGotten = false;

    constructor(database: StoccaTreDbConn) {
        this.dbConnection = database;
    }

    async addIngredient(ingredient: WithoutId<Ingredient>): Promise<any> {
        const result = await this.dbConnection.query<any>(
            `INSERT INTO ingredients (id, name, displayName, displayNameDE) VALUES (NULL, '${ingredient.name}', '${ingredient.displayName}', '${ingredient.displayNameDE}');`
        );
        return result;
    }

    async getAllIngredients(): Promise<IterableIterator<Ingredient>> {
        if (!this.allGotten) {
            const result = await this.dbConnection.query<Ingredient[]>("SELECT * FROM ingredients");
            result.forEach((ingredient) => this.mapById.set(ingredient.id, ingredient));
            this.allGotten = true;
        }
        return this.mapById.values();
    }
}