import {get} from "./http";

/**
 * An object that defines a dictionary
 *
 * A dictionary contains the dictionary JSON file url and an object, the keys
 * of which are unique string IDs, and the values are the strings, translated
 * into the language of the dictionary
 */
export class Dictionary {

    public constructor(url: string, strings: { [id: string]: string } = {}) {
        this.url = url;
        this.strings = strings;
    }

    /**
     * Dictionary JSON-file URL
     */
    public url: string;

    /**
     * Dictionary strings with IDs
     *
     * The keys in this object are the unique string ID, whereas the values are the translated strings themselves
     */
    public strings: { [id: string]: string };

    /**
     * Returns true if a string with certain ID exists in the dictionary
     *
     * @param id - the string ID
     */
    public hasString(id: string): boolean {
        return this.strings.hasOwnProperty(id);
    }

    /**
     * Loads the dictionary from it's URL and stores the {@link strings}
     *
     * @param cb - an optional callback to be executed after loading is finished
     */
    public load(cb?: Function): void {
        get(this.url, (r: string): void => {
            this.strings = JSON.parse(r);
            if (cb) cb();
        })
    }
}