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embed.mjs

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  • embed.mjs 2.87 KiB
    /**
     * Copyright schukai GmbH and contributors 2022. All Rights Reserved.
     * Node module: @schukai/monster
     * This file is licensed under the AGPLv3 License.
     * License text available at https://www.gnu.org/licenses/agpl-3.0.en.html
     */
    
    import {internalSymbol} from "../../constants.mjs";
    import {extend} from "../../data/extend.mjs";
    import { getGlobalObject} from "../../types/global.mjs";
    import {isString} from "../../types/is.mjs";
    import {validateObject, validateString} from "../../types/validate.mjs";
    import {parseLocale} from "../locale.mjs";
    import {Provider} from "../provider.mjs";
    import {Translations} from "../translations.mjs";
    
    export {Embed}
    
    /**
     * The Embed provider retrieves a JSON file from the given Script Tag.
     *
     * @externalExample ../../../example/i18n/providers/embed.mjs
     * @license AGPLv3
     * @since 1.13.0
     * @copyright schukai GmbH
     * @memberOf Monster.I18n.Providers
     * @see {@link https://datatracker.ietf.org/doc/html/rfc3066}
     * @tutorial i18n-locale-and-formatter
     */
    class Embed extends Provider {
    
        /**
         * ```html
         * <script id="translations" type="application/json">
         * {
         *     "hello": "Hallo"
         * }
         * </script>
         * ```
         * 
         * 
         * ```javascript
         * new Embed('translations')
         * ```
         *
         * @param {string} id
         * @param {Object} options
         */
        constructor(id, options) {
            super(options);
    
            if (options === undefined) {
                options = {};
            }
    
            validateString(id);
    
            /**
             * @property {string}
             */
            this.textId = id;
    
            /**
             * @private
             * @property {Object} options
             */
            this[internalSymbol] = extend({}, super.defaults, this.defaults, validateObject(options));
    
        }
    
        /**
         * Defaults
         *
         * @see {@link https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API}
         */
        get defaults() {
            return extend({}, super.defaults);
        }
    
        /**
         *
         * @param {Locale|string} locale
         * @return {Promise}
         */
        getTranslations(locale) {
    
            if (isString(locale)) {
                locale = parseLocale(locale);
            }
    
            return new Promise((resolve, reject) => {
    
                let text = getGlobalObject('document').getElementById(this.textId);
    
                if (text === null) {
                    reject(new Error('Text not found'));
                    return;
                }
    
                let translations = null;
                try {
                    translations = JSON.parse(text.innerHTML);
                } catch (e) {
                    reject(e);
                    return;
                }
    
    
                if (translations === null) {
                    reject(new Error('Translations not found or invalid'));
                    return;
                }
                
                const t = new Translations(locale);
                t.assignTranslations(translations)
    
                resolve(t);
    
            });
    
        }
    
    
    }