@corux/ask-extensions/dist/interceptors/LocalizationInterceptor.js

Extensions to improve development with Alexa Skills Kit SDK

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var i18next_1 = __importDefault(require("i18next"));
var i18next_sync_fs_backend_1 = __importDefault(require("i18next-sync-fs-backend"));
/**
 * Configures i18next and add the translation function to the handler input and request attributes.
 */
var LocalizationInterceptor = /** @class */ (function () {
    function LocalizationInterceptor(loadPath) {
        if (loadPath === void 0) { loadPath = "i18n/{{lng}}.json"; }
        this.loadPath = loadPath;
    }
    LocalizationInterceptor.prototype.process = function (handlerInput) {
        return __awaiter(this, void 0, void 0, function () {
            var _this = this;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0: return [4 /*yield*/, i18next_1.default
                            .use(i18next_sync_fs_backend_1.default)
                            .init({
                            backend: {
                                loadPath: this.loadPath,
                            },
                            defaultNS: "translation",
                            initImmediate: false,
                            lng: handlerInput.requestEnvelope.request.locale,
                            returnObjects: true,
                        }, function (err, t) {
                            var attributes = handlerInput.attributesManager.getRequestAttributes();
                            var tFunction = _this.randomTranslation(t);
                            attributes.t = tFunction;
                            handlerInput.t = tFunction;
                        })];
                    case 1:
                        _a.sent();
                        return [2 /*return*/];
                }
            });
        });
    };
    LocalizationInterceptor.prototype.randomTranslation = function (t) {
        return function (key, options) {
            var result = t(key, options);
            if (Array.isArray(result)) {
                return result[Math.floor(Math.random() * result.length)];
            }
            else {
                return result;
            }
        };
    };
    return LocalizationInterceptor;
}());
exports.LocalizationInterceptor = LocalizationInterceptor;
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