lexica-dialog-core/dist/middlewares/StartConversationMiddleware.js

Core server for Lexica dialog agent.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const lodash_1 = require("lodash");
const immutable_1 = require("immutable");
const Api_1 = require("../Api");
const Utils_1 = require("../Utils");
const startConversationMiddleware = async (context, next) => {
    try {
        await next();
    }
    catch (error) {
        const { sessionService, request, commands } = context;
        if (!lodash_1.isNil(sessionService) &&
            !lodash_1.isNil(request) &&
            error instanceof Api_1.BotError &&
            error.code === Api_1.BotErrorCode.MISSING_REQUIRED_FEATURE &&
            commands.size === 1) {
            const { locale } = request;
            const command = commands.first();
            const intent = command.intent;
            const features = command.features;
            const processedFeatures = command.processedFeatures;
            if (!lodash_1.isNil(intent) && !lodash_1.isNil(intent.missingFeatures)) {
                const missingFeatures = immutable_1.Map(intent.missingFeatures);
                if (sessionService.hasConversation()) {
                    sessionService.updateConversationFeatures(features);
                }
                else {
                    sessionService.startConversation(intent, features);
                }
                const highestPriority = missingFeatures
                    .filter((value, key) => !features.has(lodash_1.defaultTo(key, '')))
                    .toList()
                    .sort((a, b) => a.priority - b.priority)
                    .first();
                const responses = immutable_1.List(intent.responses.map(response => Utils_1.intentResponseToBotResponse(highestPriority.response, features, locale)));
                command.botResponses = immutable_1.List(responses.toArray().reduce((a, b) => a.concat(b), immutable_1.List()));
            }
            else {
                throw error;
            }
        }
        else {
            throw error;
        }
    }
};
exports.default = startConversationMiddleware;
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