lexica-dialog-facebook-messenger/dist/FacebookMiddleware.js

Facebook messenger plugin for Lexica virual agent

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const Constants_1 = require("./Constants");
const facebookMiddleware = async (context, next) => {
    const { serverContext, messenger, uniConfigs, logger } = context;
    if (messenger.name === Constants_1.MESSENGER_NAME) {
        let verifyToken;
        if (uniConfigs.has(Constants_1.CONFIG_FACEBOOK_VERIFY_TOKEN)) {
            verifyToken = uniConfigs.get(Constants_1.CONFIG_FACEBOOK_VERIFY_TOKEN)
                .value;
        }
        else {
            throw new Error("UNI Config not found: " + Constants_1.CONFIG_FACEBOOK_VERIFY_TOKEN);
        }
        if (serverContext.method === "GET" &&
            serverContext.query["hub.mode"] === "subscribe" &&
            serverContext.query["hub.verify_token"] === verifyToken) {
            serverContext.status = 200;
            serverContext.body = serverContext.query["hub.challenge"];
        }
        else if (serverContext.method === "POST") {
            const { rawRequest } = context;
            serverContext.status = 200;
            serverContext.body = "OK";
            next().catch(error => logger.error("Error catched by Facebook middleware", rawRequest, error));
        }
        else {
            await next();
        }
    }
    else {
        await next();
    }
};
exports.default = facebookMiddleware;
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