yoanm / alfred-personal-assistant

const logger = require('./logger');

const NestedError = require('nested-error-stacks');

/**

 * Represent the bot which can speak and listen to you

 */

class Alfred {

    /**

     * @public

     *

     * @param {Client}        client

     * @param {PluginManager} pluginManager

     */

    /**

     * @public

     *

     * @param {string} textToSpeech

     *

     * @returns {Promise.<null|Error>}

     */

    speak(textToSpeech) {

        if (this.initialized === false) {

            return Promise.reject(new Error('Alfred not initialized'));

        }

        return this.pluginManager.decorateTts(textToSpeech)

            .then(textToSpeech => this.client.speak(textToSpeech))

            .then(() => null)

            .catch(error => {

                const newError = new NestedError('Alfred::speak error', error);

                this.logError(newError);

                return Promise.reject(newError);

            })

        ;

    }

    /**

     * @public

     * Politely wake up Alfred before asking him something.

     *

     * He will wake up each of his leprechauns

     *

     * @returns {Promise.<null|Error>}

     */

    wakeUp() {

        logger.starting('Alfred');

        return this.pluginManager.init()

            .then(() => this.client.listen())

            .then(() => {

                this.initialized = true;

            })

            .then(() => this.speak('A votre écoute'))

            .then(() => logger.started('Alfred'))

            .then(() => null)

            .catch(error => {

                const newError = new NestedError('Alfred::wakeUp error', error);

                this.logError(newError);

                return Promise.reject(newError);

            })

        ;

    }

    sleep() {

        if (this.initialized === false) {

            return Promise.resolve();

        }

        const updateState = () => {

            this.initialized = false;

        };

        logger.stopping('Alfred');

        return this.speak('A votre service')

            .then(() => this.pluginManager.dispose())

            .then(() => this.client.stopListening())

            .then(updateState)

            .then(() => logger.stopped('Alfred'))

            .catch(error => {

                const newError = new NestedError('Alfred::sleep error', error);

                this.logError(newError);

                updateState();

                return Promise.reject(newError);

            })

        ;

    }

    /**

     * @private

     * @param {Error} error

     *

     * @returns {Error}

     */

    logError(error) {

        this.logger.error(`${error.message}`);

    }

}

module.exports = Alfred;