Switch api.ai to dialogflow (#25)

* Switch api.ai to dialogflow
* Cleanup

.env.example

@@ -1,5 +1,7 @@
 NODE_ENV=development
 PORT=4040
 WSURL=http://localhost:4040
-APIAI_CLIENT_TOKEN=YOUR_API_AI_CLIENT_ACCESS_TOKEN
 GOOGLE_API_KEY=YOUR_GOOGLE_TIMEZONE_API_TOKEN
+GOOGLE_APPLICATION_CREDENTIALS_PKEY="-----BEGIN PRIVATE KEY-----\...YOUR...\n...PKEY...\n-----END PRIVATE KEY-----\n"
+GOOGLE_APPLICATION_CREDENTIALS_CLIENT_EMAIL=[email protected]
+DIALOGFLOW_PROJECT_ID=YOUR_PROJECT_ID

README.md

@@ -9,17 +9,17 @@ A simple bot app which enables users to ask about the current date and time, cal
 
 ## Requirements
 
-The app is built using [Angular](https://angular.io/) on the front end, [Express](https://expressjs.com/) on the back end, and [API.AI](https://api.ai/)'s API to process and understand natural language.
+The app is built using [Angular](https://angular.io/) on the front end, [Express](https://expressjs.com/) on the back end, and ~~[API.AI](https://api.ai/)'s API~~ [Dialogflow](https://cloud.google.com/dialogflow/) to process and understand natural language.
 
 You will need:
 - [Node.js](https://nodejs.org/en/), and [npm](https://docs.npmjs.com/getting-started/installing-node) or [Yarn](https://yarnpkg.com/en/)
-- [API.AI account](https://console.api.ai/api-client/#/login)
+- ~~[API.AI account](https://console.api.ai/api-client/#/login)~~ [Google Cloud account](https://console.cloud.google.com/), and [setup it up to start using Dialogflow](https://cloud.google.com/dialogflow/es/docs/quick/setup)
 
 You will also need [Google Maps API](https://developers.google.com/maps/get-started/) key, as we'll use some of their APIs to get data related to locations and timezones, specifically:
 - The [Google Maps Geocoding API](https://developers.google.com/maps/documentation/geocoding/start) — to get location related data
 - The [Google Time Zone API](https://developers.google.com/maps/documentation/timezone/intro) — to get location's timezone data.
 
-Once you've created your [API.AI account](https://console.api.ai/api-client/#/login) go ahead and create your [Agent](https://api.ai/docs/agents). Then, in your created Agent, import the [intents](./data/intents) and [entities](./data/entities) used in this example.
+Once you've created your ~~[API.AI account](https://console.api.ai/api-client/#/login)~~ [Google Cloud account](https://console.cloud.google.com/) go ahead and create your [Agent](https://cloud.google.com/dialogflow/es/docs/quick/build-agent). Then, in your created Agent, import the [intents](./data/intents) and [entities](./data/entities) used in this example.
 
 ## Getting Started
 

client/src/app/app.component.ts

@@ -68,7 +68,7 @@ export class AppComponent implements OnInit, OnDestroy {
       tz: this.timezone
     };
 
-    this.ws$.next(JSON.stringify(input));
+    this.ws$.next(input);
     this.pushMsg(input, true);
     this.botIsTyping = true;
   }