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-# line-dialogflow-adapter-firebase
+# Line-Dialogflow Adapter for Firebase Functions 
+
+Line-Dialogflow Adapter helps pass various events from [Line Bot](https://developers.line.me/en/docs/messaging-api/overview/)  to [Dialogflow](https://dialogflow.com/). Normally, the events such as [Follow event](https://developers.line.me/en/docs/messaging-api/reference/#follow-event) and [Postback event](https://developers.line.me/en/docs/messaging-api/reference/#postback-event) are not yet supported out-of-the-box by Dialogflow. Hence, the bot can exclusively send text query to get the response from Dialogflow. This code seeks to translate [Line webhook events](https://developers.line.me/en/docs/messaging-api/reference/#webhook-event-objects) to Dialogflow custom events.
+
+__*Note:__ This code will deploy the adapter on [Firebase Cloud Functions](https://firebase.google.com/docs/functions/)
+
+
+## Quickstart
+
+1. Create a bot in [Dialogflow](https://dialogflow.com/). Remember your `project-id` and `language`. No need to set up Integrations for Line.
+2. Enable the [Dialogflow API](https://console.cloud.google.com/flows/enableapi?apiid=dialogflow.googleapis.com) in Google Cloud console for your project.
+3. Initialize [Firebase](https://console.firebase.google.com/) project
+```
+cd line-dialogflow-adapter-firebase
+firebase init
+```
+and select your `project-id` to match your Dialogflow project.
+
+4. Obtain the channel access token of your Line bot from [Line Developer console](https://developers.line.me/console/).
+
+5. Set up the config with
+```
+firebase functions:config:set line.channel_access_token="your-channel-access-token" dialogflow.project_id="your-project-id" dialogflow.language_code="your-language"
+```
+6. Deploy the function with
+```
+firebase deploy --only functions
+```
+You should get the URL of your function as `https://us-central1-your-project-id.cloudfunctions.net/webhook` and the link will also show up at your Firebase Functions Dashboard.
+
+7. Go to the [Line Channel Setting](https://developers.line.me/console/) of your bot. 
+	- Enable webhook and add the Webhook URL to point to `https://us-central1-your-project-id.cloudfunctions.net/webhook`. 
+	- Disable Auto-reply messages and Greeting messages
+8. Go to Dialogflow console. For `Default Welcome Intent`, add `LINE_FOLLOW` event to greet your audience from Dialogflow!   
+
+## Line webhook event to Dialogflow event
+- __Message event__ is simply sent to Dialogflow as text. 
+- __Follow, Join, Beacon event__ are sent as custom Dialogflow events below:
+
+|  Line  |  Dialogflow |
+|:------:|:-----------:|
+| Follow | `LINE_FOLLOW` |
+|  Join  |  `LINE_JOIN`  |
+| Beacon | `LINE_BEACON` |
+
+- __Postback event__ are sent as `<EVENT_NAME>` to Dialogflow with all the followed parameters. The parameters may be used in the Dialogflow responses as `#your_event_name.param` (ie. `My store id is #your_event_name.storeid` will return `My store id is 1234` from the example below).
+```
+{  
+   "type":"postback",
+   "replyToken":"b60d432864f44d079f6d8efe86cf404b",
+   "source":{  
+      "userId":"U91eeaf62d...",
+      "type":"user"
+   },
+   "timestamp":1513669370317,
+   "postback":{  
+      "data":"action=<EVENT NAME>&storeid=1234",
+      "params":{  
+         "datetime":"2017-12-25T01:00"
+      }
+   }
+}
+```
+
+Feel free to customize the name of the predefined Dialogflow events and `<EVENT_NAME>` selector (default is `action`) in `config.ts`.
+
+### Documentation
+- [View Line webhook event](https://developers.line.me/en/docs/messaging-api/reference/#common-properties)
+- [View Dialogflow event](https://dialogflow.com/docs/events)