Create your own facebook messenger 💬 assistant which understand polish 🇵🇱 language.
Go to https://developers.facebook.com/ and sign with your Facebook credentials. Click Get Started button and follow instructions to Add a New App.
After your app is created, go to Dashboard tab on the menu left. Find messenger and click Set Up. Firstly you have to "Create a new page".
This will take you to facebook.com where you have to create your facebook page. Choose Community or public figure.
Once you have your page created go back to Facebook Developer Portal and refresh page. You should find Token Generation module. Select your page and generate your page access token.
Go to https://dialogflow.com/ and sign in with your google credentials. Click on Go to console to create your first agent. Click Create Agent and fill in the details. Give your Agent a name. It can be the same name as your Facebook Page.
When your agent is created, it will automatically add two Intents. Click on Default Welcome Intent to edit it
In the Events section, add the event FACEBOOK_WELCOME. This enables your bot to recognize user when he interacts with the bot for the first time.
Scroll down the page and delete the default responses by clicking the trash icon, as we will be responding to the user from our code.
Scroll down further and enable Fulfillment. This makes sure that all requests are routed through our chatbot function
Next, we need to connect the Facebook Messenger to Dialogflow. Click on Integrations.
Turn on Messenger Integration. This will open a modal window. You need to enter two things here. First is the Verify Token which can be any text and second is the Page Access Token.
Switch to the Facebook Developer Portal and copy the Page Access Token. Paste the Page Access Token in Dialogflow modal window and enter your Verify Token. Click on START button to start the integration. Now click on the clipboard icon to copy the Callback URL.
Now switch to Facebook Developer Portal. It’s time to setup the Webhooks integration. Select Setup Webhooks found below the Token Generation section. Paste the URL you copied into the Callback URL field and enter your Verify Token you specified in the previous step. Tick all Subscription Fields.
Click on Verify and Save and if you’ve setup everything correctly, you should see a green tick with Complete. Now select your page name from the dropdown and click on Subscribe.
There are a couple more things that you need to complete the setup. Go to Settings > Basic and add a Privacy Policy URL and choose a Category for your app. The Privacy Policy URL can be any valid URL (e.g. https://google.com/).
Save changes and Toggle the status button On to make your app go live.
Deploy your app (e.g. https://heroku.com). Add your facebook Page Access Token to your server environment variable.
export ACCESS_TOKEN="<your_page_access_token>"Now we should point our app in Dialogflow setup. Switch to Dialogflow and click on Fulfillment and turn on the Webhook.
Append the copied URL with /webhook path and click on SAVE at the bottom of the page.
Your webhook URL should look like:
https://your-app-host/webhook
We are almost done. All we need to do now, is to enable our bot on the Facebook Developer Portal. Go to your Facebook page and click on Add a Button. Choose Send Message, complete the details and save.