[FEATURE] Messenger Channel - support "Account Linking"

[maksym-plotnikov]

Problem: Currently I'm working on implementation of Facebook Messenger Account Linking - Account Linking Overview. We implemented all needed functionality on both sides (Bot and 3rd-party API) and configure account_linking webhook. Everything works but I didn't get response from Facebook at Botpress webhook. I've started to investigate and found out that inside botpress/modules/channel-messenger/src/backend/messenger.ts -> _handleIncomingMessage method You handle only 2 basic cases - message and postback. But there are lot of other webhook events inside Messenger API and they could have no nor message either postback keys. For example Account Linking Webhook event has another structure: Docs. So currently I did a "monkey-patch" of "messenger-module' inside /modules/.cache with next code: ... } else if (webhookEvent.account_linking) { await this._sendEvent(bot.botId, senderId, webhookEvent.account_linking, { type: 'account_linking }); } ... Possible solution Best case: Add support for all webhook events and pass them inside middleware / dialog engines: Webhooks Reference - List of Webhook Events Minimum case: Add support for Account Linking Webhook

Proposal If You guys have low capacity or another priorities right now - please let me know here. I will try to do a PR :-)

P.S. I'm with You since "botpress": "1.x" and really appreciated for all hard work You did @slvnperron and the team!

[maksym-plotnikov]

@EFF @slvnperron Maybe You guys can find a minute to check this issue?

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[davidvitora]

Not relevant on 12.30.x