Create a callback for links and other attachments

[byrnereese]

In my bot I have implemented unfurling. This is accomplished by scanning every incoming message for links, iterating over them, and then posting adaptive cards. What if this process could be abstracted?

The framework could throw an event "LinkAdded" whose handler would look like this

const handleLinks = async event => {
    const { group, bot, urls } = event
    for (url of urls) {
        // do stuff for url
    }
}

The point is: make it easier for developers to process links. The same could also be said for any type of message:

• events
• tasks
• notes
• code snippets
• and so forth

[byrnereese]

Another requirement... the framework when extracting URLs should be able to ignore URLs that are included in a response.

Imagine a user sends a URL in a message, then another responds to that message by quoting it. The first URL should be unfurled, but the second URL (really a duplicate of the first) should be ignore.