Add Webex as an Alert Provider

[gdoctor]

I am happy to implement this myself based off the existing providers and open a PR if members of this community are okay with that.

[stefanprodan]

I thought Webex is like Zoom, video meetings only. Does it have chat channels like Slack?

[gdoctor]

Webex has a full chat client component that was called Webex Teams up until recently. I think they just brought it into the Webex suite and now it is being branded as Webex for messaging; it is essentially a chat client similar to Slack. For reference: https://www.webex.com/team-collaboration.html

Edit: I was thinking of using this plugin to implement the feature in a simple manner. The generic alert provider does not work simply because it does not populate the text field required by this plugin. - https://apphub.webex.com/messaging/applications/incoming-webhooks-cisco-systems-38054

[phillebaba]

The only issue I see with implementing this feature would be testing and debugging issues.

[gdoctor]

I understand your concerns, but Webex has free tier accounts that should have complete access to the messaging components just like MSTeams. I am happy to implement and test and attach all pertinent screenshots.

[gdoctor]

I added support for Webex on my end, and I am using the image for my notification-controller deployment currently. Before I open a PR here. I want to make sure the flux developers are okay with the content of the message and formatting of it. I initially wanted to use an Adaptive Card like the MSTeams integration, but Webex does not support Adaptive Cards via the Incoming Webhook integration yet so I am left with markdown options. Also, I couldn't get json to look very good on webex.

The screenshot is directly from the Webex client. Let me know what you think @stefanprodan @phillebaba

[gdoctor]

This is what the full json looks like. The user scrolls to the right to see the rest of the message.

[phillebaba]

Just so that I understand the screenshots correctly, will the user see the formatted text or the JSON? I think that even if Webex is not totally identical to the other providers it should use the same format in the messages.

[gdoctor]

Sorry my messages were not clear. I provided 2 separate options for what the user could see. The first one is a format that I thought would be good. The second is what the user would see if I instead sent json. I prefer the first option.

[gdoctor]

This screenshot is an updated version of the first option that also includes the metadata, which other providers were supplying.

[phillebaba]

Considering the limitations of webex I think this formatting should be fine. Go ahead and create a PR and I will review it. Thanks for the hard work 💪