Bitbucket Server: Webhooks

[mickmister]

When the plugin receives a webhook event from Bitbucket, we parse the HTTP body into data structures defined by the plugin. We’ll need to be able to differentiate between the two different webhook event structures from the two Bitbucket systems.

https://github.com/mattermost/mattermost-plugin-bitbucket/blob/84a4030b48eb91683d9038ba35afacc9ec9e8f92/server/webhookpayload/bitbucket.go#L83
The Webhook.Parse method does most of the logic of parsing the incoming webhook request. Having this method be the defining factor as the WebhookUnmarshaler interface makes sense.

The following webhook event types are currently supported by the plugin:

https://github.com/mattermost/mattermost-plugin-bitbucket/blob/84a4030b48eb91683d9038ba35afacc9ec9e8f92/server/webhook.go#L35

• RepoPushEvent
• IssueCreatedEvent
• IssueUpdatedEvent
• IssueCommentCreatedEvent
• PullRequestCreatedEvent
• PullRequestUpdatedEvent
• PullRequestApprovedEvent
• PullRequestUnapprovedEvent
• PullRequestDeclinedEvent
• PullRequestMergedEvent
• PullRequestCommentCreatedEvent

They are implemented in the link below. Only the ones in the above list need to be implemented. The rest can be removed from the code linked below.
https://github.com/mattermost/mattermost-plugin-bitbucket/blob/84a4030b48eb91683d9038ba35afacc9ec9e8f92/server/webhookpayload/bitbucket.go#L129

Ticket Link

Epic ticket #6