lib/puppet_webhook/parsers/payload.rb
# frozen_string_literal: true
module PuppetWebhook
class Parsers
# Main parser class used by the json and www_form_url_encoded parsers. This will
# parse json payloads from Verson Control Systems into usable fields for the Puppet
# Webhook service.
#
# @example
# request.body.rewind
# payload = PuppetWebhook::Parsers::Payload.new(request.env, request.body.read)
# payload.parse!
class Payload
# Public: Initialize the Payload object
#
# @param [Sinatra::Request] request Rack request object to be parsed
#
# @return [PuppetWebhook::Parsers::Payload]
def initialize(headers, body)
@headers = headers
@body = body
end
# Public: Parse the Rack request into a usable OpenStruct
# object.
#
# @return [OpenStruct]
def parse!
@vcs = detect_vcs
OpenStruct.new({
branch: branch,
deleted: deleted? || false,
module_name: repo_name.sub(%r{^.*-}, ''),
repo_name: repo_name,
repo_user: repo_user
}.delete_if { |_k, v| v.nil? })
end
private
# Private: Set the version control system
#
# @return [String]
def detect_vcs
return 'github' if github_webhook?
return 'gitlab' if gitlab_webhook?
return 'bitbucket-server' if bitbucket_server_webhook?
return 'bitbucket' if bitbucket_webhook?
return 'stash' if stash_webhook?
return 'tfs' if tfs_webhook?
raise StandardError, 'payload not recognised'
end
# Private: Check HTTP Headers for the Github event header
#
# @return [Boolean]
def github_webhook?
# https://developer.github.com/v3/activity/events/types/#pushevent
@headers.key?('HTTP_X_GITHUB_EVENT')
end
# Private: Check HTTP Headers for the Gitlab event Header
#
# @return [Boolean]
def gitlab_webhook?
# https://docs.gitlab.com/ce/user/project/integrations/webhooks.html
@headers.key?('HTTP_X_GITLAB_EVENT')
end
# Private: Checks for the BitBucket Server Event and Request ID http headers.
#
# @return [Boolean]
def bitbucket_server_webhook?
# https://confluence.atlassian.com/bitbucketserver/event-payload-938025882.html
@headers.key?('HTTP_X_EVENT_KEY') && @headers.key?('HTTP_X_REQUEST_ID')
end
# Private: Checks for the BitBucket.org Event and Hook UUID http headers.
#
# @return [Boolean]
def bitbucket_webhook?
# https://confluence.atlassian.com/bitbucket/event-payloads-740262817.html
@headers.key?('HTTP_X_EVENT_KEY') && @headers.key?('HTTP_X_HOOK_UUID')
end
# Private: Checks for the stash/bitbucket-server post receive hook plugin headers.
#
# @return [Boolean]
def stash_webhook?
# This payload is the `Web Post Hooks for Bitbucket Server` hook plugin.
# https://marketplace.atlassian.com/apps/1211539/web-post-hooks-for-bitbucket-server?hosting=server&tab=overview
# https://confluence.atlassian.com/bitbucketserver/post-service-webhook-for-bitbucket-server-776640367.html
@headers.key?('HTTP_X_ATLASSIAN_TOKEN')
end
# Private: Checks for the VSTS resource and eventType keys in the request body.
#
# @return [Boolean]
def tfs_webhook?
# https://docs.microsoft.com/en-us/vsts/service-hooks/services/webhooks
return false unless @data.key? 'resource'
return false unless @data.key? 'eventType'
true
end
# Private: Gets the name of the git branch from the request body.
#
# @return [String]
def branch
case @vcs
when 'github'
if @data.key? 'ref'
@data['ref'].sub('refs/heads/', '')
else
@data['repository']['default_branch']
end
when 'gitlab'
@data['ref'].sub('refs/heads/', '')
when 'bitbucket-server'
@data['changes'][0]['refId'].sub('refs/heads/', '')
when 'bitbucket'
return @data['push']['changes'][0]['new']['name'] unless deleted?
@data['push']['changes'][0]['old']['name']
when 'stash'
@data['refChanges'][0]['refId'].sub('refs/heads/', '')
when 'tfs'
@data['resource']['refUpdates'][0]['name'].sub('refs/heads/', '')
end
end
# Private: Determine if the branch has been deleted or not.
#
# @return [Boolean]
def deleted?
case @vcs
when 'github'
@data['deleted']
when 'gitlab'
@data['after'] == '0000000000000000000000000000000000000000'
when 'bitbucket-server'
@data['changes'][0]['type'] == 'DELETE'
when 'bitbucket'
@data['push']['changes'][0]['closed']
when 'stash'
@data['refChanges'][0]['type'] == 'DELETE'
when 'tfs'
@data['resource']['refUpdates'][0]['newObjectId'] == '0000000000000000000000000000000000000000'
end
end
# Private: Get the repository name
#
# @return [String]
def repo_name
if @vcs == 'gitlab'
@data['project']['name']
elsif @vcs == 'tfs'
@data['resource']['repository']['name']
else
@data['repository']['name']
end
end
# Private: Get the repository user from a Github or Gitlab repo.
#
# @return [String]
def repo_user
# TODO: Clarify what repo_user actually is.
# github is currently using the repo's 'owner', gitlab is using the user who pushed.
case @vcs
when 'github'
@data['repository']['owner']['login']
when 'gitlab'
@data['user_username']
end
# TODO: Bitbucket, Stash/Bitbucket Server, TFS
end
end
end
end