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# frozen_string_literal: true
module PagerDuty
class WebhookPayloadParser
SCHEMA_PATH = Rails.root.join('lib', 'pager_duty', 'validator', 'schemas', 'message.json')
def initialize(payload)
@payload = payload
end
def self.call(payload)
new(payload).call
end
def call
Array(payload['messages']).map { |msg| parse_message(msg) }.reject(&:empty?)
end
private
attr_reader :payload
def parse_message(message)
return {} unless valid_message?(message)
{
'event' => message['event'],
'incident' => parse_incident(message['incident'])
}
end
def parse_incident(incident)
{
'url' => incident['html_url'],
'incident_number' => incident['incident_number'],
'title' => incident['title'],
'status' => incident['status'],
'created_at' => incident['created_at'],
'urgency' => incident['urgency'],
'incident_key' => incident['incident_key'],
'assignees' => reject_empty(parse_assignees(incident)),
'impacted_services' => reject_empty(parse_impacted_services(incident))
}
end
def parse_assignees(incident)
Array(incident['assignments']).map do |a|
{
'summary' => a.dig('assignee', 'summary'),
'url' => a.dig('assignee', 'html_url')
}
end
end
def parse_impacted_services(incident)
Array(incident['impacted_services']).map do |is|
{
'summary' => is['summary'],
'url' => is['html_url']
}
end
end
def reject_empty(entities)
Array(entities).reject { |e| e['summary'].blank? && e['url'].blank? }
end
def valid_message?(message)
::JSONSchemer.schema(SCHEMA_PATH).valid?(message)
end
end
end
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