module Honeybadger::Util::RequestHash

def self.extract_cgi_data(request)
  request.env.each_with_object({}) do |(k,v), env|
    next unless k.is_a?(String)
    next unless k.start_with?(HTTP_HEADER_PREFIX) || CGI_WHITELIST.include?(k)
    env[k] = v
  end
end

def self.extract_params(request)
  (request.env['action_dispatch.request.parameters'] || request.params).to_hash || {}
rescue => e
  { error: "Failed to access params -- #{e}" }
end

def self.extract_session(request)
  request.session.to_hash
rescue => e
  # Rails raises ArgumentError when `config.secret_token` is missing, and
  # ActionDispatch::Session::SessionRestoreError when the session can't be
  # restored.
  { error: "Failed to access session data -- #{e}" }
end

def self.extract_url(request)
  request.env['honeybadger.request.url'] || request.url
rescue => e
  "Failed to access URL -- #{e}"
end

def self.from_env(env)
  return {} unless defined?(::Rack::Request)
  return {} unless env
  hash, request = {}, ::Rack::Request.new(env.dup)
  hash[:url] = extract_url(request)
  hash[:params] = extract_params(request)
  hash[:component] = hash[:params]['controller']
  hash[:action] = hash[:params]['action']
  hash[:session] = extract_session(request)
  hash[:cgi_data] = extract_cgi_data(request)
  hash
end