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module API
module APIHelpers
def current_user
@current_user ||= User.find_by_authentication_token(params[:private_token] || env["HTTP_PRIVATE_TOKEN"])
end
def user_project
@project ||= find_project(params[:id])
@project || not_found!
end
def find_project(id)
project = Project.find_by_id(id) || Project.find_with_namespace(id)
if project && can?(current_user, :read_project, project)
project
else
nil
end
end
def paginate(object)
object.page(params[:page]).per(params[:per_page].to_i)
end
def authenticate!
unauthorized! unless current_user
end
def authenticated_as_admin!
forbidden! unless current_user.is_admin?
end
def authorize! action, subject
unless abilities.allowed?(current_user, action, subject)
forbidden!
end
end
def can?(object, action, subject)
abilities.allowed?(object, action, subject)
end
# Checks the occurrences of required attributes, each attribute must be present in the params hash
# or a Bad Request error is invoked.
#
# Parameters:
# keys (required) - A hash consisting of keys that must be present
def required_attributes!(keys)
keys.each do |key|
bad_request!(key) unless params[key].present?
end
end
def attributes_for_keys(keys)
attrs = {}
keys.each do |key|
attrs[key] = params[key] if params[key].present?
end
attrs
end
# error helpers
def forbidden!
render_api_error!('403 Forbidden', 403)
end
def bad_request!(attribute)
message = ["400 (Bad request)"]
message << "\"" + attribute.to_s + "\" not given"
render_api_error!(message.join(' '), 400)
end
def not_found!(resource = nil)
message = ["404"]
message << resource if resource
message << "Not Found"
render_api_error!(message.join(' '), 404)
end
def unauthorized!
render_api_error!('401 Unauthorized', 401)
end
def not_allowed!
render_api_error!('Method Not Allowed', 405)
end
def render_api_error!(message, status)
error!({'message' => message}, status)
end
private
def abilities
@abilities ||= begin
abilities = Six.new
abilities << Ability
abilities
end
end
end
end
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