PARAM_NEXT = 'next'
PARAMETER_METHOD = 'method'


class DispatcherMixin:
    """
    This class contains a dispather method that can run a method specified by
    'method' request parameter.
    """

    def dispatch_method(self, *args, **kwargs):
        request = args[0]

        method_name = None
        if PARAMETER_METHOD in request.GET:
            method_name = request.GET[PARAMETER_METHOD]
        elif PARAMETER_METHOD in request.POST:
            method_name = request.POST[PARAMETER_METHOD]

        if method_name:
            return getattr(self, method_name)(*args, **kwargs)