from flask.ext.login import current_user
from flask.ext.restless import ProcessingException

url_prefix = '/api/v3'

def auth_func(*args, **kw):
    if not current_user.is_authenticated:
        raise ProcessingException(description='Not authenticated!', code=401)

class AbstractProcessor():

    def is_authorized_to_modify(self, user, obj):
        return user.id == obj.user_id

    def get_single_preprocessor(self, instance_id=None, **kw):
        # Check if the user is authorized to modify the specified
        # instance of the model.
        pass

    def get_many_preprocessor(self, search_params=None, **kw):
        """Accepts a single argument, `search_params`, which is a dictionary
        containing the search parameters for the request.
        """
        filt = dict(name="user_id",
                    op="eq",
                    val=current_user.id)

        # Check if there are any filters there already.
        if "filters" not in search_params:
          search_params["filters"] = []

        search_params["filters"].append(filt)