#!/usr/bin/python2.5

#

# Copyright 2009 the Melange authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#   http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

"""Student Proposal (Model) query functions.

"""

__authors__ = [

  '"Lennard de Rijk" <ljvderijk@gmail.com>',

  ]

from soc.logic.models import base

from soc.logic.models import student as student_logic

from soc.logic.models.ranker_root import logic as ranker_root_logic

from soc.models import student_proposal

import soc.models.linkable

import soc.models.student_proposal

class Logic(base.Logic):

  """Logic methods for the Student Proposal model.

  """

  def __init__(self, model=soc.models.student_proposal.StudentProposal,

               base_model=soc.models.linkable.Linkable, 

               scope_logic=student_logic):

    """Defines the name, key_name and model for this entity.

    """

    super(Logic, self).__init__(model=model, base_model=base_model,

                                scope_logic=scope_logic)

  def _onCreate(self, entity):

    """Adds this proposal to the organization ranker entity.

    """

    fields = {'link_id': student_proposal.DEF_RANKER_NAME,

              'scope': entity.org}

    ranker_root = ranker_root_logic.getForFields(fields, unique=True)

    ranker = ranker_root_logic.getRootFromEntity(ranker_root) 

    ranker.SetScore(entity.key().name(), [entity.score])

    super(Logic, self)._onCreate(entity)

  def _updateField(self, entity, entity_properties, name):

    """Update the ranker if the score changes and keep the score within bounds.

    """

    value = entity_properties[name]

    if name == 'score':

      # keep the score within bounds

      min_score, max_score = student_proposal.DEF_SCORE

      value = max(min_score, min(value, max_score-1))

      entity_properties[name] = value

      # update the ranker

      fields = {'link_id': student_proposal.DEF_RANKER_NAME,

                'scope': entity.org}

      ranker_root = ranker_root_logic.getForFields(fields, unique=True)

      ranker = ranker_root_logic.getRootFromEntity(ranker_root)

      ranker.SetScore(entity.key().name(), [value])

    return super(Logic, self)._updateField(entity, entity_properties, name)

logic = Logic()