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−#!/usr/bin/python2.5
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−#
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−# Copyright 2009 the Melange authors.
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−#
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−# Licensed under the Apache License, Version 2.0 (the "License");
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−# you may not use this file except in compliance with the License.
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−# You may obtain a copy of the License at
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−#
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−#   http://www.apache.org/licenses/LICENSE-2.0
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−#
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−# Unless required by applicable law or agreed to in writing, software
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−# distributed under the License is distributed on an "AS IS" BASIS,
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−# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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−# See the License for the specific language governing permissions and
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−# limitations under the License.
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−
+
−"""Student Proposal (Model) query functions.
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−"""
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−
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−__authors__ = [
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−  '"Lennard de Rijk" <ljvderijk@gmail.com>',
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−  ]
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−
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−
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−from soc.logic.models import base
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−from soc.logic.models import student as student_logic
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−from soc.models import student_proposal
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−
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−import soc.models.linkable
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−import soc.models.student_proposal
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−
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−
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−class Logic(base.Logic):
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−  """Logic methods for the Student Proposal model.
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−  """
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−
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−  def __init__(self, model=soc.models.student_proposal.StudentProposal,
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−               base_model=soc.models.linkable.Linkable, 
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−               scope_logic=student_logic):
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−    """Defines the name, key_name and model for this entity.
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−    """
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−
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−    super(Logic, self).__init__(model=model, base_model=base_model,
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−                                scope_logic=scope_logic)
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−
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−
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−  def getRankerFor(self, entity):
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−    """Returns the ranker for the given Student Proposal.
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−
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−    Args:
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−      entity: Student Proposal entity for which the ranker should be returned
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−
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−    Returns:
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−      Ranker object which is used to rank the given entity
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−    """
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−
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−    from soc.logic.models.ranker_root import logic as ranker_root_logic
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−
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−    fields = {'link_id': student_proposal.DEF_RANKER_NAME,
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−        'scope': entity.org}
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−
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−    ranker_root = ranker_root_logic.getForFields(fields, unique=True)
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−    ranker = ranker_root_logic.getRootFromEntity(ranker_root)
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−
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−    return ranker
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−
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−  def _onCreate(self, entity):
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−    """Adds this proposal to the organization ranker entity.
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−    """
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−
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−    ranker = self.getRankerFor(entity)
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−    ranker.SetScore(entity.key().name(), [entity.score])
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−
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−    super(Logic, self)._onCreate(entity)
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−
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−  def _updateField(self, entity, entity_properties, name):
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−    """Called when the fields of the student_proposal are updated.
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−
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−      - Update the ranker if the score changes and keep the score within bounds
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−      - Remove the entity from the ranker when the status changes to invalid or rejected
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−    """
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−
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−    value = entity_properties[name]
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−
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−    if name == 'score':
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−      # keep the score within bounds
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−      min_score, max_score = student_proposal.DEF_SCORE
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−
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−      value = max(min_score, min(value, max_score-1))
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−      entity_properties[name] = value
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−
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−      # update the ranker
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−      ranker = self.getRankerFor(entity)
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−      ranker.SetScore(entity.key().name(), [value])
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−
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−    if name == 'status':
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−
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−      if value in ['invalid', 'rejected'] and entity.status != value:
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−        # the proposal is going into invalid or rejected state
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−        # remove the score from the ranker
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−        ranker = self.getRankerFor(entity)
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−
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−        # entries in the ranker can be removed by setting the score to None
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−        ranker.SetScore(entity.key().name(), None)
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−
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−    return super(Logic, self)._updateField(entity, entity_properties, name)
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−
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−
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−logic = Logic()