"""Components to help cataloging and searching objects.
"""
import grok
from grok import index
from hurry.query import Eq
from hurry.query.interfaces import IQuery
from hurry.query.query import Query
from zope.catalog.catalog import ResultSet
from zope.component import getUtility
from zope.intid.interfaces import IIntIds

from waeup.sirp.app import University
from waeup.sirp.interfaces import IQueryResultItem
from waeup.sirp.student.interfaces import IStudent

class WAeUPQuery(Query):
     """A hurry.query-like query that supports also ``apply``.
     """
     grok.implements(IQuery)

     def apply(self, query):
          """Get a catalog's BTree set of intids conforming to a query.
          """
          return query.apply()

     def searchResults(self, query):
          """Get a set of ZODB objects conforming to a query.
          """
          results = self.apply(query)
          if results is not None:
               uidutil = getUtility(IIntIds)
               results = ResultSet(results, uidutil)
          return results

grok.global_utility(WAeUPQuery)


class StudentIndexes(grok.Indexes):
     grok.site(University)
     grok.name('students_catalog')
     grok.context(IStudent)

     name = grok.index.Field(attribute='name')

class QueryResultItem(object):
     grok.implements(IQueryResultItem)
     url = None
     title = None
     description = None
     
     def __init__(self, context, view):
          self.context = context
          self.url = view.url(context)
          self.title = context.title
          self.description = ''

def search_context(query):
     result = Query().searchResults(
          Eq(('students_catalog', 'name'), query)
          )
     return result