+# Dictionary of table name => table class.
+# Need the table name so we can get the class from the table name after we
+# retrieve something from the index
+indexed_tables = {}
+for cls in [
+ tables.Ability,
+ tables.Item,
+ tables.Move,
+ tables.Pokemon,
+ tables.Type,
+ ]:
+ indexed_tables[cls.__tablename__] = cls
+
+# Dictionary of extra keys to file types of objects under, e.g. Pokémon can
+# also be looked up purely by number
+extra_keys = {
+ tables.Move: [
+ lambda row: u"move %d" % row.id,
+ ],
+ tables.Pokemon: [
+ lambda row: unicode(row.id),
+ ],
+}
+
+def open_index(directory=None, session=None, recreate=False):
+ """Opens the whoosh index stored in the named directory and returns (index,
+ speller). If the index doesn't already exist, it will be created.
+
+ `directory`
+ Directory containing the index. Defaults to a location within the
+ `pokedex` egg directory.
+
+ `session`
+ If the index needs to be created, this database session will be used.
+ Defaults to an attempt to connect to the default SQLite database
+ installed by `pokedex setup`.
+
+ `recreate`
+ If set to True, the whoosh index will be created even if it already
+ exists.
+ """
+
+ # Defaults
+ if not directory:
+ directory = pkg_resources.resource_filename('pokedex',
+ 'data/whoosh_index')
+
+ if not session:
+ session = connect()
+
+ # Attempt to open or create the index
+ directory_exists = os.path.exists(directory)
+ if directory_exists and not recreate:
+ # Already exists; should be an index!
+ try:
+ index = whoosh.index.open_dir(directory, indexname='pokedex')
+ speller = whoosh.index.open_dir(directory, indexname='spelling')
+ return index, speller
+ except whoosh.index.EmptyIndexError as e:
+ # Apparently not a real index. Fall out of the if and create it
+ pass
+
+ if not directory_exists:
+ os.mkdir(directory)
+
+
+ # Create index
+ schema = whoosh.fields.Schema(
+ name=whoosh.fields.ID(stored=True),
+ table=whoosh.fields.STORED,
+ row_id=whoosh.fields.STORED,
+ language=whoosh.fields.STORED,
+ )
+
+ index = whoosh.index.create_in(directory, schema=schema,
+ indexname='pokedex')
+ writer = index.writer()
+
+ # Index every name in all our tables of interest
+ speller_entries = []
+ for cls in indexed_tables.values():
+ q = session.query(cls)
+
+ # Only index base Pokémon formes
+ if hasattr(cls, 'forme_base_pokemon_id'):
+ q = q.filter_by(forme_base_pokemon_id=None)
+
+ for row in q.yield_per(5):
+ row_key = dict(table=cls.__tablename__, row_id=row.id)
+
+ # Spelling index only indexes strings of letters, alas, so we
+ # reduce every name to this to make the index work. However, exact
+ # matches are not returned, so e.g. 'nidoran' would neither match
+ # exactly nor fuzzy-match. Solution: add the spelling-munged name
+ # as a regular index row too.
+ name = row.name.lower()
+ writer.add_document(name=name, **row_key)
+
+ speller_entries.append(name)
+
+ for extra_key_func in extra_keys.get(cls, []):
+ extra_key = extra_key_func(row)
+ writer.add_document(name=extra_key, **row_key)
+
+ writer.commit()
+
+ # Construct and populate a spell-checker index. Quicker to do it all
+ # at once, as every call to add_* does a commit(), and those seem to be
+ # expensive
+ speller = whoosh.spelling.SpellChecker(index.storage, indexname='spelling')
+ speller.add_words(speller_entries)
+
+ return index, speller
+
+
+def lookup(name, session=None, exact_only=False):