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#! /usr/bin/env python
#-*- coding: utf-8 -*-
# pyAggr3g470r - A Web based news aggregator.
# Copyright (C) 2010-2013 Cédric Bonhomme - http://cedricbonhomme.org/
#
# For more information : https://bitbucket.org/cedricbonhomme/pyaggr3g470r/
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
__author__ = "Cedric Bonhomme"
__version__ = "$Revision: 0.3 $"
__date__ = "$Date: 2013/06/24 $"
__revision__ = "$Date: 2013/11/10 $"
__copyright__ = "Copyright (c) Cedric Bonhomme"
__license__ = "GPLv3"
import os
from whoosh.index import create_in, open_dir
from whoosh.index import EmptyIndexError
from whoosh.fields import *
from whoosh.query import *
from whoosh.qparser import QueryParser
from whoosh.writing import AsyncWriter
from collections import defaultdict
import utils
import models
indexdir = "./pyaggr3g470r/var/indexdir"
schema = Schema(title=TEXT(stored=True), \
content=TEXT, \
article_id=TEXT(stored=True), \
feed_id=TEXT(stored=True))
def create_index(feeds):
"""
Creates the index.
"""
if not os.path.exists(indexdir):
os.makedirs(indexdir)
ix = create_in(indexdir, schema)
writer = ix.writer()
for feed in feeds:
for article in feed.articles:
writer.add_document(title=article.title, \
content=utils.clear_string(article.content), \
article_id=str(article.id).decode(), \
feed_id=str(feed.oid).decode())
writer.commit()
def add_to_index(articles, feed):
"""
Add a list of articles to the index.
Here an AsyncWriter is used because the function will
be called in multiple threads by the feedgetter module.
"""
try:
ix = open_dir(indexdir)
except (EmptyIndexError, OSError) as e:
if not os.path.exists(indexdir):
os.makedirs(indexdir)
ix = create_in(indexdir, schema)
writer = AsyncWriter(ix)
for article in articles:
writer.add_document(title=article.title, \
content=utils.clear_string(article.content), \
article_id=str(article.id).decode(), \
feed_id=str(feed.oid).decode())
writer.commit()
def delete_article(feed_id, article_id):
"""
Delete an article from the index.
"""
try:
ix = open_dir(indexdir)
except (EmptyIndexError, OSError) as e:
raise EmptyIndexError
writer = ix.writer()
document = And([Term("feed_id", feed_id), Term("article_id", article_id)])
writer.delete_by_query(document)
writer.commit()
def search(term):
"""
Search for `term` in the index.
Returns a list of articles.
"""
result_dict = defaultdict(list)
try:
ix = open_dir(indexdir)
except (EmptyIndexError, OSError) as e:
raise EmptyIndexError
with ix.searcher() as searcher:
query = QueryParser("content", ix.schema).parse(term)
results = searcher.search(query, limit=None)
for article in results:
result_dict[article["feed_id"]].append(article["article_id"])
return result_dict, len(results)
def nb_documents():
"""
Return the number of undeleted documents.
"""
try:
ix = open_dir(indexdir)
except (EmptyIndexError, OSError) as e:
raise EmptyIndexError
return ix.doc_count()
if __name__ == "__main__":
# Point of entry in execution mode.
#create_index()
print(nb_documents())
results = search("Nothomb")
for article in results:
print(article)
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