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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# create index
import codecs
import os
from subprocess import Popen, PIPE, STDOUT
import re
import sys
import config
input_xml_file_name = config.input_xml_file_name
def normalize_title(title):
return title.strip().replace(' ', '_').capitalize()
class RedirectParser:
def __init__(self, file_name):
self.link_re = re.compile('\[\[.*?\]\]')
# Load redirects
input_redirects = codecs.open('%s.redirects_used' % file_name,
encoding='utf-8', mode='r')
line = input_redirects.readline()
self.redirects = {}
count = 0
while line:
links = links = self.link_re.findall(unicode(line))
if len(links) == 2:
self.redirects[normalize_title(links[0])] = \
normalize_title(links[1])
line = input_redirects.readline()
count += 1
print "Processing %d\r" % count,
input_redirects.close()
def get_redirected(self, article_title):
try:
article_title = article_title.capitalize()
redirected = self.redirects[article_title]
except:
redirect = None
return redirect
class DataRetriever():
def __init__(self, data_files_base, redirects_checker):
self._bzip_file_name = '%s.processed.bz2' % data_files_base
self._bzip_table_file_name = '%s.processed.bz2t' % data_files_base
self._index_file_name = '%s.processed.idx' % data_files_base
self.template_re = re.compile('({{.*?}})')
self.redirects_checker = redirects_checker
def _get_article_position(self, article_title):
article_title = normalize_title(article_title)
#index_file = codecs.open(self._index_file_name, encoding='utf-8',
# mode='r')
index_file = open(self._index_file_name, mode='r')
index_line = index_file.readline()
num_block = -1
position = -1
while index_line:
words = index_line.split()
article = words[0]
if article == article_title:
num_block = int(words[1])
position = int(words[2])
break
index_line = index_file.readline()
index_file.close()
if num_block == -1:
# look at redirects
redirect = self.redirects_checker.get_redirected(article_title)
if redirect is not None:
return self._get_article_position(redirect)
return num_block, position
def _get_block_start(self, num_block):
bzip_table_file = open(self._bzip_table_file_name, mode='r')
n = num_block
table_line = ''
while n > 0:
table_line = bzip_table_file.readline()
n -= 1
if table_line == '':
return -1
parts = table_line.split()
block_start = int(parts[0])
bzip_table_file.close()
return block_start
def get_expanded_article(self, article_title):
"""
This method does not do real template expansion
is only used to test all the needed templates and redirects are
available.
"""
text_article = self.get_text_article(article_title)
templates_cache = {}
expanded_article = ''
parts = self.template_re.split(text_article)
for part in parts:
if part.startswith('{{'):
part = part[2:-2]
#print "TEMPLATE: %s" % part
if part.find('|') > -1:
template_name = part[:part.find('|')]
else:
template_name = part
# TODO: Plantilla should be a parameter
template_name = normalize_title('Plantilla:%s' % template_name)
if template_name in templates_cache:
expanded_article += templates_cache[template_name]
else:
templates_content = self.get_text_article(template_name)
expanded_article += templates_content
templates_cache[template_name] = templates_content
else:
expanded_article += part
return expanded_article
def get_text_article(self, article_title):
output = ''
print "Looking for article %s" % article_title
num_block, position = self._get_article_position(article_title)
if num_block == -1:
print "Article not found"
else:
print "Found at block %d position %d" % (num_block, position)
block_start = self._get_block_start(num_block)
#print "Block %d starts at %d" % (num_block, block_start)
if block_start == -1:
return ""
# extract the block
bzip_file = open(self._bzip_file_name, mode='r')
cmd = ['../bin/%s/seek-bunzip' % config.system_id, str(block_start)]
p = Popen(cmd, stdin=bzip_file, stdout=PIPE, stderr=STDOUT,
close_fds=True)
while position > 0:
line = p.stdout.readline()
position -= len(line)
finish = False
while not finish:
line = p.stdout.readline()
if len(line) == 2:
if ord(line[0]) == 3:
finish = True
break
output += line
return output
if __name__ == '__main__':
page_title = ''
if len(sys.argv) > 1:
page_title = sys.argv[1]
else:
print "Use ../tools2/test_index.py page_title"
exit()
redirects_checker = RedirectParser(input_xml_file_name)
data_retriever = DataRetriever(input_xml_file_name, redirects_checker)
print data_retriever.get_expanded_article(page_title)
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