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#!/usr/bin/python3
"""
Maps nodes to short descriptions, using data from DBpedia and
Wikipedia, and stores results in the database.
"""
import os, sqlite3
DBPEDIA_DB = os.path.join('dbpedia', 'desc_data.db')
ENWIKI_DB = os.path.join('enwiki', 'desc_data.db')
DB_FILE = 'data.db'
def genData(dbpediaDb: str, enwikiDb: str, dbFile: str) -> None:
print('Creating table')
dbCon = sqlite3.connect(dbFile)
dbCur = dbCon.cursor()
dbCur.execute('CREATE TABLE descs (wiki_id INT PRIMARY KEY, desc TEXT, from_dbp INT)')
#
print('Getting node mappings')
nodeToWikiId: dict[str, int] = {}
for name, wikiId in dbCur.execute('SELECT name, id from wiki_ids'):
nodeToWikiId[name] = wikiId
#
print('Reading data from DBpedia')
dbpCon = sqlite3.connect(dbpediaDb)
dbpCur = dbpCon.cursor()
print('Getting node IRIs')
nodeToIri: dict[str, str] = {}
iterNum = 0
for name, wikiId in nodeToWikiId.items():
iterNum += 1
if iterNum % 1e5 == 0:
print(f'At iteration {iterNum}')
#
row = dbpCur.execute('SELECT iri FROM ids where id = ?', (wikiId,)).fetchone()
if row is not None:
nodeToIri[name] = row[0]
print('Resolving redirects')
iterNum = 0
for name, iri in nodeToIri.items():
iterNum += 1
if iterNum % 1e5 == 0:
print(f'At iteration {iterNum}')
#
row = dbpCur.execute('SELECT target FROM redirects where iri = ?', (iri,)).fetchone()
if row is not None:
nodeToIri[name] = row[0]
print('Adding descriptions')
iterNum = 0
for name, iri in nodeToIri.items():
iterNum += 1
if iterNum % 1e4 == 0:
print(f'At iteration {iterNum}')
#
row = dbpCur.execute('SELECT abstract FROM abstracts WHERE iri = ?', (iri,)).fetchone()
if row is not None:
dbCur.execute('INSERT OR IGNORE INTO descs VALUES (?, ?, ?)', (nodeToWikiId[name], row[0], 1))
del nodeToWikiId[name]
dbpCon.close()
#
print('Reading data from Wikipedia')
enwikiCon = sqlite3.connect(enwikiDb)
enwikiCur = enwikiCon.cursor()
print('Adding descriptions')
iterNum = 0
for name, wikiId in nodeToWikiId.items():
iterNum += 1
if iterNum % 1e3 == 0:
print(f'At iteration {iterNum}')
# Check for redirect
wikiIdToGet = wikiId
query = 'SELECT pages.id FROM redirects INNER JOIN pages ON redirects.target = pages.title' \
' WHERE redirects.id = ?'
row = enwikiCur.execute(query, (wikiId,)).fetchone()
if row is not None:
wikiIdToGet = row[0]
#
row = enwikiCur.execute('SELECT desc FROM descs where id = ?', (wikiIdToGet,)).fetchone()
if row is not None:
dbCur.execute('INSERT OR IGNORE INTO descs VALUES (?, ?, ?)', (wikiId, row[0], 0))
#
print('Closing databases')
dbCon.commit()
dbCon.close()
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
args = parser.parse_args()
#
genData(DBPEDIA_DB, ENWIKI_DB, DB_FILE)
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