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#!/usr/bin/python3
"""
Maps events to short descriptions from Wikipedia, and stores them in the database.
"""
import argparse
import os
import sqlite3
ENWIKI_DB = os.path.join('enwiki', 'desc_data.db')
DB_FILE = 'data.db'
def genData(enwikiDb: str, dbFile: str) -> None:
print('Creating table')
dbCon = sqlite3.connect(dbFile)
dbCur = dbCon.cursor()
dbCur.execute('CREATE TABLE descs (id INT PRIMARY KEY, wiki_id INT, desc TEXT)')
print('Getting events')
titleToId: dict[str, int] = {}
for eventId, title in dbCur.execute('SELECT id, title FROM events'):
titleToId[title] = eventId
print('Getting Wikipedia descriptions')
enwikiCon = sqlite3.connect(enwikiDb)
enwikiCur = enwikiCon.cursor()
iterNum = 0
for title, eventId in titleToId.items():
iterNum += 1
if iterNum % 1e4 == 0:
print(f'At iteration {iterNum}')
# Get wiki ID
row = enwikiCur.execute('SELECT id FROM pages WHERE title = ?', (title,)).fetchone()
if row is None:
continue
wikiId = row[0]
# 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]
# Get desc
row = enwikiCur.execute('SELECT desc FROM descs where id = ?', (wikiIdToGet,)).fetchone()
if row is None:
continue
dbCur.execute('INSERT INTO descs VALUES (?, ?, ?)', (eventId, wikiId, row[0]))
print('Closing databases')
dbCon.commit()
dbCon.close()
if __name__ == '__main__':
parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
args = parser.parse_args()
genData(ENWIKI_DB, DB_FILE)
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