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utils.py
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utils.py
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import os
import glob
import sqlite3
import constants
# Create a folder on determinate path.
# path - string - Path to create folder.
def make_folder(path):
if not os.path.exists(path):
os.makedirs(path)
# Get a list of *.json files on determined folder.
# path - string - Path to search *.json files.
def get_json(path):
file_list = []
file_list = file_list + glob.glob(path + '/' + '*.json')
return file_list
# Replace accented characters.
# word - Characters to replace.
def remove_unsupported_chars(word):
word = word.replace(' ', '_')
word = word.replace('.', '_')
word = word.replace('á', 'a')
word = word.replace('é', 'e')
word = word.replace('í', 'i')
word = word.replace('ó', 'o')
word = word.replace('ú', 'u')
return str(word)
# Check if a table exists. True if exists. False if not exists.
# table_name - string - Name of database table for check if exists.
def check_table(table_name):
conn = None
table_name = remove_unsupported_chars(table_name).lower()
table_name = (table_name,)
try:
conn = sqlite3.connect(constants.SQLITE_PATH + '/' + constants.SQLITE_FILE, detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES)
with conn:
cur = conn.cursor()
cur.execute('''SELECT name FROM sqlite_master WHERE type = 'table' AND name = ?;''', table_name)
rows = cur.fetchone()
if rows is None:
return False
else:
return True
except sqlite3.Error as e_sql:
print(e_sql)
print('Error on SQLite.')
return None
except Exception as e:
print(e)
print('General exception.')
finally:
if conn:
conn.close()
# Create table
# table_name - string - Name for the new table.
def create_table(table_name):
conn = None
table_name = remove_unsupported_chars(table_name).lower()
try:
conn = sqlite3.connect(constants.SQLITE_PATH + '/' + constants.SQLITE_FILE, detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES)
with conn:
cur = conn.cursor()
cur.execute('CREATE TABLE {0} (id INTEGER PRIMARY KEY AUTOINCREMENT, section TEXT, title TEXT, url TEXT, timestamp INTEGER);'.format(table_name))
conn.commit()
# Print table name created.
print('\nTable ' + table_name + ' created.\n')
return True
except sqlite3.Error as e_sql:
print(e_sql)
print('Error on SQLite.')
return False
except Exception as e:
print(e)
print('General exception.')
return False
finally:
if conn:
conn.close()
# Get rows for a determinate newspaper section.
# table_name - string - Name of the table.
# section - string - Name of the newspaper section.
def rows_table(table_name):
conn = None
table_name = remove_unsupported_chars(table_name).lower()
try:
conn = sqlite3.connect(constants.SQLITE_PATH + '/' + constants.SQLITE_FILE, detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES)
with conn:
cur = conn.cursor()
cur.execute('SELECT * FROM {0};'.format(table_name))
rows = cur.fetchall()
return rows
except sqlite3.Error as e_sql:
print(e_sql)
print('Error on SQLite.')
return None
except Exception as e:
print(e)
print('General exception.')
finally:
if conn:
conn.close()
# Get rows for a determinate newspaper section.
# table_name - string - Name of the table.
# section - string - Name of the newspaper section.
def rows_by_section(table_name, section):
conn = None
table_name = remove_unsupported_chars(table_name).lower()
section = (section,)
try:
conn = sqlite3.connect(constants.SQLITE_PATH + '/' + constants.SQLITE_FILE, detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES)
with conn:
cur = conn.cursor()
cur.execute('SELECT title, url FROM {0} WHERE section = ? ORDER BY id DESC;'.format(table_name), section)
rows = cur.fetchall()
return rows
except sqlite3.Error as e_sql:
print(e_sql)
print('Error on SQLite.')
return None
except Exception as e:
print(e)
print('General exception.')
finally:
if conn:
conn.close()
# Insert a new row on determined table.
# table_name - string - Name of the table.
# data - list - Data for row to insert.
def insert_row(table_name, data):
conn = None
table_name = remove_unsupported_chars(table_name).lower()
table_name = (table_name,)
try:
conn = sqlite3.connect(constants.SQLITE_PATH + '/' + constants.SQLITE_FILE, detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES)
with conn:
cur = conn.cursor()
cur.execute('''INSERT INTO {0} (section, title, url, timestamp) VALUES (?, ?, ?, (SELECT strftime('%s','now')));'''.format(table_name[0]), (data[0], data[1], data[2]))
conn.commit()
return True
except sqlite3.Error as e_sql:
print(e_sql)
print('Error on SQLite.')
return False
except Exception as e:
print(e)
print('General exception.')
return False
finally:
if conn:
conn.close()