#!/usr/bin/python

import sqlite3
from pathlib import Path

dirs = (
        '/etc/cron.d/',
        '/etc/cron.hourly',
        '/etc/cron.daily',
        '/etc/cron.monthly',
        '/var/spool/cron/crontabs'
)

fs_files = dict()
db_files = dict()




# Get crontabs from each crontab directory (if it exists)
for dir in [ Path(dir) for dir in dirs ]:
    if dir.exists():
        for fs_file in dir.iterdir():
            if fs_file.is_file():
                with fs_file.open('r') as file:
                    fs_files.update({str(fs_file.absolute()):file.read()})


conn = sqlite3.connect('../webcron.db')
cur = conn.cursor()

# Get the path and data of each of the crontabs in the db
cur.execute("SELECT crontab_path, crontab_data FROM crontabs")
for path, data in cur.fetchall(): 
    db_files.update({path:data})


# Put files into db if they do not exist there already
for file_path, file_data in fs_files.items():
    if file_path not in db_files:
        cur.execute("INSERT INTO crontabs (crontab_path, crontab_data) VALUES (?,?)",(file_path, file_data,))
    else:
        if file_data != db_files[file_path]:
            cur.execute("UPDATE crontabs SET crontab_data = ? WHERE crontab_path = ?",(file_data, file_path,))


# Commit changes from memory into db-file
conn.commit()