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BackupFileManager.py
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import os
import time
import shutil
import glob
import re
class BackupFileManager:
'''
backup_filetype = ["tgz", ""]
'''
def __init__(self, backup_name, backup_location, backup_filetype, daily_num, weekly_num, monthly_num, current_folder_needed=False):
self.backup_name = backup_name
self.backup_location = backup_location
self.backup_filetype = backup_filetype
self.daily_num = daily_num
self.weekly_num = weekly_num
self.monthly_num = monthly_num
self.current_folder_needed = current_folder_needed
def get_backup_file_extension(self):
if self.backup_filetype == "tgz":
return ".tgz"
else:
return ""
def create_backups_as_needed(self, backup_file):
backups_needed = self.backups_need_update()
if backups_needed['day']:
full_day_path = self.get_day_full_path()
print("Copying backup file to day path")
print("cp " + backup_file + " " + full_day_path)
shutil.copy(backup_file, full_day_path)
if backups_needed['week']:
full_week_path = self.get_week_full_path()
print("Copying backup file to week path")
print("cp " + backup_file + " " + full_week_path)
shutil.copy(backup_file, full_week_path)
if backups_needed['month']:
full_month_path = self.get_month_full_path()
print("Copying backup file to month path")
print("cp " + backup_file + " " + full_month_path)
shutil.copy(backup_file, full_month_path)
self.manage_previous_backups()
def manage_previous_backups(self):
if self.daily_num and self.daily_num != -1:
day_glob_filename = os.path.join(self.get_day_backup_location(),
self.backup_name + "_day_*" + self.get_backup_file_extension())
day_files = glob.glob(day_glob_filename)
day_files.sort()
if len(day_files) > self.daily_num:
num_to_remove = len(day_files) - self.daily_num
for i in range(num_to_remove):
file_path_to_remove = day_files[i]
print("Removing file due to number of archives exceeded" + file_path_to_remove)
self.remove_backup(file_path_to_remove)
if self.weekly_num and self.weekly_num != -1:
week_glob_filename = os.path.join(self.get_week_backup_location(),
self.backup_name + "_week_*" + self.get_backup_file_extension())
week_files = glob.glob(week_glob_filename)
week_files.sort()
if len(week_files) > self.weekly_num:
num_to_remove = len(week_files) - self.weekly_num
for i in range(num_to_remove):
file_path_to_remove = week_files[i]
print("Removing file due to number of archives exceeded" + file_path_to_remove)
self.remove_backup(file_path_to_remove)
if self.monthly_num and self.monthly_num != -1:
month_glob_filename = os.path.join(self.get_month_backup_location(),
self.backup_name + "_month_*" + self.get_backup_file_extension())
month_files = glob.glob(month_glob_filename)
month_files.sort()
if len(month_files) > self.monthly_num:
num_to_remove = len(month_files) - self.monthly_num
for i in range(num_to_remove):
file_path_to_remove = month_files[i]
print("Removing file due to number of archives exceeded" + file_path_to_remove)
self.remove_backup(file_path_to_remove)
def remove_backup(self, path):
if os.path.isdir(path):
shutil.rmtree(path)
os.unlink(path)
else:
os.unlink(path)
def get_day_filelocation(self):
return time.strftime(self.backup_name + "_day_%Y_%m_%d" + self.get_backup_file_extension())
def get_week_filelocation(self):
return time.strftime(self.backup_name + "_week_%Y_%W" + self.get_backup_file_extension())
def get_month_filelocation(self):
return time.strftime(self.backup_name + "_month_%Y_%m" + self.get_backup_file_extension())
def get_current_location(self):
return os.path.join(self.backup_location, "current")
def get_tmp_location(self):
return os.path.join(self.backup_location, "tmp")
def get_day_backup_location(self):
return os.path.join(self.backup_location, "day")
def get_week_backup_location(self):
return os.path.join(self.backup_location, "week")
def get_month_backup_location(self):
return os.path.join(self.backup_location, "month")
def get_day_full_path(self):
return os.path.join(self.get_day_backup_location(), self.get_day_filelocation())
def get_week_full_path(self):
return os.path.join(self.get_week_backup_location(), self.get_week_filelocation())
def get_month_full_path(self):
return os.path.join(self.get_month_backup_location(), self.get_month_filelocation())
def create_all_needed_dirs(self):
locations_to_create = [self.backup_location, self.get_tmp_location()]
if self.current_folder_needed:
locations_to_create.append(self.get_current_location())
if self.daily_num:
locations_to_create.append(self.get_day_backup_location())
if self.weekly_num:
locations_to_create.append(self.get_week_backup_location())
if self.monthly_num:
locations_to_create.append(self.get_month_backup_location())
for loc in locations_to_create:
if not os.path.isdir(loc):
os.makedirs(loc)
def backup_needed(self):
all_backups_needed = self.backups_need_update()
return (all_backups_needed['day'] or all_backups_needed['week'] or all_backups_needed['month'])
def backups_need_update(self):
if self.daily_num:
day_backup_loc = self.get_day_backup_location()
day_backup = os.path.join(day_backup_loc, self.get_day_filelocation())
if not os.path.isfile(day_backup):
copy_day_file = True
else:
copy_day_file = False
else:
copy_day_file = False
if self.weekly_num:
week_backup_loc = self.get_week_backup_location()
week_backup = os.path.join(week_backup_loc, self.get_week_filelocation())
if not os.path.isfile(week_backup):
copy_week_file = True
else:
copy_week_file = False
else:
copy_week_file = False
if self.monthly_num:
month_backup_loc = self.get_month_backup_location()
month_backup = os.path.join(month_backup_loc, self.get_month_filelocation())
if not os.path.isfile(month_backup):
copy_month_file = True
else:
copy_month_file = False
else:
copy_month_file = False
return {
"day": copy_day_file,
"week": copy_week_file,
"month": copy_month_file
}