File size: 3,393 Bytes
630930b |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 |
import json
import os
import platform
import pwd
import time
from typing import List, Dict
from os import path as osp
import urllib.request as urllib2 # For Python 3.x
class Utils:
"""
Bunch of utils used for the Reddit Downloader.
"""
@staticmethod
def save_to_preferences(preferences: Dict[str, Dict], preferences_file: str):
"""
Save the preferences to a JSON file.
:param preferences: Dict containing preferences to save to file.
:param preferences_file: Location of the file where you want to save.
"""
with open(preferences_file, 'w') as f:
json.dump(preferences, f)
@staticmethod
def load_preferences(preferences_file: str) -> Dict:
"""
Load the preferences from JSON file and return as Dict.
:param preferences_file: Location of the file containing the preferences.
:return: preferences - Dict containing preferences to save to file.
"""
with open(preferences_file, 'r') as f:
preferences = json.load(f)
return preferences
@staticmethod
def get_os():
"""
Get the OS type (Linux or Macbook), and set the wallpaper folder accordingly.
:return:
os_type: Type of OS (Linux for Linux, Darwin for Mac).
wallpapers_directory: Directory where the wallpapers will be saved.
"""
os_type = platform.system()
assert os_type in {'Darwin', 'Linux'}
# Get the username
username = pwd.getpwuid(os.getuid()).pw_name
# Set the directory to download images.
wallpapers_directory = '/Users/{}/Pictures/Wallpapers/'.format(username) if os_type == 'Darwin' \
else '/home/{}/Wallpapers/'.format(username)
return platform.system(), wallpapers_directory
@staticmethod
def remove_unwanted_images(images: List[str]):
"""
Remove unwanted images. Since this is a naive approach, we might end up downloading some unwanted images, so we
delete them.
:param images: List of image file locations to filter and remove unwanted images from.
"""
count_removed = 0
for image in images:
# These are some random html pages that might have been downloaded.
# This is a fairly quick and naive approach to downloading images from reddit.
if osp.getsize(image) < 102400:
os.remove(image)
count_removed += 1
return count_removed
@staticmethod
def fetch_subreddit_data(subreddit_url: str, max_trials: int = 20) -> Dict:
"""
Fetch the subreddit JSON page based on the URL.
:param subreddit_url: URL created based on user inputs (subreddit, sort_type, sort_time, max_download_count).
:param max_trials: Maximum number of trial to use for fetching the subreddit JSON data.
:return: subreddit_data - Nested Dict containing Subreddit data for query.
"""
subreddit_data = None
for _ in range(max_trials):
try:
subreddit_page = urllib2.urlopen(subreddit_url)
subreddit_data = json.load(subreddit_page)
break
except:
time.sleep(0.2) # If we cannot access the reddit page, we wait for 2 seconds and retry.
return subreddit_data
|