refactoring, and better logging

+ Add colored console logging
+ Add file logging
+ Refactor code
+ Add `--log-level` argument
+ Moved constant variables to separate file
+ Renamed some variables to be consistent throughout the program (`concurrent_connections` -> `concurrent_downloads`, `access_token` -> `bearer_token`)
+ If a keyfile isnt detected, we only warn the user instead of warning and exiting
+ External links are now written to their own shortcut file (they are still written to a single file still also) (Puyodead1#26)
+ Arguments `load-from-file` and `save-to-file` are no longer suppressed
+ Added Quiz URL
+ bump version

_version.py

@@ -1 +1 @@
-__version__ = "1.1.2"
+__version__ = "1.1.3"

constants.py

@@ -0,0 +1,32 @@
+import logging
+import os
+import time
+
+HEADERS = {
+    "Origin": "www.udemy.com",
+    # "User-Agent":
+    # "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0",
+    "Accept": "*/*",
+    "Accept-Encoding": None,
+}
+LOGIN_URL = "https://www.udemy.com/join/login-popup/?ref=&display_type=popup&loc"
+LOGOUT_URL = "https://www.udemy.com/user/logout"
+COURSE_URL = "https://{portal_name}.udemy.com/api-2.0/courses/{course_id}/cached-subscriber-curriculum-items?fields[asset]=results,title,external_url,time_estimation,download_urls,slide_urls,filename,asset_type,captions,media_license_token,course_is_drmed,media_sources,stream_urls,body&fields[chapter]=object_index,title,sort_order&fields[lecture]=id,title,object_index,asset,supplementary_assets,view_html&page_size=10000"
+COURSE_INFO_URL = "https://{portal_name}.udemy.com/api-2.0/courses/{course_id}/"
+COURSE_SEARCH = "https://{portal_name}.udemy.com/api-2.0/users/me/subscribed-courses?fields[course]=id,url,title,published_title&page=1&page_size=500&search={course_name}"
+SUBSCRIBED_COURSES = "https://{portal_name}.udemy.com/api-2.0/users/me/subscribed-courses/?ordering=-last_accessed&fields[course]=id,title,url&page=1&page_size=12"
+MY_COURSES_URL = "https://{portal_name}.udemy.com/api-2.0/users/me/subscribed-courses?fields[course]=id,url,title,published_title&ordering=-last_accessed,-access_time&page=1&page_size=10000"
+COLLECTION_URL = "https://{portal_name}.udemy.com/api-2.0/users/me/subscribed-courses-collections/?collection_has_courses=True&course_limit=20&fields[course]=last_accessed_time,title,published_title&fields[user_has_subscribed_courses_collection]=@all&page=1&page_size=1000"
+QUIZ_URL = "https://{portal_name}.udemy.com/api-2.0/quizzes/{quiz_id}/assessments/?version=1&page_size=250&fields[assessment]=id,assessment_type,prompt,correct_response,section,question_plain,related_lectures"
+
+HOME_DIR = os.getcwd()
+DOWNLOAD_DIR = os.path.join(os.getcwd(), "out_dir")
+SAVED_DIR = os.path.join(os.getcwd(), "saved")
+KEY_FILE_PATH = os.path.join(os.getcwd(), "keyfile.json")
+COOKIE_FILE_PATH = os.path.join(os.getcwd(), "cookies.txt")
+LOG_DIR_PATH = os.path.join(os.getcwd(), "logs")
+LOG_FILE_PATH = os.path.join(
+    os.getcwd(), "logs", f"{time.strftime('%Y-%m-%d-%I-%M-%S')}.log")
+LOG_FORMAT = '[%(asctime)s] [%(name)s] [%(funcName)s:%(lineno)d] %(levelname)s: %(message)s'
+LOG_DATE_FORMAT = '%I:%M:%S'
+LOG_LEVEL = logging.INFO