240 lines
8.2 KiB
Python
240 lines
8.2 KiB
Python
# Gnu General Public License - see LICENSE.TXT
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import json
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from collections import defaultdict
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import threading
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import hashlib
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import os
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import cPickle
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import time
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#import copy
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#import urllib
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from .downloadutils import DownloadUtils
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from .simple_logging import SimpleLogging
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from .item_functions import extract_item_info
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from .kodi_utils import HomeWindow
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import xbmc
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import xbmcaddon
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log = SimpleLogging(__name__)
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class CacheItem():
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item_list = None
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item_list_hash = None
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date_saved = None
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last_action = None
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items_url = None
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file_path = None
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def __init__(self, *args):
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pass
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class DataManager():
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addon_dir = xbmc.translatePath(xbmcaddon.Addon().getAddonInfo('profile'))
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def __init__(self, *args):
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# log.debug("DataManager __init__")
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pass
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def loadJasonData(self, jsonData):
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return json.loads(jsonData, object_hook=lambda d: defaultdict(lambda: None, d))
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def GetContent(self, url):
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jsonData = DownloadUtils().downloadUrl(url)
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result = self.loadJasonData(jsonData)
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return result
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def get_items(self, url, gui_options, use_cache=False):
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home_window = HomeWindow()
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log.debug("last_content_url : use_cache={0} url={1}", use_cache, url)
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home_window.setProperty("last_content_url", url)
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user_id = DownloadUtils().getUserId()
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m = hashlib.md5()
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m.update(user_id + "|" + url)
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url_hash = m.hexdigest()
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cache_file = os.path.join(self.addon_dir, "cache_" + url_hash + ".pickle")
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#changed_url = url + "&MinDateLastSavedForUser=" + urllib.unquote("2019-09-16T13:45:30")
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#results = self.GetContent(changed_url)
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#log.debug("DataManager Changes Since Date : {0}", results)
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item_list = None
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baseline_name = None
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cache_thread = CacheManagerThread()
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cache_thread.gui_options = gui_options
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home_window.setProperty(cache_file, "true")
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clear_cache = home_window.getProperty("skip_cache_for_" + url)
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if clear_cache and os.path.isfile(cache_file):
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log.debug("Clearing cache data and loading new data")
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home_window.clearProperty("skip_cache_for_" + url)
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os.remove(cache_file)
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# try to load the list item data form the cache
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if os.path.isfile(cache_file) and use_cache:
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log.debug("Loading url data from cached pickle data")
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with open(cache_file, 'rb') as handle:
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try:
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cache_item = cPickle.load(handle)
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cache_thread.cached_item = cache_item
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item_list = cache_item.item_list
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except Exception as err:
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log.debug("Pickle Data Load Failed : {0}", err)
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item_list = None
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# we need to load the list item data form the server
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if item_list is None:
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log.debug("Loading url data from server")
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results = self.GetContent(url)
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if results is None:
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results = []
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if isinstance(results, dict) and results.get("Items") is not None:
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baseline_name = results.get("BaselineItemName")
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results = results.get("Items", [])
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elif isinstance(results, list) and len(results) > 0 and results[0].get("Items") is not None:
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baseline_name = results[0].get("BaselineItemName")
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results = results[0].get("Items")
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item_list = []
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for item in results:
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item_data = extract_item_info(item, gui_options)
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item_data.baseline_itemname = baseline_name
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item_list.append(item_data)
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cache_item = CacheItem()
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cache_item.item_list = item_list
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cache_item.file_path = cache_file
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cache_item.items_url = url
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cache_item.last_action = "fresh_data"
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cache_item.date_saved = time.time()
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cache_thread.cached_item = cache_item
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# copy.deepcopy(item_list)
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if use_cache:
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cache_thread.start()
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return cache_file, item_list
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class CacheManagerThread(threading.Thread):
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cached_item = None
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gui_options = None
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def __init__(self, *args):
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threading.Thread.__init__(self, *args)
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@staticmethod
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def get_data_hash(items):
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m = hashlib.md5()
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for item in items:
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item_string = "%s_%s_%s_%s_%s_%s" % (
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item.name,
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item.play_count,
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item.favorite,
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item.resume_time,
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item.recursive_unplayed_items_count,
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item.etag
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)
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item_string = item_string.encode("UTF-8")
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m.update(item_string)
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return m.hexdigest()
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def wait_for_save(self, home_window, file_name):
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loops = 0
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wait_refresh = home_window.getProperty(file_name)
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while wait_refresh and loops < 200 and not xbmc.Monitor().abortRequested():
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xbmc.sleep(100)
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loops = loops + 1
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wait_refresh = home_window.getProperty(file_name)
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return loops
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def run(self):
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log.debug("CacheManagerThread : Started")
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home_window = HomeWindow()
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is_fresh = False
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# if the data is fresh then just save it
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# if the data is to old do a reload
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if (self.cached_item.date_saved is not None
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and (time.time() - self.cached_item.date_saved) < 20
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and self.cached_item.last_action == "fresh_data"):
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is_fresh = True
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if is_fresh:
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log.debug("CacheManagerThread : Saving fresh data")
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cached_hash = self.get_data_hash(self.cached_item.item_list)
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self.cached_item.item_list_hash = cached_hash
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self.cached_item.last_action = "cached_data"
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self.cached_item.date_saved = time.time()
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loops = self.wait_for_save(home_window, self.cached_item.file_path)
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log.debug("CacheManagerThread : Saving New Data loops({0})", loops)
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with open(self.cached_item.file_path, 'wb') as handle:
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cPickle.dump(self.cached_item, handle, protocol=cPickle.HIGHEST_PROTOCOL)
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home_window.clearProperty(self.cached_item.file_path)
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else:
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log.debug("CacheManagerThread : Reloading to recheck data hashes")
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cached_hash = self.cached_item.item_list_hash
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log.debug("CacheManagerThread : Cache Hash : {0}", cached_hash)
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data_manager = DataManager()
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results = data_manager.GetContent(self.cached_item.items_url)
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if results is None:
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results = []
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if isinstance(results, dict) and results.get("Items") is not None:
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results = results.get("Items", [])
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elif isinstance(results, list) and len(results) > 0 and results[0].get("Items") is not None:
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results = results[0].get("Items")
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loaded_items = []
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for item in results:
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item_data = extract_item_info(item, self.gui_options)
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loaded_items.append(item_data)
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loaded_hash = self.get_data_hash(loaded_items)
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log.debug("CacheManagerThread : Loaded Hash : {0}", loaded_hash)
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# if they dont match then save the data and trigger a content reload
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if cached_hash != loaded_hash:
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log.debug("CacheManagerThread : Hashes different, saving new data and reloading container")
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self.cached_item.item_list = loaded_items
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self.cached_item.item_list_hash = loaded_hash
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self.cached_item.last_action = "fresh_data"
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self.cached_item.date_saved = time.time()
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# we need to refresh but will wait until the main function has finished
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loops = self.wait_for_save(home_window, self.cached_item.file_path)
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with open(self.cached_item.file_path, 'wb') as handle:
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cPickle.dump(self.cached_item, handle, protocol=cPickle.HIGHEST_PROTOCOL)
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home_window.clearProperty(self.cached_item.file_path)
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log.debug("CacheManagerThread : Sending container refresh ({0})", loops)
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xbmc.executebuiltin("Container.Refresh")
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log.debug("CacheManagerThread : Exited")
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