simplerss/src/RSSPoller.py

   1 # for localized messages
   2 from . import _
   3
   4 from Components.config import config
   5 from enigma import eTimer
   6
   7 from Tools.Notifications import AddPopup
   8 from Screens.MessageBox import MessageBox
   9
  10 from RSSFeed import BaseFeed, UniversalFeed
  11
  12 from twisted.web.client import getPage
  13 from xml.etree.cElementTree import fromstring as cElementTree_fromstring
  14
  15 from GoogleReader import GoogleReader
  16
  17 NOTIFICATIONID = 'SimpleRSSUpdateNotification'
  18
  19 update_callbacks = []
  20
  21 class RSSPoller:
  22         """Keeps all Feed and takes care of (automatic) updates"""
  23
  24         def __init__(self, poll = True):
  25                 # Timer
  26                 self.poll_timer = eTimer()
  27                 self.poll_timer.callback.append(self.poll)
  28                 self.do_poll = poll
  29
  30                 # this indicates we're reloading the list of feeds
  31                 self.reloading = False
  32
  33                 self.newItemFeed = BaseFeed(
  34                         "",
  35                         _("New Items"),
  36                         _("New Items since last Auto-Update"),
  37                 )
  38
  39                 # Generate Feeds
  40                 self.feeds = [
  41                         UniversalFeed(
  42                                 x.uri.value,
  43                                 x.autoupdate.value
  44                         )
  45                                 for x in config.plugins.simpleRSS.feed
  46                 ]
  47
  48                 if not config.plugins.simpleRSS.enable_google_reader.value:
  49                         if poll:
  50                                 self.poll_timer.start(0, 1)
  51                 else:
  52                         self.googleReader = GoogleReader(config.plugins.simpleRSS.google_username.value, config.plugins.simpleRSS.google_password.value)
  53                         self.googleReader.login().addCallback(self.googleLoggedIn).addErrback(self.googleLoginFailed)
  54
  55                 # Initialize Vars
  56                 self.current_feed = 0
  57
  58         def googleLoggedIn(self, sid = None):
  59                 self.googleReader.getSubscriptionList().addCallback(self.googleSubscriptionList).addErrback(self.googleSubscriptionFailed)
  60
  61         def googleLoginFailed(self, res = None):
  62                 AddPopup(
  63                         _("Failed to login to Google Reader."),
  64                         MessageBox.TYPE_ERROR,
  65                         5,
  66                 )
  67
  68                 self.reloading = False
  69                 if self.do_poll:
  70                         self.poll_timer.start(0, 1)
  71
  72         def googleSubscriptionList(self, subscriptions = None):
  73                 self.feeds.extend(subscriptions)
  74
  75                 self.reloading = False
  76                 if self.do_poll:
  77                         self.doCallback()
  78                         self.poll_timer.start(0, 1)
  79
  80         def googleSubscriptionFailed(self, res = None):
  81                 AddPopup(
  82                         _("Failed to get subscriptions from Google Reader."),
  83                         MessageBox.TYPE_ERROR,
  84                         5,
  85                 )
  86
  87                 self.reloading = False
  88                 if self.do_poll:
  89                         self.poll_timer.start(0, 1)
  90
  91         def addCallback(self, callback):
  92                 if callback not in update_callbacks:
  93                         update_callbacks.append(callback)
  94
  95         def removeCallback(self, callback):
  96                 if callback in update_callbacks:
  97                         update_callbacks.remove(callback)
  98
  99         def doCallback(self, id = None):
 100                 for callback in update_callbacks:
 101                         try:
 102                                 callback(id)
 103                         except Exception:
 104                                 pass
 105
 106         def error(self, error = ""):
 107                 print "[SimpleRSS] failed to fetch feed:", error
 108
 109                 # Assume its just a temporary failure and jump over to next feed
 110                 self.next_feed()
 111
 112         def _gotPage(self, data, id = None, callback = False, errorback = None):
 113                 # workaround: exceptions in gotPage-callback were ignored
 114                 try:
 115                         self.gotPage(data, id)
 116                         if callback:
 117                                 self.doCallback(id)
 118                 except NotImplementedError, errmsg:
 119                         # Don't show this error when updating in background
 120                         if id is not None:
 121                                 AddPopup(
 122                                         _("Sorry, this type of feed is unsupported:\n%s") % (str(errmsg)),
 123                                         MessageBox.TYPE_INFO,
 124                                         5,
 125                                 )
 126                         else:
 127                                 # We don't want to stop updating just because one feed is broken
 128                                 self.next_feed()
 129                 except Exception:
 130                         import traceback, sys
 131                         traceback.print_exc(file=sys.stdout)
 132                         # Errorback given, call it (asumme we don't need do restart timer!)
 133                         if errorback is not None:
 134                                 errorback()
 135                                 return
 136                         # Assume its just a temporary failure and jump over to next feed
 137                         self.next_feed()
 138
 139         def gotPage(self, data, id = None):
 140                 feed = cElementTree_fromstring(data)
 141
 142                 # For Single-Polling
 143                 if id is not None:
 144                         self.feeds[id].gotFeed(feed)
 145                         print "[SimpleRSS] single feed parsed..."
 146                         return
 147
 148                 new_items = self.feeds[self.current_feed].gotFeed(feed)
 149
 150                 print "[SimpleRSS] feed parsed..."
 151
 152                 # Append new items to locally bound ones
 153                 if new_items is not None:
 154                         self.newItemFeed.history.extend(new_items)
 155
 156                 # Start Timer so we can either fetch next feed or show new_items
 157                 self.next_feed()
 158
 159         def singlePoll(self, id, callback = False, errorback = None):
 160                 getPage(self.feeds[id].uri).addCallback(self._gotPage, id, callback, errorback).addErrback(errorback)
 161
 162         def poll(self):
 163                 # Reloading, reschedule
 164                 if self.reloading:
 165                         print "[SimpleRSS] timer triggered while reloading, rescheduling"
 166                         self.poll_timer.start(10000, 1)
 167                 # End of List
 168                 elif len(self.feeds) <= self.current_feed:
 169                         # New Items
 170                         if self.newItemFeed.history:
 171                                 print "[SimpleRSS] got new items, calling back"
 172                                 self.doCallback()
 173
 174                                 # Inform User
 175                                 update_notification_value = config.plugins.simpleRSS.update_notification.value
 176                                 if update_notification_value == "preview":
 177                                         from RSSScreens import RSSFeedView
 178
 179                                         from Tools.Notifications import AddNotificationWithID, RemovePopup
 180
 181                                         RemovePopup(NOTIFICATIONID)
 182
 183                                         AddNotificationWithID(
 184                                                 NOTIFICATIONID,
 185                                                 RSSFeedView,
 186                                                 self.newItemFeed,
 187                                                 newItems = True
 188                                         )
 189                                 elif update_notification_value == "notification":
 190                                         AddPopup(
 191                                                 _("Received %d new news item(s).") % (len(self.newItemFeed.history)),
 192                                                 MessageBox.TYPE_INFO,
 193                                                 5,
 194                                                 NOTIFICATIONID
 195                                         )
 196                         # No new Items
 197                         else:
 198                                 print "[SimpleRSS] no new items"
 199
 200                         self.current_feed = 0
 201                         self.poll_timer.startLongTimer(config.plugins.simpleRSS.interval.value*60)
 202                 # It's updating-time
 203                 else:
 204                         # Assume we're cleaning history if current feed is 0
 205                         clearHistory = self.current_feed == 0
 206                         if config.plugins.simpleRSS.update_notification.value != "none":
 207                                 from Tools.Notifications import current_notifications, notifications
 208                                 for x in current_notifications:
 209                                         if x[0] == NOTIFICATIONID:
 210                                                 print "[SimpleRSS] timer triggered while preview on screen, rescheduling"
 211                                                 self.poll_timer.start(10000, 1)
 212                                                 return
 213
 214                                 if clearHistory:
 215                                         for x in notifications:
 216                                                 if x[4] and x[4] == NOTIFICATIONID:
 217                                                         print "[SimpleRSS] wont wipe history because it was never read"
 218                                                         clearHistory = False
 219                                                         break
 220
 221                         if clearHistory:
 222                                 del self.newItemFeed.history[:]
 223
 224                         # Feed supposed to autoupdate
 225                         feed = self.feeds[self.current_feed]
 226
 227                         if feed.autoupdate:
 228                                 getPage(feed.uri).addCallback(self._gotPage).addErrback(self.error)
 229                         # Go to next feed
 230                         else:
 231                                 print "[SimpleRSS] passing feed"
 232                                 self.next_feed()
 233
 234         def next_feed(self):
 235                 self.current_feed += 1
 236                 self.poll_timer.start(1000, 1)
 237
 238         def shutdown(self):
 239                 self.poll_timer.callback.remove(self.poll)
 240                 self.poll_timer = None
 241                 self.do_poll = False
 242
 243         def triggerReload(self):
 244                 self.reloading = True
 245
 246                 newfeeds = []
 247                 oldfeeds = self.feeds
 248                 found = False
 249                 for x in config.plugins.simpleRSS.feed:
 250                         for feed in oldfeeds:
 251                                 if x.uri.value == feed.uri:
 252                                         # Update possibly different autoupdate value
 253                                         feed.autoupdate = x.autoupdate.value
 254                                         newfeeds.append(feed) # Append to new Feeds
 255                                         oldfeeds.remove(feed) # Remove from old Feeds
 256                                         found = True
 257                                         break
 258                         if not found:
 259                                 newfeeds.append(
 260                                         UniversalFeed(
 261                                                 x.uri.value,
 262                                                 x.autoupdate.value
 263                                 ))
 264                         found = False
 265
 266                 self.feeds = newfeeds
 267
 268                 if config.plugins.simpleRSS.enable_google_reader.value:
 269                         self.googleReader = GoogleReader(config.plugins.simpleRSS.google_username.value, config.plugins.simpleRSS.google_password.value)
 270                         self.googleReader.login().addCallback(self.googleLoggedIn).addErrback(self.googleLoginFailed)
 271                 else:
 272                         self.reloading = False
 273