RecordTimer.py

   1 import time
   2 import codecs
   3 #from time import datetime
   4 from Tools import Directories, Notifications
   5
   6 from Components.config import config
   7 import timer
   8 import xml.dom.minidom
   9
  10 from Screens.MessageBox import MessageBox
  11 from Screens.SubserviceSelection import SubserviceSelection
  12 import NavigationInstance
  13
  14 from Tools.XMLTools import elementsWithTag, mergeText
  15 from ServiceReference import ServiceReference
  16
  17 # ok, for descriptions etc we have:
  18 # service reference  (to get the service name)
  19 # name               (title)
  20 # description        (description)
  21 # event data         (ONLY for time adjustments etc.)
  22
  23
  24 # parses an event, and gives out a (begin, end, name, duration, eit)-tuple.
  25 def parseEvent(ev):
  26         name = ev.getEventName()
  27         description = ev.getShortDescription()
  28         begin = ev.getBeginTime()
  29         end = begin + ev.getDuration()
  30         eit = ev.getEventId()
  31         return (begin, end, name, description, eit)
  32
  33 # please do not translate log messages
  34 class RecordTimerEntry(timer.TimerEntry):
  35         def __init__(self, serviceref, begin, end, name, description, eit):
  36                 timer.TimerEntry.__init__(self, int(begin), int(end))
  37
  38                 assert isinstance(serviceref, ServiceReference)
  39
  40                 self.service_ref = serviceref
  41                 self.eit = eit
  42                 self.dontSave = False
  43                 self.name = name
  44                 self.description = description
  45                 self.timer = None
  46                 self.record_service = None
  47
  48                 self.log_entries = []
  49                 self.resetState()
  50
  51         def log(self, code, msg):
  52                 self.log_entries.append((int(time.time()), code, msg))
  53                 print "[TIMER]", msg
  54
  55         def resetState(self):
  56                 self.state = self.StateWaiting
  57                 self.first_try_prepare = True
  58                 self.timeChanged()
  59
  60         def calculateFilename(self):
  61                 service_name = self.service_ref.getServiceName()
  62 #               begin_date = datetime.fromtimestamp(begin).strf...
  63                 begin_date = ""
  64
  65                 print "begin_date: ", begin_date
  66                 print "service_name: ", service_name
  67                 print "name:", self.name
  68                 print "description: ", self.description
  69
  70                 self.Filename = Directories.getRecordingFilename(service_name)
  71                 self.log(0, "Filename calculated as: '%s'" % self.Filename)
  72                 #begin_date + " - " + service_name + description)
  73
  74         def tryPrepare(self):
  75                 self.calculateFilename()
  76                 self.record_service = NavigationInstance.instance.recordService(self.service_ref)
  77                 if self.record_service == None:
  78                         self.log(1, "'record service' failed")
  79                         return False
  80                 else:
  81                         prep_res = self.record_service.prepare(self.Filename + ".ts")
  82                         if prep_res:
  83                                 self.log(2, "'prepare' failed: error %d" % prep_res)
  84                                 self.record_service = None
  85                                 return False
  86
  87                         self.log(3, "prepare ok, writing meta information to %s" % self.Filename)
  88                         try:
  89                                 f = open(self.Filename + ".ts.meta", "w")
  90                                 f.write(str(self.service_ref) + "\n")
  91                                 f.write(self.name + "\n")
  92                                 f.write(self.description + "\n")
  93                                 f.write(str(self.begin) + "\n")
  94                                 f.close()
  95                         except:
  96                                 self.log(4, "failed to write meta information")
  97                         return True
  98
  99         def do_backoff(self):
 100                 if self.backoff == 0:
 101                         self.backoff = 5
 102                 else:
 103                         self.backoff *= 2
 104                         if self.backoff > 100:
 105                                 self.backoff = 100
 106                 self.log(10, "backoff: retry in %d seconds" % self.backoff)
 107
 108         def activate(self):
 109                 next_state = self.state + 1
 110                 self.log(5, "activating state %d" % next_state)
 111
 112                 if next_state == self.StatePrepared:
 113                         if self.tryPrepare():
 114                                 self.log(6, "prepare ok, waiting for begin")
 115                                 # fine. it worked, resources are allocated.
 116                                 self.next_activation = self.begin
 117                                 self.backoff = 0
 118                                 return True
 119
 120                         self.log(7, "prepare failed")
 121                         if self.first_try_prepare:
 122                                 self.first_try_prepare = False
 123                                 if config.recording.asktozap.value == 0:
 124                                         self.log(8, "asking user to zap away")
 125                                         Notifications.AddNotificationWithCallback(self.failureCB, MessageBox, _("A timer failed to record!\nDisable TV and try again?\n"))
 126                                 else: # zap without asking
 127                                         self.log(9, "zap without asking")
 128                                         self.failureCB(True)
 129
 130                         self.do_backoff()
 131                         # retry
 132                         self.start_prepare = time.time() + self.backoff
 133                         return False
 134                 elif next_state == self.StateRunning:
 135                         self.log(11, "start recording")
 136                         record_res = self.record_service.start()
 137
 138                         if record_res:
 139                                 self.log(13, "start record returned %d" % record_res)
 140                                 self.do_backoff()
 141                                 # retry
 142                                 self.begin = time.time() + self.backoff
 143                                 return False
 144
 145                         return True
 146                 elif next_state == self.StateEnded:
 147                         self.log(12, "stop recording")
 148                         self.record_service.stop()
 149                         self.record_service = None
 150                         return True
 151
 152         def getNextActivation(self):
 153                 if self.state == self.StateEnded:
 154                         return self.end
 155
 156                 next_state = self.state + 1
 157
 158                 return {self.StatePrepared: self.start_prepare,
 159                                 self.StateRunning: self.begin,
 160                                 self.StateEnded: self.end }[next_state]
 161
 162         def failureCB(self, answer):
 163                 if answer == True:
 164                         self.log(13, "ok, zapped away")
 165                         #NavigationInstance.instance.stopUserServices()
 166                         NavigationInstance.instance.playService(self.service_ref.ref)
 167                 else:
 168                         self.log(14, "user didn't want to zap away, record will probably fail")
 169
 170         def timeChanged(self):
 171                 self.start_prepare = self.begin - self.prepare_time
 172                 self.backoff = 0
 173                 self.log(15, "record time changed, start prepare is now: %s" % time.ctime(self.start_prepare))
 174
 175 def createTimer(xml):
 176         begin = int(xml.getAttribute("begin"))
 177         end = int(xml.getAttribute("end"))
 178         serviceref = ServiceReference(str(xml.getAttribute("serviceref")))
 179         description = xml.getAttribute("description").encode("utf-8")
 180         repeated = xml.getAttribute("repeated").encode("utf-8")
 181         eit = xml.getAttribute("eit").encode("utf-8")
 182         name = xml.getAttribute("name").encode("utf-8")
 183         #filename = xml.getAttribute("filename").encode("utf-8")
 184         entry = RecordTimerEntry(serviceref, begin, end, name, description, eit)
 185         entry.repeated = int(repeated)
 186
 187         for l in elementsWithTag(xml.childNodes, "log"):
 188                 time = int(l.getAttribute("time"))
 189                 code = int(l.getAttribute("code"))
 190                 msg = mergeText(l.childNodes).strip()
 191                 entry.log_entries.append((time, code, msg))
 192
 193         return entry
 194
 195 class RecordTimer(timer.Timer):
 196         def __init__(self):
 197                 timer.Timer.__init__(self)
 198
 199                 self.Filename = Directories.resolveFilename(Directories.SCOPE_CONFIG, "timers.xml")
 200
 201                 try:
 202                         self.loadTimer()
 203                 except IOError:
 204                         print "unable to load timers from file!"
 205
 206         def isRecording(self):
 207                 isRunning = False
 208                 for timer in self.timer_list:
 209                         if timer.isRunning():
 210                                 isRunning = True
 211                 return isRunning
 212
 213         def loadTimer(self):
 214                 # TODO: PATH!
 215                 doc = xml.dom.minidom.parse(self.Filename)
 216
 217                 root = doc.childNodes[0]
 218                 for timer in elementsWithTag(root.childNodes, "timer"):
 219                         self.record(createTimer(timer))
 220
 221         def saveTimer(self):
 222                 doc = xml.dom.minidom.Document()
 223                 root_element = doc.createElement('timers')
 224                 doc.appendChild(root_element)
 225                 root_element.appendChild(doc.createTextNode("\n"))
 226
 227                 for timer in self.timer_list + self.processed_timers:
 228                         # some timers (instant records) don't want to be saved.
 229                         # skip them
 230                         if timer.dontSave:
 231                                 continue
 232                         t = doc.createTextNode("\t")
 233                         root_element.appendChild(t)
 234                         t = doc.createElement('timer')
 235                         t.setAttribute("begin", str(int(timer.begin)))
 236                         t.setAttribute("end", str(int(timer.end)))
 237                         t.setAttribute("serviceref", str(timer.service_ref))
 238                         t.setAttribute("repeated", str(timer.repeated))
 239                         t.setAttribute("name", timer.name)
 240                         t.setAttribute("description", timer.description)
 241                         t.setAttribute("eit", str(timer.eit))
 242
 243                         for time, code, msg in timer.log_entries:
 244                                 t.appendChild(doc.createTextNode("\t\t"))
 245                                 l = doc.createElement('log')
 246                                 l.setAttribute("time", str(time))
 247                                 l.setAttribute("code", str(code))
 248                                 l.appendChild(doc.createTextNode(msg))
 249                                 t.appendChild(l)
 250                                 t.appendChild(doc.createTextNode("\n"))
 251
 252                         root_element.appendChild(t)
 253                         t = doc.createTextNode("\n")
 254                         root_element.appendChild(t)
 255
 256                 file = open(self.Filename, "w")
 257                 doc.writexml(file)
 258                 file.write("\n")
 259                 file.close()
 260
 261         def record(self, entry):
 262                 entry.timeChanged()
 263                 print "[Timer] Record " + str(entry)
 264                 entry.Timer = self
 265                 self.addTimerEntry(entry)
 266
 267         def removeEntry(self, entry):
 268                 print "[Timer] Remove " + str(entry)
 269
 270                 # avoid re-enqueuing
 271                 entry.repeated = False
 272
 273                 # abort timer.
 274                 # this sets the end time to current time, so timer will be stopped.
 275                 entry.abort()
 276
 277                 if entry.state != entry.StateEnded:
 278                         self.timeChanged(entry)
 279
 280                 print "state: ", entry.state
 281                 print "in processed: ", entry in self.processed_timers
 282                 print "in running: ", entry in self.timer_list
 283                 # now the timer should be in the processed_timers list. remove it from there.
 284                 self.processed_timers.remove(entry)
 285
 286         def shutdown(self):
 287                 self.saveTimer()