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                 self.start_prepare = 0
  48
  49                 self.log_entries = []
  50                 self.resetState()
  51
  52         def log(self, code, msg):
  53                 self.log_entries.append((int(time.time()), code, msg))
  54                 print "[TIMER]", msg
  55
  56         def resetState(self):
  57                 self.state = self.StateWaiting
  58                 self.first_try_prepare = True
  59                 self.timeChanged()
  60
  61         def calculateFilename(self):
  62                 service_name = self.service_ref.getServiceName()
  63 #               begin_date = datetime.fromtimestamp(begin).strf...
  64                 begin_date = ""
  65
  66                 print "begin_date: ", begin_date
  67                 print "service_name: ", service_name
  68                 print "name:", self.name
  69                 print "description: ", self.description
  70
  71                 self.Filename = Directories.getRecordingFilename(service_name)
  72                 self.log(0, "Filename calculated as: '%s'" % self.Filename)
  73                 #begin_date + " - " + service_name + description)
  74
  75         def tryPrepare(self):
  76                 self.calculateFilename()
  77                 self.record_service = NavigationInstance.instance.recordService(self.service_ref)
  78                 if self.record_service == None:
  79                         self.log(1, "'record service' failed")
  80                         return False
  81                 else:
  82                         prep_res = self.record_service.prepare(self.Filename + ".ts")
  83                         if prep_res:
  84                                 self.log(2, "'prepare' failed: error %d" % prep_res)
  85                                 self.record_service = None
  86                                 return False
  87
  88                         self.log(3, "prepare ok, writing meta information to %s" % self.Filename)
  89                         try:
  90                                 f = open(self.Filename + ".ts.meta", "w")
  91                                 f.write(str(self.service_ref) + "\n")
  92                                 f.write(self.name + "\n")
  93                                 f.write(self.description + "\n")
  94                                 f.write(str(self.begin) + "\n")
  95                                 f.close()
  96                         except:
  97                                 self.log(4, "failed to write meta information")
  98                         return True
  99
 100         def do_backoff(self):
 101                 if self.backoff == 0:
 102                         self.backoff = 5
 103                 else:
 104                         self.backoff *= 2
 105                         if self.backoff > 100:
 106                                 self.backoff = 100
 107                 self.log(10, "backoff: retry in %d seconds" % self.backoff)
 108
 109         def activate(self):
 110                 next_state = self.state + 1
 111                 self.log(5, "activating state %d" % next_state)
 112
 113                 if next_state == self.StatePrepared:
 114                         if self.tryPrepare():
 115                                 self.log(6, "prepare ok, waiting for begin")
 116                                 # fine. it worked, resources are allocated.
 117                                 self.next_activation = self.begin
 118                                 self.backoff = 0
 119                                 return True
 120
 121                         self.log(7, "prepare failed")
 122                         if self.first_try_prepare:
 123                                 self.first_try_prepare = False
 124                                 if config.recording.asktozap.value == 0:
 125                                         self.log(8, "asking user to zap away")
 126                                         Notifications.AddNotificationWithCallback(self.failureCB, MessageBox, _("A timer failed to record!\nDisable TV and try again?\n"))
 127                                 else: # zap without asking
 128                                         self.log(9, "zap without asking")
 129                                         self.failureCB(True)
 130
 131                         self.do_backoff()
 132                         # retry
 133                         self.start_prepare = time.time() + self.backoff
 134                         return False
 135                 elif next_state == self.StateRunning:
 136                         self.log(11, "start recording")
 137                         record_res = self.record_service.start()
 138
 139                         if record_res:
 140                                 self.log(13, "start record returned %d" % record_res)
 141                                 self.do_backoff()
 142                                 # retry
 143                                 self.begin = time.time() + self.backoff
 144                                 return False
 145
 146                         return True
 147                 elif next_state == self.StateEnded:
 148                         self.log(12, "stop recording")
 149                         self.record_service.stop()
 150                         self.record_service = None
 151                         return True
 152
 153         def getNextActivation(self):
 154                 if self.state == self.StateEnded:
 155                         return self.end
 156
 157                 next_state = self.state + 1
 158
 159                 return {self.StatePrepared: self.start_prepare,
 160                                 self.StateRunning: self.begin,
 161                                 self.StateEnded: self.end }[next_state]
 162
 163         def failureCB(self, answer):
 164                 if answer == True:
 165                         self.log(13, "ok, zapped away")
 166                         #NavigationInstance.instance.stopUserServices()
 167                         NavigationInstance.instance.playService(self.service_ref.ref)
 168                 else:
 169                         self.log(14, "user didn't want to zap away, record will probably fail")
 170
 171         def timeChanged(self):
 172                 old_prepare = self.start_prepare
 173                 self.start_prepare = self.begin - self.prepare_time
 174                 self.backoff = 0
 175
 176                 if old_prepare != self.start_prepare:
 177                         self.log(15, "record time changed, start prepare is now: %s" % time.ctime(self.start_prepare))
 178
 179 def createTimer(xml):
 180         begin = int(xml.getAttribute("begin"))
 181         end = int(xml.getAttribute("end"))
 182         serviceref = ServiceReference(str(xml.getAttribute("serviceref")))
 183         description = xml.getAttribute("description").encode("utf-8")
 184         repeated = xml.getAttribute("repeated").encode("utf-8")
 185         eit = long(xml.getAttribute("eit").encode("utf-8"))
 186         name = xml.getAttribute("name").encode("utf-8")
 187         #filename = xml.getAttribute("filename").encode("utf-8")
 188         entry = RecordTimerEntry(serviceref, begin, end, name, description, eit)
 189         entry.repeated = int(repeated)
 190
 191         for l in elementsWithTag(xml.childNodes, "log"):
 192                 time = int(l.getAttribute("time"))
 193                 code = int(l.getAttribute("code"))
 194                 msg = mergeText(l.childNodes).strip()
 195                 entry.log_entries.append((time, code, msg))
 196
 197         return entry
 198
 199 class RecordTimer(timer.Timer):
 200         def __init__(self):
 201                 timer.Timer.__init__(self)
 202
 203                 self.Filename = Directories.resolveFilename(Directories.SCOPE_CONFIG, "timers.xml")
 204
 205                 try:
 206                         self.loadTimer()
 207                 except IOError:
 208                         print "unable to load timers from file!"
 209
 210         def isRecording(self):
 211                 isRunning = False
 212                 for timer in self.timer_list:
 213                         if timer.isRunning():
 214                                 isRunning = True
 215                 return isRunning
 216
 217         def loadTimer(self):
 218                 # TODO: PATH!
 219                 doc = xml.dom.minidom.parse(self.Filename)
 220
 221                 root = doc.childNodes[0]
 222                 for timer in elementsWithTag(root.childNodes, "timer"):
 223                         self.record(createTimer(timer))
 224
 225         def saveTimer(self):
 226                 #doc = xml.dom.minidom.Document()
 227                 #root_element = doc.createElement('timers')
 228                 #doc.appendChild(root_element)
 229                 #root_element.appendChild(doc.createTextNode("\n"))
 230
 231                 #for timer in self.timer_list + self.processed_timers:
 232                         # some timers (instant records) don't want to be saved.
 233                         # skip them
 234                         #if timer.dontSave:
 235                                 #continue
 236                         #t = doc.createTextNode("\t")
 237                         #root_element.appendChild(t)
 238                         #t = doc.createElement('timer')
 239                         #t.setAttribute("begin", str(int(timer.begin)))
 240                         #t.setAttribute("end", str(int(timer.end)))
 241                         #t.setAttribute("serviceref", str(timer.service_ref))
 242                         #t.setAttribute("repeated", str(timer.repeated))
 243                         #t.setAttribute("name", timer.name)
 244                         #t.setAttribute("description", timer.description)
 245                         #t.setAttribute("eit", str(timer.eit))
 246
 247                         #for time, code, msg in timer.log_entries:
 248                                 #t.appendChild(doc.createTextNode("\t\t"))
 249                                 #l = doc.createElement('log')
 250                                 #l.setAttribute("time", str(time))
 251                                 #l.setAttribute("code", str(code))
 252                                 #l.appendChild(doc.createTextNode(msg))
 253                                 #t.appendChild(l)
 254                                 #t.appendChild(doc.createTextNode("\n"))
 255
 256                         #root_element.appendChild(t)
 257                         #t = doc.createTextNode("\n")
 258                         #root_element.appendChild(t)
 259
 260
 261                 #file = open(self.Filename, "w")
 262                 #doc.writexml(file)
 263                 #file.write("\n")
 264                 #file.close()
 265
 266                 list = []
 267
 268                 list.append('<?xml version="1.0" ?>\n')
 269                 list.append('<timers>\n')
 270
 271                 for timer in self.timer_list + self.processed_timers:
 272                         list.append('<timer')
 273                         list.append(' begin="' + str(int(timer.begin)) + '"')
 274                         list.append(' end="' + str(int(timer.end)) + '"')
 275                         list.append(' serviceref="' + str(timer.service_ref) + '"')
 276                         list.append(' repeated="' + str(int(timer.repeated)) + '"')
 277                         list.append(' name="' + str(timer.name) + '"')
 278                         list.append(' description="' + str(timer.description) + '"')
 279                         list.append(' eit="' + str(timer.eit) + '"')
 280                         list.append('>\n')
 281
 282                         for time, code, msg in timer.log_entries:
 283                                 list.append('<log')
 284                                 list.append(' code="' + str(code) + '"')
 285                                 list.append(' time="' + str(time) + '"')
 286                                 list.append('>')
 287                                 list.append(str(msg))
 288                                 list.append('</log>\n')
 289
 290
 291                         list.append('</timer>\n')
 292
 293                 list.append('</timers>\n')
 294
 295                 file = open(self.Filename, "w")
 296                 for x in list:
 297                         file.write(x)
 298                 file.close()
 299
 300         def record(self, entry):
 301                 entry.timeChanged()
 302                 print "[Timer] Record " + str(entry)
 303                 entry.Timer = self
 304                 self.addTimerEntry(entry)
 305
 306         def removeEntry(self, entry):
 307                 print "[Timer] Remove " + str(entry)
 308
 309                 # avoid re-enqueuing
 310                 entry.repeated = False
 311
 312                 # abort timer.
 313                 # this sets the end time to current time, so timer will be stopped.
 314                 entry.abort()
 315
 316                 if entry.state != entry.StateEnded:
 317                         self.timeChanged(entry)
 318
 319                 print "state: ", entry.state
 320                 print "in processed: ", entry in self.processed_timers
 321                 print "in running: ", entry in self.timer_list
 322                 # now the timer should be in the processed_timers list. remove it from there.
 323                 self.processed_timers.remove(entry)
 324
 325         def shutdown(self):
 326                 self.saveTimer()