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 # begin and end will be corrected
  26 def parseEvent(ev):
  27         name = ev.getEventName()
  28         description = ev.getShortDescription()
  29         begin = ev.getBeginTime()
  30         end = begin + ev.getDuration()
  31         eit = ev.getEventId()
  32         begin -= config.recording.margin_before.value[0] * 60
  33         end += config.recording.margin_after.value[0] * 60
  34         return (begin, end, name, description, eit)
  35
  36 # please do not translate log messages
  37 class RecordTimerEntry(timer.TimerEntry):
  38         def __init__(self, serviceref, begin, end, name, description, eit, disabled = False):
  39                 timer.TimerEntry.__init__(self, int(begin), int(end))
  40
  41                 assert isinstance(serviceref, ServiceReference)
  42
  43                 self.service_ref = serviceref
  44                 self.eit = eit
  45                 self.dontSave = False
  46                 self.name = name
  47                 self.description = description
  48                 self.disabled = disabled
  49                 self.timer = None
  50                 self.record_service = None
  51                 self.start_prepare = 0
  52
  53                 self.log_entries = []
  54                 self.resetState()
  55
  56         def log(self, code, msg):
  57                 self.log_entries.append((int(time.time()), code, msg))
  58                 print "[TIMER]", msg
  59
  60         def resetState(self):
  61                 self.state = self.StateWaiting
  62                 self.first_try_prepare = True
  63                 self.timeChanged()
  64
  65         def calculateFilename(self):
  66                 service_name = self.service_ref.getServiceName()
  67                 begin_date = time.strftime("%Y%m%d %H%M", time.localtime(self.begin))
  68
  69                 print "begin_date: ", begin_date
  70                 print "service_name: ", service_name
  71                 print "name:", self.name
  72                 print "description: ", self.description
  73
  74                 filename = begin_date + " - " + service_name
  75                 if self.name:
  76                         filename += " - " + self.name
  77
  78                 self.Filename = Directories.getRecordingFilename(filename)
  79                 self.log(0, "Filename calculated as: '%s'" % self.Filename)
  80                 #begin_date + " - " + service_name + description)
  81
  82         def tryPrepare(self):
  83                 self.calculateFilename()
  84                 self.record_service = NavigationInstance.instance.recordService(self.service_ref)
  85                 if self.record_service == None:
  86                         self.log(1, "'record service' failed")
  87                         return False
  88                 else:
  89                         prep_res = self.record_service.prepare(self.Filename + ".ts")
  90                         if prep_res:
  91                                 self.log(2, "'prepare' failed: error %d" % prep_res)
  92                                 self.record_service = None
  93                                 return False
  94
  95                         self.log(3, "prepare ok, writing meta information to %s" % self.Filename)
  96                         try:
  97                                 f = open(self.Filename + ".ts.meta", "w")
  98                                 f.write(str(self.service_ref) + "\n")
  99                                 f.write(self.name + "\n")
 100                                 f.write(self.description + "\n")
 101                                 f.write(str(self.begin) + "\n")
 102                                 f.close()
 103                         except:
 104                                 self.log(4, "failed to write meta information")
 105                         return True
 106
 107         def do_backoff(self):
 108                 if self.backoff == 0:
 109                         self.backoff = 5
 110                 else:
 111                         self.backoff *= 2
 112                         if self.backoff > 100:
 113                                 self.backoff = 100
 114                 self.log(10, "backoff: retry in %d seconds" % self.backoff)
 115
 116         def activate(self):
 117                 next_state = self.state + 1
 118                 self.log(5, "activating state %d" % next_state)
 119
 120                 if next_state == self.StatePrepared:
 121                         if self.tryPrepare():
 122                                 self.log(6, "prepare ok, waiting for begin")
 123                                 # fine. it worked, resources are allocated.
 124                                 self.next_activation = self.begin
 125                                 self.backoff = 0
 126                                 return True
 127
 128                         self.log(7, "prepare failed")
 129                         if self.first_try_prepare:
 130                                 self.first_try_prepare = False
 131                                 if config.recording.asktozap.value == 0:
 132                                         self.log(8, "asking user to zap away")
 133                                         Notifications.AddNotificationWithCallback(self.failureCB, MessageBox, _("A timer failed to record!\nDisable TV and try again?\n"))
 134                                 else: # zap without asking
 135                                         self.log(9, "zap without asking")
 136                                         self.failureCB(True)
 137
 138                         self.do_backoff()
 139                         # retry
 140                         self.start_prepare = time.time() + self.backoff
 141                         return False
 142                 elif next_state == self.StateRunning:
 143                         self.log(11, "start recording")
 144                         record_res = self.record_service.start()
 145
 146                         if record_res:
 147                                 self.log(13, "start record returned %d" % record_res)
 148                                 self.do_backoff()
 149                                 # retry
 150                                 self.begin = time.time() + self.backoff
 151                                 return False
 152
 153                         return True
 154                 elif next_state == self.StateEnded:
 155                         self.log(12, "stop recording")
 156                         self.record_service.stop()
 157                         self.record_service = None
 158                         return True
 159
 160         def getNextActivation(self):
 161                 if self.state == self.StateEnded:
 162                         return self.end
 163
 164                 next_state = self.state + 1
 165
 166                 return {self.StatePrepared: self.start_prepare,
 167                                 self.StateRunning: self.begin,
 168                                 self.StateEnded: self.end }[next_state]
 169
 170         def failureCB(self, answer):
 171                 if answer == True:
 172                         self.log(13, "ok, zapped away")
 173                         #NavigationInstance.instance.stopUserServices()
 174                         NavigationInstance.instance.playService(self.service_ref.ref)
 175                 else:
 176                         self.log(14, "user didn't want to zap away, record will probably fail")
 177
 178         def timeChanged(self):
 179                 old_prepare = self.start_prepare
 180                 self.start_prepare = self.begin - self.prepare_time
 181                 self.backoff = 0
 182
 183                 if old_prepare != self.start_prepare:
 184                         self.log(15, "record time changed, start prepare is now: %s" % time.ctime(self.start_prepare))
 185
 186 def createTimer(xml):
 187         begin = int(xml.getAttribute("begin"))
 188         end = int(xml.getAttribute("end"))
 189         serviceref = ServiceReference(str(xml.getAttribute("serviceref")))
 190         description = xml.getAttribute("description").encode("utf-8")
 191         repeated = xml.getAttribute("repeated").encode("utf-8")
 192         try:
 193                 disabled = eval(xml.getAttribute("disabled"))
 194         except:
 195                 disabled = False
 196         try:
 197                 eit = long(xml.getAttribute("eit").encode("utf-8"))
 198         except:
 199                 eit = None
 200         name = xml.getAttribute("name").encode("utf-8")
 201         #filename = xml.getAttribute("filename").encode("utf-8")
 202         entry = RecordTimerEntry(serviceref, begin, end, name, description, eit, disabled)
 203         entry.repeated = int(repeated)
 204
 205         for l in elementsWithTag(xml.childNodes, "log"):
 206                 time = int(l.getAttribute("time"))
 207                 code = int(l.getAttribute("code"))
 208                 msg = mergeText(l.childNodes).strip().encode("utf-8")
 209                 entry.log_entries.append((time, code, msg))
 210
 211         return entry
 212
 213 class RecordTimer(timer.Timer):
 214         def __init__(self):
 215                 timer.Timer.__init__(self)
 216
 217                 self.Filename = Directories.resolveFilename(Directories.SCOPE_CONFIG, "timers.xml")
 218
 219                 try:
 220                         self.loadTimer()
 221                 except IOError:
 222                         print "unable to load timers from file!"
 223
 224         def isRecording(self):
 225                 isRunning = False
 226                 for timer in self.timer_list:
 227                         if timer.isRunning():
 228                                 isRunning = True
 229                 return isRunning
 230
 231         def loadTimer(self):
 232                 # TODO: PATH!
 233                 doc = xml.dom.minidom.parse(self.Filename)
 234
 235                 root = doc.childNodes[0]
 236                 for timer in elementsWithTag(root.childNodes, "timer"):
 237                         self.record(createTimer(timer))
 238
 239         def strToXML(self, str):
 240                 return str.replace('&', '&amp;').replace('<', '&lt;').replace('>', '&gt;').replace("'", '&apos;'). replace('"', '&qout;')
 241
 242         def saveTimer(self):
 243                 #doc = xml.dom.minidom.Document()
 244                 #root_element = doc.createElement('timers')
 245                 #doc.appendChild(root_element)
 246                 #root_element.appendChild(doc.createTextNode("\n"))
 247
 248                 #for timer in self.timer_list + self.processed_timers:
 249                         # some timers (instant records) don't want to be saved.
 250                         # skip them
 251                         #if timer.dontSave:
 252                                 #continue
 253                         #t = doc.createTextNode("\t")
 254                         #root_element.appendChild(t)
 255                         #t = doc.createElement('timer')
 256                         #t.setAttribute("begin", str(int(timer.begin)))
 257                         #t.setAttribute("end", str(int(timer.end)))
 258                         #t.setAttribute("serviceref", str(timer.service_ref))
 259                         #t.setAttribute("repeated", str(timer.repeated))
 260                         #t.setAttribute("name", timer.name)
 261                         #t.setAttribute("description", timer.description)
 262                         #t.setAttribute("eit", str(timer.eit))
 263
 264                         #for time, code, msg in timer.log_entries:
 265                                 #t.appendChild(doc.createTextNode("\t\t"))
 266                                 #l = doc.createElement('log')
 267                                 #l.setAttribute("time", str(time))
 268                                 #l.setAttribute("code", str(code))
 269                                 #l.appendChild(doc.createTextNode(msg))
 270                                 #t.appendChild(l)
 271                                 #t.appendChild(doc.createTextNode("\n"))
 272
 273                         #root_element.appendChild(t)
 274                         #t = doc.createTextNode("\n")
 275                         #root_element.appendChild(t)
 276
 277
 278                 #file = open(self.Filename, "w")
 279                 #doc.writexml(file)
 280                 #file.write("\n")
 281                 #file.close()
 282
 283                 list = []
 284
 285                 list.append('<?xml version="1.0" ?>\n')
 286                 list.append('<timers>\n')
 287
 288                 for timer in self.timer_list + self.processed_timers:
 289                         if timer.dontSave:
 290                                 continue
 291
 292                         list.append('<timer')
 293                         list.append(' begin="' + str(int(timer.begin)) + '"')
 294                         list.append(' end="' + str(int(timer.end)) + '"')
 295                         list.append(' serviceref="' + str(timer.service_ref) + '"')
 296                         list.append(' repeated="' + str(int(timer.repeated)) + '"')
 297                         list.append(' name="' + str(self.strToXML(timer.name)) + '"')
 298                         list.append(' description="' + str(self.strToXML(timer.description)) + '"')
 299                         list.append(' eit="' + str(timer.eit) + '"')
 300                         list.append(' disabled="' + str(int(timer.disabled)) + '"')
 301                         list.append('>\n')
 302
 303                         for time, code, msg in timer.log_entries:
 304                                 list.append('<log')
 305                                 list.append(' code="' + str(code) + '"')
 306                                 list.append(' time="' + str(time) + '"')
 307                                 list.append('>')
 308                                 list.append(str(msg))
 309                                 list.append('</log>\n')
 310
 311
 312                         list.append('</timer>\n')
 313
 314                 list.append('</timers>\n')
 315
 316                 file = open(self.Filename, "w")
 317                 for x in list:
 318                         file.write(x)
 319                 file.close()
 320
 321         def record(self, entry):
 322                 entry.timeChanged()
 323                 print "[Timer] Record " + str(entry)
 324                 entry.Timer = self
 325                 self.addTimerEntry(entry)
 326
 327         def removeEntry(self, entry):
 328                 print "[Timer] Remove " + str(entry)
 329
 330                 # avoid re-enqueuing
 331                 entry.repeated = False
 332
 333                 # abort timer.
 334                 # this sets the end time to current time, so timer will be stopped.
 335                 entry.abort()
 336
 337                 if entry.state != entry.StateEnded:
 338                         self.timeChanged(entry)
 339
 340                 print "state: ", entry.state
 341                 print "in processed: ", entry in self.processed_timers
 342                 print "in running: ", entry in self.timer_list
 343                 # now the timer should be in the processed_timers list. remove it from there.
 344                 self.processed_timers.remove(entry)
 345
 346         def shutdown(self):
 347                 self.saveTimer()