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