timer.py

   1 from bisect import insort
   2 from time import strftime, time, localtime, gmtime, mktime
   3 from calendar import timegm
   4 from enigma import eTimer
   5
   6 class TimerEntry:
   7         StateWaiting  = 0
   8         StatePrepared = 1
   9         StateRunning  = 2
  10         StateEnded    = 3
  11
  12         def __init__(self, begin, end):
  13                 self.begin = begin
  14                 self.prepare_time = 20
  15                 self.end = end
  16                 self.state = 0
  17                 self.resetRepeated()
  18                 self.backoff = 0
  19
  20                 self.disabled = False
  21
  22         def resetRepeated(self):
  23                 self.repeated = int(0)
  24
  25         def setRepeated(self, day):
  26                 self.repeated |= (2 ** day)
  27                 print "Repeated: " + str(self.repeated)
  28
  29         def isRunning(self):
  30                 return self.state == self.StateRunning
  31
  32         # update self.begin and self.end according to the self.repeated-flags
  33         def processRepeated(self):
  34                 print "ProcessRepeated"
  35                 if (self.repeated != 0):
  36                         now = int(time()) + 1
  37
  38                         #to avoid problems with daylight saving, we need to calculate with localtime, in struct_time representation
  39                         localbegin = localtime(self.begin)
  40                         localend = localtime(self.end)
  41                         localnow = localtime(now)
  42
  43                         print strftime("%c", localbegin)
  44                         print strftime("%c", localend)
  45
  46                         day = []
  47                         flags = self.repeated
  48                         for x in range(0, 7):
  49                                 if (flags & 1 == 1):
  50                                         day.append(0)
  51                                         print "Day: " + str(x)
  52                                 else:
  53                                         day.append(1)
  54                                 flags = flags >> 1
  55
  56                         print strftime("%c", localnow)
  57                         while ((day[localbegin.tm_wday] != 0) or ((day[localbegin.tm_wday] == 0) and localend < localnow)):
  58                                 print strftime("%c", localbegin)
  59                                 print strftime("%c", localend)
  60                                 #add one day to the struct_time, we have to convert using gmt functions, because the daylight saving flag might change after we add our 86400 seconds
  61                                 localbegin = gmtime(timegm(localbegin) + 86400)
  62                                 localend = gmtime(timegm(localend) + 86400)
  63
  64                         #we now have a struct_time representation of begin and end in localtime, but we have to calculate back to (gmt) seconds since epoch
  65                         self.begin = int(mktime(localbegin))
  66                         self.end = int(mktime(localend)) + 1
  67
  68                         print "ProcessRepeated result"
  69                         print strftime("%c", localtime(self.begin))
  70                         print strftime("%c", localtime(self.end))
  71
  72                         self.timeChanged()
  73
  74         def __lt__(self, o):
  75                 return self.getNextActivation() < o.getNextActivation()
  76
  77         # must be overridden
  78         def activate(self):
  79                 pass
  80
  81         # can be overridden
  82         def timeChanged(self):
  83                 pass
  84
  85         # check if a timer entry must be skipped
  86         def shouldSkip(self):
  87                 return self.end <= time() and self.state == TimerEntry.StateWaiting
  88
  89         def abort(self):
  90                 self.end = time()
  91
  92                 # in case timer has not yet started, but gets aborted (so it's preparing),
  93                 # set begin to now.
  94                 if self.begin > self.end:
  95                         self.begin = self.end
  96
  97                 self.cancelled = True
  98
  99         # must be overridden!
 100         def getNextActivation():
 101                 pass
 102
 103         def disable(self):
 104                 self.disabled = True
 105
 106         def enable(self):
 107                 self.disabled = False
 108
 109 class Timer:
 110         # the time between "polls". We do this because
 111         # we want to account for time jumps etc.
 112         # of course if they occur <100s before starting,
 113         # it's not good. thus, you have to repoll when
 114         # you change the time.
 115         #
 116         # this is just in case. We don't want the timer
 117         # hanging. we use this "edge-triggered-polling-scheme"
 118         # anyway, so why don't make it a bit more fool-proof?
 119         MaxWaitTime = 100
 120
 121         def __init__(self):
 122                 self.timer_list = [ ]
 123                 self.processed_timers = [ ]
 124
 125                 self.timer = eTimer()
 126                 self.timer.timeout.get().append(self.calcNextActivation)
 127                 self.lastActivation = time()
 128
 129                 self.calcNextActivation()
 130                 self.on_state_change = [ ]
 131
 132         def stateChanged(self, entry):
 133                 for f in self.on_state_change:
 134                         f(entry)
 135
 136         def getNextRecordingTime(self):
 137                 if len(self.timer_list) > 0:
 138                         return self.timer_list[0].begin
 139                 return -1
 140
 141         def cleanup(self):
 142                 self.processed_timers = [entry for entry in self.processed_timers if entry.disabled]
 143
 144         def addTimerEntry(self, entry, noRecalc=0):
 145                 entry.processRepeated()
 146
 147                 # when the timer has not yet started, and is already passed,
 148                 # don't go trough waiting/running/end-states, but sort it
 149                 # right into the processedTimers.
 150                 if entry.shouldSkip() or entry.state == TimerEntry.StateEnded or (entry.state == TimerEntry.StateWaiting and entry.disabled):
 151                         print "already passed, skipping"
 152                         print "shouldSkip:", entry.shouldSkip()
 153                         print "state == ended", entry.state == TimerEntry.StateEnded
 154                         print "waiting && disabled:", (entry.state == TimerEntry.StateWaiting and entry.disabled)
 155                         insort(self.processed_timers, entry)
 156                         entry.state = TimerEntry.StateEnded
 157                 else:
 158                         insort(self.timer_list, entry)
 159                         if not noRecalc:
 160                                 self.calcNextActivation()
 161
 162         def setNextActivation(self, when):
 163                 delay = int((when - time()) * 1000)
 164                 print "[timer.py] next activation: %d (in %d ms)" % (when, delay)
 165
 166                 self.timer.start(delay, 1)
 167                 self.next = when
 168
 169         def calcNextActivation(self):
 170                 if self.lastActivation > time():
 171                         print "[timer.py] timewarp - re-evaluating all processed timers."
 172                         tl = self.processed_timers
 173                         self.processed_timers = [ ]
 174                         for x in tl:
 175                                 # simulate a "waiting" state to give them a chance to re-occure
 176                                 x.resetState()
 177                                 self.addTimerEntry(x, noRecalc=1)
 178
 179                 self.processActivation()
 180                 self.lastActivation = time()
 181
 182                 min = int(time()) + self.MaxWaitTime
 183
 184                 # calculate next activation point
 185                 if len(self.timer_list):
 186                         w = self.timer_list[0].getNextActivation()
 187                         if w < min:
 188                                 min = w
 189
 190                 self.setNextActivation(min)
 191
 192         def timeChanged(self, timer):
 193                 print "time changed"
 194                 timer.timeChanged()
 195                 if timer.state == TimerEntry.StateEnded:
 196                         self.processed_timers.remove(timer)
 197                 else:
 198                         self.timer_list.remove(timer)
 199
 200                 # give the timer a chance to re-enqueue
 201                 if timer.state == TimerEntry.StateEnded:
 202                         timer.state = TimerEntry.StateWaiting
 203                 self.addTimerEntry(timer)
 204
 205         def doActivate(self, w):
 206                 self.timer_list.remove(w)
 207
 208                 # when activating a timer which has already passed,
 209                 # simply abort the timer. don't run trough all the stages.
 210                 if w.shouldSkip():
 211                         w.state = TimerEntry.StateEnded
 212                 else:
 213                         # when active returns true, this means "accepted".
 214                         # otherwise, the current state is kept.
 215                         # the timer entry itself will fix up the delay then.
 216                         if w.activate():
 217                                 w.state += 1
 218
 219                 # did this timer reached the last state?
 220                 if w.state < TimerEntry.StateEnded:
 221                         # no, sort it into active list
 222                         insort(self.timer_list, w)
 223                 else:
 224                         # yes. Process repeated, and re-add.
 225                         if w.repeated:
 226                                 w.processRepeated()
 227                                 w.state = TimerEntry.StateWaiting
 228                                 self.addTimerEntry(w)
 229                         else:
 230                                 insort(self.processed_timers, w)
 231
 232                 self.stateChanged(w)
 233
 234         def processActivation(self):
 235                 print "It's now ", strftime("%c", localtime(time()))
 236                 t = int(time()) + 1
 237
 238                 # we keep on processing the first entry until it goes into the future.
 239                 while len(self.timer_list) and self.timer_list[0].getNextActivation() < t:
 240                         self.doActivate(self.timer_list[0])