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