timer.py

   1 from bisect import insort
   2 from time import strftime, time, localtime, mktime
   3 from enigma import eTimer
   4 import datetime
   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                 #begindate = localtime(self.begin)
  19                 #newdate = datetime.datetime(begindate.tm_year, begindate.tm_mon, begindate.tm_mday 0, 0, 0);
  20                 self.repeatedbegindate = begin
  21                 self.backoff = 0
  22
  23                 self.disabled = False
  24
  25         def resetRepeated(self):
  26                 self.repeated = int(0)
  27
  28         def setRepeated(self, day):
  29                 self.repeated |= (2 ** day)
  30                 print "Repeated: " + str(self.repeated)
  31
  32         def isRunning(self):
  33                 return self.state == self.StateRunning
  34
  35         def addOneDay(self, timedatestruct):
  36                 oldHour = timedatestruct.tm_hour
  37                 newdate =  (datetime.datetime(timedatestruct.tm_year, timedatestruct.tm_mon, timedatestruct.tm_mday, timedatestruct.tm_hour, timedatestruct.tm_min, timedatestruct.tm_sec) + datetime.timedelta(days=1)).timetuple()
  38                 if localtime(mktime(newdate)).tm_hour != oldHour:
  39                         return (datetime.datetime(timedatestruct.tm_year, timedatestruct.tm_mon, timedatestruct.tm_mday, timedatestruct.tm_hour, timedatestruct.tm_min, timedatestruct.tm_sec) + datetime.timedelta(days=2)).timetuple()
  40                 return newdate
  41
  42         # update self.begin and self.end according to the self.repeated-flags
  43         def processRepeated(self, findRunningEvent = True):
  44                 print "ProcessRepeated"
  45                 if (self.repeated != 0):
  46                         now = int(time()) + 1
  47
  48                         #to avoid problems with daylight saving, we need to calculate with localtime, in struct_time representation
  49                         localrepeatedbegindate = localtime(self.repeatedbegindate)
  50                         localbegin = localtime(self.begin)
  51                         localend = localtime(self.end)
  52                         localnow = localtime(now)
  53
  54                         print "localrepeatedbegindate:", strftime("%c", localrepeatedbegindate)
  55                         print "localbegin:", strftime("%c", localbegin)
  56                         print "localend:", strftime("%c", localend)
  57                         print "localnow:", strftime("%c", localnow)
  58
  59                         day = []
  60                         flags = self.repeated
  61                         for x in range(0, 7):
  62                                 if (flags & 1 == 1):
  63                                         day.append(0)
  64                                         print "Day: " + str(x)
  65                                 else:
  66                                         day.append(1)
  67                                 flags = flags >> 1
  68
  69                         # if day is NOT in the list of repeated days
  70                         # OR if the day IS in the list of the repeated days, check, if event is currently running... then if findRunningEvent is false, go to the next event
  71                         while ((day[localbegin.tm_wday] != 0) or (mktime(localrepeatedbegindate) > mktime(localbegin))  or
  72                                 ((day[localbegin.tm_wday] == 0) and ((findRunningEvent and localend < localnow) or ((not findRunningEvent) and localbegin < localnow)))):
  73                                 localbegin = self.addOneDay(localbegin)
  74                                 localend = self.addOneDay(localend)
  75                                 print "localbegin after addOneDay:", strftime("%c", localbegin)
  76                                 print "localend after addOneDay:", strftime("%c", localend)
  77
  78                         #we now have a struct_time representation of begin and end in localtime, but we have to calculate back to (gmt) seconds since epoch
  79                         self.begin = int(mktime(localbegin))
  80                         self.end = int(mktime(localend))
  81                         if self.begin == self.end:
  82                                 self.end += 1
  83
  84                         print "ProcessRepeated result"
  85                         print strftime("%c", localtime(self.begin))
  86                         print strftime("%c", localtime(self.end))
  87
  88                         self.timeChanged()
  89
  90         def __lt__(self, o):
  91                 return self.getNextActivation() < o.getNextActivation()
  92
  93         # must be overridden
  94         def activate(self):
  95                 pass
  96
  97         # can be overridden
  98         def timeChanged(self):
  99                 pass
 100
 101         # check if a timer entry must be skipped
 102         def shouldSkip(self):
 103                 return self.end <= time() and self.state == TimerEntry.StateWaiting
 104
 105         def abort(self):
 106                 self.end = time()
 107
 108                 # in case timer has not yet started, but gets aborted (so it's preparing),
 109                 # set begin to now.
 110                 if self.begin > self.end:
 111                         self.begin = self.end
 112
 113                 self.cancelled = True
 114
 115         # must be overridden!
 116         def getNextActivation():
 117                 pass
 118
 119         def disable(self):
 120                 self.disabled = True
 121
 122         def enable(self):
 123                 self.disabled = False
 124
 125 class Timer:
 126         # the time between "polls". We do this because
 127         # we want to account for time jumps etc.
 128         # of course if they occur <100s before starting,
 129         # it's not good. thus, you have to repoll when
 130         # you change the time.
 131         #
 132         # this is just in case. We don't want the timer
 133         # hanging. we use this "edge-triggered-polling-scheme"
 134         # anyway, so why don't make it a bit more fool-proof?
 135         MaxWaitTime = 100
 136
 137         def __init__(self):
 138                 self.timer_list = [ ]
 139                 self.processed_timers = [ ]
 140
 141                 self.timer = eTimer()
 142                 self.timer.callback.append(self.calcNextActivation)
 143                 self.lastActivation = time()
 144
 145                 self.calcNextActivation()
 146                 self.on_state_change = [ ]
 147
 148         def stateChanged(self, entry):
 149                 for f in self.on_state_change:
 150                         f(entry)
 151
 152         def cleanup(self):
 153                 self.processed_timers = [entry for entry in self.processed_timers if entry.disabled]
 154
 155         def addTimerEntry(self, entry, noRecalc=0):
 156                 entry.processRepeated()
 157
 158                 # when the timer has not yet started, and is already passed,
 159                 # don't go trough waiting/running/end-states, but sort it
 160                 # right into the processedTimers.
 161                 if entry.shouldSkip() or entry.state == TimerEntry.StateEnded or (entry.state == TimerEntry.StateWaiting and entry.disabled):
 162                         print "already passed, skipping"
 163                         print "shouldSkip:", entry.shouldSkip()
 164                         print "state == ended", entry.state == TimerEntry.StateEnded
 165                         print "waiting && disabled:", (entry.state == TimerEntry.StateWaiting and entry.disabled)
 166                         insort(self.processed_timers, entry)
 167                         entry.state = TimerEntry.StateEnded
 168                 else:
 169                         insort(self.timer_list, entry)
 170                         if not noRecalc:
 171                                 self.calcNextActivation()
 172
 173         def setNextActivation(self, when):
 174                 delay = int((when - time()) * 1000)
 175                 print "[timer.py] next activation: %d (in %d ms)" % (when, delay)
 176
 177                 self.timer.start(delay, 1)
 178                 self.next = when
 179
 180         def calcNextActivation(self):
 181                 if self.lastActivation > time():
 182                         print "[timer.py] timewarp - re-evaluating all processed timers."
 183                         tl = self.processed_timers
 184                         self.processed_timers = [ ]
 185                         for x in tl:
 186                                 # simulate a "waiting" state to give them a chance to re-occure
 187                                 x.resetState()
 188                                 self.addTimerEntry(x, noRecalc=1)
 189
 190                 self.processActivation()
 191                 self.lastActivation = time()
 192
 193                 min = int(time()) + self.MaxWaitTime
 194
 195                 # calculate next activation point
 196                 if len(self.timer_list):
 197                         w = self.timer_list[0].getNextActivation()
 198                         if w < min:
 199                                 min = w
 200                         else:
 201                                 print "next real activation is", strftime("%c", localtime(w))
 202
 203                 self.setNextActivation(min)
 204
 205         def timeChanged(self, timer):
 206                 print "time changed"
 207                 timer.timeChanged()
 208                 if timer.state == TimerEntry.StateEnded:
 209                         self.processed_timers.remove(timer)
 210                 else:
 211                         self.timer_list.remove(timer)
 212
 213                 # give the timer a chance to re-enqueue
 214                 if timer.state == TimerEntry.StateEnded:
 215                         timer.state = TimerEntry.StateWaiting
 216                 self.addTimerEntry(timer)
 217
 218         def doActivate(self, w):
 219                 self.timer_list.remove(w)
 220
 221                 # when activating a timer which has already passed,
 222                 # simply abort the timer. don't run trough all the stages.
 223                 if w.shouldSkip():
 224                         w.state = TimerEntry.StateEnded
 225                 else:
 226                         # when active returns true, this means "accepted".
 227                         # otherwise, the current state is kept.
 228                         # the timer entry itself will fix up the delay then.
 229                         if w.activate():
 230                                 w.state += 1
 231
 232                 # did this timer reached the last state?
 233                 if w.state < TimerEntry.StateEnded:
 234                         # no, sort it into active list
 235                         insort(self.timer_list, w)
 236                 else:
 237                         # yes. Process repeated, and re-add.
 238                         if w.repeated:
 239                                 w.processRepeated()
 240                                 w.state = TimerEntry.StateWaiting
 241                                 self.addTimerEntry(w)
 242                         else:
 243                                 insort(self.processed_timers, w)
 244
 245                 self.stateChanged(w)
 246
 247         def processActivation(self):
 248                 print "It's now ", strftime("%c", localtime(time()))
 249                 t = int(time()) + 1
 250
 251                 # we keep on processing the first entry until it goes into the future.
 252                 while len(self.timer_list) and self.timer_list[0].getNextActivation() < t:
 253                         self.doActivate(self.timer_list[0])