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 import calendar
   6 import datetime
   7
   8 class TimerEntry:
   9         StateWaiting  = 0
  10         StatePrepared = 1
  11         StateRunning  = 2
  12         StateEnded    = 3
  13
  14         def __init__(self, begin, end):
  15                 self.begin = begin
  16                 self.prepare_time = 20
  17                 self.end = end
  18                 self.state = 0
  19                 self.resetRepeated()
  20                 self.backoff = 0
  21
  22                 self.disabled = False
  23
  24         def resetRepeated(self):
  25                 self.repeated = int(0)
  26
  27         def setRepeated(self, day):
  28                 self.repeated |= (2 ** day)
  29                 print "Repeated: " + str(self.repeated)
  30
  31         def isRunning(self):
  32                 return self.state == self.StateRunning
  33
  34         def addOneDay(self, timedatestruct):
  35                 oldHour = timedatestruct.tm_hour
  36                 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()
  37                 if localtime(mktime(newdate)).tm_hour != oldHour:
  38                         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()
  39                 return newdate
  40
  41         # update self.begin and self.end according to the self.repeated-flags
  42         def processRepeated(self, findRunningEvent = True):
  43                 print "ProcessRepeated"
  44                 if (self.repeated != 0):
  45                         now = int(time()) + 1
  46
  47                         #to avoid problems with daylight saving, we need to calculate with localtime, in struct_time representation
  48                         localbegin = localtime(self.begin)
  49                         localend = localtime(self.end)
  50                         localnow = localtime(now)
  51
  52                         print "localbegin:", strftime("%c", localbegin)
  53                         print "localend:", strftime("%c", localend)
  54
  55                         day = []
  56                         flags = self.repeated
  57                         for x in range(0, 7):
  58                                 if (flags & 1 == 1):
  59                                         day.append(0)
  60                                         print "Day: " + str(x)
  61                                 else:
  62                                         day.append(1)
  63                                 flags = flags >> 1
  64
  65                         print strftime("%c", localnow)
  66
  67                         while ((day[localbegin.tm_wday] != 0) or ((day[localbegin.tm_wday] == 0) and ((findRunningEvent and localend < localnow) or ((not findRunningEvent) and localbegin < localnow)))):
  68                                 localbegin = self.addOneDay(localbegin)
  69                                 localend = self.addOneDay(localend)
  70                                 print "localbegin after addOneDay:", strftime("%c", localbegin)
  71                                 print "localend after addOneDay:", strftime("%c", localend)
  72
  73                         #we now have a struct_time representation of begin and end in localtime, but we have to calculate back to (gmt) seconds since epoch
  74                         self.begin = int(mktime(localbegin))
  75                         self.end = int(mktime(localend)) + 1
  76
  77                         print "ProcessRepeated result"
  78                         print strftime("%c", localtime(self.begin))
  79                         print strftime("%c", localtime(self.end))
  80
  81                         self.timeChanged()
  82
  83         def __lt__(self, o):
  84                 return self.getNextActivation() < o.getNextActivation()
  85
  86         # must be overridden
  87         def activate(self):
  88                 pass
  89
  90         # can be overridden
  91         def timeChanged(self):
  92                 pass
  93
  94         # check if a timer entry must be skipped
  95         def shouldSkip(self):
  96                 return self.end <= time() and self.state == TimerEntry.StateWaiting
  97
  98         def abort(self):
  99                 self.end = time()
 100
 101                 # in case timer has not yet started, but gets aborted (so it's preparing),
 102                 # set begin to now.
 103                 if self.begin > self.end:
 104                         self.begin = self.end
 105
 106                 self.cancelled = True
 107
 108         # must be overridden!
 109         def getNextActivation():
 110                 pass
 111
 112         def disable(self):
 113                 self.disabled = True
 114
 115         def enable(self):
 116                 self.disabled = False
 117
 118 class Timer:
 119         # the time between "polls". We do this because
 120         # we want to account for time jumps etc.
 121         # of course if they occur <100s before starting,
 122         # it's not good. thus, you have to repoll when
 123         # you change the time.
 124         #
 125         # this is just in case. We don't want the timer
 126         # hanging. we use this "edge-triggered-polling-scheme"
 127         # anyway, so why don't make it a bit more fool-proof?
 128         MaxWaitTime = 100
 129
 130         def __init__(self):
 131                 self.timer_list = [ ]
 132                 self.processed_timers = [ ]
 133
 134                 self.timer = eTimer()
 135                 self.timer.timeout.get().append(self.calcNextActivation)
 136                 self.lastActivation = time()
 137
 138                 self.calcNextActivation()
 139                 self.on_state_change = [ ]
 140
 141         def stateChanged(self, entry):
 142                 for f in self.on_state_change:
 143                         f(entry)
 144
 145         def cleanup(self):
 146                 self.processed_timers = [entry for entry in self.processed_timers if entry.disabled]
 147
 148         def addTimerEntry(self, entry, noRecalc=0):
 149                 entry.processRepeated()
 150
 151                 # when the timer has not yet started, and is already passed,
 152                 # don't go trough waiting/running/end-states, but sort it
 153                 # right into the processedTimers.
 154                 if entry.shouldSkip() or entry.state == TimerEntry.StateEnded or (entry.state == TimerEntry.StateWaiting and entry.disabled):
 155                         print "already passed, skipping"
 156                         print "shouldSkip:", entry.shouldSkip()
 157                         print "state == ended", entry.state == TimerEntry.StateEnded
 158                         print "waiting && disabled:", (entry.state == TimerEntry.StateWaiting and entry.disabled)
 159                         insort(self.processed_timers, entry)
 160                         entry.state = TimerEntry.StateEnded
 161                 else:
 162                         insort(self.timer_list, entry)
 163                         if not noRecalc:
 164                                 self.calcNextActivation()
 165
 166         def setNextActivation(self, when):
 167                 delay = int((when - time()) * 1000)
 168                 print "[timer.py] next activation: %d (in %d ms)" % (when, delay)
 169
 170                 self.timer.start(delay, 1)
 171                 self.next = when
 172
 173         def calcNextActivation(self):
 174                 if self.lastActivation > time():
 175                         print "[timer.py] timewarp - re-evaluating all processed timers."
 176                         tl = self.processed_timers
 177                         self.processed_timers = [ ]
 178                         for x in tl:
 179                                 # simulate a "waiting" state to give them a chance to re-occure
 180                                 x.resetState()
 181                                 self.addTimerEntry(x, noRecalc=1)
 182
 183                 self.processActivation()
 184                 self.lastActivation = time()
 185
 186                 min = int(time()) + self.MaxWaitTime
 187
 188                 # calculate next activation point
 189                 if len(self.timer_list):
 190                         w = self.timer_list[0].getNextActivation()
 191                         if w < min:
 192                                 min = w
 193
 194                 self.setNextActivation(min)
 195
 196         def timeChanged(self, timer):
 197                 print "time changed"
 198                 timer.timeChanged()
 199                 if timer.state == TimerEntry.StateEnded:
 200                         self.processed_timers.remove(timer)
 201                 else:
 202                         self.timer_list.remove(timer)
 203
 204                 # give the timer a chance to re-enqueue
 205                 if timer.state == TimerEntry.StateEnded:
 206                         timer.state = TimerEntry.StateWaiting
 207                 self.addTimerEntry(timer)
 208
 209         def doActivate(self, w):
 210                 self.timer_list.remove(w)
 211
 212                 # when activating a timer which has already passed,
 213                 # simply abort the timer. don't run trough all the stages.
 214                 if w.shouldSkip():
 215                         w.state = TimerEntry.StateEnded
 216                 else:
 217                         # when active returns true, this means "accepted".
 218                         # otherwise, the current state is kept.
 219                         # the timer entry itself will fix up the delay then.
 220                         if w.activate():
 221                                 w.state += 1
 222
 223                 # did this timer reached the last state?
 224                 if w.state < TimerEntry.StateEnded:
 225                         # no, sort it into active list
 226                         insort(self.timer_list, w)
 227                 else:
 228                         # yes. Process repeated, and re-add.
 229                         if w.repeated:
 230                                 w.processRepeated()
 231                                 w.state = TimerEntry.StateWaiting
 232                                 self.addTimerEntry(w)
 233                         else:
 234                                 insort(self.processed_timers, w)
 235
 236                 self.stateChanged(w)
 237
 238         def processActivation(self):
 239                 print "It's now ", strftime("%c", localtime(time()))
 240                 t = int(time()) + 1
 241
 242                 # we keep on processing the first entry until it goes into the future.
 243                 while len(self.timer_list) and self.timer_list[0].getNextActivation() < t:
 244                         self.doActivate(self.timer_list[0])