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 resetState(self):
  26                 self.state = self.StateWaiting
  27                 self.cancelled = False
  28                 self.first_try_prepare = True
  29                 self.timeChanged()
  30
  31         def resetRepeated(self):
  32                 self.repeated = int(0)
  33
  34         def setRepeated(self, day):
  35                 self.repeated |= (2 ** day)
  36                 print "Repeated: " + str(self.repeated)
  37
  38         def isRunning(self):
  39                 return self.state == self.StateRunning
  40
  41         def addOneDay(self, timedatestruct):
  42                 oldHour = timedatestruct.tm_hour
  43                 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()
  44                 if localtime(mktime(newdate)).tm_hour != oldHour:
  45                         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()
  46                 return newdate
  47
  48         # update self.begin and self.end according to the self.repeated-flags
  49         def processRepeated(self, findRunningEvent = True):
  50                 print "ProcessRepeated"
  51                 if (self.repeated != 0):
  52                         now = int(time()) + 1
  53
  54                         #to avoid problems with daylight saving, we need to calculate with localtime, in struct_time representation
  55                         localrepeatedbegindate = localtime(self.repeatedbegindate)
  56                         localbegin = localtime(self.begin)
  57                         localend = localtime(self.end)
  58                         localnow = localtime(now)
  59
  60                         print "localrepeatedbegindate:", strftime("%c", localrepeatedbegindate)
  61                         print "localbegin:", strftime("%c", localbegin)
  62                         print "localend:", strftime("%c", localend)
  63                         print "localnow:", strftime("%c", localnow)
  64
  65                         day = []
  66                         flags = self.repeated
  67                         for x in range(0, 7):
  68                                 if (flags & 1 == 1):
  69                                         day.append(0)
  70                                         print "Day: " + str(x)
  71                                 else:
  72                                         day.append(1)
  73                                 flags = flags >> 1
  74
  75                         # if day is NOT in the list of repeated days
  76                         # 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
  77                         while ((day[localbegin.tm_wday] != 0) or (mktime(localrepeatedbegindate) > mktime(localbegin))  or
  78                                 ((day[localbegin.tm_wday] == 0) and ((findRunningEvent and localend < localnow) or ((not findRunningEvent) and localbegin < localnow)))):
  79                                 localbegin = self.addOneDay(localbegin)
  80                                 localend = self.addOneDay(localend)
  81                                 print "localbegin after addOneDay:", strftime("%c", localbegin)
  82                                 print "localend after addOneDay:", strftime("%c", localend)
  83
  84                         #we now have a struct_time representation of begin and end in localtime, but we have to calculate back to (gmt) seconds since epoch
  85                         self.begin = int(mktime(localbegin))
  86                         self.end = int(mktime(localend))
  87                         if self.begin == self.end:
  88                                 self.end += 1
  89
  90                         print "ProcessRepeated result"
  91                         print strftime("%c", localtime(self.begin))
  92                         print strftime("%c", localtime(self.end))
  93
  94                         self.timeChanged()
  95
  96         def __lt__(self, o):
  97                 return self.getNextActivation() < o.getNextActivation()
  98
  99         # must be overridden
 100         def activate(self):
 101                 pass
 102
 103         # can be overridden
 104         def timeChanged(self):
 105                 pass
 106
 107         # check if a timer entry must be skipped
 108         def shouldSkip(self):
 109                 return self.end <= time() and self.state == TimerEntry.StateWaiting
 110
 111         def abort(self):
 112                 self.end = time()
 113
 114                 # in case timer has not yet started, but gets aborted (so it's preparing),
 115                 # set begin to now.
 116                 if self.begin > self.end:
 117                         self.begin = self.end
 118
 119                 self.cancelled = True
 120
 121         # must be overridden!
 122         def getNextActivation():
 123                 pass
 124
 125         def disable(self):
 126                 self.disabled = True
 127
 128         def enable(self):
 129                 self.disabled = False
 130
 131 class Timer:
 132         # the time between "polls". We do this because
 133         # we want to account for time jumps etc.
 134         # of course if they occur <100s before starting,
 135         # it's not good. thus, you have to repoll when
 136         # you change the time.
 137         #
 138         # this is just in case. We don't want the timer
 139         # hanging. we use this "edge-triggered-polling-scheme"
 140         # anyway, so why don't make it a bit more fool-proof?
 141         MaxWaitTime = 100
 142
 143         def __init__(self):
 144                 self.timer_list = [ ]
 145                 self.processed_timers = [ ]
 146
 147                 self.timer = eTimer()
 148                 self.timer.callback.append(self.calcNextActivation)
 149                 self.lastActivation = time()
 150
 151                 self.calcNextActivation()
 152                 self.on_state_change = [ ]
 153
 154         def stateChanged(self, entry):
 155                 for f in self.on_state_change:
 156                         f(entry)
 157
 158         def cleanup(self):
 159                 self.processed_timers = [entry for entry in self.processed_timers if entry.disabled]
 160
 161         def addTimerEntry(self, entry, noRecalc=0):
 162                 entry.processRepeated()
 163
 164                 # when the timer has not yet started, and is already passed,
 165                 # don't go trough waiting/running/end-states, but sort it
 166                 # right into the processedTimers.
 167                 if entry.shouldSkip() or entry.state == TimerEntry.StateEnded or (entry.state == TimerEntry.StateWaiting and entry.disabled):
 168                         print "already passed, skipping"
 169                         print "shouldSkip:", entry.shouldSkip()
 170                         print "state == ended", entry.state == TimerEntry.StateEnded
 171                         print "waiting && disabled:", (entry.state == TimerEntry.StateWaiting and entry.disabled)
 172                         insort(self.processed_timers, entry)
 173                         entry.state = TimerEntry.StateEnded
 174                 else:
 175                         insort(self.timer_list, entry)
 176                         if not noRecalc:
 177                                 self.calcNextActivation()
 178
 179         def setNextActivation(self, when):
 180                 delay = int((when - time()) * 1000)
 181                 print "[timer.py] next activation: %d (in %d ms)" % (when, delay)
 182
 183                 self.timer.start(delay, 1)
 184                 self.next = when
 185
 186         def calcNextActivation(self):
 187                 if self.lastActivation > time():
 188                         print "[timer.py] timewarp - re-evaluating all processed timers."
 189                         tl = self.processed_timers
 190                         self.processed_timers = [ ]
 191                         for x in tl:
 192                                 # simulate a "waiting" state to give them a chance to re-occure
 193                                 x.resetState()
 194                                 self.addTimerEntry(x, noRecalc=1)
 195
 196                 self.processActivation()
 197                 self.lastActivation = time()
 198
 199                 min = int(time()) + self.MaxWaitTime
 200
 201                 # calculate next activation point
 202                 if len(self.timer_list):
 203                         w = self.timer_list[0].getNextActivation()
 204                         if w < min:
 205                                 min = w
 206                         else:
 207                                 print "next real activation is", strftime("%c", localtime(w))
 208
 209                 self.setNextActivation(min)
 210
 211         def timeChanged(self, timer):
 212                 print "time changed"
 213                 timer.timeChanged()
 214                 if timer.state == TimerEntry.StateEnded:
 215                         self.processed_timers.remove(timer)
 216                 else:
 217                         self.timer_list.remove(timer)
 218
 219                 # give the timer a chance to re-enqueue
 220                 if timer.state == TimerEntry.StateEnded:
 221                         timer.state = TimerEntry.StateWaiting
 222                 self.addTimerEntry(timer)
 223
 224         def doActivate(self, w):
 225                 self.timer_list.remove(w)
 226
 227                 # when activating a timer which has already passed,
 228                 # simply abort the timer. don't run trough all the stages.
 229                 if w.shouldSkip():
 230                         w.state = TimerEntry.StateEnded
 231                 else:
 232                         # when active returns true, this means "accepted".
 233                         # otherwise, the current state is kept.
 234                         # the timer entry itself will fix up the delay then.
 235                         if w.activate():
 236                                 w.state += 1
 237
 238                 # did this timer reached the last state?
 239                 if w.state < TimerEntry.StateEnded:
 240                         # no, sort it into active list
 241                         insort(self.timer_list, w)
 242                 else:
 243                         # yes. Process repeated, and re-add.
 244                         if w.repeated:
 245                                 w.processRepeated()
 246                                 w.state = TimerEntry.StateWaiting
 247                                 self.addTimerEntry(w)
 248                         else:
 249                                 insort(self.processed_timers, w)
 250
 251                 self.stateChanged(w)
 252
 253         def processActivation(self):
 254                 print "It's now ", strftime("%c", localtime(time()))
 255                 t = int(time()) + 1
 256
 257                 # we keep on processing the first entry until it goes into the future.
 258                 while len(self.timer_list) and self.timer_list[0].getNextActivation() < t:
 259                         self.doActivate(self.timer_list[0])