timer.py

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