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120 lines
2.8 KiB
Python
120 lines
2.8 KiB
Python
import abc
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import copy
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import random
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import pyparsing as pp
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from . import base
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class _Action(base.Token):
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"""
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An action that operates on the raw data stream of the message. All
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actions have one thing in common: an offset that specifies where the
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action should take place.
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"""
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def __init__(self, offset):
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self.offset = offset
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def resolve(self, settings, msg):
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"""
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Resolves offset specifications to a numeric offset. Returns a copy
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of the action object.
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"""
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c = copy.copy(self)
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l = msg.length(settings)
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if c.offset == "r":
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c.offset = random.randrange(l)
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elif c.offset == "a":
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c.offset = l + 1
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return c
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def __cmp__(self, other):
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return cmp(self.offset, other.offset)
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def __repr__(self):
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return self.spec()
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@abc.abstractmethod
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def spec(self): # pragma: no cover
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pass
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@abc.abstractmethod
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def intermediate(self, settings): # pragma: no cover
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pass
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class PauseAt(_Action):
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def __init__(self, offset, seconds):
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_Action.__init__(self, offset)
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self.seconds = seconds
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@classmethod
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def expr(klass):
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e = pp.Literal("p").suppress()
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e += base.Offset
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e += pp.Literal(",").suppress()
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e += pp.MatchFirst(
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[
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base.v_integer,
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pp.Literal("f")
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]
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)
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return e.setParseAction(lambda x: klass(*x))
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def spec(self):
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return "p%s,%s"%(self.offset, self.seconds)
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def intermediate(self, settings):
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return (self.offset, "pause", self.seconds)
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def freeze(self, settings):
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return self
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class DisconnectAt(_Action):
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def __init__(self, offset):
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_Action.__init__(self, offset)
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@classmethod
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def expr(klass):
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e = pp.Literal("d").suppress()
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e += base.Offset
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return e.setParseAction(lambda x: klass(*x))
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def spec(self):
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return "d%s"%self.offset
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def intermediate(self, settings):
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return (self.offset, "disconnect")
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def freeze(self, settings):
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return self
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class InjectAt(_Action):
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def __init__(self, offset, value):
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_Action.__init__(self, offset)
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self.value = value
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@classmethod
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def expr(klass):
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e = pp.Literal("i").suppress()
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e += base.Offset
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e += pp.Literal(",").suppress()
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e += base.Value
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return e.setParseAction(lambda x: klass(*x))
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def spec(self):
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return "i%s,%s"%(self.offset, self.value.spec())
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def intermediate(self, settings):
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return (
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self.offset,
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"inject",
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self.value.get_generator(settings)
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)
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def freeze(self, settings):
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return InjectAt(self.offset, self.value.freeze(settings))
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