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controller.py
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controller.py
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from views.abstracts import *
from struct import *
class FlashlightController(AbstractFlashlightController):
def __init__(self, view=None):
self.view = view
def get_sequence(self, tlv):
commands = self._decompose_tlv(tlv)
sequence = []
for c in commands:
sequence.append((Commands[c]["method"], commands[c]))
return sequence
def _decompose_tlv(self, tlv):
commands = dict()
chars = (char for char in tlv)
try:
for c in chars:
try:
command = unpack('>c', chr(c).encode())[0] # 1-byte
except error:
break
if command not in Commands:
pass
else:
t = command
length = ''.join([
chr(next(chars)), chr(next(chars))]).encode() # 2-byte
l = unpack('>h', length)[0]
v = None
if l == Commands[t]["length"] and l > 0:
v = [next(chars) for i in range(l)] # l-byte
if correct_tlv(t, l, v):
commands[t] = v
except StopIteration:
pass
return commands
def correct_tlv(t, l, v):
if t not in Commands:
return False
if Commands[t]["length"] != l:
return False
values_template = Commands[t]["value"]
for i in range(l):
if type(v[i]) is not values_template[i]:
return False
return True