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Ability to pass in a base converter #6

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Ability to pass in a base converter #6

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13 changes: 11 additions & 2 deletions simpleflake/simpleflake.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,10 +36,16 @@ def extract_bits(data, shift, length):
bitmask = ((1 << length) - 1) << shift
return ((data & bitmask) >> shift)


def dec_to_hex(val):
return hex(val).lstrip('0x').rstrip('L').upper()


# ==================================================


def simpleflake(timestamp=None, random_bits=None, epoch=SIMPLEFLAKE_EPOCH):
def simpleflake(timestamp=None, random_bits=None, epoch=SIMPLEFLAKE_EPOCH,
base_converter=None):
"""Generate a 64 bit, roughly-ordered, globally-unique ID."""
second_time = timestamp if timestamp is not None else time.time()
second_time -= epoch
Expand All @@ -50,7 +56,10 @@ def simpleflake(timestamp=None, random_bits=None, epoch=SIMPLEFLAKE_EPOCH):

flake = (millisecond_time << SIMPLEFLAKE_TIMESTAMP_SHIFT) + randomness

return flake
if base_converter:
return base_converter(flake)
else:
return flake


def parse_simpleflake(flake):
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7 changes: 7 additions & 0 deletions tests/test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,13 @@ def test_simpleflake_size(self):
flake = sf.simpleflake()
self.assertEquals(64, len(sf.binary(flake)))

def test_simpleflake_hex(self):
flake = sf.simpleflake(base_converter=sf.dec_to_hex)
allowed_chars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F']
self.assertTrue(set(flake).issubset(allowed_chars))
self.assertEquals(64, len(sf.binary(int(flake, 16))))

def test_simpleflake_parts_timestamp(self):
coolstamp = sf.SIMPLEFLAKE_EPOCH + 1234321.0
epoch_flake = sf.simpleflake(timestamp=coolstamp)
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