def __init__(self, question=None, timestamp=None):
if question is None:
self.question = self.generate_question()
else:
self.question = question
if timestamp is None:
self.timestamp = time.time()
else:
self.timestamp = timestamp
if not self.operators_display:
self.operators_display = {
"+": icon("plus.svg"),
"-": icon("minus.svg"),
"*": icon("close.svg"),
}
def __init__(self, question=None, timestamp=None):
if question is None:
self.question = self.generate_question()
else:
self.question = question
if timestamp is None:
self.timestamp = time.time()
else:
self.timestamp = timestamp
if not self.operators_display:
self.operators_display = {
'+': icon('plus.svg'),
'-': icon('minus.svg'),
'*': icon('close.svg'),
}
def get_plural_label(self, idx):
"""Return label for plural form."""
return PLURAL_TITLE.format(
name=self.get_plural_name(idx),
icon=icon("info.svg"),
# Translators: Label for plurals with example counts
examples=_("For example: {0}").format(", ".join(
self.examples.get(idx, []))),
)
class MathCaptcha(object):
"""Simple match captcha object."""
operators = ('+', '-', '*')
operators_display = {
'+': icon('plus.svg'),
'-': icon('minus.svg'),
'*': icon('close.svg'),
}
interval = (1, 10)
def __init__(self, question=None, timestamp=None):
if question is None:
self.question = self.generate_question()
else:
self.question = question
if timestamp is None:
self.timestamp = time.time()
else:
self.timestamp = timestamp
def generate_question(self):
"""Generate random question."""
generator = SystemRandom()
operation = generator.choice(self.operators)
first = generator.randint(self.interval[0], self.interval[1])
second = generator.randint(self.interval[0], self.interval[1])
# We don't want negative answers
if operation == '-':
first += self.interval[1]
return ' '.join((str(first), operation, str(second)))
@staticmethod
def from_hash(hashed):
"""Create object from hash."""
question, timestamp = unhash_question(hashed)
return MathCaptcha(question, timestamp)
@property
def hashed(self):
"""Return hashed question."""
return hash_question(self.question, self.timestamp)
def validate(self, answer):
"""Validate answer."""
return (self.result == answer
and self.timestamp + TIMEDELTA > time.time())
@property
def result(self):
"""Return result."""
return eval_expr(self.question)
@property
def display(self):
"""Get unicode for display."""
parts = self.question.split()
return ' '.join((
parts[0],
self.operators_display[parts[1]],
parts[2],
))
