import datetime

import json

from twilio.base import values

def iso8601_date(d):

"""

Return a string representation of a date that the Twilio API understands

Format is YYYY-MM-DD. Returns None if d is not a string, datetime, or date

"""

if d == values.unset:

return d

elif isinstance(d, datetime.datetime):

return str(d.date())

elif isinstance(d, datetime.date):

return str(d)

elif isinstance(d, str):

return d

def iso8601_datetime(d):

"""

Return a string representation of a date that the Twilio API understands

Format is YYYY-MM-DD. Returns None if d is not a string, datetime, or date

"""

if d == values.unset:

return d

elif isinstance(d, datetime.datetime) or isinstance(d, datetime.date):

return d.strftime("%Y-%m-%dT%H:%M:%SZ")

elif isinstance(d, str):

return d

def prefixed_collapsible_map(m, prefix):

"""

Return a dict of params corresponding to those in m with the added prefix

"""

if m == values.unset:

return {}

def flatten_dict(d, result=None, prv_keys=None):

if result is None:

result = {}

if prv_keys is None:

prv_keys = []

for k, v in d.items():

if isinstance(v, dict):

flatten_dict(v, result, prv_keys + [k])

else:

result[".".join(prv_keys + [k])] = v

return result

if isinstance(m, dict):

flattened = flatten_dict(m)

return {"{}.{}".format(prefix, k): v for k, v in flattened.items()}

return {}

def boolean_to_string(bool_or_str):

if bool_or_str == values.unset:

return bool_or_str

if bool_or_str is None:

return bool_or_str

if isinstance(bool_or_str, str):

return bool_or_str.lower()

return "true" if bool_or_str else "false"

def object(obj):

"""

Return a jsonified string represenation of obj if obj is jsonifiable else

return obj untouched

"""

if isinstance(obj, dict) or isinstance(obj, list):

return json.dumps(obj)

return obj

def map(lst, serialize_func):

"""

Applies serialize_func to every element in lst

"""

if not isinstance(lst, list):

return lst

return [serialize_func(e) for e in lst]