sms-counter-python/sms_counter/main.py

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# -*- coding: utf8 -*-
"""
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Created on Jul 10, 2016
@author: Dayo
"""
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from math import ceil
class SMSCounter(object):
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GSM_7BIT = 'GSM_7BIT'
GSM_7BIT_EX = 'GSM_7BIT_EX'
UTF16 = 'UTF16'
GSM_7BIT_LEN = GSM_7BIT_EX_LEN = 160
UTF16_LEN = 70
GSM_7BIT_LEN_MULTIPART = GSM_7BIT_EX_LEN_MULTIPART = 153
UTF16_LEN_MULTIPART = 67
@classmethod
def _get_gsm_7bit_map(cls):
gsm_7bit_map = [
10, 12, 13, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45,
46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62,
63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 92, 95, 97, 98, 99,
100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112,
113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 161, 163, 164,
165, 191, 196, 197, 198, 199, 201, 209, 214, 216, 220, 223, 224,
228, 229, 230, 232, 233, 236, 241, 242, 246, 248, 249, 252, 915,
916, 920, 923, 926, 928, 931, 934, 936, 937]
return gsm_7bit_map
@classmethod
def _get_added_gsm_7bit_ex_map(cls):
added_gsm_7bit_ex_map = [12, 91, 92, 93, 94, 123, 124, 125, 126, 8364]
return added_gsm_7bit_ex_map
@classmethod
def _text_to_unicode_pointcode_list(cls, plaintext):
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textlist = []
for stg in plaintext:
textlist.append(ord(stg))
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return textlist
@classmethod
def _detect_encoding(cls, plaintext):
rf = cls._text_to_unicode_pointcode_list(plaintext)
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non_gsm_7bit_chars = set(rf) - set(cls._get_gsm_7bit_map())
if not non_gsm_7bit_chars:
return cls.GSM_7BIT
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non_gsm_7bit_ex_chars = non_gsm_7bit_chars - set(cls._get_added_gsm_7bit_ex_map())
if not non_gsm_7bit_ex_chars:
return cls.GSM_7BIT_EX
return cls.UTF16
@classmethod
def count(cls, plaintext):
textlist = cls._text_to_unicode_pointcode_list(plaintext)
encoding = cls._detect_encoding(plaintext)
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length = len(textlist)
if encoding == cls.GSM_7BIT_EX:
exchars = [c for c in textlist if c in cls._get_added_gsm_7bit_ex_map()]
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lengthexchars = len(exchars)
length += lengthexchars
if encoding == cls.GSM_7BIT:
permessage = cls.GSM_7BIT_LEN
if length > cls.GSM_7BIT_LEN:
permessage = cls.GSM_7BIT_LEN_MULTIPART
elif encoding == cls.GSM_7BIT_EX:
permessage = cls.GSM_7BIT_EX_LEN
if length > cls.GSM_7BIT_EX_LEN:
permessage = cls.GSM_7BIT_EX_LEN_MULTIPART
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else:
permessage = cls.UTF16_LEN
if length > cls.UTF16_LEN:
permessage = cls.UTF16_LEN_MULTIPART
# Convert the dividend to fload so the division will be a float number
# and then convert the ceil result to int
# since python 2.7 return a float
messages = int(ceil(length / float(permessage)))
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remaining = (permessage * messages) - length
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returnset = {
'encoding': encoding,
'length': length,
'per_message': permessage,
'remaining': remaining,
'messages': messages
}
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return returnset
@classmethod
def truncate(cls, plaintext, limitsms):
count = cls.count(plaintext)
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if count.mesages <= limitsms:
return plaintext
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if count.encoding == 'UTF16':
limit = cls.UTF16_LEN
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if limitsms > 2:
limit = cls.UTF16_LEN_MULTIPART
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if count.encoding != 'UTF16':
limit = cls.GSM_7BIT_LEN
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if limitsms > 2:
limit = cls.GSM_7BIT_LEN_MULTIPART
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while True:
text = plaintext[0:limit * limitsms]
count = cls.count(plaintext)
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limit = limit - 1
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if count.messages < limitsms:
break
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return text