From 75df63028a734f6ef4ca00365f3d3a7681127f08 Mon Sep 17 00:00:00 2001
From: Dayo Ayeni <dedayoa@gmail.com>
Date: Sun, 10 Jul 2016 21:15:20 +0100
Subject: [PATCH] Create sms-counter

First Commit
---
 sms-counter | 161 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 sms-counter

diff --git a/sms-counter b/sms-counter
new file mode 100644
index 0000000..9514d50
--- /dev/null
+++ b/sms-counter
@@ -0,0 +1,161 @@
+# -*- coding: utf8 -*- 
+'''
+Created on Jul 10, 2016
+
+@author: Dayo
+'''
+from math import ceil
+
+
+class SMSCounter():
+    
+    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
+
+    
+    def get_gsm_7bit_map(self):
+        
+        return(
+               [64, 163, 36, 165, 232, 233, 249, 
+                236, 242, 199, 92, 110, 216, 248, 
+                92, 114, 197, 229, 916, 95, 934, 
+                915, 923, 937, 928, 936, 931, 920, 
+                926, 198, 230, 223, 201, 32, 33, 92, 
+                34, 35, 164, 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, 161, 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, 196, 214, 209, 220, 167, 
+                191, 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, 228, 246, 
+                241, 252, 224]
+               )
+        
+    def get_added_gsm_7bit_ex_map(self):
+        
+        return [91, 93, 124, 8364, 123, 92, 125, 126, 94]
+    
+    def get_gsm_7bit_ex_map(self):
+        
+        return(self.get_added_gsm_7bit_ex_map()+self.get_gsm_7bit_map())
+    
+    
+    def text_to_unicode_pointcode_list(self, plaintext):
+        
+        textlist = []
+        for stg in plaintext:
+            textlist.append(ord(stg))            
+        return textlist
+    
+    def unicode_pointcode_list_to_text(self, strlist):
+        
+        text = ''
+        for stc in strlist:
+            text.join(chr(stc))            
+        return text
+    
+    
+    def detect_encoding(self, plaintext):
+        
+        rf = self.text_to_unicode_pointcode_list(plaintext)
+
+        utf16chars = set(rf).difference(set(self.get_gsm_7bit_map()))
+
+        if len(utf16chars):
+            return self.UTF16
+        
+        exchars = set(rf).intersection(set(self.get_added_gsm_7bit_ex_map()))
+
+        if len(exchars):
+            return self.GSM_7BIT_EX
+        
+        return self.GSM_7BIT
+        
+        
+        
+    
+    def count(self, plaintext):
+        
+        textlist = self.text_to_unicode_pointcode_list(plaintext)
+        
+        exchars = []
+        encoding = self.detect_encoding(plaintext)
+        length = len(textlist)
+        
+        if encoding == self.GSM_7BIT_EX:
+            lengthexchars = len(exchars)
+            length+=lengthexchars
+            
+        if encoding == self.GSM_7BIT:
+            permessage = self.GSM_7BIT_LEN
+            if length > self.GSM_7BIT_LEN:
+                permessage = self.GSM_7BIT_LEN_MULTIPART
+                
+        
+        elif encoding == self.GSM_7BIT_EX:
+            permessage = self.GSM_7BIT_EX_LEN
+            if length > self.GSM_7BIT_EX_LEN:
+                permessage = self.GSM_7BIT_EX_LEN_MULTIPART
+                
+        
+        else:
+            permessage = self.UTF16_LEN
+            if length > self.UTF16_LEN:
+                permessage = self.UTF16_LEN_MULTIPART
+                
+        
+        messages = ceil(length/permessage)
+        remaining = (permessage * messages) - length
+        
+        returnset = {
+            'encoding' : encoding,
+            'length' : length,
+            'per_message' : permessage,
+            'remaining' : remaining,
+            'messages' : messages
+                     }
+        
+        return returnset
+    
+    
+    def truncate(self, plaintext, limitsms):
+        
+        count = self.count(plaintext)
+        
+        if count.mesages <= limitsms:
+            return plaintext
+        
+        
+        if count.encoding == 'UTF16':
+            limit = self.UTF16_LEN
+            
+            if limitsms > 2:
+                limit = self.UTF16_LEN_MULTIPART
+                
+        if count.encoding != 'UTF16':
+            limit = self.GSM_7BIT_LEN
+            
+            if limitsms > 2:
+                limit = self.GSM_7BIT_LEN_MULTIPART
+    
+            
+        while True:
+            text = plaintext[0:limit*limitsms]
+            count = self.count(plaintext)
+            
+            limit = limit - 1
+            
+            if count.messages < limitsms:
+                break
+            
+        return text
+