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#!/usr/bin/env python3

# importing the libraries
import sys, getopt
import requests
import re
from urllib3.exceptions import InsecureRequestWarning
from bs4 import BeautifulSoup

# Suppress only the single warning from urllib3 needed.
requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning)

#def main (argv):
url = ''
user = ''
passwd = ''
hostname = ''
prd = ''

# Get full command-line arguments
full_cmd_arguments = sys.argv

# Keep all but the first
argument_list = full_cmd_arguments[1:]

short_options = "hu:p:H:P:"
long_options = ["username=","password=","hostname=","publicregistrationdomain"]

def usage():
    print('check-sip-trunk.py -u <username> -p <password> -H <hostname> -P <publicregistrationdomain>')

try:
    arguments, values = getopt.getopt(argument_list, short_options, long_options)
except getopt.GetoptError as err:
    print (str(err))
    usage()
    sys.exit(2)

if not arguments:
  usage()
  sys.exit(2)

for opt, arg in arguments:
    if opt == '-h':
        usage()
        sys.exit()
    elif opt in ("-u", "--username"):
        user = arg
    elif opt in ("-p", "--password"):
        passwd = arg
    elif opt in ("-H", "--hostname"):
        hostname = arg
        url = f"https://{hostname}/services/webapp/monitor/sip_i.php?sip_i=regstatus"
    elif opt in ("-P", "--publicregistrationdomain"):
        prd = arg

# Make a GET request to fetch the raw HTML content
response = requests.get(url, auth=(user, passwd), verify=False)

# Parse the html content
soup = BeautifulSoup(response.text, "lxml")

counter=0
PRD=""
PDDI=""
STATUS=""

rows=[]

for td in soup.find_all("td")[:-1]:
    if counter==0:
        PRD=td.find('b')
        if PRD is not None:
            PRD=PRD.text.split('-',1)[1].strip()
            counter+=1
        else:
            raise IndexError('Tag containing Public Registration Domain not found')
    elif counter==1:
        if not "Public DDI" in td.text:
            raise IndexError('Expected value "Public DDI" but got '+td.text+'')
        counter+=1
    elif counter==2:
        if not "STATUS" in td.text:
            raise IndexError('Expected value "STATUS" but got '+td.text+'')
        counter+=1
    elif counter==3:
        PDDI=td.text
        counter+=1
    elif counter==4:
        STATUS=td.text.strip()

        counter=0
        if STATUS=="REGISTRATION SUCCESSFUL":
            trunkstatus = "0 SIP-TRUNK - OK: Public Registration Domain - "+PRD+", Public DDI - "+PDDI+", Status - "+STATUS
            rows.append(trunkstatus)
        elif STATUS=="REGISTRATION FAILED":
            trunkstatus = "2 SIP-TRUNK - CRITICAL: Public Registration Domain - "+PRD+", Public DDI - "+PDDI+", Status - "+STATUS
            rows.append(trunkstatus)
        else:
            trunkstatus = "3 SIP-TRUNK - UNKNOWN: Public Registration Domain - "+PRD+", Public DDI - "+PDDI+", Status - "+STATUS
            rows.append(trunkstatus)
    else:
        raise IndexError('Critical Error. Index is not within interval 0-4')

for item in rows:
    if re.search(rf"\b{prd}\b",item):
        print(item)
        sys.exit()
    else:
        print("Public Registration Domain \""+prd+"\" does not exist.")
        sys.exit(2)