whatsapp_api.py

# -*- coding: utf-8 -*-
"""
Created on Thu Jun 25 08:22:38 2020

@author: Roberto de Souza
"""
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.chrome.options import Options
from time import sleep

# Parameters
WP_LINK = 'https://web.whatsapp.com'

## XPATHS
CONTACTS = '//*[@id="main"]/header/div[2]/div[2]/span'
SEND = '//*[@id="main"]/footer/div[1]/div[3]'
MESSAGE_BOX = '//*[@id="main"]/footer/div[1]/div[2]/div/div[2]'
NEW_CHAT = '//*[@id="side"]/header/div[2]/div/span/div[2]/div'
FIRST_CONTACT = '//*[@id="app"]/div/div/div[2]/div[1]/span/div/span/div/div[2]/div/div/div/div[2]/div'
SEARCH_CONTACT ='//*[@id="app"]/div/div/div[2]/div[1]/span/div/span/div/div[1]/div/label/div/div[2]'


class WhatsApp:
    def __init__(self):
        self.driver = self._setup_driver()
        self.driver.get(WP_LINK)
        print("Please scan the QR Code")

    @staticmethod
    def _setup_driver():
        print('Loading...')
        chrome_options = Options()
        chrome_options.add_argument("disable-infobars")
        driver = webdriver.Chrome(chrome_options=chrome_options)
        return driver

    def _get_element(self, xpath, attempts=5, _count=0):
        '''Safe get_element method with multiple attempts'''
        try:
            element = self.driver.find_element_by_xpath(xpath)
            #print('Found element!')
            return element
        except Exception as e:
            if _count<attempts:
                sleep(1)
                #print(f'Attempt {_count}')
                self._get_element(xpath, attempts=attempts, _count=_count+1)
            else:
                print("Element not found")

    def _click(self, xpath):
        el = self._get_element(xpath)
        el.click()

    def _send_keys(self, xpath, message):
        el = self._get_element(xpath)
        el.send_keys(message)

    def write_message(self, message):
        '''Write message in the text box but not send it'''
        self._click(MESSAGE_BOX)
        self._send_keys(MESSAGE_BOX, message)

    def _paste(self):
        el = self._get_element(MESSAGE_BOX)
        el.send_keys(Keys.SHIFT, Keys.INSERT)

    def send_message(self, message):
        '''Write and send message'''
        self.write_message(message)
        self._click(SEND)

    def get_group_numbers(self):
        '''Get phone numbers from a whatsapp group'''
        try:
            el = self.driver.find_element_by_xpath(CONTACTS)
            return el.text.split(',')
        except Exception as e:
            print("Group header not found")

    def search_contact(self, keyword):
        '''Write and send message'''
        self._click(NEW_CHAT)
        self._send_keys(SEARCH_CONTACT, keyword)
        sleep(1)
        try:
            self._click(FIRST_CONTACT)
        except Exception as e:
            print("Contact not found")
            
    def get_all_messages(self):
        all_messages_element = self.driver.find_elements_by_class_name('_12pGw')
        all_messages_text = [e.text for e in all_messages_element]
        return all_messages_text
        
    def get_last_message(self):
        all_messages = self.get_all_messages()
        return all_messages[-1]