BotZ/bot_z/bot_z.py

# -*- coding: utf-8 -*-

"""
Operator is the main object that interacts with the foreign
service. It exposes methods to login, logout and check in and out.
"""

from datetime import datetime, timedelta
import logging
import os
import pkg_resources
import shutil
import sys
import time
import typing as T
from urllib.parse import urlparse

geckoexe = shutil.which("geckodriver")
if geckoexe is None:
    local_path = pkg_resources.resource_filename(__name__, "bin")
    try:
        os.stat(os.path.join(local_path, "geckodriver"))
        os.environ["PATH"] = os.environ["PATH"] + ":" + local_path
    except FileNotFoundError:
        print("Missing geckodriver executable in path", file=sys.stderr)
        raise

from selenium import webdriver as wd  # noqa
from selenium.common.exceptions import (
    WebDriverException,
    NoSuchElementException,
)  # noqa


# TODO: read it from configuration.
RETRIES = 3

log_fmt = logging.Formatter("%(levelname)s: [%(name)s] -> %(message)s")
console = logging.StreamHandler(stream=sys.stdout)
console.setFormatter(log_fmt)
logger = logging.getLogger(__name__)
logger.addHandler(console)
logger.setLevel(os.environ.get("BOTZ_LOGLEVEL", logging.INFO))
logger.debug("Init at debug")


def safely(retries: int = 0) -> T.Callable:
    retr = retries

    def _safely(f: T.Callable) -> T.Callable:
        ret = retr

        def _protection(self, *args, **kwargs):
            r = ret
            done = False
            while r > 0:
                try:
                    f(self, *args, **kwargs)
                    logger.debug("Success executing %s", f.__name__)
                    self.switch_to.default_content()
                    return
                except WebDriverException as e:
                    self.logger.error(
                        "Something went wrong: %s [tentative #%s]", e, ret - r
                    )
                    r -= 1

        return _protection

    return _safely


def _is_present(driver: wd.Firefox, xpath: str) -> bool:
    try:
        driver.find_element_by_xpath(xpath)
        return True
    except NoSuchElementException:
        return False


def is_present(
    driver: wd.Firefox, xpath: str, timeout: T.Optional[timedelta] = None
) -> bool:
    """
    Helper function. If an element is present in the DOM tree,
    returns true. False otherwise.
    """
    if timeout is None:
        return _is_present(driver, xpath)

    _now = datetime.now()
    _elapsed = timedelta(seconds=0)
    while _elapsed < timeout:
        logger.debug("Not yet present: %s", xpath)
        if _is_present(driver, xpath):
            logger.debug("Present: %s", xpath)
            return True
        time.sleep(0.5)
        _elapsed = datetime.now() - _now
    return False


class Operator(wd.Firefox):
    def __init__(
        self,
        base_uri: str,
        name: str = None,
        timeout: int = 20,
        proxy: T.Optional[T.Tuple[str, int]] = None,
        headless: bool = True,
        debug: bool = False,
        *args,
        **kwargs
    ) -> None:
        """
        Adds some configuration to Firefox.
        """
        self.retries = RETRIES
        self.profile = wd.FirefoxProfile()
        # Do not send telemetry
        self.profile.set_preference("datareporting.policy.dataSubmissionEnabled", False)
        self.profile.set_preference("datareporting.healthreport.service.enabled", False)
        self.profile.set_preference("datareporting.healthreport.uploadEnabled", False)

        self.opts = wd.firefox.options.Options()
        self.opts.headless = headless

        self.debug = debug
        self.base_uri = base_uri
        self.uri = urlparse(base_uri)
        self.timeout = timedelta(seconds=timeout)

        if proxy:
            self.profile.set_preference("network.proxy.type", 1)
            self.profile.set_preference("network.proxy.http", proxy[0])
            self.profile.set_preference("network.proxy.http_port", proxy[1])
            self.profile.set_preference("network.proxy.ssl", proxy[0])
            self.profile.set_preference("network.proxy.ssl_port", proxy[1])

        super().__init__(
            firefox_profile=self.profile, options=self.opts, *args, **kwargs
        )
        self.fullscreen_window()

        self.z_name = name if name is not None else __name__
        self.logger = logging.getLogger("{}.{}".format(__name__, self.name))
        if debug:
            self.logger.setLevel(logging.DEBUG)
            self.logger.debug("Debug level")
        self._logged_in = False
        self._checked_in = False
        self.username = None
        # Clean preceding session
        self.delete_all_cookies()

    @safely(RETRIES)
    def login(self, user: str, password: str, force: bool = False) -> None:
        """
        Do the login and proceed.
        """
        if self._logged_in:
            self.logger.warning("Already logged in: %s", user)
            if not force:
                return
            self.logger.info("Forcing login: %s", user)
        # Retrieve login page
        self.get(self.base_uri)
        _correct_url = "cpccchk" in self.current_url
        _now = datetime.now()
        _elapsed = timedelta(seconds=0)
        while not _correct_url:
            self.logger.debug("Not yet on login page: %s", self.current_url)
            time.sleep(0.5)
            _correct_url = "cpccchk" in self.current_url
            _elapsed = datetime.now() - _now
            if _elapsed > self.timeout:
                break
        self.logger.debug("After login get: %s", self.current_url)
        time.sleep(1)
        # Username
        user_form = self.find_element_by_name("m_cUserName")
        # Password
        pass_form = self.find_element_by_name("m_cPassword")
        # Login button
        login_butt = self.find_element_by_xpath('//input[contains(@id, "_Accedi")]')
        # Compile and submit
        user_form.send_keys(user)
        pass_form.send_keys(password)
        do_it = True
        if self.debug and not force:
            _do_it = input("Really do the login? [y/n] ").lower()
            do_it = True if _do_it == "y" else False
        if do_it:
            login_butt.submit()
            time.sleep(5)
            self.logger.debug("Login result: %s", self.title)
            if "Routine window" in self.title:
                self.logger.debug("Reloading...")
                self.refresh()
                self.switch_to.alert.accept()
            if is_present(self, '//a[contains(@class, "imgMenu_ctrl")]', self.timeout):
                self._logged_in = True
                self.logger.info("Login success for user: %s", user)
            else:
                self.logger.error("Login failed: %s", user)
        self.username = user

    @safely(RETRIES)
    def logout(self, force: bool = False) -> None:
        """
        Do the logout.
        """
        if not self._logged_in:
            self.logger.warning("Not yet logged in")
            if not force:
                return
            self.logger.info("Forcing logout: %s", self.username)
        # Find the Profile menu and open it
        profile_butt = self.find_element_by_xpath(
            '//span[contains(@id, "imgNoPhotoLabel")]'
        )
        profile_butt.click()
        time.sleep(1)
        # Find the logout button
        logout_butt = self.find_element_by_xpath('//input[@value="Logout user"]')
        logout_butt.click()
        if "jsp/usut_wapplogout_portlet.jsp" in self.current_url:
            self.logger.info("User successfully logged out: %s", self.username)
            self.username = None
        else:
            self.logger.warning("Logout failed: %s", self.username)

    @property
    def logged_in(self) -> bool:
        """
        Check if already logged in. Checks if page is '/jsp/home.jsp'
        and if login cookie is set (and not expired).
        """
        _base_domain = ".".join(self.uri.netloc.split(".")[-2:])
        cookies = [c["name"] for c in self.get_cookies() if _base_domain in c["domain"]]
        _right_url = "/jsp/home.jsp" in self.current_url
        _cookies = "dtLatC" in cookies
        return _right_url and _cookies

    @property
    def checked_in(self) -> bool:
        """
        Check if the user is checked in already.
        """
        return self._checked_in

    @safely(RETRIES)
    def check_in(self, force: bool = False) -> None:
        """
        Click the check in button.
        """
        if not force and not self.logged_in:
            self.logger.warning("Not logged in!")
            return
        if self._checked_in:
            self.logger.warn("Already checked in!")
            if not force:
                return
        iframe = self.find_element_by_xpath(
            '//iframe[contains(@id, "gsmd_container.jsp")]'
        )
        self.switch_to.frame(iframe)
        enter_butt = self.find_element_by_xpath('//input[@value="Entrata"]')
        enter_butt.click()
        # Click the check in button and change
        # self._checked_in state in case of success
        self._checked_in = True

    @safely(RETRIES)
    def check_out(self, force: bool = False) -> None:
        """
        Click the check out button.
        """
        if not force and not self.logged_in:
            self.logger.warning("Not logged in!")
            return
        if not self._checked_in:
            self.logger.warn("Not yet checked in!")
            if not force:
                return
        iframe = self.find_element_by_xpath(
            '//iframe[contains(@id, "gsmd_container.jsp")]'
        )
        self.switch_to.frame(iframe)
        exit_butt = self.find_element_by_xpath('//input[@value="Uscita"]')
        exit_butt.click()
        # Click the check in button and change
        # self._checked_in state in case of success
        self._checked_in = False

    def __del__(self) -> None:
        self.quit()