check_camping.py

# Download the latest ChromeDriver and put in the same place as this script. Or, in a location on your computer's path.
# http://chromedriver.chromium.org/

# Install Selenium with
# pip install selenium


from selenium import webdriver
from selenium.webdriver.support.ui import Select
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

import sys
import os
import time


# First page is the search form.
# Enter information into form

"""
Configuration: modify these variables as needed.
"""
PARK_NAME = 'Tettegouche State Park'  # Change park name if needed
ACTIVITY = "1"  # "Camping and Lodging", don't need to change
ARRIVAL_DATE = "5/24/2019"  # Change date if needed
STAY_LENGTH = "2"  # Change number of nights if needed

WAIT = 5 # * 60  # Seconds to wait between checks. Repeatedly running the same query too often is a good way to get blocked.
"""
End config
"""

def check_camping():
    while True:
        check_availiability()
        print('Press Control+C to stop the program')
        time.sleep(WAIT)


def check_availiability():

    browser = webdriver.Chrome()
    browser.implicitly_wait(10) # How long to wait for elements that aren't immediately on the page, to account for page loading as the site is navigated.

    browser.get('https://reservemn.usedirect.com/MinnesotaWeb/Default.aspx')

    try:
        park_name = browser.find_element_by_id('txtSearchparkautocomplete')
        activity = Select(browser.find_element_by_id('ddlFacilityCategory'))
        arrival_date = browser.find_element_by_id('mainContent_txtArrivalDate')
        stay_length = Select(browser.find_element_by_id('ddlHomeNights'))
        search_button = browser.find_element_by_link_text('Go')

        #mainContent_divDefaultSearchpart > div.sim_banner_data_box > div > div > div > div:nth-child(5) > div.search_new_go.no_btn_a > a
        park_name.send_keys(PARK_NAME)
        time.sleep(0.5)  # Javascript on the page runs to autocomplete to the text input, so wait for that to complete.
        activity.select_by_value(ACTIVITY)
        arrival_date.send_keys(ARRIVAL_DATE)
        stay_length.select_by_value(STAY_LENGTH)

        search_button.click()

        # Next page is a list of state parks, including nearby parks.  The first
        # park should be the one searched for.  If you care about nearby parks, this
        # would be a good place to check those out too.

        wait = WebDriverWait(browser, 15)
        reserve_button = wait.until(EC.presence_of_element_located((By.XPATH, "//a[text()=' Reserve']")))   # find_elements_by_link_text would get all the reserve buttons, but only care about the first one here, which should be for the park searched for.

        # Parks that are full display the link button with class btn btn-danger and the font awesome icon fa fa-times-circle
        # Parks with availability display the link button with class btn btn-success and the font awesome icon fa fa-check-circle

        # So we don't even need to look at the dates - it's either available for the search or not. Check either the button class or the presence of the either icon.  Class is easier to check.

        reserve_button_class = reserve_button.get_attribute('class')

        if reserve_button_class == 'btn btn-danger':
            print('%s is not available for %s nights starting %s' % (PARK_NAME, STAY_LENGTH, ARRIVAL_DATE))
        if reserve_button_class == 'btn btn-success':
            message = '%s is available for %s nights starting %s' % (PARK_NAME, STAY_LENGTH, ARRIVAL_DATE)
            print(message)
            notify(message)

    except:
        print('Error!', *sys.exc_info())
        browser.quit()
        sys.exit(1)      # Something went wrong, print message and exit program.


    browser.close()


def notify(message):
    # This is up to you. On a Mac/Linux/Windows Bash Shell you can call the say program and get yelled at
    # On a PC, some alternatives https://superuser.com/questions/223913/os-x-say-command-for-windows
    # Or with powershell https://learn-powershell.net/2013/12/04/give-powershell-a-voice-using-the-speechsynthesizer-class/

    os.system('say ' + message)  # Won't work on a PC, check out alternatives above.

    # Other notification approaches: Use Twillio to send a text message, use Twitter API to send a DM...

if __name__ == '__main__':
    check_camping()