Periodically checking reservation slots for Yosemite National Park Ticketed Entry.

yosemite_reservation_check.py

# pm2 start yosemite-reservation-check.py --name yosemite --interpreter python

import http.client
import json, time, threading

to_query_dates = ["2022-06-07", "2022-06-08", "2022-06-09"] # Follow the format: YYYY-MM-DD
query_period = 300 # seconds

def query():
    conn = http.client.HTTPSConnection("www.recreation.gov")
    # Change year and month accordingly
    conn.request("GET", "/api/timedentry/availability/facility/10086745/monthlyAvailabilitySummaryView?year=2022&month=06&inventoryBucket=FIT&tourID=10086746", "")
    res = conn.getresponse()
    data = res.read()
    data_json = json.loads(data.decode("utf-8"))
    return data_json

def query_date(result, date):
    try:
        return result["facility_availability_summary_view_by_local_date"][date]["availability_level"]
    except BaseException as e:
        print(e)
        return str(e)

def alert(payload):
    conn = http.client.HTTPSConnection("maker.ifttt.com")
    headers = { 'Content-Type': "application/json" }
    # Change XXXXXXXXXXXXXXXXXXXXXX to your own API key on https://ifttt.com/maker_webhooks
    conn.request("POST", "/trigger/yosemite_reservation/json/with/key/XXXXXXXXXXXXXXXXXXXXXX", payload, headers)
    res = conn.getresponse()
    data = res.read()
    print(data.decode("utf-8"))
    
def event(): 
    print("+--------------------------+")
    print("|", time.ctime(), "|")
    print("+--------------------------+")

    query_result = query()
    alert_payload = {"availability": []}
    
    for date in to_query_dates:
        print(date, query_date(query_result, date))
        alert_payload["availability"].append({date: query_date(query_result, date)})
    
    print(alert_payload)
        
    for date in to_query_dates:
        if query_date(query_result, date) != "NONE":
            alert(json.dumps(alert_payload))
    
    threading.Timer(query_period, event).start()
    
event()