scratchings/main.py

import psycopg2.extras
import model
# from pprint import pprint
import time
import database
import sys
import view


if __name__ == '__main__':
    row = -1
    if len(sys.argv) > 1:
        try:
            row = int(sys.argv[1])
        except ValueError:
            sys.exit(1)

    start = time.time()

    db = database.db

    race_days_global = model.scrape_main_page(row)
    interim = time.time()
    # print('interim 1 {}'.format(interim - start))
    # pprint(race_days_global)
    race_days = []
    raw_data_dict = {}
    for race_day in race_days_global:
        raw_data = model.get_raw_scratchings(race_day)
        race_day_details = model.process_raw_data(raw_data, race_day)
        race_days.append(race_day_details)
        raw_data_dict[race_day.name] = raw_data
    interim = time.time()
    # print('interim 2 {}'.format(interim - start))
    # pprint(race_days)
    cursor = db.cursor(cursor_factory=psycopg2.extras.NamedTupleCursor)
    for race_day in race_days:
        if not raw_data_dict or not race_day:
            # raw_data_dict may be empty when there is no data available (yet)
            continue
        raw_data = raw_data_dict[race_day.name]
        scratchings = model.get_scratching_details(raw_data, race_day)
        if not scratchings:
            # model.get_scratchings_details may return empty
            continue
        # retrieve previous stored scratching for this venue / day
        query = "SELECT * FROM horses WHERE venue = %s AND race_date = %s;"

        cursor.execute(query, (race_day.name, race_day.date))
        db_data = cursor.fetchall()

        # compare retrieved scratchings with new data
        for scratching in scratchings:
            found_in_database = False
            for row in db_data:
                # print(row)
                if (
                        scratching.date == row.race_date and
                        scratching.venue == row.venue and
                        scratching.race == row.race and
                        scratching.horse == row.horse
                ):
                    message = 'Horse found: date = {}, venue = {}, race = {}, horse = {}'.format(scratching.date,
                                                                                                 scratching.venue,
                                                                                                 scratching.race,
                                                                                                 scratching.horse)
                    # print(message)
                    found_in_database = True
            if not found_in_database:
                # report new scratching
                message = 'New scratching: date = {} venue = {}-{} race = {} horse = {}'.format(scratching.date,
                                                                                                scratching.state,
                                                                                                scratching.venue,
                                                                                                scratching.race,
                                                                                                scratching.horse)
                print(message)
                view.broadcast(message)
                # store new scratching
                query = "INSERT INTO horses(venue, race_date, race, horse) VALUES(%s, %s, %s, %s)"
                cursor.execute(query, (scratching.venue, scratching.date,
                                       scratching.race, scratching.horse))
            db.commit()
    cursor.close()
    db.close()

    interim = time.time()
    # print('interim 3 {}'.format(interim - start))