299 lines
9.6 KiB
Python
299 lines
9.6 KiB
Python
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import os
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import logging
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import datetime
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import math
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import re
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from six.moves.urllib.request import urlopen
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from six.moves.urllib.parse import urlencode
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import aniso8601
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from flask import Flask, json, render_template
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from flask_ask import Ask, request, session, question, statement
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ENDPOINT = "http://tidesandcurrents.noaa.gov/api/datagetter"
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SESSION_CITY = "city"
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SESSION_DATE = "date"
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# NOAA station codes
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STATION_CODE_SEATTLE = "9447130"
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STATION_CODE_SAN_FRANCISCO = "9414290"
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STATION_CODE_MONTEREY = "9413450"
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STATION_CODE_LOS_ANGELES = "9410660"
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STATION_CODE_SAN_DIEGO = "9410170"
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STATION_CODE_BOSTON = "8443970"
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STATION_CODE_NEW_YORK = "8518750"
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STATION_CODE_VIRGINIA_BEACH = "8638863"
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STATION_CODE_WILMINGTON = "8658163"
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STATION_CODE_CHARLESTON = "8665530"
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STATION_CODE_BEAUFORT = "8656483"
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STATION_CODE_MYRTLE_BEACH = "8661070"
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STATION_CODE_MIAMI = "8723214"
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STATION_CODE_TAMPA = "8726667"
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STATION_CODE_NEW_ORLEANS = "8761927"
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STATION_CODE_GALVESTON = "8771341"
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STATIONS = {}
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STATIONS["seattle"] = STATION_CODE_SEATTLE
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STATIONS["san francisco"] = STATION_CODE_SAN_FRANCISCO
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STATIONS["monterey"] = STATION_CODE_MONTEREY
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STATIONS["los angeles"] = STATION_CODE_LOS_ANGELES
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STATIONS["san diego"] = STATION_CODE_SAN_DIEGO
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STATIONS["boston"] = STATION_CODE_BOSTON
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STATIONS["new york"] = STATION_CODE_NEW_YORK
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STATIONS["virginia beach"] = STATION_CODE_VIRGINIA_BEACH
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STATIONS["wilmington"] = STATION_CODE_WILMINGTON
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STATIONS["charleston"] = STATION_CODE_CHARLESTON
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STATIONS["beaufort"] = STATION_CODE_BEAUFORT
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STATIONS["myrtle beach"] = STATION_CODE_MYRTLE_BEACH
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STATIONS["miami"] = STATION_CODE_MIAMI
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STATIONS["tampa"] = STATION_CODE_TAMPA
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STATIONS["new orleans"] = STATION_CODE_NEW_ORLEANS
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STATIONS["galveston"] = STATION_CODE_GALVESTON
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app = Flask(__name__)
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ask = Ask(app, "/")
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logging.getLogger('flask_ask').setLevel(logging.DEBUG)
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class TideInfo(object):
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def __init__(self):
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self.first_high_tide_time = None
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self.first_high_tide_height = None
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self.low_tide_time = None
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self.low_tide_height = None
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self.second_high_tide_time = None
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self.second_high_tide_height = None
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@ask.launch
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def launch():
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welcome_text = render_template('welcome')
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help_text = render_template('help')
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return question(welcome_text).reprompt(help_text)
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@ask.intent('OneshotTideIntent',
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mapping={'city': 'City', 'date': 'Date'},
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convert={'date': 'date'},
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default={'city': 'seattle', 'date': datetime.date.today })
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def one_shot_tide(city, date):
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if city.lower() not in STATIONS:
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return supported_cities()
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return _make_tide_request(city, date)
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@ask.intent('DialogTideIntent',
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mapping={'city': 'City', 'date': 'Date'},
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convert={'date': 'date'})
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def dialog_tide(city, date):
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if city is not None:
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if city.lower() not in STATIONS:
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return supported_cities()
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if SESSION_DATE not in session.attributes:
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session.attributes[SESSION_CITY] = city
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return _dialog_date(city)
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date = aniso8601.parse_date(session.attributes[SESSION_DATE])
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return _make_tide_request(city, date)
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elif date is not None:
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if SESSION_CITY not in session.attributes:
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session.attributes[SESSION_DATE] = date.isoformat()
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return _dialog_city(date)
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city = session.attributes[SESSION_CITY]
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return _make_tide_request(city, date)
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else:
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return _dialog_no_slot()
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@ask.intent('SupportedCitiesIntent')
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def supported_cities():
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cities = ", ".join(sorted(STATIONS.keys()))
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list_cities_text = render_template('list_cities', cities=cities)
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list_cities_reprompt_text = render_template('list_cities_reprompt')
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return question(list_cities_text).reprompt(list_cities_reprompt_text)
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@ask.intent('AMAZON.HelpIntent')
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def help():
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help_text = render_template('help')
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list_cities_reprompt_text = render_template('list_cities_reprompt')
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return question(help_text).reprompt(list_cities_reprompt_text)
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@ask.intent('AMAZON.StopIntent')
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def stop():
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bye_text = render_template('bye')
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return statement(bye_text)
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@ask.intent('AMAZON.CancelIntent')
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def cancel():
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bye_text = render_template('bye')
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return statement(bye_text)
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@ask.session_ended
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def session_ended():
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return "{}", 200
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@app.template_filter()
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def humanize_date(dt):
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# http://stackoverflow.com/a/20007730/1163855
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ordinal = lambda n: "%d%s" % (n,"tsnrhtdd"[(n/10%10!=1)*(n%10<4)*n%10::4])
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month_and_day_of_week = dt.strftime('%A %B')
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day_of_month = ordinal(dt.day)
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year = dt.year if dt.year != datetime.datetime.now().year else ""
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formatted_date = "{} {} {}".format(month_and_day_of_week, day_of_month, year)
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formatted_date = re.sub('\s+', ' ', formatted_date)
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return formatted_date
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@app.template_filter()
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def humanize_time(dt):
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morning_threshold = 12
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afternoon_threshold = 17
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evening_threshold = 20
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hour_24 = dt.hour
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if hour_24 < morning_threshold:
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period_of_day = "in the morning"
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elif hour_24 < afternoon_threshold:
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period_of_day = "in the afternoon"
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elif hour_24 < evening_threshold:
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period_of_day = "in the evening"
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else:
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period_of_day = " at night"
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the_time = dt.strftime('%I:%M')
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formatted_time = "{} {}".format(the_time, period_of_day)
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return formatted_time
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@app.template_filter()
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def humanize_height(height):
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round_down_threshold = 0.25
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round_to_half_threshold = 0.75
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is_negative = False
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if height < 0:
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height = abs(height)
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is_negative = True
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remainder = height % 1
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if remainder < round_down_threshold:
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remainder_text = ""
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feet = int(math.floor(height))
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elif remainder < round_to_half_threshold:
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remainder_text = "and a half"
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feet = int(math.floor(height))
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else:
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remainder_text = ""
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feet = int(math.floor(height))
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if is_negative:
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feet *= -1
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formatted_height = "{} {} feet".format(feet, remainder_text)
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formatted_height = re.sub('\s+', ' ', formatted_height)
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return formatted_height
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def _dialog_no_slot():
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if SESSION_CITY in session.attributes:
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date_dialog2_text = render_template('date_dialog2')
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return question(date_dialog2_text).reprompt(date_dialog2_text)
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else:
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return supported_cities()
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def _dialog_date(city):
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date_dialog_text = render_template('date_dialog', city=city)
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date_dialog_reprompt_text = render_template('date_dialog_reprompt')
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return question(date_dialog_text).reprompt(date_dialog_reprompt_text)
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def _dialog_city(date):
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session.attributes[SESSION_DATE] = date
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session.attributes_encoder = _json_date_handler
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city_dialog_text = render_template('city_dialog', date=date)
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city_dialog_reprompt_text = render_template('city_dialog_reprompt')
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return question(city_dialog_text).reprompt(city_dialog_reprompt_text)
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def _json_date_handler(obj):
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if isinstance(obj, datetime.date):
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return obj.isoformat()
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def _make_tide_request(city, date):
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station = STATIONS.get(city.lower())
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noaa_api_params = {
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'station': station,
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'product': 'predictions',
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'datum': 'MLLW',
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'units': 'english',
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'time_zone': 'lst_ldt',
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'format': 'json'
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}
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if date == datetime.date.today():
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noaa_api_params['date'] = 'today'
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else:
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noaa_api_params['begin_date'] = date.strftime('%Y%m%d')
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noaa_api_params['range'] = 24
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url = ENDPOINT + "?" + urlencode(noaa_api_params)
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resp_body = urlopen(url).read()
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if len(resp_body) == 0:
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statement_text = render_template('noaa_problem')
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else:
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noaa_response_obj = json.loads(resp_body)
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predictions = noaa_response_obj['predictions']
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tideinfo = _find_tide_info(predictions)
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statement_text = render_template('tide_info', date=date, city=city, tideinfo=tideinfo)
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return statement(statement_text).simple_card("Tide Pooler", statement_text)
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def _find_tide_info(predictions):
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"""
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Algorithm to find the 2 high tides for the day, the first of which is smaller and occurs
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mid-day, the second of which is larger and typically in the evening.
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"""
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last_prediction = None
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first_high_tide = None
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second_high_tide = None
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low_tide = None
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first_tide_done = False
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for prediction in predictions:
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if last_prediction is None:
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last_prediction = prediction
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continue
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if last_prediction['v'] < prediction['v']:
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if not first_tide_done:
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first_high_tide = prediction
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else:
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second_high_tide = prediction
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else: # we're decreasing
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if not first_tide_done and first_high_tide is not None:
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first_tide_done = True
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elif second_high_tide is not None:
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break # we're decreasing after having found the 2nd tide. We're done.
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if first_tide_done:
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low_tide = prediction
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last_prediction = prediction
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fmt = '%Y-%m-%d %H:%M'
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parse = datetime.datetime.strptime
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tideinfo = TideInfo()
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tideinfo.first_high_tide_time = parse(first_high_tide['t'], fmt)
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tideinfo.first_high_tide_height = float(first_high_tide['v'])
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tideinfo.second_high_tide_time = parse(second_high_tide['t'], fmt)
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tideinfo.second_high_tide_height = float(second_high_tide['v'])
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tideinfo.low_tide_time = parse(low_tide['t'], fmt)
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tideinfo.low_tide_height = float(low_tide['v'])
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return tideinfo
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if __name__ == '__main__':
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if 'ASK_VERIFY_REQUESTS' in os.environ:
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verify = str(os.environ.get('ASK_VERIFY_REQUESTS', '')).lower()
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if verify == 'false':
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app.config['ASK_VERIFY_REQUESTS'] = False
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app.run(debug=True)
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