Implement calendar display application
Built a full-featured smart display app with Flask backend and responsive frontend. Features: - Real-time clock display - Weather integration (OpenWeatherMap API) for Hamilton, NZ - Google Calendar integration (placeholder, needs credentials) - Rotating background images from local directory - Dad jokes display (icanhazdadjoke API) Technical stack: - Backend: Python Flask with API endpoints - Frontend: HTML/CSS/JavaScript with auto-updating data - Caching system to avoid API rate limits - Responsive design for various screen sizes Deployment ready for Raspberry Pi with systemd service and Chromium kiosk mode setup instructions. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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app.py
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187
app.py
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from flask import Flask, render_template, jsonify
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import requests
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import os
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import random
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from datetime import datetime, timedelta
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from config import Config
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app = Flask(__name__)
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app.config.from_object(Config)
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# Cache for API responses to avoid rate limiting
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weather_cache = {'data': None, 'timestamp': None}
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calendar_cache = {'data': None, 'timestamp': None}
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joke_cache = {'data': None, 'timestamp': None}
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@app.route('/')
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def index():
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"""Render the main display page."""
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return render_template('index.html')
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@app.route('/api/weather')
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def get_weather():
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"""Fetch weather data from OpenWeatherMap API."""
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global weather_cache
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# Check cache
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now = datetime.now()
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if (weather_cache['data'] and weather_cache['timestamp'] and
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(now - weather_cache['timestamp']).total_seconds() < app.config['WEATHER_UPDATE_INTERVAL']):
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return jsonify(weather_cache['data'])
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try:
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# Fetch current weather
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current_url = f"https://api.openweathermap.org/data/2.5/weather"
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params = {
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'lat': app.config['WEATHER_LAT'],
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'lon': app.config['WEATHER_LON'],
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'appid': app.config['OPENWEATHER_API_KEY'],
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'units': app.config['WEATHER_UNITS']
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}
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current_response = requests.get(current_url, params=params, timeout=10)
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current_response.raise_for_status()
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current_data = current_response.json()
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# Fetch 5-day forecast
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forecast_url = f"https://api.openweathermap.org/data/2.5/forecast"
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forecast_response = requests.get(forecast_url, params=params, timeout=10)
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forecast_response.raise_for_status()
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forecast_data = forecast_response.json()
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# Process forecast to get daily summaries
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daily_forecast = []
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seen_dates = set()
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for item in forecast_data['list'][:40]: # Next 5 days (8 forecasts per day)
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date = datetime.fromtimestamp(item['dt']).date()
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if date not in seen_dates and len(daily_forecast) < 5:
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seen_dates.add(date)
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daily_forecast.append({
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'date': date.strftime('%a'),
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'temp_max': round(item['main']['temp_max']),
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'temp_min': round(item['main']['temp_min']),
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'description': item['weather'][0]['description'],
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'icon': item['weather'][0]['icon']
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})
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weather_data = {
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'current': {
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'temp': round(current_data['main']['temp']),
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'feels_like': round(current_data['main']['feels_like']),
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'description': current_data['weather'][0]['description'],
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'icon': current_data['weather'][0]['icon'],
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'humidity': current_data['main']['humidity'],
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'wind_speed': round(current_data['wind']['speed'] * 3.6, 1) # Convert m/s to km/h
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},
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'forecast': daily_forecast
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}
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# Update cache
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weather_cache = {'data': weather_data, 'timestamp': now}
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return jsonify(weather_data)
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except Exception as e:
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app.logger.error(f"Error fetching weather: {str(e)}")
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# Return cached data if available, otherwise return error
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if weather_cache['data']:
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return jsonify(weather_cache['data'])
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return jsonify({'error': 'Unable to fetch weather data'}), 500
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@app.route('/api/calendar')
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def get_calendar():
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"""Fetch Google Calendar events."""
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global calendar_cache
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# Check cache
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now = datetime.now()
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if (calendar_cache['data'] and calendar_cache['timestamp'] and
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(now - calendar_cache['timestamp']).total_seconds() < app.config['CALENDAR_UPDATE_INTERVAL']):
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return jsonify(calendar_cache['data'])
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# TODO: Implement Google Calendar API integration
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# For now, return placeholder data
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try:
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# This is placeholder data - will be replaced with actual Google Calendar API
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events = [
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{
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'title': 'Setup Google Calendar API',
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'start': (datetime.now() + timedelta(hours=2)).isoformat(),
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'end': (datetime.now() + timedelta(hours=3)).isoformat(),
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'location': ''
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}
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]
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calendar_cache = {'data': events, 'timestamp': now}
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return jsonify(events)
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except Exception as e:
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app.logger.error(f"Error fetching calendar: {str(e)}")
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if calendar_cache['data']:
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return jsonify(calendar_cache['data'])
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return jsonify({'error': 'Unable to fetch calendar data'}), 500
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@app.route('/api/background')
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def get_background():
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"""Get a random background image."""
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try:
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backgrounds_dir = app.config['BACKGROUNDS_DIR']
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# Get list of image files
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if os.path.exists(backgrounds_dir):
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image_files = [f for f in os.listdir(backgrounds_dir)
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if f.lower().endswith(('.png', '.jpg', '.jpeg', '.gif', '.webp'))]
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if image_files:
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random_image = random.choice(image_files)
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return jsonify({'image': f'/static/backgrounds/{random_image}'})
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# Return a default color if no images
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return jsonify({'image': None, 'color': '#1a1a2e'})
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except Exception as e:
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app.logger.error(f"Error getting background: {str(e)}")
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return jsonify({'image': None, 'color': '#1a1a2e'})
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@app.route('/api/joke')
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def get_joke():
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"""Fetch a dad joke."""
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global joke_cache
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# Check cache
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now = datetime.now()
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if (joke_cache['data'] and joke_cache['timestamp'] and
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(now - joke_cache['timestamp']).total_seconds() < app.config['JOKE_UPDATE_INTERVAL']):
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return jsonify(joke_cache['data'])
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try:
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response = requests.get(
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'https://icanhazdadjoke.com/',
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headers={'Accept': 'application/json'},
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timeout=10
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)
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response.raise_for_status()
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joke_data = response.json()
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joke_cache = {'data': {'joke': joke_data['joke']}, 'timestamp': now}
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return jsonify(joke_cache['data'])
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except Exception as e:
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app.logger.error(f"Error fetching joke: {str(e)}")
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if joke_cache['data']:
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return jsonify(joke_cache['data'])
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return jsonify({'joke': 'Why did the developer go broke? Because he used up all his cache!'})
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if __name__ == '__main__':
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# Create backgrounds directory if it doesn't exist
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os.makedirs(app.config['BACKGROUNDS_DIR'], exist_ok=True)
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os.makedirs(app.config['CREDENTIALS_DIR'], exist_ok=True)
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# Run the app
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app.run(host='0.0.0.0', port=5000, debug=True)
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