mirror of
https://github.com/PranshulGG/WeatherMaster.git
synced 2026-10-22 11:02:53 -05:00
220 lines
8.9 KiB
Dart
220 lines
8.9 KiB
Dart
import 'dart:convert';
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import 'dart:developer';
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import 'package:http/http.dart' as http;
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import 'package:hive/hive.dart';
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import 'package:lat_lng_to_timezone/lat_lng_to_timezone.dart' as tzmap;
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import '../utils/preferences_helper.dart';
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import 'package:flutter/material.dart';
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import '../screens/meteo_models.dart';
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class WeatherService {
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static const String _boxName = 'weatherMasterCache';
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Future<Box> _openBox() async {
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if (!Hive.isBoxOpen(_boxName)) {
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return await Hive.openBox(_boxName);
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}
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return Hive.box(_boxName);
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}
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Future<Map<String, dynamic>?> fetchWeather(double lat, double lon, {String? locationName, BuildContext? context, bool isOnlyView = false}) async {
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final timezone = tzmap.latLngToTimezoneString(lat, lon);
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final key = locationName ?? 'loc_${lat}_${lon}';
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final box = await _openBox();
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final uri = Uri.parse('https://api.open-meteo.com/v1/forecast').replace(queryParameters: {
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'latitude': lat.toString(),
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'longitude': lon.toString(),
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'current': 'temperature_2m,is_day,apparent_temperature,pressure_msl,relative_humidity_2m,precipitation,weather_code,cloud_cover,wind_speed_10m,wind_direction_10m,wind_gusts_10m',
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'hourly': 'wind_speed_10m,wind_direction_10m,relative_humidity_2m,pressure_msl,cloud_cover,temperature_2m,dew_point_2m,apparent_temperature,precipitation_probability,precipitation,weather_code,visibility,uv_index',
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'daily': 'weather_code,temperature_2m_max,temperature_2m_min,sunrise,sunset,daylight_duration,uv_index_max,precipitation_sum,precipitation_probability_max,precipitation_hours,wind_speed_10m_max,wind_gusts_10m_max',
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'timezone': timezone,
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'forecast_days': '14',
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'models': PreferencesHelper.getString("selectedWeatherModel") ?? "best_match"
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});
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final airQualityUri = Uri.parse('https://air-quality-api.open-meteo.com/v1/air-quality').replace(queryParameters: {
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'latitude': lat.toString(),
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'longitude': lon.toString(),
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'current': 'us_aqi,european_aqi,pm10,pm2_5,carbon_monoxide,nitrogen_dioxide,sulphur_dioxide,ozone,alder_pollen,birch_pollen,grass_pollen,mugwort_pollen,olive_pollen,ragweed_pollen',
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'timezone': timezone,
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'forecast_hours': '1',
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});
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// final response = await http.get(uri);
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// final data = json.decode(response.body) as Map<String, dynamic>;
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final responses = await Future.wait([
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http.get(uri),
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http.get(airQualityUri),
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]);
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final weatherData = json.decode(responses[0].body) as Map<String, dynamic>;
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final airQualityData = json.decode(responses[1].body) as Map<String, dynamic>;
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weatherData['current'] = sanitizeCurrent(weatherData['current']);
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weatherData['hourly'] = sanitizeHourly(weatherData['hourly']);
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weatherData['daily'] = sanitizeDaily(weatherData['daily']);
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if (weatherData['error'] == true || airQualityData['error'] == true) {
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final reason = weatherData['reason'] ?? airQualityData['reason'] ?? 'Unknown error';
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if (context != null) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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duration: Duration(seconds: 10),
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content: Text("$reason. Please change your model"),
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action: SnackBarAction(
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label: 'Change model',
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onPressed: () {
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Navigator.of(context).push(
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MaterialPageRoute(builder: (_) => const MeteoModelsPage()),
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);
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},
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),
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),
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);
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}
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return null;
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}
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final combinedDataForView = {
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...weatherData,
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'air_quality': airQualityData,
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};
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final nowForView = DateTime.now().toIso8601String();
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if (isOnlyView) {
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log("Only viewing data for $key. Not saving to cache.");
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return {
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'data': combinedDataForView,
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'last_updated': nowForView,
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'from_cache': false,
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};
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}
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final existingJson = box.get(key);
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if (existingJson != null) {
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final cachedMap = json.decode(existingJson);
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final cachedData = cachedMap['data'];
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final lastUpdated = cachedMap['last_updated'];
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if (json.encode(cachedData['current']) == json.encode(weatherData['current']) &&
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json.encode(cachedData['air_quality'] ?? {}) == json.encode(airQualityData)) {
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log("Hive: No update needed for $key");
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return {
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'data': cachedData,
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'last_updated': lastUpdated,
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'from_cache': true,
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};
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}
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}
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final now = DateTime.now().toIso8601String();
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final combinedData = {
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...weatherData,
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'air_quality': airQualityData,
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};
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final wrappedData = {
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'data': combinedData,
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'last_updated': now,
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};
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await box.put(key, json.encode(wrappedData));
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log("Hive: Updated cache for $key at $now");
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return {
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'data': combinedData,
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'last_updated': now,
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'from_cache': false,
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};
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}
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T nullSafeValue<T extends num>(dynamic value) {
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if (value == null) {
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if (T == int) return 0000 as T;
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if (T == double) return 0.0000001 as T;
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return 0 as T;
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}
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if (value is T) return value;
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if (value is num) {
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if (T == int) return value.toInt() as T;
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if (T == double) return value.toDouble() as T;
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}
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return T == int ? 0 as T : 0.0000001 as T;
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}
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Map<String, dynamic> sanitizeCurrent(Map? current) {
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current ??= {};
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return {
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'temperature_2m': nullSafeValue<double>(current['temperature_2m']),
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'apparent_temperature': nullSafeValue<double>(current['apparent_temperature']),
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'pressure_msl': nullSafeValue<double>(current['pressure_msl']),
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'relative_humidity_2m': nullSafeValue(current['relative_humidity_2m']),
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'precipitation': nullSafeValue<double>(current['precipitation']),
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'weather_code': nullSafeValue<int>(current['weather_code']),
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'cloud_cover': nullSafeValue<int>(current['cloud_cover']),
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'wind_speed_10m': nullSafeValue<double>(current['wind_speed_10m']),
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'wind_direction_10m': nullSafeValue<int>(current['wind_direction_10m']),
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'wind_gusts_10m': nullSafeValue<double>(current['wind_gusts_10m']),
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'is_day': nullSafeValue<int>(current['is_day']),
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};
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}
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Map<String, dynamic> sanitizeHourly(Map? hourly) {
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hourly ??= {};
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return {
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'time': (hourly['time'] as List?) ?? [],
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'wind_speed_10m': (hourly['wind_speed_10m'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'wind_direction_10m': (hourly['wind_direction_10m'] as List?)?.map((v) => nullSafeValue<int>(v)).toList() ?? [],
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'relative_humidity_2m': (hourly['relative_humidity_2m'] as List?)?.map((v) => nullSafeValue<int>(v)).toList() ?? [],
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'pressure_msl': (hourly['pressure_msl'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'cloud_cover': (hourly['cloud_cover'] as List?)?.map((v) => nullSafeValue<int>(v)).toList() ?? [],
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'temperature_2m': (hourly['temperature_2m'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'dew_point_2m': (hourly['dew_point_2m'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'apparent_temperature': (hourly['apparent_temperature'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'precipitation_probability': (hourly['precipitation_probability'] as List?)?.map((v) => nullSafeValue<int>(v)).toList() ?? [],
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'precipitation': (hourly['precipitation'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'weather_code': (hourly['weather_code'] as List?)?.map((v) => nullSafeValue<int>(v)).toList() ?? [],
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'visibility': (hourly['visibility'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'uv_index': (hourly['uv_index'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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};
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}
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Map<String, dynamic> sanitizeDaily(Map? daily) {
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daily ??= {};
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return {
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'time': (daily['time'] as List?) ?? [],
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'weather_code': (daily['weather_code'] as List?)?.map((v) => nullSafeValue<int>(v)).toList() ?? [],
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'temperature_2m_max': (daily['temperature_2m_max'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'temperature_2m_min': (daily['temperature_2m_min'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'sunrise': (daily['sunrise'] as List?) ?? [],
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'sunset': (daily['sunset'] as List?) ?? [],
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'daylight_duration': (daily['daylight_duration'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'uv_index_max': (daily['uv_index_max'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'precipitation_sum': (daily['precipitation_sum'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'precipitation_probability_max': (daily['precipitation_probability_max'] as List?)?.map((v) => nullSafeValue<int>(v)).toList() ?? [],
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'precipitation_hours': (daily['precipitation_hours'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'wind_speed_10m_max': (daily['wind_speed_10m_max'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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'wind_gusts_10m_max': (daily['wind_gusts_10m_max'] as List?)?.map((v) => nullSafeValue<double>(v)).toList() ?? [],
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};
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}
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}
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