Description:

weather pack

🌦 weather_pack #





A quick way to get access to weather conditions.
Why choose this library?
basic:

🚲 Easy to use - you only need the APIKEY.
🏝 Built-in geocoding - search for locations by assumed names or by coordinates.
🩺 Various units of measurement - speed, temperature, pressure and cardinal points.
🌤 There are original weather icons.

advanced: (Click to open)

🔮 At least one release application is already based on this package. Therefore, there is an
additional guarantee of security and timely updates of this package.
🔓 There is a method for checking your api for correctness.
🧱 It is very easy to customize data models. Create your own data models and take only what
you need from the built-in ones.
🧾 The code is well documented and each class is labeled and decoded. There are unit tests
for the main functions of the package.
🦺 Safe unpacking of types. If the server stops outputting values - your weather model
will have a null field and the application will not crash.
🔧 This package has no unnecessary dependencies and contains minimal code.
Also, all platforms are supported.


Endpoints openweathermap.org #
Let's agree to designate Openweathermap as OWM.
The library uses the following site endpoints openweathermap.org:



api.openweathermap.org{/path/endpoint}
A {Class.method} that uses this endpoint
See more




/data/2.5/weather
WeatherService.currentWeatherByLocation
current


/data/2.5/onecall
WeatherService.oneCallWeatherByLocation
one-call-api


/data/3.0/onecall
WeatherService.oneCallWeatherByLocation
one-call-3


/geo/1.0/direct
GeocodingService.getLocationByCityName
geocoding-direct


/geo/1.0/reverse
GeocodingService.getLocationByCoordinates
geocoding-reverse




Table of Contents #


🌦 weather_pack
Endpoints openweathermap.org
Table of Contents
Installing
Getting Started
Usage weather service
Usage geocoding service
Usage units measure
Exception handling
Usage custom client
Usage weather icons
API key testing
Resources
Author
Support


Installing #

Add dependency to your pubspec.yaml:
dependencies:
weather_pack: ^<latest_version>
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Run the command: flutter pub get
Use in your code:
import 'package:weather_pack/weather_pack.dart';
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*Additionally, pull package locally to examine example folder:
flutter pub unpack
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weather_in_console - Dart console application
create_code_for_readme - all examples from current manual
example - easy use



Getting Started #
The easiest way to get the current weather:
Future<void> main() async {
const api = 'YOUR_APIKEY'; // TODO: change to your openweathermap APIkey
final wService = WeatherService(api);

// get the current weather in Amsterdam
final WeatherCurrent currently = await wService.currentWeatherByLocation(
latitude: 52.374, longitude: 4.88969);

print(currently);
}
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You can also change the request language:
final lang = WeatherLanguage.arabic;

final wService = WeatherService(api, language: lang);
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Supported languages: (Click to open)

Afrikaans
Albanian
Arabic
Azerbaijani
Bulgarian
Catalan
Czech
Danish
German
Greek
English
Basque
Persian
Farsi
Finnish
French
Galician
Hebrew
Hindi
Croatian
Hungarian
Indonesian
Italian
Japanese
Korean
Latvian
Latvian
Macedonian
Norwegian
Dutch
Polish
Portuguese
Português Brasil
Romanian
Russian
Swedish
Slovak
Slovenian
Spanish
Serbian
Thai
Turkish
Ukrainian
Vietnamese
Chinese Simplified
Chinese Traditional
Zulu


According to OWM service (See more):

You can use the lang parameter to get the output in your language.
Translation is applied for the city name and description fields.

Usage weather service #
Now there are two weather models - WeatherCurrent and WeatherOneCall.
WeatherOneCall includes:

WeatherCurrent
List<WeatherHourly>
List<WeatherMinutely>
List<WeatherDaily>
List<WeatherAlert>

How to use?
You can get the weather in the following way:
Future<void> getOnecallWeatherWays({String api = 'Your_APIkey'}) async {
final wService2_5 = WeatherService(api, oneCallApi: OneCallApi.api_2_5);

final WeatherOneCall onecall2_5 = await wService2_5.oneCallWeatherByLocation(
latitude: 52.374, longitude: 4.88969);

print(onecall2_5);

// if you use the "One Call API 3.0" subscription that...

final wService3_0 = WeatherService(api, oneCallApi: OneCallApi.api_3_0);

final WeatherOneCall onecall3_0 = await wService3_0.oneCallWeatherByLocation(
latitude: 52.374, longitude: 4.88969);

print(onecall3_0);
}
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Why do you only use the weather search by coordinates?
According to the website OWM:

Please use Geocoder API if you need automatic convert city names and zip-codes to geo
coordinates and the other way around.
Please note that built-in geocoder has been deprecated. Although it is still available for use,
bug fixing and updates are no longer available for this functionality.

Usage geocoding service #
GeocodingService is a service for easy location search when working with geographical names
and coordinates. Supports both the direct and reverse methods:

Direct geocoding converts the specified name of a location or zip/post code into
the exact geographical coordinates;
Reverse geocoding converts the geographical coordinates into the names of the nearby locations;

You can find out more at this link: Geocoding API OpenWeather
How to use?
Create GeocodingService in the following way:
final String cityName = 'suggested location name';
final String apiKey = 'your api key for OWM';

final GeocodingService gService = GeocodingService(apiKey);
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To find using place names use direct geocoding:
final List<PlaceGeocode> places = await gService.getLocationByCityName(cityName);
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or use reverse geocoding
final List<PlaceGeocode> places = await gService.getLocationByCoordinates(
latitude: 52.374, longitude: 4.88969);
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Usage units measure #
By default, all weather models, e.g. WeatherCurrent, have measurable values of type double.
To display the data in a convenient format, it is necessary use the conversion method value
or valueToString:
void worksTempUnits({
double temp = 270.78, // ex. received from [WeatherCurrent.temp]
int precision = 3,
Temp unitsMeasure = Temp.celsius,
}) {
// The default temperature is measured in Kelvin of the `double` type.
// We need the temperature to be displayed in Celsius to 3 decimal places

print(unitsMeasure.value(temp, precision)); // `-2.37` type `double`
print(unitsMeasure.valueToString(temp, precision)); // `-2.370` type `String`

// if precision is 0:
print(unitsMeasure.value(temp, 0)); // `-2.0` type `double`
print(unitsMeasure.valueToString(temp, 0)); // `-2` type `String`
}
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By and large, the valueToString() method is needed to display correctly in ui,
and the value() method is for accurate calculations.
There are several units of measurement:



Units of measure
Class
Supported units
Conversion




Temperature
Temp
kelvin, celsius, fahrenheit
+


Speed
Speed
ms, mph, kph
+


Pressure
Pressure
hectoPa, mbar, mmHg, kPa, atm, inHg
+


Cardinal points
SideOfTheWorld
n, ne, e, se, s, sw, w, nw
+(another)



💡 Tip: The SideOfTheWorld enum contains a static method fromDegrees() for converting degrees
to cardinal directions.
Exception handling #
Each of the methods in the WeatherService and GeocodingService services can throw an OwmApiException exception. You can process them as follows:
void exceptionHandling() async {
final wService = WeatherService('bRoKen_aPi');

WeatherCurrent? current;
try {
current =
await wService.currentWeatherByLocation(latitude: 1, longitude: 1);
} on OwmApiException catch (e, s) {
print(e.code);
print(e.message);
print(s);
}
}
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Usage custom client #
For GeocodingService and WeatherService you can create a custom OWMBuilder for debugging and logging cases:
class OWMBuilderCustom extends OWMBuilder {
/// We output the url to the console for debugging and logging
@override
Future<T> getData<T>(
{required Uri uri, required T Function(dynamic data) builder}) {
print(uri);
return super.getData(uri: uri, builder: builder);
}
}

void workOwmBuilder({
String api = 'your_apikey',
}) async {
final customOWMBuilder = OWMBuilderCustom();
final gService = GeocodingService(api, owmBuilder: customOWMBuilder);

final List<PlaceGeocode> places = await gService.getLocationByCoordinates(
latitude: 52.374, longitude: 4.88969);

print(places);
}
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For OWMTestService you can create a custom Client. A more low-level way, would require an explicit dependency on the http package:
class CustomClient extends IOClient {
/// We output the url to the console
@override
Future<Response> get(Uri url, {Map<String, String>? headers}) {
print(url);
return super.get(url, headers: headers);
}
}

/// We output the url to the console for debugging
void workCustomClient({
String api = 'your_apikey',
}) async {
final customClient = CustomClient();
final testService = OWMTestService(api, customClient);

final bool isValidKey = await testService.isValidApikey();

print(isValidKey);
}
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Usage weather icons #
You can use weather icons provided by the OWM service. See more about weather conditions.
Icons are stored locally in this package at the path assets/weather_icons/.
They are ordered according to Declaring resolution-aware image assets.
This reflects the following correspondences:
100*100 - in default(implied resolution @1)
200x200 - @2
300x300 - @3
400x400 - @4
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with the preservation of image quality.
How to use?
Get the weather icon in a safe way:
Image getWeatherIcon(String weatherIcon) {
return Image.asset(
ImagePathWeather.getPathWeatherIcon(weatherIcon),
filterQuality: FilterQuality.high, // optional
package: ImagePathWeather.packageName,
);
}
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or to process it completely by hand:
Widget getWeatherIcon(WeatherCurrent weather) {
return Image.asset(
'assets/weather_icons/${weather.weatherIcon}.png', // icon path
package: 'weather_pack', // name package
filterQuality: FilterQuality.high, // optional
errorBuilder: (c, e, s) => Text(e), // will return the widget in case of an error
);
}
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In this case, you can use the best quality regardless of platform resolution by specifying @4 to path:
'assets/weather_icons/@4/$weatherIcon.png'
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API key testing #
It is possible to test the API key.
To do this, the OWMTestService class has a method isValidApikeyForOneCall:
/// If the apikey is valid, `OWMApiTest` methods will return `true`
Future<void> testAPIkey({
String testedAPIkey = 'your_apikey',
}) async {
// checking key for geocoding service and for (fetching WeatherCurrent)
final bool isValid = await OWMTestService(testedAPIkey).isValidApikey();

// checking key for "One Call API 2.5" service (fetching WeatherOneCall)
final bool isValidOneCall2 = await OWMTestService(testedAPIkey)
.isValidApikeyForOneCall(OneCallApi.api_2_5);

// or
// checking key for "One Call by Call 3.0" service (fetching WeatherOneCall)
final bool isValidOneCall3 = await OWMTestService(testedAPIkey)
.isValidApikeyForOneCall(OneCallApi.api_3_0);
}
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Resources #

folder example.
There is a simple example of how to use the basic functions of the package, as well as a console mini-application without using flutter

Как создать консольное приложение на языке dart, используя пакет weather_pack?
How to create a console application in dart using the weather_pack package?





Feel free to suggest materials for inclusion in this list ^_~
Author #
You can contact me or check out my activities on the following platforms:

Github
Telegram Group
StackOverflow
Medium
Habr


Made with ❤️. Enjoy it!

Support #
Feel free to contribute to this project.
If you find a bug or want a feature, but don't know how to fix/implement it, please fill an issue.
If you fixed a bug or implemented a feature, please send a pull request. Use dev branch for this.


🏷 tags: weather, openWeather, openweathermap, weather forecast, metcast, W/F, reverse/direct geocoding, units measure, temperature, pressure, speed

License

For personal and professional use. You cannot resell or redistribute these repositories in their original state.

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