Open-Meteo weather provider

[DadiBit]

Checklist

• [X] I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• [X] I have already checked the WIKI pages and made sure that the feature isn't already exist.
• [X] I have taken the time to fill in all the required details. I understand that the feature request will be dismissed otherwise.
• [X] This issue contains only one feature request.

Feature description

Hello, I would like to help implement the Open-Meteo API in the launcher, as it requires no API key (hence it's more user-friendly). I'm currently the only contributor to the open-meteo-api-kotlin library, and I haven't finished it, but I feel like to could benefit this project. Some "pseudo-code":

• Create an Endpoint with GeocodingSearch.context
• Use the geocoding search endpoint to find one matching place
• Get the first (and only) result coordinates (should be saved in the settings -> add ability to use coordinates only*)
• Create an Endpoint with Forecast.context
• Call the endpoint with Forecast.Query(latitude, longitude, currentWeather = true, /* units */)
• Get the response current weather:
  • response.currentWeather?.temperature for the temperature
  • response.currentWeather?.weatherCode?.message for the printable message
  • response.currentWeather?.weatherCode?.code for the wmo int code (see at the end of the docs)

If you need the weather forecast, I would recommend to instead:

• Query using the invoke operator: openMeteo(...)
  • ForecastHourly.Temperature2m
  • ForecastHourly.Weathercode (convertible with WeatherCode.from(it))
    • Get a printable name (message)
    • Get a Short code to map icons (code)
  • ForecastDaily.Sunrise and ForecastDaily.Sunset (convertible with Time(it))
    • To know if it's day or night (please note that I'm still working on TimeZone usage)
• Cache all the information needed and update every N hours

*Note: if GPS auto-location were to be implemented, it would be easy to update the coordinates (next version will have var coordinates)

Additional information

A nice feature of the API is that it provides hourly/daily values up to a week, easing data caching. I'd like also to receive some inputs on how I could make the library more accessible to other developers (I know that the documentation and tests are completely missing in version 0.2.0-alpha, please have mercy), in order to ease the transaction to it.

[iamrasel]

What to input as location? Longitude-latitude or city name?

[DadiBit]

What to input as location? Longitude-latitude or city name?

Currently the client constructor accepts:

• City names as strings (defaulting to 0,0 coordinates)
• Coordinates pair (coordinates: Pair<Float, Float>)
• latitude and longitude (both floats)

[iamrasel]

Okay, i'll try it. Thanks for the suggestion.

[DadiBit]

I did some testing and I realized the library is just overkill for the launcher (1+ MB = too heavy): I'll work on a fork without implementing the library, but instead implementing the useful parts (protobuf isn't needed, as only one city name is retrieved).

[iamrasel]

You can open a pull request for a successful implementation, thanks.

[HeCodes2Much]

if the app can some how get the Longitude-latitude via location and still be able to be on fdroid aka no play services that would be good then the weather could also auto update location

[iamrasel]

@The-Repo-Club I think, inputting location data manually is more privacy friendly.

[HeCodes2Much]

ya having the option if wanting to would be nice though doesn't need to be on by default :)