api.go

package main

import (
	"encoding/json"
	"io/ioutil"
	"net/http"

	"github.com/ChristianHering/Thermostat/utils"
	"github.com/pkg/errors"
)

//WeatherData stores responses from
//OpenWeatherMap's one call endpoint
type WeatherData struct {
	Lat            float64 `json:"lat"`
	Lon            float64 `json:"lon"`
	Timezone       string  `json:"timezone"`
	TimezoneOffset int     `json:"timezone_offset"`
	Current        struct {
		Dt         int     `json:"dt"`
		Sunrise    int     `json:"sunrise"`
		Sunset     int     `json:"sunset"`
		Temp       float64 `json:"temp"`
		FeelsLike  float64 `json:"feels_like"`
		Pressure   int     `json:"pressure"`
		Humidity   int     `json:"humidity"`
		DewPoint   float64 `json:"dew_point"`
		Uvi        float64 `json:"uvi"`
		Clouds     int     `json:"clouds"`
		Visibility int     `json:"visibility"`
		WindSpeed  float64 `json:"wind_speed"`
		WindDeg    int     `json:"wind_deg"`
		Weather    []struct {
			ID          int    `json:"id"`
			Main        string `json:"main"`
			Description string `json:"description"`
			Icon        string `json:"icon"`
		} `json:"weather"`
	} `json:"current"`
	Minutely []struct {
		Dt            int     `json:"dt"`
		Precipitation float64 `json:"precipitation"`
	} `json:"minutely"`
	Hourly []struct {
		Dt         int     `json:"dt"`
		Temp       float64 `json:"temp"`
		FeelsLike  float64 `json:"feels_like"`
		Pressure   int     `json:"pressure"`
		Humidity   int     `json:"humidity"`
		DewPoint   float64 `json:"dew_point"`
		Uvi        float64 `json:"uvi"`
		Clouds     int     `json:"clouds"`
		Visibility int     `json:"visibility"`
		WindSpeed  float64 `json:"wind_speed"`
		WindDeg    int     `json:"wind_deg"`
		WindGust   float64 `json:"wind_gust"`
		Weather    []struct {
			ID          int    `json:"id"`
			Main        string `json:"main"`
			Description string `json:"description"`
			Icon        string `json:"icon"`
		} `json:"weather"`
		Pop float64 `json:"pop"`
	} `json:"hourly"`
	Daily []struct {
		Dt        int     `json:"dt"`
		Sunrise   int     `json:"sunrise"`
		Sunset    int     `json:"sunset"`
		Moonrise  int     `json:"moonrise"`
		Moonset   int     `json:"moonset"`
		MoonPhase float64 `json:"moon_phase"`
		Temp      struct {
			Day   float64 `json:"day"`
			Min   float64 `json:"min"`
			Max   float64 `json:"max"`
			Night float64 `json:"night"`
			Eve   float64 `json:"eve"`
			Morn  float64 `json:"morn"`
		} `json:"temp"`
		FeelsLike struct {
			Day   float64 `json:"day"`
			Night float64 `json:"night"`
			Eve   float64 `json:"eve"`
			Morn  float64 `json:"morn"`
		} `json:"feels_like"`
		Pressure  int     `json:"pressure"`
		Humidity  int     `json:"humidity"`
		DewPoint  float64 `json:"dew_point"`
		WindSpeed float64 `json:"wind_speed"`
		WindDeg   int     `json:"wind_deg"`
		WindGust  float64 `json:"wind_gust"`
		Weather   []struct {
			ID          int    `json:"id"`
			Main        string `json:"main"`
			Description string `json:"description"`
			Icon        string `json:"icon"`
		} `json:"weather"`
		Clouds int     `json:"clouds"`
		Pop    float64 `json:"pop"`
		Uvi    float64 `json:"uvi"`
		Rain   float64 `json:"rain,omitempty"`
	} `json:"daily"`
	Alerts []struct {
		SenderName  string   `json:"sender_name"`
		Event       string   `json:"event"`
		Start       int      `json:"start"`
		End         int      `json:"end"`
		Description string   `json:"description"`
		Tags        []string `json:"tags"`
	} `json:"alerts,omitempty"`
}

//getWeatherData returns a struct of weather
//data from OpenWeatherMap's one call API
func getWeatherData() (WD WeatherData, err error) {
	resp, err := http.Get("https://api.openweathermap.org/data/2.5/onecall?lat=" + utils.Config.Latitude + "&lon=" + utils.Config.Longitude + "&units=" + utils.Config.DataUnits + "&appid=" + utils.Config.APIKey)
	if err != nil {
		return WD, errors.WithStack(err)
	}
	defer resp.Body.Close()

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return WD, errors.WithStack(err)
	}

	err = json.Unmarshal(body, &WD)
	if err != nil {
		return WD, errors.WithStack(err)
	}

	return WD, nil
}