OpenWeather-gRPC-API/server/location.go

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package main
import (
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"context"
"encoding/json"
"io/ioutil"
"log"
"net/http"
pb "codeberg.org/andcscott/OpenWeatherMap-gRPC-API/proto"
)
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type Coordinates struct {
Latitude float32 `json:"lat"`
Longitude float32 `json:"lon"`
}
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// Receives a gRPC request for Location
// Returns a SendLocation message with the Latitude and Longitude
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func (s *Server) Location(ctx context.Context, in *pb.RequestLocation) (*pb.SendLocation, error) {
log.Println("'Location' function called...")
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lat, lon := getLocation(in.City, s.ApiKey)
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return &pb.SendLocation{
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Latitude: lat,
Longitude: lon,
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}, nil
}
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// Used internally to fetch precise locations
// Receives gRPC requests (interface) and the location (string)
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// Returns the latitude (float32) and longitude (float32) for a given location
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func getLocation(city string, key string) (float32, float32) {
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url := "http://api.openweathermap.org/geo/1.0/direct?q="
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token := "&appid=" + key
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url = url + city + token
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res, err := http.Get(url)
if err != nil {
log.Printf("Error fetching location: %v\n", err)
}
defer res.Body.Close()
body, err := ioutil.ReadAll(res.Body)
if err != nil {
log.Printf("Error reading location: %v\n", err)
}
coords := []Coordinates{}
err = json.Unmarshal(body, &coords)
if err != nil {
log.Printf("Error decoding JSON: %v\n", err)
}
return coords[0].Latitude, coords[0].Longitude
}