OpenWeather-gRPC-API/server/five_day.go

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2022-09-02 22:50:27 -04:00
package main
import (
"context"
"fmt"
"log"
pb "codeberg.org/andcscott/OpenWeather-gRPC-API/proto"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// Receives a gRPC request for an extended forecast
// Returns a SendFiveDay message with the forecast as JSON
func (s *Server) FiveDay(ctx context.Context, in *pb.RequestFiveDay) (*pb.SendFiveDay, error) {
log.Printf("'FiveDay' called: %v\n", in)
token := "&appid=" + s.ApiKey
url, err := s.createFiveDayUrl(in)
if err != nil {
return nil, status.Errorf(
codes.InvalidArgument,
fmt.Sprintf(
"Invalid location or location type: %v, %v\n",
in.Location,
in.LocationType,
))
}
fcst, err := fetchForecast(url + token)
if err != nil {
return nil, status.Errorf(
codes.Internal,
fmt.Sprintf(
"A server error occurred while fetching the forecast: %v\n",
err,
))
}
return &pb.SendFiveDay{
Payload: fcst,
}, nil
}
// Assembles the URL for five day requests to Open Weather
func (s *Server) createFiveDayUrl(in *pb.RequestFiveDay) (string, error) {
url := "https://api.openweathermap.org/data/2.5/forecast?"
units := updateUnits(in.Units)
lat, lon, err := s.fetchLocation(in.LocationType, in.Location)
if err != nil {
return "", err
}
url += fmt.Sprintf("lat=%f", lat) + fmt.Sprintf("&lon=%f", lon) + units
return url, nil
}