add weather command

cmd/nourybot/commands.go

@@ -71,5 +71,21 @@ func (app *Application) ParseCommand(evt *event.Event) {
 				return
 			}
 		}
+
+	case "weather":
+		if msgLen < 2 {
+			app.SendText(evt, "Not enough arguments provided")
+			return
+		} else {
+			location := evt.Content.AsMessage().Body[9:len(evt.Content.AsMessage().Body)]
+			if resp, err := commands.Weather(location); err != nil {
+				app.Log.Error().Err(err).Msg("Failed to handle Weather command")
+				app.SendText(evt, "Something went wrong.")
+				return
+			} else {
+				app.SendText(evt, resp)
+				return
+			}
+		}
 	}
 }

go.mod

@@ -11,6 +11,7 @@ require (
 )
 
 require (
+	github.com/briandowns/openweathermap v0.19.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.18 // indirect
 	github.com/tidwall/gjson v1.14.4 // indirect

go.sum

@@ -1,4 +1,6 @@
 github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
+github.com/briandowns/openweathermap v0.19.0 h1:nkopLMEtZLxbZI1th6dOG6xkajpszofqf53r5K8mT9k=
+github.com/briandowns/openweathermap v0.19.0/go.mod h1:0GLnknqicWxXnGi1IqoOaZIw+kIe5hkt+YM5WY3j8+0=
 github.com/chzyer/logex v1.2.1 h1:XHDu3E6q+gdHgsdTPH6ImJMIp436vR6MPtH8gP05QzM=
 github.com/chzyer/logex v1.2.1/go.mod h1:JLbx6lG2kDbNRFnfkgvh4eRJRPX1QCoOIWomwysCBrQ=
 github.com/chzyer/readline v1.5.1 h1:upd/6fQk4src78LMRzh5vItIt361/o4uq553V8B5sGI=

internal/commands/commands.go

@@ -1 +1,9 @@
 package commands
+
+import "errors"
+
+var (
+	ErrEnvFileNotFound     = errors.New(".env file not found")
+	ErrInternalServerError = errors.New("internal server error")
+	ErrLocationNotFound    = errors.New("location not found")
+)

internal/commands/weather.go

@@ -0,0 +1,47 @@
+package commands
+
+import (
+	"fmt"
+	"os"
+
+	owm "github.com/briandowns/openweathermap"
+	"github.com/joho/godotenv"
+)
+
+// Weather queries the OpenWeatherMap Api for the given location and sends the
+// current weather response to the target twitch chat.
+func Weather(location string) (string, error) {
+	err := godotenv.Load()
+	if err != nil {
+		return "", ErrInternalServerError
+	}
+	owmKey := os.Getenv("OWM_KEY")
+
+	w, err := owm.NewCurrent("C", "en", owmKey)
+	if err != nil {
+		return "", ErrInternalServerError
+	}
+
+	if err := w.CurrentByName(location); err != nil {
+		return "", ErrInternalServerError
+	}
+
+	// Longitude and Latitude are returned as 0 when the supplied location couldn't be
+	// assigned to a OpenWeatherMap location.
+	if w.GeoPos.Longitude == 0 && w.GeoPos.Latitude == 0 {
+		return "", ErrLocationNotFound
+	} else {
+		// Weather for Vilnius, LT: Feels like: 29.67°C. Currently 29.49°C with a high of 29.84°C and a low of 29.49°C, humidity: 45%, wind: 6.17m/s.
+		reply := fmt.Sprintf("Weather for %s, %s: Feels like: %v°C. Currently %v°C with a high of %v°C and a low of %v°C, humidity: %v%%, wind: %vm/s.",
+			w.Name,
+			w.Sys.Country,
+			w.Main.FeelsLike,
+			w.Main.Temp,
+			w.Main.TempMax,
+			w.Main.TempMin,
+			w.Main.Humidity,
+			w.Wind.Speed,
+		)
+		return reply, nil
+	}
+}

internal/commands/xkcd.go

@@ -17,15 +17,15 @@ type xkcdResponse struct {
 func Xkcd() (string, error) {
 	response, err := http.Get("https://xkcd.com/info.0.json")
 	if err != nil {
-		return "", err
+		return "", ErrInternalServerError
 	}
 	responseData, err := io.ReadAll(response.Body)
 	if err != nil {
-		return "", err
+		return "", ErrInternalServerError
 	}
 	var responseObject xkcdResponse
 	if err = json.Unmarshal(responseData, &responseObject); err != nil {
-		return "", err
+		return "", ErrInternalServerError
 	}
 
 	reply := fmt.Sprint("Current Xkcd #", responseObject.Num, " Title: ", responseObject.SafeTitle, " ", responseObject.Img)
@@ -38,15 +38,15 @@ func RandomXkcd() (string, error) {
 
 	response, err := http.Get(fmt.Sprint("http://xkcd.com/" + comicNum + "/info.0.json"))
 	if err != nil {
-		return "", err
+		return "", ErrInternalServerError
 	}
 	responseData, err := io.ReadAll(response.Body)
 	if err != nil {
-		return "", err
+		return "", ErrInternalServerError
 	}
 	var responseObject xkcdResponse
 	if err = json.Unmarshal(responseData, &responseObject); err != nil {
-		return "", err
+		return "", ErrInternalServerError
 	}
 
 	reply := fmt.Sprint("Random Xkcd #", responseObject.Num, " Title: ", responseObject.SafeTitle, " ", responseObject.Img)