add currency command

cmd/nourybot/commands.go

@@ -29,6 +29,21 @@ func (app *Application) ParseCommand(evt *event.Event) {
 		app.SendText(evt, "XD !")
 		return
 
+	case "currency":
+		if msgLen < 4 {
+			app.SendText(evt, "Not enough arguments provided")
+			return
+		} else {
+			if resp, err := commands.Currency(cmdParams[1], cmdParams[2], cmdParams[4]); err != nil {
+				app.Log.Error().Err(err).Msg("Failed to handle Xkcd command")
+				app.SendText(evt, "Something went wrong.")
+				return
+			} else {
+				app.SendText(evt, resp)
+				return
+			}
+		}
+
 	case "ping":
 		if resp, err := commands.Ping(); err != nil {
 			app.Log.Error().Err(err).Msg("Failed to handle Ping command")

internal/commands/commands.go

@@ -3,7 +3,6 @@ package commands
 import "errors"
 
 var (
-	ErrEnvFileNotFound     = errors.New(".env file not found")
 	ErrInternalServerError     = errors.New("internal server error")
-	ErrLocationNotFound    = errors.New("location not found")
+	ErrWeatherLocationNotFound = errors.New("location not found")
 )

internal/commands/currency.go

@@ -0,0 +1,30 @@
+package commands
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+)
+
+func Currency(currAmount, currFrom, currTo string) (string, error) {
+	basePath := "https://decapi.me/misc/currency/"
+	from := fmt.Sprintf("?from=%s", currFrom)
+	to := fmt.Sprintf("&to=%s", currTo)
+	value := fmt.Sprintf("&value=%s", currAmount)
+
+	// https://decapi.me/misc/currency/?from=usd&to=usd&value=10
+	resp, err := http.Get(fmt.Sprint(basePath + from + to + value))
+	if err != nil {
+		return "", ErrInternalServerError
+	}
+
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", ErrInternalServerError
+	}
+
+	reply := string(body)
+	return reply, nil
+}

internal/commands/weather.go

@@ -29,7 +29,7 @@ func Weather(location string) (string, error) {
 	// 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
+		return "", ErrWeatherLocationNotFound
 	} 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.",