add currency/preview/weather command

cmd/bot/commands.go

@@ -3,7 +3,7 @@ package main
 import (
 	"strings"
 
-	"github.com/lyx0/nourybot-matrix/pkg/owm"
+	"github.com/lyx0/nourybot-matrix/pkg/commands"
 	"maunium.net/go/mautrix/event"
 )
 
@@ -21,7 +21,7 @@ func (app *application) ParseCommand(evt *event.Event) {
 
 	// msgLen is the amount of words in a message without the prefix.
 	// Useful to check if enough cmdParams are provided.
-	//msgLen := len(strings.SplitN(evt.Content.AsMessage().Body, " ", -2))
+	msgLen := len(strings.SplitN(evt.Content.AsMessage().Body, " ", -1))
 
 	app.Log.Info().Msgf("Command: %s", evt.Content.AsMessage().Body)
 
@@ -30,16 +30,42 @@ func (app *application) ParseCommand(evt *event.Event) {
 	case "xd":
 		app.SendText(evt, "xd !")
 		return
+
+	case "currency":
+		if msgLen <= 4 {
+			reply = "Not enough arguments provided. Usage: ()currency 10 USD to EUR"
+		} else {
+			reply, _ = commands.Currency(cmdParams[1], cmdParams[2], cmdParams[4])
+		}
 	case "gofile":
-		app.NewDownload("gofile", evt, cmdParams[1])
+		if msgLen < 2 {
-		return
+			reply = "Not enough arguments provided. Usage: !gofile [link]"
+		} else {
+			app.NewDownload("gofile", evt, cmdParams[1])
+			return
+		}
+
+	case "preview":
+		if msgLen < 2 {
+			reply = "Not enough arguments provided. Usage: !preview [stream]"
+		} else {
+			reply = commands.Preview(cmdParams[1])
+		}
 
 	case "weather":
-		reply, _ = owm.Weather(evt.Content.AsMessage().Body[9:len(evt.Content.AsMessage().Body)])
+		if msgLen < 2 {
+			reply = "Not enough arguments provided. Usage: !weather [location]"
+		} else {
+			reply, _ = commands.Weather(evt.Content.AsMessage().Body[9:len(evt.Content.AsMessage().Body)])
+		}
 
 	case "yaf":
-		app.NewDownload("yaf", evt, cmdParams[1])
+		if msgLen < 2 {
-		return
+			reply = "Not enough arguments provided. Usage: !gofile [link]"
+		} else {
+			app.NewDownload("yaf", evt, cmdParams[1])
+			return
+		}
 
 	}
 	if reply != "" {

pkg/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
+}

pkg/commands/errors.go

@@ -0,0 +1,8 @@
+package commands
+
+import "errors"
+
+var (
+	ErrInternalServerError     = errors.New("internal server error")
+	ErrWeatherLocationNotFound = errors.New("location not found")
+)

pkg/commands/preview.go

@@ -0,0 +1,15 @@
+package commands
+
+import (
+	"fmt"
+
+	"github.com/lyx0/nourybot-matrix/pkg/common"
+)
+
+func Preview(channel string) string {
+	imageHeight := common.GenerateRandomNumberRange(1040, 1080)
+	imageWidth := common.GenerateRandomNumberRange(1890, 1920)
+
+	reply := fmt.Sprintf("https://static-cdn.jtvnw.net/previews-ttv/live_user_%s-%vx%v.jpg", channel, imageWidth, imageHeight)
+	return reply
+}

pkg/commands/weather.go

@@ -1,7 +1,6 @@
-package owm
+package commands
 
 import (
-	"errors"
 	"fmt"
 	"os"
 
@@ -9,11 +8,6 @@ import (
 	"github.com/joho/godotenv"
 )
 
-var (
-	ErrInternalServerError     = errors.New("internal server error")
-	ErrWeatherLocationNotFound = errors.New("location not found")
-)
-
 // 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) {

pkg/common/random.go

@@ -0,0 +1,35 @@
+package common
+
+import (
+	"fmt"
+	"math/rand"
+	"strconv"
+)
+
+// StrGenerateRandomNumber generates a random number from
+// a given max value as a string
+func StrGenerateRandomNumber(max string) int {
+	num, err := strconv.Atoi(max)
+	if num < 1 {
+		return 0
+	}
+
+	if err != nil {
+		fmt.Printf("Supplied value %v is not a number", num)
+		return 0
+	} else {
+		return rand.Intn(num)
+	}
+}
+
+// GenerateRandomNumber returns a random number from
+// a given max value as a int
+func GenerateRandomNumber(max int) int {
+	return rand.Intn(max)
+}
+
+// GenerateRandomNumberRange returns a random number
+// over a given minimum and maximum range.
+func GenerateRandomNumberRange(min int, max int) int {
+	return (rand.Intn(max-min) + min)
+}