A few gaming features added, e.g. rolling dice, flipping coin, eightball.

rtpconn/coin.go

@@ -0,0 +1,50 @@
+package rtpconn
+
+import (
+	"crypto/rand"
+	"fmt"
+	"io"
+	"math/big"
+	"strings"
+
+	"git.stormux.org/storm/skald/hall"
+)
+
+var coinSides = []string{"heads", "tails"}
+
+func chooseCoinSide(reader io.Reader) (string, error) {
+	index, err := rand.Int(reader, big.NewInt(int64(len(coinSides))))
+	if err != nil {
+		return "", err
+	}
+	return coinSides[index.Int64()], nil
+}
+
+func validateCoinRequest(value any) error {
+	if value == nil {
+		return nil
+	}
+	arguments, ok := value.(string)
+	if !ok || strings.TrimSpace(arguments) != "" {
+		return hall.UserError("/coin does not take any arguments")
+	}
+	return nil
+}
+
+func handleCoinFlip(c *webClient, g *hall.Hall, value any) error {
+	if !member("message", c.Permissions()) {
+		return c.error(hall.UserError("not authorised"))
+	}
+	if err := validateCoinRequest(value); err != nil {
+		return c.error(err)
+	}
+	side, err := chooseCoinSide(rand.Reader)
+	if err != nil {
+		return c.error(err)
+	}
+	announcement := fmt.Sprintf("%s flips a coin: %s.", c.Username(), side)
+	if err := broadcastServerChat(g, "Coin", "coin", announcement); err != nil {
+		return c.error(err)
+	}
+	return nil
+}