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

rtpconn/eightball.go

@@ -0,0 +1,85 @@
+package rtpconn
+
+import (
+	"crypto/rand"
+	"fmt"
+	"io"
+	"math/big"
+	"strings"
+	"unicode/utf8"
+
+	"git.stormux.org/storm/skald/hall"
+)
+
+const maxEightBallQuestionRunes = 500
+
+var eightBallResponses = []string{
+	"It is certain.",
+	"It is decidedly so.",
+	"Without a doubt.",
+	"Yes, definitely.",
+	"You may rely on it.",
+	"As I see it, yes.",
+	"Most likely.",
+	"Outlook good.",
+	"Yes.",
+	"Signs point to yes.",
+	"Reply hazy, try again.",
+	"Ask again later.",
+	"Better not tell you now.",
+	"Cannot predict now.",
+	"Concentrate and ask again.",
+	"Don't count on it.",
+	"My reply is no.",
+	"My sources say no.",
+	"Outlook not so good.",
+	"Very doubtful.",
+}
+
+func normalizeEightBallQuestion(value any) (string, error) {
+	question, ok := value.(string)
+	if !ok {
+		return "", hall.UserError("/8ball requires a question")
+	}
+	question = strings.Join(strings.Fields(question), " ")
+	if question == "" {
+		return "", hall.UserError("/8ball requires a question")
+	}
+	if utf8.RuneCountInString(question) > maxEightBallQuestionRunes {
+		return "", hall.UserError(fmt.Sprintf(
+			"Eight Ball questions may not exceed %d characters",
+			maxEightBallQuestionRunes,
+		))
+	}
+	return question, nil
+}
+
+func chooseEightBallResponse(reader io.Reader) (string, error) {
+	index, err := rand.Int(reader, big.NewInt(int64(len(eightBallResponses))))
+	if err != nil {
+		return "", err
+	}
+	return eightBallResponses[index.Int64()], nil
+}
+
+func handleEightBall(c *webClient, g *hall.Hall, value any) error {
+	if !member("message", c.Permissions()) {
+		return c.error(hall.UserError("not authorised"))
+	}
+	question, err := normalizeEightBallQuestion(value)
+	if err != nil {
+		return c.error(err)
+	}
+	response, err := chooseEightBallResponse(rand.Reader)
+	if err != nil {
+		return c.error(err)
+	}
+	announcement := fmt.Sprintf(
+		"%s asks: %s\nThe Eight Ball says: %s",
+		c.Username(), question, response,
+	)
+	if err := broadcastServerChat(g, "Eight Ball", "eightball", announcement); err != nil {
+		return c.error(err)
+	}
+	return nil
+}