picker: add new plugin

main.go

@@ -19,6 +19,7 @@ import (
 	"github.com/velour/catbase/plugins/first"
 	"github.com/velour/catbase/plugins/inventory"
 	"github.com/velour/catbase/plugins/leftpad"
+	"github.com/velour/catbase/plugins/picker"
 	"github.com/velour/catbase/plugins/reaction"
 	"github.com/velour/catbase/plugins/reminder"
 	"github.com/velour/catbase/plugins/rpgORdie"
@@ -60,6 +61,7 @@ func main() {
 	// b.AddHandler("downtime", downtime.New(b))
 	b.AddHandler("talker", talker.New(b))
 	b.AddHandler("dice", dice.New(b))
+	b.AddHandler("picker", picker.New(b))
 	b.AddHandler("beers", beers.New(b))
 	b.AddHandler("remember", fact.NewRemember(b))
 	b.AddHandler("your", your.New(b))

plugins/picker/picker.go

@@ -0,0 +1,78 @@
+// © 2013 the CatBase Authors under the WTFPL. See AUTHORS for the list of authors.
+
+package picker
+
+import (
+	"strings"
+	"time"
+
+	"fmt"
+	"math/rand"
+
+	"github.com/velour/catbase/bot"
+	"github.com/velour/catbase/bot/msg"
+)
+
+type PickerPlugin struct {
+	Bot bot.Bot
+}
+
+// NewPickerPlugin creates a new PickerPlugin with the Plugin interface
+func New(bot bot.Bot) *PickerPlugin {
+	rand.Seed(time.Now().Unix())
+
+	return &PickerPlugin{
+		Bot: bot,
+	}
+}
+
+func rollDie(sides int) int {
+	return rand.Intn(sides) + 1
+}
+
+// Message responds to the bot hook on recieving messages.
+// This function returns true if the plugin responds in a meaningful way to the users message.
+// Otherwise, the function returns false and the bot continues execution of other plugins.
+func (p *PickerPlugin) Message(message msg.Message) bool {
+	if !message.Command {
+		return false
+	}
+
+	body := message.Body
+	pfx, sfx := "pick {", "}"
+
+	if strings.HasPrefix(body, pfx) && strings.HasSuffix(body, sfx) {
+		body = strings.TrimSuffix(strings.TrimPrefix(body, pfx), sfx)
+		items := strings.Split(body, ",")
+		item := items[rand.Intn(len(items))]
+
+		out := fmt.Sprintf("I've chosen \"%s\" for you.", item)
+
+		p.Bot.SendMessage(message.Channel, out)
+
+		return true
+	}
+	return false
+}
+
+// Help responds to help requests. Every plugin must implement a help function.
+func (p *PickerPlugin) Help(channel string, parts []string) {
+	p.Bot.SendMessage(channel, "Choose from a list of options. Try \"pick {a,b,c}\".")
+}
+
+// Empty event handler because this plugin does not do anything on event recv
+func (p *PickerPlugin) Event(kind string, message msg.Message) bool {
+	return false
+}
+
+// Handler for bot's own messages
+func (p *PickerPlugin) BotMessage(message msg.Message) bool {
+	return false
+}
+
+// Register any web URLs desired
+func (p *PickerPlugin) RegisterWeb() *string {
+	return nil
+}
+
+func (p *PickerPlugin) ReplyMessage(message msg.Message, identifier string) bool { return false }