Add ID field to User struct (#40)

Also make sure it's filled in the appropriate places. This allows you to add
some granularity to whom can run certain commands.

Fixes #39

cmd.go

@@ -31,8 +31,9 @@ type PeriodicConfig struct {
 	CmdFunc  func(channel string) (string, error) // func to be executed at the period specified on CronSpec
 }
 
-// User holds user id (nick) and real name
+// User holds user id, nick and real name
 type User struct {
+	ID       string
 	Nick     string
 	RealName string
 }

irc/irc.go

@@ -37,7 +37,10 @@ func responseHandler(target string, message string, sender *bot.User) {
 }
 
 func onPRIVMSG(e *ircevent.Event) {
-	b.MessageReceived(e.Arguments[0], e.Message(), &bot.User{Nick: e.Nick})
+	b.MessageReceived(e.Arguments[0], e.Message(), &bot.User{
+		ID:       e.Host,
+		Nick:     e.Nick,
+		RealName: e.User})
 }
 
 func getServerName(server string) string {

slack/slack.go

@@ -27,7 +27,10 @@ func extractUser(userID string) *bot.User {
 		fmt.Printf("Error retrieving slack user: %s\n", err)
 		return &bot.User{Nick: userID}
 	}
-	return &bot.User{Nick: slackUser.Name, RealName: slackUser.Profile.RealName}
+	return &bot.User{
+		ID:       userID,
+		Nick:     slackUser.Name,
+		RealName: slackUser.Profile.RealName}
 }
 
 func readBotInfo(api *slack.Client) {

telegram/telegram.go

@@ -4,6 +4,7 @@ package telegram
 import (
 	"log"
 	"strconv"
+	"strings"
 
 	"github.com/go-chat-bot/bot"
 	"gopkg.in/telegram-bot-api.v3"
@@ -52,7 +53,11 @@ func Run(token string, debug bool) {
 
 	for update := range updates {
 		target := strconv.FormatInt(update.Message.Chat.ID, 10)
-		sender := strconv.Itoa(update.Message.From.ID)
-		b.MessageReceived(target, update.Message.Text, &bot.User{Nick: sender})
+		name := []string{update.Message.From.FirstName, update.Message.From.LastName}
+
+		b.MessageReceived(target, update.Message.Text, &bot.User{
+			ID:       strconv.Itoa(update.Message.From.ID),
+			Nick:     update.Message.From.UserName,
+			RealName: strings.Join(name, " ")})
 	}
 }