Added first redis support

Signed-off-by: Ettore Dreucci <ettore.dreucci@gmail.com>

redisAPI.go

@@ -1,11 +1,20 @@
 package main
 
 import (
+	"bufio"
+	"fmt"
 	"log"
+	"os"
+	"regexp"
+	"strings"
 
 	"github.com/go-redis/redis"
 )
 
+const (
+	tkSet = "botTokens"
+)
+
 func redisInit(addr string, pwd string, db int) (*redis.Client, error) {
 	redisClient := redis.NewClient(&redis.Options{
 		Addr:     addr,
@@ -18,3 +27,47 @@ func redisInit(addr string, pwd string, db int) (*redis.Client, error) {
 	}
 	return redisClient, nil
 }
+
+func addBotTokens(client *redis.Client) {
+	fmt.Println("Add the new tokens, comma-separated:")
+	reader := bufio.NewReader(os.Stdin)
+	line, err := reader.ReadString('\n')
+	if err != nil {
+		log.Panicf("Error in reading new bot tokens: %v", err)
+	}
+	newTokens := strings.Split(line, ",")
+	for i, newToken := range newTokens {
+		newToken = strings.TrimSpace(newToken)
+		matched, err := regexp.MatchString("^\\d+\\:([0-9]|[A-z]|\\_|\\-)+", newToken)
+		if err != nil {
+			log.Printf("Error in parsing new bot token: %v", err)
+			newTokens = append(newTokens[:i], newTokens[i+1:]...)
+		}
+		if !matched {
+			log.Printf("%s is not a valid bot token and has not been added.", newToken)
+			newTokens = append(newTokens[:i], newTokens[i+1:]...)
+		}
+	}
+	err = client.SAdd(tkSet, newTokens).Err()
+	if err != nil {
+
+	}
+}
+
+func getBotTokens(client *redis.Client) ([]string, error) {
+	tkNum, err := client.SCard(tkSet).Result()
+	if err != nil {
+		log.Panicf("Couldn't retrive number of bot tokens: %v", err)
+	}
+	if tkNum == 0 {
+		fmt.Println("No bot token found.")
+		addBotTokens(client)
+	}
+
+	tokens, err := client.SMembers(tkSet).Result()
+	if err != nil {
+
+	}
+
+	return tokens, nil
+}