feat: raising hand endpoint

rooms/room.go

@@ -30,6 +30,22 @@ func (r *Room)InitMaps() {
 	}
 }
 
+// if you have no hand raised - select any hand
+// if you are not speaking and have a hand raise - just exchange
+// if you are speaking - change nothing
+// if nobody is speaking, set this person as a first speaker
+func (r *Room) RaiseHand(p PersonId, gesture HandGesture) Room {
+	if (r.CurrentSpeaker == p) {
+		// if person already speaking, should first end speaking
+		return *r
+	}
+	r.ParticipantHands[p] = gesture
+	if r.CurrentSpeaker == PersonId(0) {
+		r.CurrentSpeaker = p
+	}
+	return *r
+}
+
 // and how would i organize?
 // i should have map[HandGesture]ParticipantId as mark. for 'from where to go clockwise if returning a level lover'
 // now i want methods that for some person raise some hand, so i guess it adds what? to map[ParticipantId]HandGesture
@@ -161,6 +177,13 @@ const (
 	Meta
 )
 
+func GestureFromInt(num int) (HandGesture, bool) {
+	if (num >= int(ChangeTopic) && num <= int(Meta)) {
+		return HandGesture(num), true
+	}
+	return HandGesture(0), false
+}
+
 // String() method to print the name of the days
 func (g HandGesture) String() string {
 	return [...]string{"Change Topic", "Probing Quesion", "Expand", "Clarifying Quesion", "Meta"}[g]

rooms/rooms_manager.go

@@ -13,6 +13,16 @@ import (
 
 type PersonId int
 
+func (p PersonId) MarshalBinary() ([]byte, error) {
+	bytes, err := json.Marshal(p)
+    return bytes, err
+}
+
+func (p *PersonId) UnmarshalBinary(data []byte) error {
+	err := json.Unmarshal(data, p)
+    return err
+}
+
 // TODO move to rooms i guess
 func RandomPersonId() PersonId {
 	randInt := rand.Int()
@@ -81,6 +91,7 @@ func (redisRM RedisRM) Update(ctx context.Context, roomName string, f func(fromR
 			return err
 		}
 
+		savedRoom.InitMaps()
 		room := f(savedRoom)
 
 		_, err = tx.Pipelined(ctx, func(pipe redis.Pipeliner) error {