go: discord/backend: Implement actual trust vote caching

GoBot/discord/backend/trust.go

@@ -14,6 +14,30 @@ var trustCache map[string]float64
 var ErrNotMember = errors.New("trust: only members have trust value")
 
 func GetTrust(s *discordgo.Session, discordID string) (float64, error) {
+	rawScore, err := GetRawTrust(s, discordID)
+	if err != nil {
+		return 0.0, err
+	}
+
+	//Calculate active level
+	totalLevel, err := db.GetTotalActiveLevel()
+	if err != nil {
+		return rawScore, nil
+	}
+	if totalLevel < 1000000 {
+		return rawScore, nil
+	}
+	activeLevel, err := db.GetActiveLevel(discordID)
+	if err != nil && err != db.ErrNotFound {
+		//ErrNotFound is allowed. It just means the player hasn't played yet.
+		return 0.0, err
+	}
+	activeBuff := float64(activeLevel) / float64(totalLevel)
+
+	return rawScore * (1 + activeBuff), nil
+}
+
+func GetRawTrust(s *discordgo.Session, discordID string) (float64, error) {
 	if v, ok := trustCache[discordID]; ok {
 		return v, nil
 	}
@@ -41,24 +65,10 @@ func GetTrust(s *discordgo.Session, discordID string) (float64, error) {
 	for _, v := range votes {
 		total += float64(v)
 	}
-	voteResult := total / float64(len(votes))
-
-	//Calculate active level
-	totalLevel, err := db.GetTotalActiveLevel()
-	if err != nil {
-		return voteResult, nil
-	}
-	if totalLevel < 1000000 {
-		return voteResult, nil
-	}
-	activeLevel, err := db.GetActiveLevel(discordID)
-	if err != nil && err != db.ErrNotFound {
-		//ErrNotFound is allowed. It just means the player hasn't played yet.
-		return 0.0, err
-	}
-	activeBuff := float64(activeLevel) / float64(totalLevel)
 
-	return voteResult * (1 + activeBuff), nil
+	rawScore := total / float64(len(votes))
+	trustCache[discordID] = rawScore
+	return rawScore, nil
 }
 
 func GetTotalTrust(s *discordgo.Session) (float64, error) {