last answer returns ID and is actually the last by TS

main.go

@@ -16,7 +16,7 @@ type (
 		HistoryOf(string) map[string][]History
 		Next(string, string) time.Time
 		Question(string) Question
-		LastAnswer(string, string) Answer
+		LastAnswer(string, string) (string, Answer)
 		Answer(string) Answer
 		PushAnswer(string, string, string, bool) error
 	}
@@ -76,14 +76,22 @@ func Main() error {
 		if len(question.Clues) == 0 || response == "/clue" {
 			response = readline()
 		}
-		if lastAnswer := db.Answer(db.LastAnswer(user, q).A); lastAnswer.A != "" {
+		if id, _ := db.LastAnswer(user, q); id == "" {
+		} else if lastAnswer := db.Answer(id); lastAnswer.A != "" {
 			fmt.Printf("> Last time, you responded:\n\t%s\n", lastAnswer.A)
 		}
-		fmt.Printf("> Did you pass this time? [Yn] ")
+		fmt.Printf("> Did you pass this time? [Yns]\n")
-		pass := readline() == "n"
+		switch readline() {
-		if err := db.PushAnswer(user, q, response, pass); err != nil {
+		case "s":
+		case "n":
+			if err := db.PushAnswer(user, q, response, false); err != nil {
 				return err
 			}
+		default:
+			if err := db.PushAnswer(user, q, response, true); err != nil {
+				return err
+			}
+		}
 		fmt.Println()
 	}
 	if b, _ := yaml.Marshal(db); len(b) > 0 {

testdata/sample.yaml

@@ -14,10 +14,16 @@ knowledge:
       a: a schema
       ts: 123
       author: breel
+    uuid0:
+      q: uuid1
+      a: not a schema
+      ts: 122
+      author: breel
 users:
   breel:
     history:
       uuid1:
+      - {a: uuid0, pass: true}
       - {a: uuid2, pass: true}
 cadence:
 - 1d

yamldb.go

@@ -47,13 +47,18 @@ func (db yamlDB) Question(q string) Question {
 	return db.Knowledge.Questions[q]
 }
 
-func (db yamlDB) LastAnswer(user, q string) Answer {
+func (db yamlDB) LastAnswer(user, q string) (string, Answer) {
-	for _, v := range db.Knowledge.Answers {
+	maxk := ""
+	var maxv Answer
+	for k, v := range db.Knowledge.Answers {
 		if v.Q == q && v.Author == user {
-			return v
+			if maxv.TS < v.TS {
+				maxk = k
+				maxv = v
 			}
 		}
-	return Answer{}
+	}
+	return maxk, maxv
 }
 
 func (db yamlDB) Answer(a string) Answer {