review failed until success but only persist first attempt

main.go

@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"bytes"
 	"fmt"
-	"log"
 	"os"
 	"strings"
 	"time"
@@ -56,7 +55,15 @@ func Main() error {
 	if err != nil {
 		return err
 	}
-	log.Printf("failed %v", failed)
+	for len(failed) > 0 {
+		for i := len(failed) - 1; i >= 0; i-- {
+			if _, passed, err := ReviewQ(db, user, failed[i]); err != nil {
+				return err
+			} else if passed != "n" {
+				failed = append(failed[:i], failed[i+1:]...)
+			}
+		}
+	}
 	return nil
 }
 
@@ -67,6 +74,27 @@ func Review(db DB, user IDU) ([]IDQ, error) {
 		if time.Until(db.Next(user, q)) > 0 {
 			continue
 		}
+		response, passed, err := ReviewQ(db, user, q)
+		if err != nil {
+			return nil, err
+		}
+		switch passed {
+		case "n":
+			failed = append(failed, q)
+			if err := db.PushAnswer(user, q, Renderable(response), false); err != nil {
+				return nil, err
+			}
+		case "y":
+			if err := db.PushAnswer(user, q, Renderable(response), true); err != nil {
+				return nil, err
+			}
+		}
+		fmt.Println()
+	}
+	return failed, nil
+}
+
+func ReviewQ(db DB, user IDU, q IDQ) (string, string, error) {
 	question := db.Question(q)
 	fmt.Printf("> Q: %s\n", question.Q)
 	fmt.Printf("\n")
@@ -94,22 +122,13 @@ func Review(db DB, user IDU) ([]IDQ, error) {
 		fmt.Printf("> Last time, you responded:\n\t%s\n", lastAnswer.A)
 	}
 	fmt.Printf("> Did you pass this time? [Yns]\n")
-		passed := readline()
-		switch passed {
+	switch readline() {
 	case "s":
+		return response, "s", nil
 	case "n":
-			failed = append(failed, q)
-			if err := db.PushAnswer(user, q, Renderable(response), false); err != nil {
-				return nil, err
+		return response, "n", nil
 	}
-		default:
-			if err := db.PushAnswer(user, q, Renderable(response), true); err != nil {
-				return nil, err
-			}
-		}
-		fmt.Println()
-	}
-	return failed, nil
+	return response, "y", nil
 }
 
 func readline() string {