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
 }
 
@@ -67,42 +74,17 @@ func Review(db DB, user IDU) ([]IDQ, error) {
 		if time.Until(db.Next(user, q)) > 0 {
 			continue
 		}
-		question := db.Question(q)
-		fmt.Printf("> Q: %s\n", question.Q)
-		fmt.Printf("\n")
-		fmt.Printf("> %+v\n", question.Tags)
-		var response string
-		for i := range question.Clues {
-			if i == 0 {
-				fmt.Printf("> /clue for a clue\n")
-			}
-			response = readline()
-			if response != "/clue" {
-				break
-			}
-			fmt.Printf("> %s", question.Clues[i])
-			if i+1 < len(question.Clues) {
-				fmt.Printf(" | /clue for another clue")
-			}
-			fmt.Printf("\n")
+		response, passed, err := ReviewQ(db, user, q)
+		if err != nil {
+			return nil, err
 		}
-		if len(question.Clues) == 0 || response == "/clue" {
-			response = readline()
-		}
-		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? [Yns]\n")
-		passed := readline()
 		switch passed {
-		case "s":
 		case "n":
 			failed = append(failed, q)
 			if err := db.PushAnswer(user, q, Renderable(response), false); err != nil {
 				return nil, err
 			}
-		default:
+		case "y":
 			if err := db.PushAnswer(user, q, Renderable(response), true); err != nil {
 				return nil, err
 			}
@@ -112,6 +94,43 @@ func Review(db DB, user IDU) ([]IDQ, error) {
 	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")
+	fmt.Printf("> %+v\n", question.Tags)
+	var response string
+	for i := range question.Clues {
+		if i == 0 {
+			fmt.Printf("> /clue for a clue\n")
+		}
+		response = readline()
+		if response != "/clue" {
+			break
+		}
+		fmt.Printf("> %s", question.Clues[i])
+		if i+1 < len(question.Clues) {
+			fmt.Printf(" | /clue for another clue")
+		}
+		fmt.Printf("\n")
+	}
+	if len(question.Clues) == 0 || response == "/clue" {
+		response = readline()
+	}
+	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? [Yns]\n")
+	switch readline() {
+	case "s":
+		return response, "s", nil
+	case "n":
+		return response, "n", nil
+	}
+	return response, "y", nil
+}
+
 func readline() string {
 	fmt.Printf("\t")
 	reader := bufio.NewReader(os.Stdin)