Different solution for Gophercise 1

1. Quiz Game Sol2/students/hackeryarn/main.go

@@ -0,0 +1,120 @@
+package main
+
+import (
+	"encoding/csv"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"time"
+
+	quiz "github.com/gophercises/quiz/students/hackeryarn/myquiz"
+	"github.com/gophercises/quiz/students/hackeryarn/problem"
+)
+
+const (
+	// FileFlag is used to set a file for the questions
+	FileFlag = "file"
+	// FileFlagValue is the value used when no FileFlag is provided
+	FileFlagValue = "problems.csv"
+	// FileFlagUsage is the help string for the FileFlag
+	FileFlagUsage = "Questions file"
+
+	// TimerFlag is used for setting a timer for the quiz
+	TimerFlag = "timer"
+	// TimerFlagValue is the value used when no TimerFlag is provided
+	TimerFlagValue = 30
+	// TimerFlagUsage is the help string for the TimerFlag
+	TimerFlagUsage = "Amount of seconds the quiz will allow"
+)
+
+// Flagger configures the flags used
+type Flagger interface {
+	StringVar(p *string, name, value, usage string)
+	IntVar(p *int, name string, value int, usage string)
+}
+
+type quizFlagger struct{}
+
+func (q *quizFlagger) StringVar(p *string, name, value, usage string) {
+	flag.StringVar(p, name, value, usage)
+}
+
+func (q *quizFlagger) IntVar(p *int, name string, value int, usage string) {
+	flag.IntVar(p, name, value, usage)
+}
+
+// Timer is used to start a timer
+type Timer interface {
+	NewTimer(d time.Duration) *time.Timer
+}
+
+type quizTimer struct{}
+
+func (q quizTimer) NewTimer(d time.Duration) *time.Timer {
+	return time.NewTimer(d)
+}
+
+// ReadCSV parses the CSV file into a Problem struct
+func ReadCSV(reader io.Reader) quiz.Quiz {
+	csvReader := csv.NewReader(reader)
+
+	problems := []problem.Problem{}
+	for {
+		record, err := csvReader.Read()
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			log.Fatalln("Error reading CSV:", err)
+		}
+
+		problems = append(problems, problem.New(record))
+	}
+
+	return quiz.New(problems)
+}
+
+// TimerSeconds is the amount of time allowed for the quiz
+var TimerSeconds int
+var file string
+
+// ConfigFlags sets all the flags used by the application
+func ConfigFlags(f Flagger) {
+	f.StringVar(&file, FileFlag, FileFlagValue, FileFlagUsage)
+	f.IntVar(&TimerSeconds, TimerFlag, TimerFlagValue, TimerFlagUsage)
+}
+
+// StartTimer begins a timer once the user provides input
+func StartTimer(w io.Writer, r io.Reader, timer Timer) *time.Timer {
+	fmt.Fprint(w, "Ready to start?")
+	fmt.Fscanln(r)
+
+	return timer.NewTimer(time.Second * time.Duration(TimerSeconds))
+}
+
+func init() {
+	flagger := &quizFlagger{}
+	ConfigFlags(flagger)
+
+	flag.Parse()
+}
+
+func main() {
+	file, err := os.Open(file)
+	if err != nil {
+		log.Fatalln("Could not open file", err)
+	}
+
+	quiz := ReadCSV(file)
+
+	timer := StartTimer(os.Stdout, os.Stdin, quizTimer{})
+	go func() {
+		<-timer.C
+		fmt.Println("")
+		quiz.PrintResults(os.Stdout)
+		os.Exit(0)
+	}()
+
+	quiz.Run(os.Stdout, os.Stdin)
+}