added: list quiz from db & intial ui for quiz

cmd/quiz/start.go

@@ -1,29 +1,45 @@
 package quiz
 
 import (
+	"fmt"
+
 	"github.com/spf13/cobra"
+	"github.com/vaibhav135/go-quiz-app/pkg/quiz/database"
 	"github.com/vaibhav135/go-quiz-app/pkg/quiz/gui"
 )
 
 var startCmd = &cobra.Command{
 	Use:   "start",
 	Short: "Start the quiz and check your skillz...",
 	Args: func(cmd *cobra.Command, args []string) error {
-
 		return nil
 	},
 	RunE: func(cmd *cobra.Command, args []string) error {
-		gui.Timer(3)
+		if timerDuration < 1 {
+			return fmt.Errorf("\n Timer duration cannot be less than 1 minute \n")
+		}
+
+		if totalQuestions < 5 {
+			return fmt.Errorf("\n Total questions can't be less than 5 \n")
+		}
+
+		// database.
+		quizContent := database.QuizInstance.List(totalQuestions)
+
+		// Since timeDuration is in seconds we are converting it to minutes.
+		timerDurationInMinutes := timerDuration * 60
+		gui.QuizGUI(timerDurationInMinutes, quizContent)
 
+		fmt.Println(quizContent)
 		return nil
 	},
 }
 
-var timer int
+var timerDuration, totalQuestions int
 
 func init() {
-	startCmd.Flags().IntVarP(&timer, "timer", "t", 1, "Timer for the quiz (time is in mins)")
-	startCmd.Flags().IntVarP(&timer, "totalQuestions", "q", 10, "Total no. of questions you want to have in the quiz")
+	startCmd.Flags().IntVarP(&timerDuration, "timer", "t", 1, "Timer for the quiz (time is in mins)")
+	startCmd.Flags().IntVarP(&totalQuestions, "totalQuestions", "q", 10, "Total no. of questions you want to have in the quiz")
 
 	rootCmd.AddCommand(startCmd)
 }

pkg/quiz/constants.go

@@ -1,11 +1,11 @@
 package quiz
 
 const (
-  Json = "json"
-  Csv  = "csv"  
+	Json = "json"
+	Csv  = "csv"
 )
 
 type QuizContent struct {
-  Question string `json:"question"`
-  Answer string `json:"answer"`
+	Question string `json:"question"`
+	Answer   string `json:"answer"`
 }

pkg/quiz/database/db.go

@@ -8,7 +8,7 @@ import (
 	"sync"
 
 	_ "github.com/mattn/go-sqlite3"
-	"github.com/vaibhav135/go-quiz-app/pkg/quiz"
+	TQuiz "github.com/vaibhav135/go-quiz-app/pkg/quiz"
 )
 
 type Quiz struct {
@@ -73,10 +73,30 @@ func create() (*sql.DB, error) {
 
 }
 
-func (quiz *Quiz) List(numberOfQuiz int) {
+func (quiz *Quiz) List(numberOfQuiz int) []TQuiz.QuizContent {
+	rows, err := quiz.DB.Query(quizListQuery, numberOfQuiz)
+
+	if err != nil {
+		log.Panic(err)
+	}
+
+	var quizContent = []TQuiz.QuizContent{}
+
+	for rows.Next() {
+		var (
+			Question string
+			Answer   string
+		)
+		if err := rows.Scan(&Question, &Answer); err != nil {
+			log.Fatal(err)
+		}
+		quizContent = append(quizContent, TQuiz.QuizContent{Question: Question, Answer: Answer})
+	}
+
+	return quizContent
 }
 
-func (quiz *Quiz) BulkInsert(quizData []quiz.QuizContent) {
+func (quiz *Quiz) BulkInsert(quizData []TQuiz.QuizContent) {
 	stmt, err := quiz.DB.Prepare(quizInsertQuery)
 
 	if err != nil {

pkg/quiz/database/query.go

@@ -1,10 +1,11 @@
 package database
 
-
 var dbSeedQuery = `CREATE TABLE IF NOT EXISTS quiz (
                     id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, 
                     question TEXT UNIQUE NOT NULL, 
                     answer VARCHAR(100) NOT NULL
-                  )` 
+                  )`
 
 var quizInsertQuery = `INSERT INTO quiz(question, answer) VALUES(?, ?)`
+
+var quizListQuery = `SELECT question, answer FROM quiz ORDER BY RANDOM() LIMIT ?`

pkg/quiz/gui/quiz_gui.go

@@ -0,0 +1,40 @@
+package gui
+
+import (
+	"github.com/rivo/tview"
+	"github.com/vaibhav135/go-quiz-app/pkg/quiz"
+)
+
+// Ref: https://github.com/rivo/tview/wiki/Grid
+func QuizGUI(duration int, quizContent []quiz.QuizContent) {
+	app = tview.NewApplication()
+
+	newPrimitive := func(text string) tview.Primitive {
+		return tview.NewTextView().
+			SetTextAlign(tview.AlignCenter).
+			SetText(text)
+	}
+
+	timerPrimitive := func() tview.Primitive {
+		return timer(duration)
+	}
+
+	header := timerPrimitive()
+	main := newPrimitive("")
+	footer := newPrimitive("")
+
+	grid := tview.NewGrid().
+		SetRows(6, 0, 5).
+		SetBorders(true)
+
+	// Layout for screens narrower than 100 cells (menu and side bar are hidden).
+	grid.AddItem(header, 0, 0, 1, 3, 0, 0, false).
+		AddItem(main, 1, 0, 1, 3, 0, 0, false).
+		AddItem(footer, 2, 0, 1, 3, 0, 0, false)
+
+	app.SetRoot(grid, true).SetFocus(grid)
+
+	if err := app.Run(); err != nil {
+		panic(err)
+	}
+}

pkg/quiz/gui/timer.go

@@ -48,14 +48,12 @@ func refresh() {
 	}
 }
 
-func Timer(durationArg int) {
+func timer(durationArg int) tview.Primitive {
 	duration = durationArg
 
-	app = tview.NewApplication()
 	view = tview.NewBox().SetDrawFunc(drawTime)
 
 	go refresh()
-	if err := app.SetRoot(view, true).Run(); err != nil {
-		panic(err)
-	}
+
+	return view
 }