Converted to a Go app

go.mod

@@ -0,0 +1,22 @@
+module lmika.dev/web/isknow
+
+go 1.24.4
+
+require (
+	github.com/andybalholm/brotli v1.1.0 // indirect
+	github.com/gofiber/fiber/v2 v2.52.8 // indirect
+	github.com/gofiber/template v1.8.3 // indirect
+	github.com/gofiber/template/html/v2 v2.1.3 // indirect
+	github.com/gofiber/utils v1.1.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
+	github.com/valyala/bytebufferpool v1.0.0 // indirect
+	github.com/valyala/fasthttp v1.51.0 // indirect
+	github.com/valyala/tcplisten v1.0.0 // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	lmika.dev/pkg/modash v0.0.0-20250619112300-0be0b6b35b1b // indirect
+)

go.sum

@@ -0,0 +1,37 @@
+github.com/andybalholm/brotli v1.1.0 h1:eLKJA0d02Lf0mVpIDgYnqXcUn0GqVmEFny3VuID1U3M=
+github.com/andybalholm/brotli v1.1.0/go.mod h1:sms7XGricyQI9K10gOSf56VKKWS4oLer58Q+mhRPtnY=
+github.com/gofiber/fiber/v2 v2.52.8 h1:xl4jJQ0BV5EJTA2aWiKw/VddRpHrKeZLF0QPUxqn0x4=
+github.com/gofiber/fiber/v2 v2.52.8/go.mod h1:YEcBbO/FB+5M1IZNBP9FO3J9281zgPAreiI1oqg8nDw=
+github.com/gofiber/template v1.8.3 h1:hzHdvMwMo/T2kouz2pPCA0zGiLCeMnoGsQZBTSYgZxc=
+github.com/gofiber/template v1.8.3/go.mod h1:bs/2n0pSNPOkRa5VJ8zTIvedcI/lEYxzV3+YPXdBvq8=
+github.com/gofiber/template/html/v2 v2.1.3 h1:n1LYBtmr9C0V/k/3qBblXyMxV5B0o/gpb6dFLp8ea+o=
+github.com/gofiber/template/html/v2 v2.1.3/go.mod h1:U5Fxgc5KpyujU9OqKzy6Kn6Qup6Tm7zdsISR+VpnHRE=
+github.com/gofiber/utils v1.1.0 h1:vdEBpn7AzIUJRhe+CiTOJdUcTg4Q9RK+pEa0KPbLdrM=
+github.com/gofiber/utils v1.1.0/go.mod h1:poZpsnhBykfnY1Mc0KeEa6mSHrS3dV0+oBWyeQmb2e0=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
+github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
+github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
+github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
+github.com/valyala/fasthttp v1.51.0 h1:8b30A5JlZ6C7AS81RsWjYMQmrZG6feChmgAolCl1SqA=
+github.com/valyala/fasthttp v1.51.0/go.mod h1:oI2XroL+lI7vdXyYoQk03bXBThfFl2cVdIA3Xl7cH8g=
+github.com/valyala/tcplisten v1.0.0 h1:rBHj/Xf+E1tRGZyWIWwJDiRY0zc1Js+CV5DqwacVSA8=
+github.com/valyala/tcplisten v1.0.0/go.mod h1:T0xQ8SeCZGxckz9qRXTfG43PvQ/mcWh7FwZEA7Ioqkc=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
+golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+lmika.dev/pkg/modash v0.0.0-20250216001243-c73e50a0913d h1:x5aMBOkCr4cjJyFmq+qJVUsByfffD9k56HYDx1yZSR4=
+lmika.dev/pkg/modash v0.0.0-20250216001243-c73e50a0913d/go.mod h1:8NDl/yR1eCCEhip9FJlVuMNXIeaztQ0Ks/tizExFcTI=
+lmika.dev/pkg/modash v0.0.0-20250619112300-0be0b6b35b1b h1:Oymcj66pgyJ2CtGk9lPh06P4FOekllE1iPehDwaL0vw=
+lmika.dev/pkg/modash v0.0.0-20250619112300-0be0b6b35b1b/go.mod h1:8NDl/yR1eCCEhip9FJlVuMNXIeaztQ0Ks/tizExFcTI=

main.go

@@ -0,0 +1,88 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/gofiber/fiber/v2"
+	"github.com/gofiber/template/html/v2"
+	"lmika.dev/web/isknow/models"
+)
+
+func main() {
+	questions := models.QuestionSet{
+		Questions: []models.Question{
+			{
+				Text: "What is 1 + 1?",
+				Choices: []models.Choice{
+					{Text: "1"},
+					{Text: "2", IsRight: true},
+					{Text: "3"},
+					{Text: "4"},
+				},
+				Fact: "1 + 1 = 2",
+			},
+			{
+				Text: "What is 3 * 5?",
+				Choices: []models.Choice{
+					{Text: "5"},
+					{Text: "10"},
+					{Text: "15", IsRight: true},
+					{Text: "20"},
+				},
+				Fact: "I can't use the iPad for coding this",
+			},
+		},
+	}
+
+	prefix, _ := os.LookupEnv("PATH_PREFIX")
+
+	engine := html.New("./views", ".html")
+	engine.AddFunc("prefix", func() string { return prefix })
+
+	app := fiber.New(fiber.Config{
+		Views:       engine,
+		ViewsLayout: "layout",
+	})
+
+	app.Get("/", func(c *fiber.Ctx) error {
+		return c.Render("index", fiber.Map{})
+	})
+	app.Get("/end", func(c *fiber.Ctx) error {
+		return c.Render("end", fiber.Map{})
+	})
+	app.Get("/:qid", func(c *fiber.Ctx) error {
+		qID, err := c.ParamsInt("qid")
+		if err != nil {
+			return c.SendStatus(http.StatusBadRequest)
+		}
+
+		idx := qID - 1
+		if idx < 0 || idx >= len(questions.Questions) {
+			return c.SendStatus(http.StatusBadRequest)
+		}
+
+		rq, err := questions.Questions[idx].Render()
+		if err != nil {
+			return err
+		}
+
+		nextURL := prefix + "/end"
+		reachedEnd := true
+		if idx+1 < len(questions.Questions) {
+			nextURL = fmt.Sprintf("%v/%d", prefix, idx+2)
+			reachedEnd = true
+		}
+
+		return c.Render("question", fiber.Map{
+			"q":          rq,
+			"nextURL":    nextURL,
+			"reachedEnd": reachedEnd,
+		})
+	})
+	app.Static("/assets", "./public")
+
+	log.Fatal(app.Listen(":3000"))
+}

models/question.go

@@ -0,0 +1,58 @@
+package models
+
+import (
+	"errors"
+	"math/rand"
+
+	"lmika.dev/pkg/modash/moslice"
+)
+
+type QuestionSet struct {
+	Questions []Question
+}
+
+type Choice struct {
+	Text    string
+	IsRight bool
+}
+
+type Question struct {
+	Text    string
+	Choices []Choice
+	Fact    string
+}
+
+func (q Question) Render() (RenderedQuestion, error) {
+	choices := moslice.MapIndex(q.Choices, func(c Choice, i int) RenderedChoice {
+		return RenderedChoice{
+			ID:   i + 1,
+			Text: c.Text,
+		}
+	})
+	rand.Shuffle(len(choices), func(i, j int) {
+		choices[i], choices[j] = choices[j], choices[i]
+	})
+	_, idx, ok := moslice.FindWithIndexWhere(q.Choices, func(c Choice) bool { return c.IsRight })
+	if !ok {
+		return RenderedQuestion{}, errors.New("question does not have a right answer")
+	}
+
+	return RenderedQuestion{
+		Question:    q.Text,
+		Fact:        q.Fact,
+		Choices:     choices,
+		RightChoice: idx + 1,
+	}, nil
+}
+
+type RenderedChoice struct {
+	ID   int
+	Text string
+}
+
+type RenderedQuestion struct {
+	Question    string
+	Fact        string
+	Choices     []RenderedChoice
+	RightChoice int
+}

public/scripts/controllers/picker.js

@@ -1,7 +1,7 @@
 import { Controller } from "https://unpkg.com/@hotwired/stimulus/dist/stimulus.js";
 
 export default class extends Controller {
-    static targets = [ "radio" ];
+    static targets = ["radio", "answerDetails"];
 
     static values = {
         answer: String
@@ -25,5 +25,7 @@ export default class extends Controller {
                 }
             });
         }, 1);
+
+        this.answerDetailsTarget.classList.remove("hidden");
     }
 };

public/style.css

@@ -79,3 +79,44 @@ input[type=radio] {
     margin: 0;
     margin-inline-start: -1px;
 }
+
+.hidden {
+  display: none !important;
+}
+
+/**
+ * Page transition
+ */
+@view-transition {
+  navigation: auto;
+}
+
+ 
+@keyframes move-out {
+  from {
+    transform: translateX(0%);
+  }
+
+  to {
+    transform: translateX(-100%);
+  }
+}
+
+@keyframes move-in {
+  from {
+    transform: translateX(100%);
+  }
+
+  to {
+    transform: translateX(0%);
+  }
+}
+
+/* Apply the custom animation to the old and new page states */
+::view-transition-old(root) {
+  animation: 0.3s ease-in both move-out;
+}
+
+::view-transition-new(root) {
+  animation: 0.3s ease-in both move-in;
+}

views/end.html

@@ -0,0 +1,3 @@
+<h1>Well Done</h1>
+
+<p>You reached the end</p>

views/index.html

@@ -0,0 +1,5 @@
+<h1>Welcome</h1>
+
+<p>Welcome to the quiz</p>
+
+<a href="{{prefix}}/1">Lets go</a>

views/layout.html

@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="stylesheet" href="https://cdn.simplecss.org/simple.min.css">
+    <link rel="stylesheet" href="{{prefix}}/assets/style.css">
+    <link rel="stylesheet" href="{{prefix}}/assets/fontello/css/fontello.css">
+</head>
+<body>
+    {{embed}}
+</body>
+</html>
+    

views/question.html

@@ -0,0 +1,31 @@
+<div class="offscreen">
+    <i class="icon-cancel"></i>
+    <i class="icon-ok"></i>
+</div>
+    
+<div class="question" data-controller="picker" data-picker-answer-value="{{.q.RightChoice}}">
+    <p>{{.q.Question}}</p>
+
+    {{range .q.Choices}}
+    <label>
+        <input type="radio" name="ans" value="{{.ID}}" data-picker-target="radio">
+        {{if eq .ID $.q.RightChoice}}
+            <i class="icon-ok"></i>
+        {{else}}
+            <i class="icon-cancel"></i>
+        {{end}}
+        {{.Text}}
+    </label>
+    {{end}}
+
+    <button data-action="picker#submitAnswer">Submit</button>
+
+    <div data-picker-target="answerDetails" class="hidden">
+        <p>{{.q.Fact}}</p>
+        <div>
+            <a href="{{.nextURL}}">Next</a>
+        </div>
+    </div>
+</div>
+
+<script src="{{prefix}}/assets/scripts/main.js" type="module"></script>