feat(examples): Ivan's registry, home realm (gnolang#3354)

Created registry for further development of realms, finalising home
realm.

---------

Co-authored-by: Ivan Ursulovic <[email protected]>
Co-authored-by: Ivan Ursulovic <[email protected]>
Co-authored-by: Morgan <[email protected]>

examples/gno.land/r/ursulovic/home/gno.mod

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+module gno.land/r/ursulovic/home

examples/gno.land/r/ursulovic/home/home.gno

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+package home
+
+import (
+	"std"
+	"strconv"
+	"strings"
+
+	"gno.land/p/demo/ownable"
+	"gno.land/p/moul/md"
+	"gno.land/r/leon/hof"
+
+	"gno.land/r/ursulovic/registry"
+)
+
+var (
+	aboutMe       string
+	selectedImage string
+	Ownable       *ownable.Ownable
+
+	githubUrl        string
+	linkedinUrl      string
+	connectUrl       string
+	imageUpdatePrice int64
+
+	isValidUrl func(string) bool
+)
+
+func init() {
+	Ownable = ownable.NewWithAddress(registry.MainAddress())
+
+	aboutMe = "Hi, I'm Ivan Ursulovic, a computer engineering graduate, blockchain enthusiast, and backend developer specializing in ASP.NET. I love learning new things and taking on challenges."
+	selectedImage = "https://i.ibb.co/W28NPkw/beograd.webp"
+
+	githubUrl = "https://github.com/ursulovic"
+	linkedinUrl = "https://www.linkedin.com/in/ivan-ursulovic-953310190/"
+	imageUpdatePrice = 5000000
+	isValidUrl = defaultURLValidation
+	hof.Register()
+}
+
+func Render(s string) string {
+	var sb strings.Builder
+	sb.WriteString(renderAboutMe())
+	sb.WriteString(renderSelectedImage())
+	sb.WriteString(renderContactsUrl())
+	return sb.String()
+}
+
+func defaultURLValidation(url string) bool {
+	const urlPrefix string = "https://i.ibb.co/"
+
+	if !strings.HasPrefix(url, urlPrefix) {
+		return false
+	}
+
+	if !(strings.HasSuffix(url, ".jpg") ||
+		strings.HasSuffix(url, ".png") ||
+		strings.HasSuffix(url, ".gif") ||
+		strings.HasSuffix(url, ".webp")) {
+		return false
+	}
+
+	urlPath := strings.TrimPrefix(url, "https://i.ibb.co/")
+	parts := strings.Split(urlPath, "/")
+
+	if len(parts) != 2 || len(parts[0]) == 0 || len(parts[1]) == 0 {
+		return false
+	}
+
+	return true
+}
+
+func UpdateSelectedImage(url string) {
+	if !isValidUrl(url) {
+		panic("Url is not valid!")
+	}
+
+	sentCoins := std.GetOrigSend()
+
+	if len(sentCoins) != 1 && sentCoins.AmountOf("ugnot") == imageUpdatePrice {
+		panic("Please send exactly " + strconv.Itoa(int(imageUpdatePrice)) + " ugnot")
+	}
+
+	selectedImage = url
+}
+
+func renderSelectedImage() string {
+	var sb strings.Builder
+
+	sb.WriteString(md.HorizontalRule())
+	sb.WriteString("\n")
+
+	sb.WriteString(md.H2("📸 Featured Image"))
+	sb.WriteString("\n")
+
+	sb.WriteString(md.Image("", selectedImage))
+	sb.WriteString("\n")
+
+	sb.WriteString(md.H4("✨ " + md.Link("Change this image for "+strconv.Itoa(int(imageUpdatePrice/1000000))+" GNOT. To update, set a direct image URL from ImgBB.", "https://gno.studio/connect/view/gno.land/r/ursulovic/home?network=portal-loop") + " ✨"))
+
+	return sb.String()
+}
+
+func renderAboutMe() string {
+	var sb strings.Builder
+
+	sb.WriteString(md.H1("👋 Welcome to Ivan's Homepage!"))
+	sb.WriteString("\n")
+
+	sb.WriteString(md.H2("👨‍💻 About Me"))
+	sb.WriteString("\n")
+
+	sb.WriteString(md.Blockquote(aboutMe))
+
+	return sb.String()
+}
+
+func renderContactsUrl() string {
+	var sb strings.Builder
+
+	sb.WriteString(md.HorizontalRule())
+	sb.WriteString("\n")
+
+	sb.WriteString(md.H2("🔗 Let's Connect"))
+	sb.WriteString("\n")
+
+	items := []string{
+		"🐙 " + md.Link("GitHub", githubUrl),
+		"💼 " + md.Link("LinkedIn", linkedinUrl),
+	}
+	sb.WriteString(md.BulletList(items))
+
+	return sb.String()
+}
+
+func UpdateGithubUrl(url string) {
+	Ownable.AssertCallerIsOwner()
+	githubUrl = url
+}
+
+func UpdateLinkedinUrl(url string) {
+	Ownable.AssertCallerIsOwner()
+	linkedinUrl = url
+}
+
+func UpdateAboutMe(text string) {
+	Ownable.AssertCallerIsOwner()
+	aboutMe = text
+}
+
+func UpdateImagePrice(newPrice int64) {
+	Ownable.AssertCallerIsOwner()
+	imageUpdatePrice = newPrice
+}
+
+func UpdateIsValidUrlFunction(f func(string) bool) {
+	Ownable.AssertCallerIsOwner()
+	isValidUrl = f
+}

examples/gno.land/r/ursulovic/home/home_test.gno

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+package home
+
+import (
+	"std"
+	"testing"
+
+	"gno.land/p/demo/testutils"
+)
+
+func TestUpdateGithubUrl(t *testing.T) {
+	caller := std.Address("g1d24j8fwnc0w5q427fauyey4gdd30qgu69k6n0x")
+	std.TestSetOrigCaller(caller)
+
+	newUrl := "https://github.com/example"
+
+	UpdateGithubUrl(newUrl)
+
+	if githubUrl != newUrl {
+		t.Fatalf("GitHub url not updated properly!")
+	}
+}
+
+func TestUpdateLinkedinUrl(t *testing.T) {
+	caller := std.Address("g1d24j8fwnc0w5q427fauyey4gdd30qgu69k6n0x")
+	std.TestSetOrigCaller(caller)
+
+	newUrl := "https://www.linkedin.com/in/example"
+
+	UpdateGithubUrl(newUrl)
+
+	if githubUrl != newUrl {
+		t.Fatalf("LinkedIn url not updated properly!")
+	}
+}
+
+func TestUpdateAboutMe(t *testing.T) {
+	caller := std.Address("g1d24j8fwnc0w5q427fauyey4gdd30qgu69k6n0x")
+	std.TestSetOrigCaller(caller)
+
+	newAboutMe := "This is new description!"
+
+	UpdateAboutMe(newAboutMe)
+
+	if aboutMe != newAboutMe {
+		t.Fatalf("About mew not updated properly!")
+	}
+}
+
+func TestUpdateSelectedImage(t *testing.T) {
+	var user = testutils.TestAddress("user")
+	std.TestSetOrigCaller(user)
+
+	validImageUrl := "https://i.ibb.co/hLtmnX0/beautiful-rain-forest-ang-ka-nature-trail-doi-inthanon-national-park-thailand-36703721.webp"
+
+	coinsSent := std.NewCoins(std.NewCoin("ugnot", 5000000)) // Update to match the price expected by your function
+	std.TestSetOrigSend(coinsSent, std.NewCoins())
+
+	UpdateSelectedImage(validImageUrl)
+
+	if selectedImage != validImageUrl {
+		t.Fatalf("Valid image URL rejected!")
+	}
+
+	invalidImageUrl := "https://ibb.co/Kb3rQNn"
+
+	defer func() {
+		if r := recover(); r == nil {
+			t.Fatalf("Expected panic for invalid image URL, but got no panic")
+		}
+	}()
+
+	UpdateSelectedImage(invalidImageUrl)
+
+	invalidCoins := std.NewCoins(std.NewCoin("ugnot", 1000000))
+	std.TestSetOrigSend(invalidCoins, std.NewCoins())
+
+	defer func() {
+		if r := recover(); r == nil {
+			t.Fatalf("Expected panic for incorrect coin denomination or amount, but got no panic")
+		}
+	}()
+
+	UpdateSelectedImage(validImageUrl)
+}
+
+func TestUpdateImagePrice(t *testing.T) {
+	caller := std.Address("g1d24j8fwnc0w5q427fauyey4gdd30qgu69k6n0x")
+	std.TestSetOrigCaller(caller)
+
+	var newImageUpdatePrice int64 = 3000000
+
+	UpdateImagePrice(newImageUpdatePrice)
+
+	if imageUpdatePrice != newImageUpdatePrice {
+		t.Fatalf("Image update price not updated properly!")
+	}
+}

examples/gno.land/r/ursulovic/registry/gno.mod

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+module gno.land/r/ursulovic/registry

examples/gno.land/r/ursulovic/registry/registry.gno

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+package registry
+
+import (
+	"errors"
+	"std"
+)
+
+var (
+	mainAddress   std.Address
+	backupAddress std.Address
+
+	ErrInvalidAddr  = errors.New("Ivan's registry: Invalid address")
+	ErrUnauthorized = errors.New("Ivan's registry: Unauthorized")
+)
+
+func init() {
+	mainAddress = "g1d24j8fwnc0w5q427fauyey4gdd30qgu69k6n0x"
+	backupAddress = "g1mw2xft3eava9kfhqw3fjj3kkf3pkammty0mtv7"
+}
+
+func MainAddress() std.Address {
+	return mainAddress
+}
+
+func BackupAddress() std.Address {
+	return backupAddress
+}
+
+func SetMainAddress(addr std.Address) error {
+	assertAuthorized()
+
+	if !addr.IsValid() {
+		return ErrInvalidAddr
+	}
+
+	mainAddress = addr
+	return nil
+}
+
+func SetBackupAddress(addr std.Address) error {
+	assertAuthorized()
+
+	if !addr.IsValid() {
+		return ErrInvalidAddr
+	}
+
+	backupAddress = addr
+	return nil
+}
+
+// It will stay here for now, might be useful later
+func assertAuthorized() {
+	caller := std.PrevRealm().Addr()
+	isAuthorized := caller == mainAddress || caller == backupAddress
+
+	if !isAuthorized {
+		panic(ErrUnauthorized)
+	}
+}