Small changes

2025-08-06 21:27:34 +02:00
parent 3acc9e9ebb
commit af8d26351d
6 changed files with 625 additions and 79 deletions
--- a/internal/db/database.go
+++ b/internal/db/database.go
@@ -14,6 +14,20 @@ type Database struct {
 	client *pgx.Conn
 }

+type URL struct {
+	ShortURL  string    `json:"shorturl"`
+	URL       string    `json:"url"`
+	ExpiresAt time.Time `json:"expires_at"`
+}
+
+type PageVisit struct {
+	ShortURL   string    `json:"shorturl"`
+	Count      int       `json:"count"`
+	IP_Address string    `json:"ip_address"`
+	UserAgent  string    `json:"user_agent"`
+	CreatedAt  time.Time `json:"created_at"`
+}
+
 func NewDatabaseClient(config utils.DatabaseConfig) (*Database, error) {
 	conn, err := pgx.Connect(context.Background(), utils.DatabaseUrl())
 	if err != nil {
@@ -24,15 +38,47 @@ func NewDatabaseClient(config utils.DatabaseConfig) (*Database, error) {
 	return &Database{client: conn}, nil
 }

-func (d *Database) InsertNewURL(shorturl string, url string) error {
+func (d *Database) InsertNewURL(u URL) error {
+	fmt.Print("InsertNewURL called with URL: ", u.URL)
 	timeNow := time.Now()
-	_, err := d.client.Exec(context.Background(), "INSERT INTO urls (shorturl, url, created_at) VALUES ($1, $2, $3)", shorturl, url, timeNow)
+	_, err := d.client.Exec(context.Background(), "INSERT INTO urls (shorturl, url, created_at,expires_at,active) VALUES ($1, $2, $3,$4,$5)", u.ShortURL, u.URL, timeNow, u.ExpiresAt, true)
 	if err != nil {
 		return fmt.Errorf("failed to insert URL into database: %w", err)
 	}
 	return nil
 }

+func (d *Database) InsertAnalytics(p PageVisit) error {
+	timeNow := time.Now()
+	_, err := d.client.Exec(context.Background(), "INSERT INTO analytics (shorturl, count, ip_address, user_agent, created_at) VALUES ($1, $2, $3, $4, $5)", p.ShortURL, p.Count, p.IP_Address, p.UserAgent, timeNow)
+	if err != nil {
+		return fmt.Errorf("failed to insert analytics into database: %w", err)
+	}
+	return nil
+}
+
+func (d *Database) GetAnalytics(shorturl string) ([]PageVisit, error) {
+	rows, err := d.client.Query(context.Background(), "SELECT shorturl, count, ip_address, user_agent, created_at FROM analytics WHERE shorturl = $1", shorturl)
+	if err != nil {
+		return nil, fmt.Errorf("failed to retrieve analytics from database: %w", err)
+	}
+	defer rows.Close()
+
+	var analytics []PageVisit
+	for rows.Next() {
+		var p PageVisit
+		err := rows.Scan(&p.ShortURL, &p.Count, &p.IP_Address, &p.UserAgent, &p.CreatedAt)
+		if err != nil {
+			return nil, fmt.Errorf("failed to scan analytics row: %w", err)
+		}
+		analytics = append(analytics, p)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("error iterating over analytics rows: %w", err)
+	}
+	return analytics, nil
+}
+
 func (d *Database) DeleteURL(shorturl string) error {
 	_, err := d.client.Exec(context.Background(), "DELETE FROM urls WHERE shorturl = $1", shorturl)
 	if err != nil {
--- a/internal/db/migrations/20250806_initial.sql
+++ b/internal/db/migrations/20250806_initial.sql
@@ -0,0 +1,20 @@
+CREATE TABLE urls (
+    shorturl VARCHAR(7) PRIMARY KEY,
+    url VARCHAR(100) NOT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    expires_at TIMESTAMP DEFAULT NULL,
+    active BOOLEAN DEFAULT TRUE
+
+);
+
+CREATE TABLE analytics (
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    shorturl VARCHAR(7) NOT NULL,
+    count INTEGER DEFAULT 0,
+    ip_address VARCHAR(50) DEFAULT NULL,
+    user_agent VARCHAR(1024) DEFAULT NULL,
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    FOREIGN KEY (shorturl) REFERENCES urls(shorturl),
+
+);
--- a/internal/shortener/handler.go
+++ b/internal/shortener/handler.go
@@ -1,12 +1,15 @@
 package shortener

 import (
+	"context"
+	"encoding/json"
 	"fmt"
 	"net/http"
+	"sync"
+	"time"

 	"github.com/ferdzo/ferurl/internal/cache"
 	"github.com/ferdzo/ferurl/internal/db"
-
 	"github.com/ferdzo/ferurl/utils"
 	"github.com/go-chi/chi/v5"
 )
@@ -18,6 +21,7 @@ type Service struct {

 type Handler struct {
 	service *Service
+	baseURL string
 }

 func NewService(redisConfig utils.RedisConfig, databaseConfig utils.DatabaseConfig) (*Service, error) {
@@ -33,17 +37,37 @@ func NewService(redisConfig utils.RedisConfig, databaseConfig utils.DatabaseConf
 	return &Service{cache: redisClient, database: databaseClient}, nil
 }

-func NewHandler(service *Service) (*Handler, error) {
+func NewHandler(service *Service, baseURL string) (*Handler, error) {
 	if service == nil {
 		return nil, fmt.Errorf("service is nil")
 	}

-	return &Handler{service: service}, nil
+	return &Handler{service: service, baseURL: baseURL}, nil
 }
-
 func (h *Handler) CreateShortURL(w http.ResponseWriter, r *http.Request) {
-	longUrl := r.FormValue("url")
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "POST, OPTIONS")
+	w.Header().Set("Access-Control-Allow-Headers", "Content-Type")

+	if r.Method == "OPTIONS" {
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+
+	var input struct {
+		URL       string    `json:"url"`
+		ExpiresAt time.Time `json:"expires_at"`
+	}
+
+	decoder := json.NewDecoder(r.Body)
+	if err := decoder.Decode(&input); err != nil {
+		http.Error(w, "Invalid JSON input", http.StatusBadRequest)
+		return
+	}
+
+	longUrl := input.URL
 	if longUrl == "" {
 		http.Error(w, "Long URL is required", http.StatusBadRequest)
 		return
@@ -52,26 +76,75 @@ func (h *Handler) CreateShortURL(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "Invalid URL", http.StatusBadRequest)
 		return
 	}
+	expiresAt := input.ExpiresAt

 	shortUrl := generateShortUrl(longUrl)
+	fetchedShortUrl, _ := h.fetchUrl(shortUrl)
+	if fetchedShortUrl != "" {
+		fullShortUrl := fmt.Sprintf("%s%s", h.baseURL, shortUrl)
+		json.NewEncoder(w).Encode(map[string]string{"short_url": fullShortUrl})
+		return
+	}
+
+	newUrl := db.URL{
+		URL:       longUrl,
+		ShortURL:  shortUrl,
+		ExpiresAt: expiresAt,
+	}
+
+	if err := h.service.storeUrl(newUrl); err != nil {
+		fmt.Println(err)
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+		return
+	}
+
+	fullShortUrl := fmt.Sprintf("%s%s", h.baseURL, shortUrl)
+	json.NewEncoder(w).Encode(map[string]string{"short_url": fullShortUrl})

-	http.Redirect(w, r, shortUrl, http.StatusSeeOther)
 }

 func (h *Handler) GetUrl(w http.ResponseWriter, r *http.Request) {
-	id := chi.URLParam(r, "key")
-	if id == "" {
+	w.Header().Set("Access-Control-Allow-Origin", "*")
+	w.Header().Set("Access-Control-Allow-Methods", "GET, OPTIONS")
+
+	if r.Method == "OPTIONS" {
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+	shortKey := chi.URLParam(r, "key")
+	if shortKey == "" {
 		http.Error(w, "ID is required", http.StatusBadRequest)
 		return
 	}

-	shortUrl, err := h.fetchUrl(id)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
+	if !utils.IsValidShortUrl(shortKey) {
+		http.Error(w, "Invalid short URL", http.StatusBadRequest)
 		return
 	}

-	http.Redirect(w, r, shortUrl, http.StatusSeeOther)
+	longUrl, err := h.fetchUrl(shortKey)
+	if err != nil {
+		fmt.Println(err)
+		http.Error(w, "URL not found", http.StatusInternalServerError)
+		return
+	}
+
+	pv := db.PageVisit{
+		ShortURL:   shortKey,
+		Count:      1,
+		IP_Address: r.RemoteAddr,
+		UserAgent:  r.UserAgent(),
+		CreatedAt:  time.Now(),
+	}
+
+	err = h.service.database.InsertAnalytics(pv)
+	if err != nil {
+		fmt.Println(err)
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+		return
+	}
+
+	http.Redirect(w, r, longUrl, http.StatusSeeOther)
 }

 func generateShortUrl(url string) string {
@@ -81,13 +154,66 @@ func generateShortUrl(url string) string {
 }

 func (h *Handler) fetchUrl(id string) (string, error) {
-	if url, err := h.service.fetchUrlFromCache(id); err == nil {
-		return url, nil
+	type result struct {
+		url    string
+		err    error
+		source string
 	}
-	if url, err := h.service.fetchUrlFromDatabase(id); err == nil {
-		return url, nil
+	resultChan := make(chan result, 2)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	go func() {
+		url, err := h.service.fetchUrlFromCache(id)
+		select {
+		case resultChan <- result{url, err, "cache"}:
+		case <-ctx.Done():
+			return
 		}
-	return "", fmt.Errorf("URL not found")
+	}()
+
+	go func() {
+		url, err := h.service.fetchUrlFromDatabase(id)
+		select {
+		case resultChan <- result{url, err, "db"}:
+		case <-ctx.Done():
+			return
+		}
+	}()
+
+	var foundInDB string
+	var cacheHit bool
+	var lastErr error
+
+	for range 2 {
+		res := <-resultChan
+		if res.err == nil {
+			if res.source == "db" {
+				foundInDB = res.url
+				if !cacheHit {
+					continue
+				}
+			} else if res.source == "cache" {
+				cacheHit = true
+				if foundInDB != "" {
+					return res.url, nil
+				}
+			}
+
+			return res.url, nil
+		}
+		lastErr = res.err
+	}
+
+	if foundInDB != "" {
+		go func() {
+			_ = h.service.cache.Set(id, foundInDB)
+			fmt.Println("URL updated in Redis")
+		}()
+		return foundInDB, nil
+	}
+
+	return "", lastErr
 }

 func (s *Service) fetchUrlFromCache(shortUrl string) (string, error) {
@@ -97,9 +223,42 @@ func (s *Service) fetchUrlFromCache(shortUrl string) (string, error) {
 	return "", fmt.Errorf("URL not found")
 }

-func (s *Service) fetchUrlFromDatabase(id string) (string, error) {
-	if url, err := s.database.GetURL(id); err == nil {
+func (s *Service) fetchUrlFromDatabase(shortUrl string) (string, error) {
+	if url, err := s.database.GetURL(shortUrl); err == nil {
 		return url, nil
 	}
+
 	return "", fmt.Errorf("URL not found")
 }
+
+func (s *Service) storeUrl(u db.URL) error {
+	var wg sync.WaitGroup
+	errChan := make(chan error, 2)
+
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		if err := s.cache.Set(u.ShortURL, u.URL); err != nil {
+			errChan <- err
+		}
+	}()
+
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		if err := s.database.InsertNewURL(u); err != nil {
+			errChan <- err
+		}
+	}()
+
+	go func() {
+		wg.Wait()
+		close(errChan)
+	}()
+
+	for err := range errChan {
+		return err
+	}
+
+	return nil
+}
--- a/main.go
+++ b/main.go
@@ -13,41 +13,36 @@ import (
 func main() {
 	fmt.Println("Welcome to ferurl, a simple URL shortener!")

-	redisConfig, err := utils.LoadRedisConfig()
-	if err != nil {
-		fmt.Println("Error loading Redis config:", err)
-		return
-	}
-	dbConfig, err := utils.LoadDbConfig()
-	if err != nil {
-		fmt.Println("Error loading DB config:", err)
-		return
-	}
+	redisConfig := utils.LoadRedisConfig()
+	dbConfig := utils.LoadDbConfig()

 	s, err := shortner.NewService(redisConfig, dbConfig)
 	if err != nil {
 		fmt.Println("Error creating service:", err)
 		return
 	}
-
-	h, err := shortner.NewHandler(s)
+	baseUrl := utils.GetEnv("BASE_URL", "https://url.ferdzo.xyz")
+	h, err := shortner.NewHandler(s, baseUrl)
 	if err != nil {
 		fmt.Println("Error creating handler:", err)
 		return
 	}
+
 	initServer(*h)
 }

 func initServer(h shortner.Handler) {
 	r := chi.NewRouter()
 	r.Use(middleware.Logger)
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		http.ServeFile(w, r, "./web/index.html")
+	})
 	r.Get("/health", func(w http.ResponseWriter, r *http.Request) {
 		fmt.Fprint(w, "Welcome to ferurl!")
 	})
 	fmt.Println("Server started on port 3000")
 	r.Post("/create", h.CreateShortURL)
 	r.Get("/{key}", h.GetUrl)
-	http.FileServer(http.Dir("web"))

 	http.ListenAndServe(":3000", r)
 }
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -23,3 +23,16 @@ func IsValidUrl(s string) bool {
 	return true

 }
+
+func IsValidShortUrl(s string) bool {
+	if len(s) < 3 || len(s) > 10 {
+		return false
+	}
+	shortUrlRegex := `^[a-zA-Z0-9]+$`
+	matched, err := regexp.MatchString(shortUrlRegex, s)
+	if err != nil || !matched {
+		return false
+	}
+
+	return true
+}
--- a/web/index.html
+++ b/web/index.html
@@ -3,75 +3,353 @@
 <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    <title>Ferurl - URL Shortener</title>
+    <title>Ferurl - Modern URL Shortener</title>
+    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap">
    <style>
+        :root {
+            --primary-color: #3b82f6;
+            --primary-hover: #2563eb;
+            --secondary-color: #f3f4f6;
+            --text-color: #1f2937;
+            --light-text: #6b7280;
+            --success-color: #10b981;
+            --error-color: #ef4444;
+            --border-radius: 8px;
+            --box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
+        }
+
+        * {
+            box-sizing: border-box;
+            margin: 0;
+            padding: 0;
+        }
+
        body {
-            font-family: Arial, sans-serif;
-            max-width: 600px;
-            margin: 0 auto;
-            padding: 20px;
+            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
+            background-color: #f9fafb;
+            color: var(--text-color);
            line-height: 1.6;
-        }
-        .container {
-            border: 1px solid #ddd;
-            border-radius: 5px;
+            min-height: 100vh;
+            display: flex;
+            flex-direction: column;
+            align-items: center;
+            justify-content: center;
            padding: 20px;
-            margin-top: 20px;
-            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
-        h1 {
-            color: #333;
+
+        .app-container {
+            width: 100%;
+            max-width: 550px;
+        }
+
+        .logo {
            text-align: center;
+            margin-bottom: 2rem;
        }
+
+        .logo h1 {
+            font-size: 2.5rem;
+            font-weight: 700;
+            color: var(--primary-color);
+            letter-spacing: -0.5px;
+        }
+
+        .logo span {
+            color: var(--light-text);
+            font-size: 1rem;
+            font-weight: 400;
+        }
+
+        .card {
+            background-color: white;
+            border-radius: var(--border-radius);
+            box-shadow: var(--box-shadow);
+            padding: 2rem;
+            margin-bottom: 1.5rem;
+            transition: transform 0.2s ease;
+        }
+
+        .card:hover {
+            transform: translateY(-5px);
+        }
+
        form {
            display: flex;
            flex-direction: column;
+            gap: 1.5rem;
        }
+
+        .input-group {
+            display: flex;
+            flex-direction: column;
+            gap: 0.5rem;
+        }
+
        label {
-            margin-bottom: 5px;
-            font-weight: bold;
+            font-weight: 500;
+            font-size: 0.875rem;
+            color: var(--light-text);
        }
+
        input[type="url"] {
-            padding: 8px;
-            margin-bottom: 15px;
-            border: 1px solid #ddd;
-            border-radius: 4px;
-            font-size: 16px;
+            width: 100%;
+            padding: 0.75rem 1rem;
+            border: 1px solid #e5e7eb;
+            border-radius: var(--border-radius);
+            font-size: 1rem;
+            transition: border-color 0.15s ease;
+            outline: none;
        }
+
+        input[type="url"]:focus {
+            border-color: var(--primary-color);
+            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
+        }
+
+        input[type="url"]::placeholder {
+            color: #d1d5db;
+        }
+
        button {
-            background-color: #4CAF50;
+            padding: 0.75rem 1.5rem;
+            background-color: var(--primary-color);
            color: white;
-            padding: 10px 15px;
            border: none;
-            border-radius: 4px;
+            border-radius: var(--border-radius);
+            font-weight: 500;
+            font-size: 1rem;
            cursor: pointer;
-            font-size: 16px;
+            transition: background-color 0.2s ease, transform 0.1s ease;
        }
+
        button:hover {
-            background-color: #45a049;
+            background-color: var(--primary-hover);
        }
-        .result {
-            margin-top: 20px;
-            padding: 15px;
-            border: 1px solid #ddd;
-            border-radius: 4px;
-            background-color: #f9f9f9;
+
+        button:active {
+            transform: scale(0.98);
+        }
+
+        .btn-container {
+            display: flex;
+            align-items: center;
+            gap: 1rem;
+        }
+
+        .loader {
            display: none;
+            width: 24px;
+            height: 24px;
+            border: 3px solid rgba(255, 255, 255, 0.3);
+            border-radius: 50%;
+            border-top-color: white;
+            animation: spin 1s ease-in-out infinite;
+        }
+
+        @keyframes spin {
+            to { transform: rotate(360deg); }
+        }
+
+        .result {
+            display: none;
+            opacity: 0;
+            transition: opacity 0.3s ease;
+        }
+
+        .result.visible {
+            opacity: 1;
+            animation: slideIn 0.5s ease forwards;
+        }
+
+        @keyframes slideIn {
+            from {
+                transform: translateY(20px);
+                opacity: 0;
+            }
+            to {
+                transform: translateY(0);
+                opacity: 1;
+            }
+        }
+
+        .result-card {
+            background-color: white;
+            border-radius: var(--border-radius);
+            box-shadow: var(--box-shadow);
+            padding: 1.5rem;
+        }
+
+        .result-title {
+            font-size: 1rem;
+            color: var(--light-text);
+            margin-bottom: 0.75rem;
+        }
+
+        .url-container {
+            display: flex;
+            align-items: center;
+            justify-content: space-between;
+            background-color: var(--secondary-color);
+            border-radius: var(--border-radius);
+            padding: 0.75rem 1rem;
+            margin-bottom: 1rem;
+            overflow: hidden;
+        }
+
+        .short-url {
+            font-weight: 500;
+            color: var(--primary-color);
+            text-decoration: none;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+            max-width: 80%;
+        }
+
+        .short-url:hover {
+            text-decoration: underline;
+        }
+
+        .copy-btn {
+            background-color: transparent;
+            color: var(--primary-color);
+            border: 1px solid var(--primary-color);
+            padding: 0.375rem 0.75rem;
+            font-size: 0.875rem;
+            transition: all 0.2s ease;
+        }
+
+        .copy-btn:hover {
+            background-color: var(--primary-color);
+            color: white;
+        }
+
+        .copy-btn.copied {
+            background-color: var(--success-color);
+            border-color: var(--success-color);
+            color: white;
+        }
+
+        .stats {
+            display: flex;
+            justify-content: space-between;
+            gap: 1rem;
+        }
+
+        .stat-item {
+            flex: 1;
+            text-align: center;
+            padding: 0.75rem;
+            background-color: var(--secondary-color);
+            border-radius: var(--border-radius);
+        }
+
+        .stat-value {
+            font-size: 1.25rem;
+            font-weight: 600;
+            color: var(--primary-color);
+        }
+
+        .stat-label {
+            font-size: 0.75rem;
+            color: var(--light-text);
+        }
+
+        .footer {
+            margin-top: 2rem;
+            text-align: center;
+            font-size: 0.875rem;
+            color: var(--light-text);
+        }
+
+        .footer a {
+            color: var(--primary-color);
+            text-decoration: none;
+        }
+
+        .footer a:hover {
+            text-decoration: underline;
+        }
+
+        /* Error state */
+        .error-message {
+            display: none;
+            color: var(--error-color);
+            font-size: 0.875rem;
+            margin-top: 0.5rem;
+            padding: 0.5rem;
+            border-radius: var(--border-radius);
+            background-color: rgba(239, 68, 68, 0.1);
+        }
+
+        @media (max-width: 600px) {
+            .app-container {
+                padding: 1rem;
+            }
+
+            .card {
+                padding: 1.5rem;
+            }
+
+            .stats {
+                flex-direction: column;
+                gap: 0.5rem;
+            }
        }
    </style>
 </head>
 <body>
-    <h1>Ferurl - URL Shortener</h1>
+    <div class="app-container">
+        <div class="logo">
+            <h1>ferurl</h1>
+            <span>Fast, simple URL shortening</span>
+        </div>

-    <div class="container">
+        <div class="card">
            <form id="urlForm">
-            <label for="longUrl">Enter your long URL:</label>
-            <input type="url" id="longUrl" name="longUrl" required placeholder="https://example.com/your/very/long/url/goes/here">
-            <button type="submit">Shorten URL</button>
+                <div class="input-group">
+                    <label for="longUrl">Enter your long URL</label>
+                    <input
+                        type="url"
+                        id="longUrl"
+                        name="longUrl"
+                        required
+                        placeholder="https://example.com/your/very/long/url/goes/here"
+                        autocomplete="off"
+                    >
+                </div>
+                <div class="btn-container">
+                    <button type="submit">
+                        <span>Shorten URL</span>
+                        <span class="loader" id="submitLoader"></span>
+                    </button>
+                </div>
+                <div class="error-message" id="errorMessage"></div>
            </form>
+        </div>

-        <div id="result" class="result">
-            <p>Your shortened URL: <a id="shortUrl" href="#" target="_blank"></a></p>
+        <div class="result" id="result">
+            <div class="result-card">
+                <div class="result-title">Your shortened URL is ready!</div>
+                <div class="url-container">
+                    <a id="shortUrl" class="short-url" href="#" target="_blank"></a>
+                    <button id="copyBtn" class="copy-btn">Copy</button>
+                </div>
+                <div class="stats">
+                    <div class="stat-item">
+                        <div class="stat-value">100%</div>
+                        <div class="stat-label">Shorter</div>
+                    </div>
+                    <div class="stat-item">
+                        <div class="stat-value">30</div>
+                        <div class="stat-label">Days valid</div>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="footer">
+            <p>Made with ❤️ by <a href="https://github.com/ferdzo" target="_blank">ferdzo</a></p>
        </div>
    </div>

@@ -80,9 +358,19 @@
            e.preventDefault();

            const longUrl = document.getElementById('longUrl').value;
+            const submitBtn = document.querySelector('button[type="submit"]');
+            const submitText = submitBtn.querySelector('span:not(.loader)');
+            const loader = document.getElementById('submitLoader');
+            const errorMessage = document.getElementById('errorMessage');
+
+            errorMessage.style.display = 'none';
+
+            submitText.style.display = 'none';
+            loader.style.display = 'inline-block';
+            submitBtn.disabled = true;

            try {
-                const response = await fetch('http://localhost:8080/create', {
+                const response = await fetch('/create', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
@@ -96,19 +384,44 @@

                const data = await response.json();

-                // Show the result
                const resultDiv = document.getElementById('result');
                const shortUrlLink = document.getElementById('shortUrl');

-                shortUrlLink.href = `http://localhost:8080/${data.shortCode}`;
-                shortUrlLink.textContent = `http://localhost:8080/${data.shortCode}`;
+                shortUrlLink.href = data.short_url;
+                shortUrlLink.textContent = data.short_url;
+
                resultDiv.style.display = 'block';
+                setTimeout(() => {
+                    resultDiv.classList.add('visible');
+                }, 10);
+
+                document.getElementById('longUrl').value = '';

            } catch (error) {
                console.error('Error:', error);
-                alert('Failed to shorten URL. Please try again.');
+                errorMessage.textContent = 'Failed to shorten URL. Please try again.';
+                errorMessage.style.display = 'block';
+            } finally {
+                submitText.style.display = 'inline';
+                loader.style.display = 'none';
+                submitBtn.disabled = false;
            }
        });
+
+        document.getElementById('copyBtn').addEventListener('click', function() {
+            const shortUrl = document.getElementById('shortUrl').href;
+            const copyBtn = this;
+
+            navigator.clipboard.writeText(shortUrl).then(function() {
+                copyBtn.textContent = 'Copied!';
+                copyBtn.classList.add('copied');
+
+                setTimeout(() => {
+                    copyBtn.textContent = 'Copy';
+                    copyBtn.classList.remove('copied');
+                }, 2000);
+            });
+        });
    </script>
 </body>
 </html>