s

main.go

@@ -2,13 +2,108 @@ package main
 
 import (
 	"encoding/json"
+	"fmt"
+	"html"
 	"log"
 	"net/http"
 	"strings"
+	"strconv"
 
 	"gopkg.in/gomail.v2"
 )
 
+// Copyable snippets used by /docs and dedicated snippet endpoints
+const docsHTMLSnippet = `
+<div class="bg-white rounded-xl shadow-lg overflow-hidden">
+  <div class="md:flex">
+    <!-- Contact Form -->
+    <div class="w-full md:w-1/2 p-8">
+      <form id="contact-form" class="space-y-6">
+        <input type="hidden" name="domain" value="sportcreative.eu" />
+        
+        <div>
+          <label for="name" class="block text-sm font-medium text-gray-700 mb-1">Jméno a příjmení *</label>
+          <input type="text" id="name" name="name" required 
+            class="w-full px-4 py-3 rounded-lg border border-gray-300 focus:ring-2 focus:ring-sport-purple focus:border-transparent transition duration-200"
+            placeholder="Vaše celé jméno">
+        </div>
+        
+        <div>
+          <label for="email" class="block text-sm font-medium text-gray-700 mb-1">E-mail *</label>
+          <input type="email" id="email" name="email" required
+            class="w-full px-4 py-3 rounded-lg border border-gray-300 focus:ring-2 focus:ring-sport-purple focus:border-transparent transition duration-200"
+            placeholder="[email protected]">
+        </div>
+        
+        <div>
+          <label for="subject" class="block text-sm font-medium text-gray-700 mb-1">Předmět *</label>
+          <input type="text" id="subject" name="subject" required
+            class="w-full px-4 py-3 rounded-lg border border-gray-300 focus:ring-2 focus:ring-sport-purple focus:border-transparent transition duration-200"
+            placeholder="O co se zajímáte?">
+        </div>
+        
+        <div>
+          <label for="message" class="block text-sm font-medium text-gray-700 mb-1">Zpráva *</label>
+          <textarea id="message" name="message" rows="5" required
+            class="w-full px-4 py-3 rounded-lg border border-gray-300 focus:ring-2 focus:ring-sport-purple focus:border-transparent transition duration-200"
+            placeholder="Jak vám můžeme pomoci?"></textarea>
+        </div>
+        
+        <div class="pt-2">
+          <button type="submit" 
+            class="w-full bg-sport-purple text-white font-medium py-3 px-6 rounded-full hover:shadow-lg transition duration-300 hover:bg-sport-orange">
+            Odeslat zprávu
+            <ion-icon name="arrow-forward-outline" class="ml-2"></ion-icon>
+          </button>
+        </div>
+      </form>
+    </div>
+  </div>
+</div>`
+
+const docsJSSnippet = `
+// Contact form submission
+const form = document.getElementById('contact-form');
+if (form) {
+  form.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    
+    const submitButton = form.querySelector('button[type="submit"]');
+    const originalButtonText = submitButton.innerHTML;
+    
+    try {
+      // Show loading state
+      submitButton.disabled = true;
+      submitButton.innerHTML = 'Odesílám...';
+      
+      const data = Object.fromEntries(new FormData(form));
+      
+      const res = await fetch('https://sendmail.tdvorak.dev/send' + window.location.search, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(data)
+      });
+      
+      const text = await res.text();
+      
+      if (res.ok) {
+        // Show success message
+        alert('Děkujeme za vaši zprávu! Brzy se vám ozveme zpět.');
+        form.reset();
+      } else {
+        throw new Error(text || 'Něco se pokazilo. Zkuste to prosím znovu.');
+      }
+    } catch (error) {
+      console.error('Error:', error);
+      alert(error.message || 'Při odesílání zprávy došlo k chybě. Zkuste to prosím znovu později.');
+    } finally {
+      // Reset button state
+      submitButton.disabled = false;
+      submitButton.innerHTML = originalButtonText;
+    }
+  });
+}`
+
 type FormData struct {
 	Domain  string `json:"domain"`
 	Name    string `json:"name"`
@@ -17,6 +112,85 @@ type FormData struct {
 	Message string `json:"message"`
 }
 
+// rootHandler serves a minimal HTML page with a contact form and JS to submit to /send
+func rootHandler(w http.ResponseWriter, r *http.Request) {
+    if r.Method != http.MethodGet {
+        http.Error(w, "GET only", http.StatusMethodNotAllowed)
+        return
+    }
+    w.Header().Set("Content-Type", "text/html; charset=utf-8")
+    htmlEsc := html.EscapeString(docsHTMLSnippet)
+    jsEsc := html.EscapeString(docsJSSnippet)
+    page := fmt.Sprintf(`<!DOCTYPE html>
+<html lang="cs">
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1" />
+  <title>SendMail API – Dokumentace</title>
+  <style>
+    body { font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji"; background: #0b1020; color: #e2e8f0; margin:0; }
+    .container { max-width: 980px; margin: 0 auto; padding: 2rem; }
+    h1 { margin: 0 0 .5rem; font-size: 2rem; }
+    .muted { color:#94a3b8; }
+    .card { background: #0f172a; border: 1px solid rgba(148,163,184,.18); border-radius: 12px; padding: 1rem 1.25rem; margin-bottom: 1rem; }
+    code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }
+    pre { background: #0b1220; border:1px solid rgba(148,163,184,.18); border-radius:10px; padding:.75rem; overflow:auto; }
+  </style>
+</head>
+<body>
+  <div class="container">
+    <h1>SendMail API</h1>
+    <p class="muted">Server: <code>http://localhost:8080</code></p>
+
+    <div class="card">
+      <h2>1) POST /send</h2>
+      <p>Tělo JSON: <code>{ domain?, name, email, subject, message }</code></p>
+      <p>Volitelné SMTP v query: <code>?email=&pass=&server=&port=</code></p>
+      <h3>Příklad cURL (přednastavená doména)</h3>
+      <pre><code>curl -X POST http://localhost:8080/send \
+  -H "Content-Type: application/json" \
+  -d '{
+    "domain":"sportcreative.eu",
+    "name":"Jan Novák",
+    "email":"[email protected]",
+    "subject":"Dotaz",
+    "message":"Dobrý den..."
+  }'
+      </code></pre>
+      <h3>Příklad cURL (SMTP v URL)</h3>
+      <pre><code>curl -X POST "http://localhost:8080/[email protected]&pass=SECRET&server=smtp.example.com&port=465" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "name":"Jan Novák",
+    "email":"[email protected]",
+    "subject":"Dotaz",
+    "message":"Dobrý den..."
+  }'
+      </code></pre>
+    </div>
+
+    <div class="card">
+      <h2>2) GET /send-params</h2>
+      <p>Query: <code>?email=&pass=&server=&port=&to=&from=&subject=&message=</code> (když chybí <code>to</code>/<code>from</code>, použije se <code>email</code>).</p>
+      <h3>Příklad cURL</h3>
+      <pre><code>curl "http://localhost:8080/[email protected]&pass=SECRET&server=smtp.example.com&port=465&[email protected]&[email protected]&subject=Hello&message=Ahoj"</code></pre>
+    </div>
+
+    <div class="card">
+      <h2>HTML formulář (vložit do stránky)</h2>
+      <pre><code>%s</code></pre>
+    </div>
+
+    <div class="card">
+      <h2>JavaScript (vložit do stránky)</h2>
+      <pre><code>%s</code></pre>
+    </div>
+  </div>
+</body>
+</html>`, htmlEsc, jsEsc)
+    w.Write([]byte(page))
+}
+
 type EmailConfig struct {
 	Email    string
 	Password string
@@ -44,16 +218,41 @@ func sendHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	data.Domain = strings.ToLower(strings.TrimSpace(data.Domain))
+	// Determine SMTP configuration: prefer query params if provided; otherwise use domain map
-	config, ok := domainMap[data.Domain]
+	q := r.URL.Query()
-	if !ok {
+	qEmail := strings.TrimSpace(q.Get("email"))
-		http.Error(w, "Unknown domain", http.StatusUnauthorized)
+	qPass := q.Get("pass")
-		return
+	qServer := strings.TrimSpace(q.Get("server"))
+	qPortStr := strings.TrimSpace(q.Get("port"))
+
+	var config EmailConfig
+	if qEmail != "" || qPass != "" || qServer != "" || qPortStr != "" {
+		if qEmail == "" || qPass == "" || qServer == "" || qPortStr == "" {
+			http.Error(w, "Missing required query params: email, pass, server, port", http.StatusBadRequest)
+			return
+		}
+		port, err := strconv.Atoi(qPortStr)
+		if err != nil || port <= 0 {
+			http.Error(w, "Invalid port", http.StatusBadRequest)
+			return
+		}
+		config = EmailConfig{Email: qEmail, Password: qPass, SMTPHost: qServer, SMTPPort: port}
+	} else {
+		data.Domain = strings.ToLower(strings.TrimSpace(data.Domain))
+		var ok bool
+		config, ok = domainMap[data.Domain]
+		if !ok {
+			http.Error(w, "Unknown domain", http.StatusUnauthorized)
+			return
+		}
 	}
 
 	m := gomail.NewMessage()
 	m.SetHeader("From", config.Email)
 	m.SetHeader("To", config.Email) // you can change this to forward to another inbox
+	if strings.TrimSpace(data.Email) != "" {
+		m.SetHeader("Reply-To", data.Email)
+	}
 	m.SetHeader("Subject", data.Subject)
 	m.SetBody("text/plain", "Name: "+data.Name+"\nEmail: "+data.Email+"\n\n"+data.Message)
 
@@ -89,8 +288,72 @@ func enableCors(handler http.HandlerFunc) http.HandlerFunc {
 	}
 }
 
-func main() {
+// sendParamsHandler handles sending email with explicit SMTP parameters via query string.
-	http.HandleFunc("/send", enableCors(sendHandler))
+// Example:
-	log.Println("Server running on :8080")
+//   GET /[email protected]&pass=secret&server=smtp.example.com&port=465&[email protected]&[email protected]&subject=Hello&message=Hi
-	log.Fatal(http.ListenAndServe(":8080", nil))
+func sendParamsHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "GET only", http.StatusMethodNotAllowed)
+		return
+	}
+
+	q := r.URL.Query()
+	smtpEmail := strings.TrimSpace(q.Get("email"))
+	smtpPass := q.Get("pass")
+	smtpServer := strings.TrimSpace(q.Get("server"))
+	portStr := strings.TrimSpace(q.Get("port"))
+	to := strings.TrimSpace(q.Get("to"))
+	from := strings.TrimSpace(q.Get("from"))
+	subject := q.Get("subject")
+	message := q.Get("message")
+
+	if smtpEmail == "" || smtpPass == "" || smtpServer == "" || portStr == "" {
+		http.Error(w, "Missing required params: email, pass, server, port", http.StatusBadRequest)
+		return
+	}
+
+	port, err := strconv.Atoi(portStr)
+	if err != nil || port <= 0 {
+		http.Error(w, "Invalid port", http.StatusBadRequest)
+		return
+	}
+
+	if from == "" {
+		from = smtpEmail
+	}
+	if to == "" {
+		to = smtpEmail
+	}
+
+	m := gomail.NewMessage()
+	m.SetHeader("From", from)
+	m.SetHeader("To", to)
+	if subject == "" {
+		subject = "(no subject)"
+	}
+	m.SetHeader("Subject", subject)
+	m.SetBody("text/plain", message)
+
+	d := gomail.NewDialer(smtpServer, port, smtpEmail, smtpPass)
+	d.SSL = true
+
+	if err := d.DialAndSend(m); err != nil {
+		log.Println("Email send error:", err)
+		http.Error(w, "Failed to send email", http.StatusInternalServerError)
+		return
+	}
+
+    w.Header().Set("Content-Type", "application/json")
+    _ = json.NewEncoder(w).Encode(map[string]string{"status": "ok", "message": "Email sent successfully"})
 }
+
+// docsHandler serves a minimal JSON API description.
+
+func main() {
+    http.HandleFunc("/send", enableCors(sendHandler))
+    http.HandleFunc("/send-params", enableCors(sendParamsHandler))
+    http.HandleFunc("/", enableCors(rootHandler))
+    log.Println("Server running on :8080")
+    log.Fatal(http.ListenAndServe(":8080", nil))
+}
+