Izmene

cmd/ntech/main.go

@@ -1,7 +1,35 @@
 package main
 
-import "fmt"
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/go-chi/chi/v5"
+	"ntech/internal/config"
+)
 
 func main() {
-	fmt.Println("NTech pokrenut")
+	if config.JelPrvoPokretanje() {
+		config.PokreniSetup()
+		return
+	}
+
+	// normalno pokretanje
+	port := os.Getenv("NTECH_PORT")
+	if port == "" {
+		port = "8080"
+	}
+
+	r := chi.NewRouter()
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintln(w, "Zdravo iz NTech-a")
+	})
+
+	log.Printf("NTech pokrenut na portu %s", port)
+	err := http.ListenAndServe(":"+port, r)
+	if err != nil {
+		log.Fatalf("Greška: port %s je zauzet ili nije dostupan", port)
+	}
 }

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/ncruces/go-strftime v1.0.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/webview/webview_go v0.0.0-20240831120633-6173450d4dd6 // indirect
 	golang.org/x/sys v0.42.0 // indirect
 	modernc.org/libc v1.72.3 // indirect
 	modernc.org/mathutil v1.7.1 // indirect

go.sum

@@ -10,6 +10,8 @@ github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOF
 github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+github.com/webview/webview_go v0.0.0-20240831120633-6173450d4dd6 h1:VQpB2SpK88C6B5lPHTuSZKb2Qee1QWwiFlC5CKY4AW0=
+github.com/webview/webview_go v0.0.0-20240831120633-6173450d4dd6/go.mod h1:yE65LFCeWf4kyWD5re+h4XNvOHJEXOCOuJZ4v8l5sgk=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
 golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=

internal/config/firstrun.go

@@ -0,0 +1,62 @@
+package config
+
+import (
+	"fmt"
+	"net"
+	"os"
+)
+
+// lista portova koje proveravamo pri prvom pokretanju
+var kandidatPortovi = []int{8080, 3000, 8000, 9090}
+
+// proverava da li je port slobodan
+func JelPortSlobodan(port int) bool {
+	adresa := fmt.Sprintf(":%d", port)
+	listener, err := net.Listen("tcp", adresa)
+	if err != nil {
+		return false
+	}
+	listener.Close()
+	return true
+}
+
+// vraća prvi slobodan port sa liste kandidata
+func NadjiSlobodanPort() int {
+	for _, port := range kandidatPortovi {
+		if JelPortSlobodan(port) {
+			return port
+		}
+	}
+	// ako ni jedan nije slobodan, vraćamo 0
+	return 0
+}
+
+// proverava da li je ovo prvo pokretanje programa
+func JelPrvoPokretanje() bool {
+	_, err := os.Stat(".env")
+	return os.IsNotExist(err)
+}
+
+// PortStatus čuva informaciju o jednom portu
+type PortStatus struct {
+	Port     int  `json:"port"`
+	Slobodan bool `json:"slobodan"`
+}
+
+// StatusPortova vraća listu svih kandidat portova sa statusom
+func StatusPortova() []PortStatus {
+	rezultat := make([]PortStatus, len(kandidatPortovi))
+	for i, port := range kandidatPortovi {
+		rezultat[i] = PortStatus{
+			Port:     port,
+			Slobodan: JelPortSlobodan(port),
+		}
+	}
+	return rezultat
+}
+
+// SacuvajEnv upisuje izabrani port u .env fajl
+func SacuvajEnv(port int) error {
+	sadrzaj := fmt.Sprintf("NTECH_PORT=%d\n", port)
+	return os.WriteFile(".env", []byte(sadrzaj), 0600)
+}

internal/config/setup.go

@@ -0,0 +1,81 @@
+package config
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/webview/webview_go"
+)
+
+// PokreniSetup pokreće WebView prozor za prvo podešavanje
+func PokreniSetup() {
+	port := NadjiSlobodanPort()
+	if port == 0 {
+		log.Fatal("Greška: nije pronađen nijedan slobodan port")
+	}
+
+	adresa := fmt.Sprintf(":%d", port)
+	r := chi.NewRouter()
+
+	// serviraj setup stranicu
+	r.Get("/setup", func(w http.ResponseWriter, req *http.Request) {
+		portovi := StatusPortova()
+		podaci, err := json.Marshal(portovi)
+		if err != nil {
+			http.Error(w, "Greška", http.StatusInternalServerError)
+			return
+		}
+		sadrzaj, err := os.ReadFile("web/templates/setup/index.html")
+		if err != nil {
+			http.Error(w, "Greška", http.StatusInternalServerError)
+			return
+		}
+		html := strings.Replace(string(sadrzaj), "PORT_PODACI", string(podaci), 1)
+		w.Header().Set("Content-Type", "text/html")
+		fmt.Fprint(w, html)
+	})
+
+	// proverava da li je određeni port slobodan
+	r.Get("/setup/proveriPort", func(w http.ResponseWriter, req *http.Request) {
+		portStr := req.URL.Query().Get("port")
+		var port int
+		fmt.Sscanf(portStr, "%d", &port)
+		slobodan := JelPortSlobodan(port)
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]bool{"slobodan": slobodan})
+	})
+
+	// prima izabrani port i upisuje .env
+	r.Post("/setup/potvrdi", func(w http.ResponseWriter, req *http.Request) {
+		var telo struct {
+			Port int `json:"port"`
+		}
+		json.NewDecoder(req.Body).Decode(&telo)
+		err := SacuvajEnv(telo.Port)
+		if err != nil {
+			http.Error(w, "Greška pri čuvanju podešavanja", http.StatusInternalServerError)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(map[string]bool{"ok": true})
+	})
+
+	// pokreni server u pozadini
+	go func() {
+		log.Printf("Setup server pokrenut na portu %d", port)
+		http.ListenAndServe(adresa, r)
+	}()
+
+	// otvori WebView prozor
+	w := webview.New(false)
+	defer w.Destroy()
+	w.SetTitle("NTech — Konfiguracija")
+	w.SetSize(520, 580, 0)
+	w.Navigate(fmt.Sprintf("http://localhost:%d/setup", port))
+	w.Run()
+}

web/templates/setup/index.html

@@ -0,0 +1,220 @@
+<!doctype html>
+<html lang="sr">
+  <head>
+    <meta charset="UTF-8" />
+    <title>NTech — Konfiguracija</title>
+    <style>
+      * {
+        box-sizing: border-box;
+        margin: 0;
+        padding: 0;
+      }
+      body {
+        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+        background: #1a1a2e;
+        display: flex;
+        justify-content: center;
+        align-items: center;
+        height: 100vh;
+      }
+      .kartica {
+        background: #16213e;
+        padding: 2rem;
+        border-radius: 12px;
+        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
+        width: 410px;
+        border: 1px solid #0f3460;
+      }
+      .zaglavlje {
+        text-align: center;
+        margin-bottom: 1.3rem;
+      }
+      .zaglavlje h1 {
+        color: #f8e45c;
+        font-size: 1.4rem;
+        margin-bottom: 0.25rem;
+      }
+      .zaglavlje p {
+        color: #a0a0b0;
+        font-size: 0.85rem;
+      }
+      .sekcija-naslov {
+        color: #a0a0b0;
+        font-size: 0.8rem;
+        text-transform: uppercase;
+        letter-spacing: 0.05em;
+        margin-bottom: 0.5rem;
+      }
+      .port-opcija {
+        display: flex;
+        justify-content: space-between;
+        align-items: center;
+        padding: 0.5rem 0.75rem;
+        margin: 0.25rem 0;
+        border: 2px solid #0f3460;
+        border-radius: 8px;
+        cursor: pointer;
+        transition: all 0.2s;
+        color: #e0e0e0;
+      }
+      .port-opcija:hover {
+        border-color: #e94560;
+      }
+      .port-opcija.izabran {
+        border-color: #e94560;
+        background: rgba(233, 69, 96, 0.1);
+      }
+      .port-opcija.zauzet {
+        opacity: 0.5;
+        cursor: not-allowed;
+      }
+      .slobodan {
+        color: #2ecc71;
+        font-size: 0.85rem;
+      }
+      .zauzet-tekst {
+        color: #e74c3c;
+        font-size: 0.85rem;
+      }
+      .razdvojnik {
+        border: none;
+        border-top: 1px solid #0f3460;
+        margin: 1rem 0;
+      }
+      input[type="number"] {
+        width: 100%;
+        padding: 0.5rem 0.75rem;
+        background: #0f3460;
+        border: 2px solid #0f3460;
+        border-radius: 8px;
+        font-size: 0.9rem;
+        color: #e0e0e0;
+        outline: none;
+        transition: border-color 0.2s;
+      }
+      input[type="number"]:focus {
+        border-color: #e94560;
+      }
+      input[type="number"]::placeholder {
+        color: #606080;
+      }
+      button {
+        width: 100%;
+        padding: 0.55rem;
+        margin-top: 0.75rem;
+        background: #e94560;
+        color: white;
+        border: none;
+        border-radius: 8px;
+        font-size: 1rem;
+        font-weight: 600;
+        cursor: pointer;
+        transition: background 0.2s;
+      }
+      button:hover {
+        background: #c73652;
+      }
+      .poruka {
+        text-align: center;
+        padding: 1rem;
+        color: #2ecc71;
+        display: none;
+      }
+    </style>
+  </head>
+  <body>
+    <div class="kartica">
+      <div class="zaglavlje">
+        <h1>NTech</h1>
+        <p>Početna konfiguracija</p>
+      </div>
+
+      <p class="sekcija-naslov">Dostupni portovi</p>
+      <div id="portovi"></div>
+
+      <hr class="razdvojnik" />
+
+      <p class="sekcija-naslov">Ili unesite drugi port</p>
+      <input
+        type="number"
+        id="vlastitiPort"
+        min="1024"
+        max="65535"
+        placeholder="npr. 8080"
+      />
+
+      <button onclick="potvrdi()">Potvrdi i pokreni</button>
+      <div class="poruka" id="poruka">
+        NTech je konfigurisan! Možete zatvoriti ovaj prozor.
+      </div>
+    </div>
+
+    <script>
+      let izabranPort = null;
+      const portovi = PORT_PODACI;
+      const kontejner = document.getElementById("portovi");
+
+      portovi.forEach((p) => {
+        const div = document.createElement("div");
+        div.className = "port-opcija" + (p.slobodan ? "" : " zauzet");
+        div.innerHTML = `
+                <span>Port ${p.port}</span>
+                <span class="${p.slobodan ? "slobodan" : "zauzet-tekst"}">
+                    ${p.slobodan ? "✓ slobodan" : "✗ zauzet"}
+                </span>
+            `;
+        if (p.slobodan) {
+          div.onclick = () => {
+            document
+              .querySelectorAll(".port-opcija")
+              .forEach((el) => el.classList.remove("izabran"));
+            div.classList.add("izabran");
+            izabranPort = p.port;
+            document.getElementById("vlastitiPort").value = "";
+          };
+          if (izabranPort === null) {
+            div.classList.add("izabran");
+            izabranPort = p.port;
+          }
+        }
+        kontejner.appendChild(div);
+      });
+
+      function potvrdi() {
+        const vlastiti = document.getElementById("vlastitiPort").value;
+        const port = vlastiti ? parseInt(vlastiti) : izabranPort;
+
+        if (!port) {
+          alert("Molimo izaberite ili unesite port.");
+          return;
+        }
+
+        if (vlastiti && (port < 1024 || port > 65535)) {
+          alert("Port mora biti između 1024 i 65535.");
+          return;
+        }
+
+        fetch("/setup/proveriPort?port=" + port)
+          .then((r) => r.json())
+          .then((d) => {
+            if (!d.slobodan) {
+              alert("Port " + port + " je zauzet. Molimo izaberite drugi.");
+              return;
+            }
+            fetch("/setup/potvrdi", {
+              method: "POST",
+              headers: { "Content-Type": "application/json" },
+              body: JSON.stringify({ port: port }),
+            })
+              .then((r) => r.json())
+              .then((d) => {
+                if (d.ok) {
+                  document.getElementById("poruka").style.display = "block";
+                  document.querySelector("button").disabled = true;
+                }
+              });
+          });
+      }
+    </script>
+  </body>
+</html>