Add files via upload

banner.go

@@ -0,0 +1,111 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+	"os"
+	"sync"
+)
+
+type BannerStyle struct {
+	BackgroundColor string `json:"backgroundColor"`
+	TextColor       string `json:"textColor"`
+	FontSize        string `json:"fontSize"`
+	TextAlign       string `json:"textAlign"`
+	Padding         string `json:"padding"`
+	IsVisible       bool   `json:"isVisible"`
+}
+
+type BannerContent struct {
+	Text  string      `json:"text"`
+	Style BannerStyle `json:"style"`
+}
+
+var (
+	banner     BannerContent
+	bannerLock sync.RWMutex
+	bannerFile = "banner.json"
+)
+
+func init() {
+	// Initialize with default values
+	banner = BannerContent{
+		Text: "Důležité oznámení: Tento banner lze upravit v administraci.",
+		Style: BannerStyle{
+			BackgroundColor: "#f8d7da",
+			TextColor:       "#721c24",
+			FontSize:        "16px",
+			TextAlign:       "center",
+			Padding:         "10px",
+			IsVisible:       true,
+		},
+	}
+	loadBanner()
+}
+
+func loadBanner() {
+	if _, err := os.Stat(bannerFile); os.IsNotExist(err) {
+		saveBanner()
+		return
+	}
+
+	data, err := os.ReadFile(bannerFile)
+	if err != nil {
+		log.Printf("Error reading banner file: %v", err)
+		return
+	}
+
+	bannerLock.Lock()
+	defer bannerLock.Unlock()
+
+	if err := json.Unmarshal(data, &banner); err != nil {
+		log.Printf("Error parsing banner data: %v", err)
+	}
+}
+
+func saveBanner() error {
+	bannerLock.RLock()
+	defer bannerLock.RUnlock()
+
+	data, err := json.MarshalIndent(banner, "", "  ")
+	if err != nil {
+		return err
+	}
+
+	return os.WriteFile(bannerFile, data, 0644)
+}
+
+func GetBannerHandler(w http.ResponseWriter, r *http.Request) {
+	bannerLock.RLock()
+	defer bannerLock.RUnlock()
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(banner)
+}
+
+func UpdateBannerHandler(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var newBanner BannerContent
+	if err := json.NewDecoder(r.Body).Decode(&newBanner); err != nil {
+		http.Error(w, "Invalid request body", http.StatusBadRequest)
+		return
+	}
+
+	bannerLock.Lock()
+	banner = newBanner
+	err := saveBanner()
+	bannerLock.Unlock()
+
+	if err != nil {
+		http.Error(w, "Error saving banner", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(map[string]string{"status": "success"})
+}