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package handlers
import (
"encoding/json"
"html/template"
"log"
"net/http"
)
// noCacheHeaders sets headers to prevent browser caching
func noCacheHeaders(w http.ResponseWriter) {
w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
w.Header().Set("Pragma", "no-cache")
w.Header().Set("Expires", "0")
}
// JSONResponse writes data as JSON with appropriate headers
func JSONResponse(w http.ResponseWriter, data interface{}) {
w.Header().Set("Content-Type", "application/json")
noCacheHeaders(w)
_ = json.NewEncoder(w).Encode(data)
}
// JSONError writes an error response as JSON
func JSONError(w http.ResponseWriter, status int, msg string, err error) {
if err != nil {
log.Printf("Error: %s: %v", msg, err)
}
http.Error(w, msg, status)
}
// HTMLResponse renders an HTML template
func HTMLResponse(w http.ResponseWriter, tmpl *template.Template, name string, data interface{}) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
noCacheHeaders(w)
if err := tmpl.ExecuteTemplate(w, name, data); err != nil {
http.Error(w, "Failed to render template", http.StatusInternalServerError)
log.Printf("Error rendering template %s: %v", name, err)
}
}
// HTMLString writes an HTML string directly
func HTMLString(w http.ResponseWriter, html string) {
w.Header().Set("Content-Type", "text/html")
_, _ = w.Write([]byte(html))
}
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