Initial commit

app/internal/utils/render.go

@@ -0,0 +1,69 @@
+package utils
+
+import (
+	"bytes"
+	"html/template"
+	"net/http"
+	"path/filepath"
+)
+
+// Helper functions for templates
+var templateFuncs = template.FuncMap{
+	"add": func(a, b int) int {
+		return a + b
+	},
+	"sub": func(a, b int) int {
+		return a - b
+	},
+	"eq": func(a, b interface{}) bool {
+		return a == b
+	},
+	"pageRange": func(currentPage, totalPages int) []int {
+		// Generate page numbers to show (max 7 pages)
+		start := currentPage - 3
+		end := currentPage + 3
+
+		if start < 1 {
+			end += 1 - start
+			start = 1
+		}
+		if end > totalPages {
+			start -= end - totalPages
+			end = totalPages
+		}
+		if start < 1 {
+			start = 1
+		}
+
+		var pages []int
+		for i := start; i <= end; i++ {
+			pages = append(pages, i)
+		}
+		return pages
+	},
+}
+
+func Render(w http.ResponseWriter, tmpl string, data interface{}) {
+	// Paths for layout + page templates
+	layout := filepath.Join("/Users/mannpatel/Desktop/Poll-system/app/internal/templates/", "layout.html")
+	page := filepath.Join("/Users/mannpatel/Desktop/Poll-system/app/internal/templates/", tmpl)
+
+	// Parse files with helper functions
+	tmpls, err := template.New("").Funcs(templateFuncs).ParseFiles(layout, page)
+	if err != nil {
+		http.Error(w, "Template parsing error: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// Render to buffer first (catch errors before writing response)
+	var buf bytes.Buffer
+	err = tmpls.ExecuteTemplate(&buf, "layout", data)
+	if err != nil {
+		http.Error(w, "Template execution error: "+err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// Write final HTML to response
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	buf.WriteTo(w)
+}