add pagination

src/main.go

@@ -2,9 +2,11 @@ package main
 
 import (
 	"fmt"
+	"html/template"
 	"log"
 	"os"
 	"path/filepath"
+	"strconv"
 
 	"github.com/gin-gonic/gin"
 	"golang.org/x/crypto/bcrypt"
@@ -31,6 +33,10 @@ func main() {
 
 	router := gin.Default()
 	router.MaxMultipartMemory = 10 << 30
+	router.SetFuncMap(template.FuncMap{
+		"add": func(a, b int) int { return a + b },
+		"sub": func(a, b int) int { return a - b },
+	})
 	router.LoadHTMLGlob("templates/*")
 	var staticPath = gin.Dir("./static", false)
 	fmt.Printf("Static path: %v\n", staticPath)
@@ -49,8 +55,29 @@ func main() {
 
 	admin.GET("/", func(c *gin.Context) {
 		var files []FileRecord
-		db.Order("created_at desc").Find(&files)
-		c.HTML(200, "admin.html", gin.H{"Files": files})
+
+		// Pagination parameters
+		perPage := 20
+		page := 1
+		if p := c.Query("page"); p != "" {
+			if v, err := strconv.Atoi(p); err == nil && v > 0 {
+				page = v
+			}
+		}
+
+		var total int64
+		db.Model(&FileRecord{}).Count(&total)
+
+		totalPages := int((total + int64(perPage) - 1) / int64(perPage)) // ceiling division
+
+		offset := (page - 1) * perPage
+		db.Order("created_at desc").Limit(perPage).Offset(offset).Find(&files)
+
+		c.HTML(200, "admin.html", gin.H{
+			"Files":      files,
+			"Page":       page,
+			"TotalPages": totalPages,
+		})
 	})
 
 	admin.POST("/delete/:id", func(c *gin.Context) {