You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: page_fetch.go
    path of file: ./repos/Artalk/server/handler
    
    the code of the file until where you have to start completion: package handler

import (
	"github.com/ArtalkJS/Artalk/internal/core"
	"github.com/ArtalkJS/Artalk/internal/entity"
	"github.com/ArtalkJS/Artalk/internal/i18n"
	"github.com/ArtalkJS/Artalk/server/common"
	"github.com/gofiber/fiber/v2"
)

type ResponsePageFetch struct {
	entity.CookedPage
}

// @Id           FetchPage
// @Summar
    
func PageFetch(app *core.App, router fiber.Router) {
	router.Post("/pages/:id/fetch", common.AdminGuard(app, func(c *fiber.Ctx) error {
		id, _ := c.ParamsInt("id")

		page := app.Dao().FindPageByID(uint(id))
		if page.IsEmpty() {
			return common.RespError(c, 404, i18n.T("{{name}} not found", Map{"name": i18n.T("Page")}))
		}

		if err := app.Dao().FetchPageFromURL(&page); err != nil {
			return common.RespError(c, 500, i18n.T("Page fetch failed")+": "+err.Error())
		}

		return common.RespData(c, ResponsePageFetch{
			CookedPage: app.Dao().CookPage(&page),
		})
	}))
}