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: zip.go
    path of file: ./repos/photoprism/internal/api
    
    the code of the file until where you have to start completion: package api

import (
	"archive/zip"
	"fmt"
	"io"
	"net/http"
	"os"
	"path"
	"path/filepath"
	"strings"
	"time"

	"github.com/gin-gonic/gin"

	"github.com/photoprism/photoprism/internal/acl"
	"github.com/photoprism/photoprism/internal/form"
	"github.com/photoprism/photoprism/internal/get"
	"github.com/photoprism/photoprism/internal/i18n"
	"github.com/photoprism/photoprism/internal/photoprism"
	"github.com/photoprism/photoprism/internal/query"
	"github.com/photoprism/photoprism/pkg/clean"
	"github.com/photoprism/photoprism/pkg/fs"
	"github.com/photoprism/photoprism/pkg/rnd"
)

// ZipCreate creates a zip file archive for download.
//
// POST /api/v1/zip
func ZipCreate(router *gin.RouterGroup) {
	router.POST("/zip", func(c *gin.Context) {
		s := Auth(c, acl.ResourcePhotos, acl.ActionDownload)

		if s.Abort(c) {
			return
		}

		conf := get.Config()

		if !conf.Settings().Features.Download {
			AbortFeatureDisabled(c)
			return
		}

		var f form.Selection
		start := time.Now()

		if err := c.BindJSON(&f); err != nil {
			AbortBadRe
    
func ZipDownload(router *gin.RouterGroup) {
	router.GET("/zip/:filename", func(c *gin.Context) {
		if InvalidDownloadToken(c) {
			log.Errorf("zip: %s", c.AbortWithError(http.StatusForbidden, fmt.Errorf("invalid download token")))
			return
		}

		conf := get.Config()
		zipBaseName := clean.FileName(filepath.Base(c.Param("filename")))
		zipPath := path.Join(conf.TempPath(), "zip")
		zipFileName := path.Join(zipPath, zipBaseName)

		if !fs.FileExists(zipFileName) {
			log.Errorf("zip: %s", c.AbortWithError(http.StatusNotFound, fmt.Errorf("%s not found", clean.Log(zipFileName))))
			return
		}

		defer func(fileName, baseName string) {
			log.Debugf("zip: %s has been downloaded", clean.Log(baseName))

			// Wait a moment before deleting the zip file, just to be sure:
			// https://github.com/photoprism/photoprism/issues/2532
			time.Sleep(time.Second)

			// Remove the zip file to free up disk space.
			if err := os.Remove(fileName); err != nil {
				log.Warnf("zip: failed deleting %s (%s)", clean.Log(fileName), err)
			} else {
				log.Debugf("zip: deleted %s", clean.Log(baseName))
			}
		}(zipFileName, zipBaseName)

		log.Debugf("zip: submitting %s", clean.Log(zipBaseName))

		c.FileAttachment(zipFileName, zipBaseName)
	})
}