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package image
import (
"fmt"
"io/ioutil"
"log"
"net/http"
"path"
"time"
gonanoid "github.com/matoous/go-nanoid"
"github.com/pkg/errors"
"go.ofmax.li/tmpl"
)
// Servicer image management
type Servicer interface {
NewID() (string, error)
AddFile(extension string, meta *PostMeta, fileBytes []byte) (string, string, error)
GetFile(fileUrl string) (*PostMeta, error)
Render(w http.ResponseWriter, templateName string, data interface{}) error
}
// NewService new image service
func NewService(repo Repo, storagePath string, renderer *tmpl.HTML) *Service {
return &Service{repo,
storagePath,
renderer,
}
}
// Service a container for working with images
type Service struct {
db Repo
storagePath string
tmpl *tmpl.HTML
}
// Render renders templates
func (is *Service) Render(w http.ResponseWriter, templateName string, data interface{}) error {
return is.tmpl.Render(w, templateName, data)
}
// NewID create an uniqueish ID
func (is *Service) NewID() (string, error) {
return gonanoid.Nanoid()
}
// AddFile writes to disk, writes meta to db
func (is *Service) AddFile(extension string, postMeta *PostMeta, fileBytes []byte) (string, string, error) {
fileID, err := is.NewID()
if err != nil {
return "", "", errors.Wrap(err, "generated id for fileID failed")
}
fileName := fmt.Sprintf("%s.%s", fileID, extension)
filePath := path.Join(is.storagePath, fileName)
if err := ioutil.WriteFile(filePath, fileBytes, 0750); err != nil {
log.Fatal(err)
return "", "", errors.Wrap(err, "couldn't write image file")
}
postID, err := is.NewID()
if err != nil {
return "", "", errors.Wrap(err, "generating postid for uuid")
}
t := time.Now().UTC()
postMeta.FilePath = fileName
postMeta.CreatedAt = t.Format(time.RFC3339)
is.db.AddNewFile(postID, postMeta, 946080000)
if err := is.db.AddNewFile(postID, postMeta, 946080000); err != nil {
log.Fatal(err)
return "", "", errors.Wrap(err, "couldn't write to redis")
}
return fileName, postID, nil
}
// GetFile fetch file from db interface
func (is *Service) GetFile(fileUrl string) (*PostMeta, error) {
result, err := is.db.GetFile(fileUrl)
if err != nil {
return &PostMeta{}, err
}
return result, err
}
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