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// Copyright 2020 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package models
import (
"context"
"crypto/md5"
"fmt"
"image/png"
"io"
"net/url"
"strconv"
"strings"
"code.gitea.io/gitea/models/db"
"code.gitea.io/gitea/modules/avatar"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/storage"
)
// CustomAvatarRelativePath returns repository custom avatar file path.
func (repo *Repository) CustomAvatarRelativePath() string {
return repo.Avatar
}
// generateRandomAvatar generates a random avatar for repository.
func (repo *Repository) generateRandomAvatar(e db.Engine) error {
idToString := fmt.Sprintf("%d", repo.ID)
seed := idToString
img, err := avatar.RandomImage([]byte(seed))
if err != nil {
return fmt.Errorf("RandomImage: %v", err)
}
repo.Avatar = idToString
if err := storage.SaveFrom(storage.RepoAvatars, repo.CustomAvatarRelativePath(), func(w io.Writer) error {
if err := png.Encode(w, img); err != nil {
log.Error("Encode: %v", err)
}
return err
}); err != nil {
return fmt.Errorf("Failed to create dir %s: %v", repo.CustomAvatarRelativePath(), err)
}
log.Info("New random avatar created for repository: %d", repo.ID)
if _, err := e.ID(repo.ID).Cols("avatar").NoAutoTime().Update(repo); err != nil {
return err
}
return nil
}
// RemoveRandomAvatars removes the randomly generated avatars that were created for repositories
func RemoveRandomAvatars(ctx context.Context) error {
return db.GetEngine(db.DefaultContext).
Where("id > 0").BufferSize(setting.Database.IterateBufferSize).
Iterate(new(Repository),
func(idx int, bean interface{}) error {
repository := bean.(*Repository)
select {
case <-ctx.Done():
return db.ErrCancelledf("before random avatars removed for %s", repository.FullName())
default:
}
stringifiedID := strconv.FormatInt(repository.ID, 10)
if repository.Avatar == stringifiedID {
return repository.DeleteAvatar()
}
return nil
})
}
// RelAvatarLink returns a relative link to the repository's avatar.
func (repo *Repository) RelAvatarLink() string {
return repo.relAvatarLink(db.GetEngine(db.DefaultContext))
}
func (repo *Repository) relAvatarLink(e db.Engine) string {
// If no avatar - path is empty
avatarPath := repo.CustomAvatarRelativePath()
if len(avatarPath) == 0 {
switch mode := setting.RepoAvatar.Fallback; mode {
case "image":
return setting.RepoAvatar.FallbackImage
case "random":
if err := repo.generateRandomAvatar(e); err != nil {
log.Error("generateRandomAvatar: %v", err)
}
default:
// default behaviour: do not display avatar
return ""
}
}
return setting.AppSubURL + "/repo-avatars/" + url.PathEscape(repo.Avatar)
}
// AvatarLink returns a link to the repository's avatar.
func (repo *Repository) AvatarLink() string {
return repo.avatarLink(db.GetEngine(db.DefaultContext))
}
// avatarLink returns user avatar absolute link.
func (repo *Repository) avatarLink(e db.Engine) string {
link := repo.relAvatarLink(e)
// we only prepend our AppURL to our known (relative, internal) avatar link to get an absolute URL
if strings.HasPrefix(link, "/") && !strings.HasPrefix(link, "//") {
return setting.AppURL + strings.TrimPrefix(link, setting.AppSubURL)[1:]
}
// otherwise, return the link as it is
return link
}
// UploadAvatar saves custom avatar for repository.
// FIXME: split uploads to different subdirs in case we have massive number of repos.
func (repo *Repository) UploadAvatar(data []byte) error {
m, err := avatar.Prepare(data)
if err != nil {
return err
}
newAvatar := fmt.Sprintf("%d-%x", repo.ID, md5.Sum(data))
if repo.Avatar == newAvatar { // upload the same picture
return nil
}
ctx, committer, err := db.TxContext()
if err != nil {
return err
}
defer committer.Close()
oldAvatarPath := repo.CustomAvatarRelativePath()
// Users can upload the same image to other repo - prefix it with ID
// Then repo will be removed - only it avatar file will be removed
repo.Avatar = newAvatar
if _, err := db.GetEngine(ctx).ID(repo.ID).Cols("avatar").Update(repo); err != nil {
return fmt.Errorf("UploadAvatar: Update repository avatar: %v", err)
}
if err := storage.SaveFrom(storage.RepoAvatars, repo.CustomAvatarRelativePath(), func(w io.Writer) error {
if err := png.Encode(w, *m); err != nil {
log.Error("Encode: %v", err)
}
return err
}); err != nil {
return fmt.Errorf("UploadAvatar %s failed: Failed to remove old repo avatar %s: %v", repo.RepoPath(), newAvatar, err)
}
if len(oldAvatarPath) > 0 {
if err := storage.RepoAvatars.Delete(oldAvatarPath); err != nil {
return fmt.Errorf("UploadAvatar: Failed to remove old repo avatar %s: %v", oldAvatarPath, err)
}
}
return committer.Commit()
}
// DeleteAvatar deletes the repos's custom avatar.
func (repo *Repository) DeleteAvatar() error {
// Avatar not exists
if len(repo.Avatar) == 0 {
return nil
}
avatarPath := repo.CustomAvatarRelativePath()
log.Trace("DeleteAvatar[%d]: %s", repo.ID, avatarPath)
ctx, committer, err := db.TxContext()
if err != nil {
return err
}
defer committer.Close()
repo.Avatar = ""
if _, err := db.GetEngine(ctx).ID(repo.ID).Cols("avatar").Update(repo); err != nil {
return fmt.Errorf("DeleteAvatar: Update repository avatar: %v", err)
}
if err := storage.RepoAvatars.Delete(avatarPath); err != nil {
return fmt.Errorf("DeleteAvatar: Failed to remove %s: %v", avatarPath, err)
}
return committer.Commit()
}
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