repo: support avatars (#5221)

* First code for repository avatars

* Last code for repository avatars

- add new option for repo avatars location on filesystem
- add route catch in web
- add new fields to repo model
- add migration
- update settings handlers
- update repo header template

* Update locale messages

* Add repo avatars to home page

* Add repo avatars to organization right panel

* Show repo avatars in repo list

* Remove AvatarEamil field, remove Gravatar support, use generic locale messages

* Fix migration

* Fix seed and not used tool

* Revert public css changes, add them to less files

* Latest lessc (2.6.0) don't put result into file but output to stdout

So redirect output to file

* Simplify things:

- migration don't needed, and table changes too
- just upload file to repo avatar storage
- or generate random image

* Fix repo image seed - name not unique

* Get rid of not needed model fields

* Class value is enough, remove height attribute

* Don't generate random avatar for repository

- use html and semantic ui icons if no avatar found

* Update styles and templates for repo

- use repo icon as default avatar
- use globe icon for public repos
- add micro style for repo avatars at dashboard

* Remvoe redundant empty line

* Fix nl2br filter - must return string

* Fix css style for micro-repo-avatar in dashboard list

* Remove `|len`, works fine w/o it.

* Update after review 2:

- use static route for repository avatar
- format images settings block in settings

* Update after review 2:

- no random avatar for repo

* Update after review 2:

- no random avatar for repo 2
- update imports
- update UploadAvatar* functions

* Update after review 2:

- update templates

* Fix trace call

* Remove unused immport since we use static route for repo avatars.

1 files changed, 62 insertions, 0 deletions

diff --git a/models/repo.go b/models/repo.go
index b15b0175..3a9f388b 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -15,10 +15,14 @@ import (
 	"sort"
 	"strings"
 	"time"
+	"image"
+	_ "image/jpeg"
+	"image/png"
 
 	"github.com/Unknwon/cae/zip"
 	"github.com/Unknwon/com"
 	"github.com/go-xorm/xorm"
+	"github.com/nfnt/resize"
 	"github.com/mcuadros/go-version"
 	log "gopkg.in/clog.v1"
 	"gopkg.in/ini.v1"
@@ -27,6 +31,7 @@ import (
 	api "github.com/gogs/go-gogs-client"
 
 	"github.com/gogs/gogs/models/errors"
+	"github.com/gogs/gogs/pkg/avatar"
 	"github.com/gogs/gogs/pkg/bindata"
 	"github.com/gogs/gogs/pkg/markup"
 	"github.com/gogs/gogs/pkg/process"
@@ -284,6 +289,61 @@ func (repo *Repository) HTMLURL() string {
 	return setting.AppURL + repo.FullName()
 }
 
+// CustomAvatarPath returns repository custom avatar file path.
+func (repo *Repository) CustomAvatarPath() string {
+	return filepath.Join(setting.RepositoryAvatarUploadPath, com.ToStr(repo.ID))
+}
+
+// RelAvatarLink returns relative avatar link to the site domain,
+// which includes app sub-url as prefix.
+// Since Gravatar support not needed here - just check for image path.
+func (repo *Repository) RelAvatarLink() string {
+	defaultImgUrl := ""
+	if !com.IsExist(repo.CustomAvatarPath()) {
+		return defaultImgUrl
+	}
+	return setting.AppSubURL + "/repo-avatars/" + com.ToStr(repo.ID)
+}
+
+// AvatarLink returns user avatar absolute link.
+func (repo *Repository) AvatarLink() string {
+	link := repo.RelAvatarLink()
+	if link[0] == '/' && link[1] != '/' {
+		return setting.AppURL + strings.TrimPrefix(link, setting.AppSubURL)[1:]
+	}
+	return link
+}
+
+// UploadAvatar saves custom avatar for repository.
+// FIXME: split uploads to different subdirs
+// in case we have massive number of repositories.
+func (repo *Repository) UploadAvatar(data []byte) error {
+	img, _, err := image.Decode(bytes.NewReader(data))
+	if err != nil {
+		return fmt.Errorf("Decode: %v", err)
+	}
+
+	m := resize.Resize(avatar.AVATAR_SIZE, avatar.AVATAR_SIZE, img, resize.NearestNeighbor)
+	os.MkdirAll(setting.RepositoryAvatarUploadPath, os.ModePerm)
+	fw, err := os.Create(repo.CustomAvatarPath())
+	if err != nil {
+		return fmt.Errorf("Create: %v", err)
+	}
+	defer fw.Close()
+
+	if err = png.Encode(fw, m); err != nil {
+		return fmt.Errorf("Encode: %v", err)
+	}
+
+	return nil
+}
+
+// DeleteAvatar deletes the repository custom avatar.
+func (repo *Repository) DeleteAvatar() error {
+	log.Trace("DeleteAvatar [%d]: %s", repo.ID, repo.CustomAvatarPath())
+	return os.Remove(repo.CustomAvatarPath())
+}
+
 // This method assumes following fields have been assigned with valid values:
 // Required - BaseRepo (if fork)
 // Arguments that are allowed to be nil: permission
@@ -312,6 +372,8 @@ func (repo *Repository) APIFormat(permission *api.Permission, user ...*User) *ap
 		Created:       repo.Created,
 		Updated:       repo.Updated,
 		Permissions:   permission,
+// Reserved for go-gogs-client change
+//		AvatarUrl:     repo.AvatarLink(),
 	}
 	if repo.IsFork {
 		p := &api.Permission{Pull: true}