Repository avatars (#6986)

* Repository avatars

- first variant of code from old work for gogs
- add migration 87
- add new option in app.ini
- add en-US locale string
- add new class in repository.less

* Add changed index.css, remove unused template name

* Update en-us doc about configuration options

* Add comments to new functions, add new option to docker app.ini

* Add comment for lint

* Remove variable, not needed

* Fix formatting

* Update swagger api template

* Check if avatar exists

* Fix avatar link/path checks

* Typo

* TEXT column can't have a default value

* Fixes:

- remove old avatar file on upload
- use ID in name of avatar file - users may upload same files
- add simple tests

* Fix fmt check

* Generate PNG instead of "static" GIF

* More informative comment

* Fix error message

* Update avatar upload checks:

- add file size check
- add new option
- update config docs
- add new string to en-us locale

* Fixes:

- use FileHEader field for check file size
- add new test - upload big image

* Fix formatting

* Update comments

* Update log message

* Removed wrong style - not needed

* Use Sync2 to migrate

* Update repos list view

- bigger avatar
- fix html blocks alignment

* A little adjust avatar size

* Use small icons for explore/repo list

* Use new cool avatar preparation func by @lafriks

* Missing changes for new function

* Remove unused import, move imports

* Missed new option definition in app.ini

Add file size check in user/profile avatar upload

* Use smaller field length for Avatar

* Use session to update repo DB data, update DeleteAvatar - use session too

* Fix err variable definition

* As suggested @lafriks - return as soon as possible, code readability

routers/repo/setting.go

@@ -7,11 +7,14 @@ package repo
 
 import (
 	"errors"
+	"fmt"
+	"io/ioutil"
 	"net/url"
 	"regexp"
 	"strings"
 	"time"
 
+	"github.com/Unknwon/com"
 	"mvdan.cc/xurls/v2"
 
 	"code.gitea.io/gitea/models"
@@ -727,3 +730,59 @@ func init() {
 		panic(err)
 	}
 }
+
+// UpdateAvatarSetting update repo's avatar
+func UpdateAvatarSetting(ctx *context.Context, form auth.AvatarForm) error {
+	ctxRepo := ctx.Repo.Repository
+
+	if form.Avatar == nil {
+		// No avatar is uploaded and we not removing it here.
+		// No random avatar generated here.
+		// Just exit, no action.
+		if !com.IsFile(ctxRepo.CustomAvatarPath()) {
+			log.Trace("No avatar was uploaded for repo: %d. Default icon will appear instead.", ctxRepo.ID)
+		}
+		return nil
+	}
+
+	r, err := form.Avatar.Open()
+	if err != nil {
+		return fmt.Errorf("Avatar.Open: %v", err)
+	}
+	defer r.Close()
+
+	if form.Avatar.Size > setting.AvatarMaxFileSize {
+		return errors.New(ctx.Tr("settings.uploaded_avatar_is_too_big"))
+	}
+
+	data, err := ioutil.ReadAll(r)
+	if err != nil {
+		return fmt.Errorf("ioutil.ReadAll: %v", err)
+	}
+	if !base.IsImageFile(data) {
+		return errors.New(ctx.Tr("settings.uploaded_avatar_not_a_image"))
+	}
+	if err = ctxRepo.UploadAvatar(data); err != nil {
+		return fmt.Errorf("UploadAvatar: %v", err)
+	}
+	return nil
+}
+
+// SettingsAvatar save new POSTed repository avatar
+func SettingsAvatar(ctx *context.Context, form auth.AvatarForm) {
+	form.Source = auth.AvatarLocal
+	if err := UpdateAvatarSetting(ctx, form); err != nil {
+		ctx.Flash.Error(err.Error())
+	} else {
+		ctx.Flash.Success(ctx.Tr("repo.settings.update_avatar_success"))
+	}
+	ctx.Redirect(ctx.Repo.RepoLink + "/settings")
+}
+
+// SettingsDeleteAvatar delete repository avatar
+func SettingsDeleteAvatar(ctx *context.Context) {
+	if err := ctx.Repo.Repository.DeleteAvatar(); err != nil {
+		ctx.Flash.Error(fmt.Sprintf("DeleteAvatar: %v", err))
+	}
+	ctx.Redirect(ctx.Repo.RepoLink + "/settings")
+}