Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/channels/app/brand.go

@@ -0,0 +1,83 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package app
+
+import (
+	"bytes"
+	"mime/multipart"
+	"net/http"
+	"time"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+)
+
+const (
+	BrandFilePath = "brand/"
+	BrandFileName = "image.png"
+)
+
+func (a *App) SaveBrandImage(imageData *multipart.FileHeader) *model.AppError {
+	if *a.Config().FileSettings.DriverName == "" {
+		return model.NewAppError("SaveBrandImage", "api.admin.upload_brand_image.storage.app_error", nil, "", http.StatusNotImplemented)
+	}
+
+	file, err := imageData.Open()
+	if err != nil {
+		return model.NewAppError("SaveBrandImage", "brand.save_brand_image.open.app_error", nil, "", http.StatusBadRequest).Wrap(err)
+	}
+	defer file.Close()
+
+	if err = checkImageLimits(file, *a.Config().FileSettings.MaxImageResolution); err != nil {
+		return model.NewAppError("SaveBrandImage", "brand.save_brand_image.check_image_limits.app_error", nil, "", http.StatusBadRequest).Wrap(err)
+	}
+
+	img, _, err := a.ch.imgDecoder.Decode(file)
+	if err != nil {
+		return model.NewAppError("SaveBrandImage", "brand.save_brand_image.decode.app_error", nil, "", http.StatusBadRequest).Wrap(err)
+	}
+
+	buf := new(bytes.Buffer)
+	err = a.ch.imgEncoder.EncodePNG(buf, img)
+	if err != nil {
+		return model.NewAppError("SaveBrandImage", "brand.save_brand_image.encode.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
+	}
+
+	t := time.Now()
+	a.MoveFile(BrandFilePath+BrandFileName, BrandFilePath+t.Format("2006-01-02T15:04:05")+".png")
+
+	if _, err := a.WriteFile(buf, BrandFilePath+BrandFileName); err != nil {
+		return model.NewAppError("SaveBrandImage", "brand.save_brand_image.save_image.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
+	}
+
+	return nil
+}
+
+func (a *App) GetBrandImage() ([]byte, *model.AppError) {
+	if *a.Config().FileSettings.DriverName == "" {
+		return nil, model.NewAppError("GetBrandImage", "api.admin.get_brand_image.storage.app_error", nil, "", http.StatusNotImplemented)
+	}
+
+	img, err := a.ReadFile(BrandFilePath + BrandFileName)
+	if err != nil {
+		return nil, err
+	}
+
+	return img, nil
+}
+
+func (a *App) DeleteBrandImage() *model.AppError {
+	filePath := BrandFilePath + BrandFileName
+
+	fileExists, err := a.FileExists(filePath)
+
+	if err != nil {
+		return err
+	}
+
+	if !fileExists {
+		return model.NewAppError("DeleteBrandImage", "api.admin.delete_brand_image.storage.not_found", nil, "", http.StatusNotFound)
+	}
+
+	return a.RemoveFile(filePath)
+}