start refactor of media package

1 files changed, 133 insertions, 0 deletions

diff --git a/internal/media/image.go b/internal/media/image.go
new file mode 100644
index 000000000..f1cc03bb6
--- /dev/null
+++ b/internal/media/image.go
@@ -0,0 +1,133 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package media
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+	"github.com/superseriousbusiness/gotosocial/internal/uris"
+)
+
+func (mh *mediaHandler) processImage(data []byte, minAttachment *gtsmodel.MediaAttachment) (*gtsmodel.MediaAttachment, error) {
+	var clean []byte
+	var err error
+	var original *imageAndMeta
+	var small *imageAndMeta
+
+	contentType := minAttachment.File.ContentType
+
+	switch contentType {
+	case mimeJpeg, mimePng:
+		if clean, err = purgeExif(data); err != nil {
+			return nil, fmt.Errorf("error cleaning exif data: %s", err)
+		}
+		original, err = deriveImage(clean, contentType)
+		if err != nil {
+			return nil, fmt.Errorf("error parsing image: %s", err)
+		}
+	case mimeGif:
+		clean = data
+		original, err = deriveGif(clean, contentType)
+		if err != nil {
+			return nil, fmt.Errorf("error parsing gif: %s", err)
+		}
+	default:
+		return nil, errors.New("media type unrecognized")
+	}
+
+	small, err = deriveThumbnail(clean, contentType, 512, 512)
+	if err != nil {
+		return nil, fmt.Errorf("error deriving thumbnail: %s", err)
+	}
+
+	// now put it in storage, take a new id for the name of the file so we don't store any unnecessary info about it
+	extension := strings.Split(contentType, "/")[1]
+	newMediaID, err := id.NewRandomULID()
+	if err != nil {
+		return nil, err
+	}
+
+	originalURL := uris.GenerateURIForAttachment(minAttachment.AccountID, string(TypeAttachment), string(SizeOriginal), newMediaID, extension)
+	smallURL := uris.GenerateURIForAttachment(minAttachment.AccountID, string(TypeAttachment), string(SizeSmall), newMediaID, "jpeg") // all thumbnails/smalls are encoded as jpeg
+
+	// we store the original...
+	originalPath := fmt.Sprintf("%s/%s/%s/%s.%s", minAttachment.AccountID, TypeAttachment, SizeOriginal, newMediaID, extension)
+	if err := mh.storage.Put(originalPath, original.image); err != nil {
+		return nil, fmt.Errorf("storage error: %s", err)
+	}
+
+	// and a thumbnail...
+	smallPath := fmt.Sprintf("%s/%s/%s/%s.jpeg", minAttachment.AccountID, TypeAttachment, SizeSmall, newMediaID) // all thumbnails/smalls are encoded as jpeg
+	if err := mh.storage.Put(smallPath, small.image); err != nil {
+		return nil, fmt.Errorf("storage error: %s", err)
+	}
+
+	minAttachment.FileMeta.Original = gtsmodel.Original{
+		Width:  original.width,
+		Height: original.height,
+		Size:   original.size,
+		Aspect: original.aspect,
+	}
+
+	minAttachment.FileMeta.Small = gtsmodel.Small{
+		Width:  small.width,
+		Height: small.height,
+		Size:   small.size,
+		Aspect: small.aspect,
+	}
+
+	attachment := &gtsmodel.MediaAttachment{
+		ID:                newMediaID,
+		StatusID:          minAttachment.StatusID,
+		URL:               originalURL,
+		RemoteURL:         minAttachment.RemoteURL,
+		CreatedAt:         minAttachment.CreatedAt,
+		UpdatedAt:         minAttachment.UpdatedAt,
+		Type:              gtsmodel.FileTypeImage,
+		FileMeta:          minAttachment.FileMeta,
+		AccountID:         minAttachment.AccountID,
+		Description:       minAttachment.Description,
+		ScheduledStatusID: minAttachment.ScheduledStatusID,
+		Blurhash:          small.blurhash,
+		Processing:        2,
+		File: gtsmodel.File{
+			Path:        originalPath,
+			ContentType: contentType,
+			FileSize:    len(original.image),
+			UpdatedAt:   time.Now(),
+		},
+		Thumbnail: gtsmodel.Thumbnail{
+			Path:        smallPath,
+			ContentType: mimeJpeg, // all thumbnails/smalls are encoded as jpeg
+			FileSize:    len(small.image),
+			UpdatedAt:   time.Now(),
+			URL:         smallURL,
+			RemoteURL:   minAttachment.Thumbnail.RemoteURL,
+		},
+		Avatar: minAttachment.Avatar,
+		Header: minAttachment.Header,
+	}
+
+	return attachment, nil
+}