1 files changed, 191 insertions, 2 deletions
diff --git a/internal/media/media.go b/internal/media/media.go
index 644edb8e4..d25fd258d 100644
--- a/internal/media/media.go
+++ b/internal/media/media.go
@@ -18,6 +18,195 @@
 
 package media
 
-// API provides an interface for parsing, storing, and retrieving media objects like photos and videos
-type API interface {
+import (
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/db/model"
+	"github.com/superseriousbusiness/gotosocial/internal/storage"
+)
+
+// MediaHandler provides an interface for parsing, storing, and retrieving media objects like photos, videos, and gifs.
+type MediaHandler interface {
+	// SetHeaderOrAvatarForAccountID takes a new header image for an account, checks it out, removes exif data from it,
+	// puts it in whatever storage backend we're using, sets the relevant fields in the database for the new image,
+	// and then returns information to the caller about the new header.
+	SetHeaderOrAvatarForAccountID(img []byte, accountID string, headerOrAvi string) (*model.MediaAttachment, error)
+}
+
+type mediaHandler struct {
+	config  *config.Config
+	db      db.DB
+	storage storage.Storage
+	log     *logrus.Logger
+}
+
+func New(config *config.Config, database db.DB, storage storage.Storage, log *logrus.Logger) MediaHandler {
+	return &mediaHandler{
+		config:  config,
+		db:      database,
+		storage: storage,
+		log:     log,
+	}
+}
+
+// HeaderInfo wraps the urls at which a Header and a StaticHeader is available from the server.
+type HeaderInfo struct {
+	// URL to the header
+	Header string
+	// Static version of the above (eg., a path to a still image if the header is a gif)
+	HeaderStatic string
+}
+
+/*
+	INTERFACE FUNCTIONS
+*/
+
+func (mh *mediaHandler) SetHeaderOrAvatarForAccountID(img []byte, accountID string, headerOrAvi string) (*model.MediaAttachment, error) {
+	l := mh.log.WithField("func", "SetHeaderForAccountID")
+
+	if headerOrAvi != "header" && headerOrAvi != "avatar" {
+		return nil, errors.New("header or avatar not selected")
+	}
+
+	// make sure we have an image we can handle
+	contentType, err := parseContentType(img)
+	if err != nil {
+		return nil, err
+	}
+	if !supportedImageType(contentType) {
+		return nil, fmt.Errorf("%s is not an accepted image type", contentType)
+	}
+
+	if len(img) == 0 {
+		return nil, fmt.Errorf("passed reader was of size 0")
+	}
+	l.Tracef("read %d bytes of file", len(img))
+
+	// process it
+	ma, err := mh.processHeaderOrAvi(img, contentType, headerOrAvi, accountID)
+	if err != nil {
+		return nil, fmt.Errorf("error processing %s: %s", headerOrAvi, err)
+	}
+
+	// set it in the database
+	if err := mh.db.SetHeaderOrAvatarForAccountID(ma, accountID); err != nil {
+		return nil, fmt.Errorf("error putting %s in database: %s", headerOrAvi, err)
+	}
+
+	return ma, nil
+}
+
+/*
+	HELPER FUNCTIONS
+*/
+
+func (mh *mediaHandler) processHeaderOrAvi(imageBytes []byte, contentType string, headerOrAvi string, accountID string) (*model.MediaAttachment, error) {
+	var isHeader bool
+	var isAvatar bool
+
+	switch headerOrAvi {
+	case "header":
+		isHeader = true
+	case "avatar":
+		isAvatar = true
+	default:
+		return nil, errors.New("header or avatar not selected")
+	}
+
+	var clean []byte
+	var err error
+
+	switch contentType {
+	case "image/jpeg":
+		if clean, err = purgeExif(imageBytes); err != nil {
+			return nil, fmt.Errorf("error cleaning exif data: %s", err)
+		}
+	case "image/png":
+		if clean, err = purgeExif(imageBytes); err != nil {
+			return nil, fmt.Errorf("error cleaning exif data: %s", err)
+		}
+	case "image/gif":
+		clean = imageBytes
+	default:
+		return nil, errors.New("media type unrecognized")
+	}
+
+	original, err := deriveImage(clean, contentType)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing image: %s", err)
+	}
+
+	small, err := deriveThumbnail(clean, contentType)
+	if err != nil {
+		return nil, fmt.Errorf("error deriving thumbnail: %s", err)
+	}
+
+	// now put it in storage, take a new uuid for the name of the file so we don't store any unnecessary info about it
+	extension := strings.Split(contentType, "/")[1]
+	newMediaID := uuid.NewString()
+
+	base := fmt.Sprintf("%s://%s%s", mh.config.StorageConfig.ServeProtocol, mh.config.StorageConfig.ServeHost, mh.config.StorageConfig.ServeBasePath)
+
+	// we store the original...
+	originalPath := fmt.Sprintf("%s/%s/%s/original/%s.%s", base, accountID, headerOrAvi, newMediaID, extension)
+	if err := mh.storage.StoreFileAt(originalPath, original.image); err != nil {
+		return nil, fmt.Errorf("storage error: %s", err)
+	}
+	// and a thumbnail...
+	smallPath := fmt.Sprintf("%s/%s/%s/small/%s.%s", base, accountID, headerOrAvi, newMediaID, extension)
+	if err := mh.storage.StoreFileAt(smallPath, small.image); err != nil {
+		return nil, fmt.Errorf("storage error: %s", err)
+	}
+
+	ma := &model.MediaAttachment{
+		ID:        newMediaID,
+		StatusID:  "",
+		RemoteURL: "",
+		CreatedAt: time.Now(),
+		UpdatedAt: time.Now(),
+		Type:      model.FileTypeImage,
+		FileMeta: model.FileMeta{
+			Original: model.Original{
+				Width:  original.width,
+				Height: original.height,
+				Size:   original.size,
+				Aspect: original.aspect,
+			},
+			Small: model.Small{
+				Width:  small.width,
+				Height: small.height,
+				Size:   small.size,
+				Aspect: small.aspect,
+			},
+		},
+		AccountID:         accountID,
+		Description:       "",
+		ScheduledStatusID: "",
+		Blurhash:          original.blurhash,
+		Processing:        2,
+		File: model.File{
+			Path:        originalPath,
+			ContentType: contentType,
+			FileSize:    len(original.image),
+			UpdatedAt:   time.Now(),
+		},
+		Thumbnail: model.Thumbnail{
+			Path:        smallPath,
+			ContentType: contentType,
+			FileSize:    len(small.image),
+			UpdatedAt:   time.Now(),
+			RemoteURL:   "",
+		},
+		Avatar: isAvatar,
+		Header: isHeader,
+	}
+
+	return ma, nil
 }