gotosocial/internal/media/processingemoji.go

305 lines
8.7 KiB
Go

// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// 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 (
"context"
"os"
errorsv2 "codeberg.org/gruf/go-errors/v2"
"codeberg.org/gruf/go-runners"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/storage"
"github.com/superseriousbusiness/gotosocial/internal/uris"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// ProcessingEmoji represents an emoji currently processing. It exposes
// various functions for retrieving data from the process.
type ProcessingEmoji struct {
emoji *gtsmodel.Emoji // processing emoji details
instAccID string // instance account ID
newPathID string // new emoji path ID to use when being refreshed
dataFn DataFunc // load-data function, returns media stream
done bool // done is set when process finishes with non ctx canceled type error
proc runners.Processor // proc helps synchronize only a singular running processing instance
err error // error stores permanent error value when done
mgr *Manager // mgr instance (access to db / storage)
}
// ID returns the ID of the underlying emoji.
func (p *ProcessingEmoji) ID() string {
return p.emoji.ID // immutable, safe outside mutex.
}
// LoadEmoji blocks until the static and fullsize image has been processed, and then returns the completed emoji.
func (p *ProcessingEmoji) Load(ctx context.Context) (*gtsmodel.Emoji, error) {
emoji, done, err := p.load(ctx)
if !done {
// On a context-canceled error (marked as !done), requeue for loading.
p.mgr.state.Workers.Dereference.Queue.Push(func(ctx context.Context) {
if _, _, err := p.load(ctx); err != nil {
log.Errorf(ctx, "error loading emoji: %v", err)
}
})
}
return emoji, err
}
// load is the package private form of load() that is wrapped to catch context canceled.
func (p *ProcessingEmoji) load(ctx context.Context) (
emoji *gtsmodel.Emoji,
done bool,
err error,
) {
err = p.proc.Process(func() error {
if done = p.done; done {
// Already proc'd.
return p.err
}
defer func() {
// This is only done when ctx NOT cancelled.
if done = (err == nil || !errorsv2.IsV2(err,
context.Canceled,
context.DeadlineExceeded,
)); done {
// Processing finished,
// whether error or not!
// Anything from here, we
// need to ensure happens
// (i.e. no ctx canceled).
ctx = context.WithoutCancel(ctx)
// On error, clean
// downloaded files.
if err != nil {
p.cleanup(ctx)
}
// Update with latest details, whatever happened.
e := p.mgr.state.DB.UpdateEmoji(ctx, p.emoji)
if e != nil {
log.Errorf(ctx, "error updating emoji in db: %v", e)
}
// Store values.
p.done = true
p.err = err
}
}()
// Attempt to store media and calculate
// full-size media attachment details.
//
// This will update p.emoji as it goes.
err = p.store(ctx)
return err
})
// Return a copy of emoji.
emoji = new(gtsmodel.Emoji)
*emoji = *p.emoji
return
}
// store calls the data function attached to p if it hasn't been called yet,
// and updates the underlying attachment fields as necessary. It will then stream
// bytes from p's reader directly into storage so that it can be retrieved later.
func (p *ProcessingEmoji) store(ctx context.Context) error {
// Load media from data func.
rc, err := p.dataFn(ctx)
if err != nil {
return gtserror.Newf("error executing data function: %w", err)
}
var (
// predfine temporary media
// file path variables so we
// can remove them on error.
temppath string
staticpath string
)
defer func() {
if err := remove(temppath, staticpath); err != nil {
log.Errorf(ctx, "error(s) cleaning up files: %v", err)
}
}()
// Drain reader to tmp file
// (this reader handles close).
temppath, err = drainToTmp(rc)
if err != nil {
return gtserror.Newf("error draining data to tmp: %w", err)
}
// Pass input file through ffprobe to
// parse further metadata information.
result, err := ffprobe(ctx, temppath)
if err != nil && !isUnsupportedTypeErr(err) {
return gtserror.Newf("ffprobe error: %w", err)
} else if result == nil {
log.Warn(ctx, "unsupported data type")
return nil
}
var ext string
// Get type from ffprobe format data.
fileType, ext := result.GetFileType()
if fileType != gtsmodel.FileTypeImage {
return gtserror.Newf("unsupported emoji filetype: %s (%s)", fileType, ext)
}
// Add file extension to path.
newpath := temppath + "." + ext
// Before ffmpeg processing, rename to set file ext.
if err := os.Rename(temppath, newpath); err != nil {
return gtserror.Newf("error renaming to %s - >%s: %w", temppath, newpath, err)
}
// Update path var
// AFTER successful.
temppath = newpath
// Generate a static image from input emoji path.
staticpath, err = ffmpegGenerateStatic(ctx, temppath)
if err != nil {
return gtserror.Newf("error generating emoji static: %w", err)
}
var pathID string
if p.newPathID != "" {
// This is a refreshed emoji with a new
// path ID that this will be stored under.
pathID = p.newPathID
} else {
// This is a new emoji, simply use provided ID.
pathID = p.emoji.ID
}
// Calculate final emoji media file path.
p.emoji.ImagePath = uris.StoragePathForAttachment(
p.instAccID,
string(TypeEmoji),
string(SizeOriginal),
pathID,
ext,
)
// Calculate final emoji static media file path.
p.emoji.ImageStaticPath = uris.StoragePathForAttachment(
p.instAccID,
string(TypeEmoji),
string(SizeStatic),
pathID,
"png",
)
// Copy temporary file into storage at path.
filesz, err := p.mgr.state.Storage.PutFile(ctx,
p.emoji.ImagePath,
temppath,
)
if err != nil {
return gtserror.Newf("error writing emoji to storage: %w", err)
}
// Copy static emoji file into storage at path.
staticsz, err := p.mgr.state.Storage.PutFile(ctx,
p.emoji.ImageStaticPath,
staticpath,
)
if err != nil {
return gtserror.Newf("error writing static to storage: %w", err)
}
// Set final determined file sizes.
p.emoji.ImageFileSize = int(filesz)
p.emoji.ImageStaticFileSize = int(staticsz)
// Generate an emoji media static URL.
p.emoji.ImageURL = uris.URIForAttachment(
p.instAccID,
string(TypeEmoji),
string(SizeOriginal),
pathID,
ext,
)
// Generate an emoji image static URL.
p.emoji.ImageStaticURL = uris.URIForAttachment(
p.instAccID,
string(TypeEmoji),
string(SizeStatic),
pathID,
"png",
)
// Get mimetype for the file container
// type, falling back to generic data.
p.emoji.ImageContentType = getMimeType(ext)
// Set the known emoji static content type.
p.emoji.ImageStaticContentType = "image/png"
// We can now consider this cached.
p.emoji.Cached = util.Ptr(true)
return nil
}
// cleanup will remove any traces of processing emoji from storage,
// and perform any other necessary cleanup steps after failure.
func (p *ProcessingEmoji) cleanup(ctx context.Context) {
log.Debugf(ctx, "running cleanup of emoji %s", p.emoji.ID)
if p.emoji.ImagePath != "" {
// Ensure emoji file at path is deleted from storage.
err := p.mgr.state.Storage.Delete(ctx, p.emoji.ImagePath)
if err != nil && !storage.IsNotFound(err) {
log.Errorf(ctx, "error deleting %s: %v", p.emoji.ImagePath, err)
}
}
if p.emoji.ImageStaticPath != "" {
// Ensure emoji static file at path is deleted from storage.
err := p.mgr.state.Storage.Delete(ctx, p.emoji.ImageStaticPath)
if err != nil && !storage.IsNotFound(err) {
log.Errorf(ctx, "error deleting %s: %v", p.emoji.ImageStaticPath, err)
}
}
// Unset processor-calculated fields.
p.emoji.ImageStaticContentType = ""
p.emoji.ImageStaticFileSize = 0
p.emoji.ImageStaticPath = ""
p.emoji.ImageStaticURL = ""
p.emoji.ImageContentType = ""
p.emoji.ImageFileSize = 0
p.emoji.ImagePath = ""
p.emoji.ImageURL = ""
// Ensure marked as not cached.
p.emoji.Cached = util.Ptr(false)
}