mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-05 14:40:42 +01:00
192 lines
6.7 KiB
Go
192 lines
6.7 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package dereferencing
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import (
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"context"
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"fmt"
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"io"
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"net/url"
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"github.com/superseriousbusiness/gotosocial/internal/db"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/id"
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"github.com/superseriousbusiness/gotosocial/internal/log"
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"github.com/superseriousbusiness/gotosocial/internal/media"
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"github.com/superseriousbusiness/gotosocial/internal/util"
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)
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func (d *Dereferencer) GetRemoteEmoji(ctx context.Context, requestingUsername string, remoteURL string, shortcode string, domain string, id string, emojiURI string, ai *media.AdditionalEmojiInfo, refresh bool) (*media.ProcessingEmoji, error) {
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var (
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shortcodeDomain = shortcode + "@" + domain
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processingEmoji *media.ProcessingEmoji
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)
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// Ensure we have been passed a valid URL.
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derefURI, err := url.Parse(remoteURL)
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if err != nil {
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return nil, fmt.Errorf("GetRemoteEmoji: error parsing url for emoji %s: %s", shortcodeDomain, err)
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}
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// Acquire lock for derefs map.
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unlock := d.state.FedLocks.Lock(remoteURL)
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unlock = util.DoOnce(unlock)
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defer unlock()
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// first check if we're already processing this emoji
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if alreadyProcessing, ok := d.derefEmojis[shortcodeDomain]; ok {
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// we're already on it, no worries
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processingEmoji = alreadyProcessing
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} else {
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// not processing it yet, let's start
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t, err := d.transportController.NewTransportForUsername(ctx, requestingUsername)
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if err != nil {
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return nil, fmt.Errorf("GetRemoteEmoji: error creating transport to fetch emoji %s: %s", shortcodeDomain, err)
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}
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dataFunc := func(innerCtx context.Context) (io.ReadCloser, int64, error) {
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return t.DereferenceMedia(innerCtx, derefURI)
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}
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newProcessing, err := d.mediaManager.PreProcessEmoji(ctx, dataFunc, shortcode, id, emojiURI, ai, refresh)
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if err != nil {
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return nil, fmt.Errorf("GetRemoteEmoji: error processing emoji %s: %s", shortcodeDomain, err)
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}
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// store it in our map to indicate it's in process
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d.derefEmojis[shortcodeDomain] = newProcessing
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processingEmoji = newProcessing
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}
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// Unlock map.
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unlock()
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defer func() {
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// On exit safely remove emoji from map.
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unlock := d.state.FedLocks.Lock(remoteURL)
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delete(d.derefEmojis, shortcodeDomain)
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unlock()
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}()
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// Start emoji attachment loading (blocking call).
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if _, err := processingEmoji.LoadEmoji(ctx); err != nil {
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return nil, err
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}
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return processingEmoji, nil
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}
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func (d *Dereferencer) populateEmojis(ctx context.Context, rawEmojis []*gtsmodel.Emoji, requestingUsername string) ([]*gtsmodel.Emoji, error) {
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// At this point we should know:
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// * the AP uri of the emoji
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// * the domain of the emoji
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// * the shortcode of the emoji
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// * the remote URL of the image
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// This should be enough to dereference the emoji
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gotEmojis := make([]*gtsmodel.Emoji, 0, len(rawEmojis))
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for _, e := range rawEmojis {
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var gotEmoji *gtsmodel.Emoji
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var err error
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shortcodeDomain := e.Shortcode + "@" + e.Domain
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// check if we already know this emoji
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if e.ID != "" {
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// we had an ID for this emoji already, which means
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// it should be fleshed out already and we won't
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// have to get it from the database again
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gotEmoji = e
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} else if gotEmoji, err = d.state.DB.GetEmojiByShortcodeDomain(ctx, e.Shortcode, e.Domain); err != nil && err != db.ErrNoEntries {
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log.Errorf(ctx, "error checking database for emoji %s: %s", shortcodeDomain, err)
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continue
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}
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var refresh bool
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if gotEmoji != nil {
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// we had the emoji already, but refresh it if necessary
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if e.UpdatedAt.Unix() > gotEmoji.ImageUpdatedAt.Unix() {
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log.Tracef(ctx, "emoji %s was updated since we last saw it, will refresh", shortcodeDomain)
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refresh = true
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}
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if !refresh && (e.URI != gotEmoji.URI) {
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log.Tracef(ctx, "emoji %s changed URI since we last saw it, will refresh", shortcodeDomain)
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refresh = true
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}
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if !refresh && (e.ImageRemoteURL != gotEmoji.ImageRemoteURL) {
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log.Tracef(ctx, "emoji %s changed image URL since we last saw it, will refresh", shortcodeDomain)
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refresh = true
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}
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if !refresh {
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log.Tracef(ctx, "emoji %s is up to date, will not refresh", shortcodeDomain)
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} else {
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log.Tracef(ctx, "refreshing emoji %s", shortcodeDomain)
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emojiID := gotEmoji.ID // use existing ID
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processingEmoji, err := d.GetRemoteEmoji(ctx, requestingUsername, e.ImageRemoteURL, e.Shortcode, e.Domain, emojiID, e.URI, &media.AdditionalEmojiInfo{
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Domain: &e.Domain,
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ImageRemoteURL: &e.ImageRemoteURL,
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ImageStaticRemoteURL: &e.ImageStaticRemoteURL,
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Disabled: gotEmoji.Disabled,
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VisibleInPicker: gotEmoji.VisibleInPicker,
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}, refresh)
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if err != nil {
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log.Errorf(ctx, "couldn't refresh remote emoji %s: %s", shortcodeDomain, err)
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continue
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}
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if gotEmoji, err = processingEmoji.LoadEmoji(ctx); err != nil {
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log.Errorf(ctx, "couldn't load refreshed remote emoji %s: %s", shortcodeDomain, err)
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continue
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}
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}
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} else {
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// it's new! go get it!
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newEmojiID, err := id.NewRandomULID()
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if err != nil {
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log.Errorf(ctx, "error generating id for remote emoji %s: %s", shortcodeDomain, err)
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continue
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}
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processingEmoji, err := d.GetRemoteEmoji(ctx, requestingUsername, e.ImageRemoteURL, e.Shortcode, e.Domain, newEmojiID, e.URI, &media.AdditionalEmojiInfo{
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Domain: &e.Domain,
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ImageRemoteURL: &e.ImageRemoteURL,
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ImageStaticRemoteURL: &e.ImageStaticRemoteURL,
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Disabled: e.Disabled,
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VisibleInPicker: e.VisibleInPicker,
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}, refresh)
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if err != nil {
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log.Errorf(ctx, "couldn't get remote emoji %s: %s", shortcodeDomain, err)
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continue
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}
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if gotEmoji, err = processingEmoji.LoadEmoji(ctx); err != nil {
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log.Errorf(ctx, "couldn't load remote emoji %s: %s", shortcodeDomain, err)
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continue
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}
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}
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// if we get here, we either had the emoji already or we successfully fetched it
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gotEmojis = append(gotEmojis, gotEmoji)
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}
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return gotEmojis, nil
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}
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