GoToSocial/internal/processing/fedi/status.go

246 lines
7.6 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 fedi
import (
"context"
"errors"
"net/url"
"slices"
"strconv"
"github.com/superseriousbusiness/activity/streams/vocab"
"github.com/superseriousbusiness/gotosocial/internal/ap"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/paging"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
// StatusGet handles the getting of a fedi/activitypub representation of a local status.
// It performs appropriate authentication before returning a JSON serializable interface.
func (p *Processor) StatusGet(ctx context.Context, requestedUser string, statusID string) (interface{}, gtserror.WithCode) {
// Authenticate incoming request, getting related accounts.
auth, errWithCode := p.authenticate(ctx, requestedUser)
if errWithCode != nil {
return nil, errWithCode
}
if auth.handshakingURI != nil {
// We're currently handshaking, which means
// we don't know this account yet. This should
// be a very rare race condition.
err := gtserror.Newf("network race handshaking %s", auth.handshakingURI)
return nil, gtserror.NewErrorInternalError(err)
}
receivingAcct := auth.receivingAcct
requestingAcct := auth.requestingAcct
status, err := p.state.DB.GetStatusByID(ctx, statusID)
if err != nil {
return nil, gtserror.NewErrorNotFound(err)
}
if status.AccountID != receivingAcct.ID {
const text = "status does not belong to receiving account"
return nil, gtserror.NewErrorNotFound(errors.New(text))
}
if status.BoostOfID != "" {
const text = "status is a boost wrapper"
return nil, gtserror.NewErrorNotFound(errors.New(text))
}
visible, err := p.filter.StatusVisible(ctx, requestingAcct, status)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if !visible {
const text = "status not visible to requesting account"
return nil, gtserror.NewErrorNotFound(errors.New(text))
}
statusable, err := p.converter.StatusToAS(ctx, status)
if err != nil {
err := gtserror.Newf("error converting status: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
data, err := ap.Serialize(statusable)
if err != nil {
err := gtserror.Newf("error serializing status: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}
// GetStatus handles the getting of a fedi/activitypub representation of replies to a status,
// performing appropriate authentication before returning a JSON serializable interface to the caller.
func (p *Processor) StatusRepliesGet(
ctx context.Context,
requestedUser string,
statusID string,
page *paging.Page,
onlyOtherAccounts bool,
) (interface{}, gtserror.WithCode) {
// Authenticate incoming request, getting related accounts.
auth, errWithCode := p.authenticate(ctx, requestedUser)
if errWithCode != nil {
return nil, errWithCode
}
if auth.handshakingURI != nil {
// We're currently handshaking, which means
// we don't know this account yet. This should
// be a very rare race condition.
err := gtserror.Newf("network race handshaking %s", auth.handshakingURI)
return nil, gtserror.NewErrorInternalError(err)
}
receivingAcct := auth.receivingAcct
requestingAcct := auth.requestingAcct
// Get target status and ensure visible to requester.
status, errWithCode := p.c.GetVisibleTargetStatus(ctx,
requestingAcct,
statusID,
nil, // default freshness
)
if errWithCode != nil {
return nil, errWithCode
}
// Ensure status is by receiving account.
if status.AccountID != receivingAcct.ID {
const text = "status does not belong to receiving account"
return nil, gtserror.NewErrorNotFound(errors.New(text))
}
if status.BoostOfID != "" {
const text = "status is a boost wrapper"
return nil, gtserror.NewErrorNotFound(errors.New(text))
}
// Parse replies collection ID from status' URI with onlyOtherAccounts param.
onlyOtherAccStr := "only_other_accounts=" + strconv.FormatBool(onlyOtherAccounts)
collectionID, err := url.Parse(status.URI + "/replies?" + onlyOtherAccStr)
if err != nil {
err := gtserror.Newf("error parsing status uri %s: %w", status.URI, err)
return nil, gtserror.NewErrorInternalError(err)
}
// Get *all* available replies for status (i.e. without paging).
replies, err := p.state.DB.GetStatusReplies(ctx, status.ID)
if err != nil {
err := gtserror.Newf("error getting status replies: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
if onlyOtherAccounts {
// If 'onlyOtherAccounts' is set, drop all by original status author.
replies = slices.DeleteFunc(replies, func(reply *gtsmodel.Status) bool {
return reply.AccountID == status.AccountID
})
}
// Reslice replies dropping all those invisible to requester.
replies, err = p.filter.StatusesVisible(ctx, requestingAcct, replies)
if err != nil {
err := gtserror.Newf("error filtering status replies: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
var obj vocab.Type
// Start AS collection params.
var params ap.CollectionParams
params.ID = collectionID
params.Total = util.Ptr(len(replies))
if page == nil {
// i.e. paging disabled, return collection
// that links to first page (i.e. path below).
params.First = new(paging.Page)
params.Query = make(url.Values, 1)
params.Query.Set("limit", "20") // enables paging
obj = ap.NewASOrderedCollection(params)
} else {
// i.e. paging enabled
// Page and reslice the replies according to given parameters.
replies = paging.Page_PageFunc(page, replies, func(reply *gtsmodel.Status) string {
return reply.ID
})
// page ID values.
var lo, hi string
if len(replies) > 0 {
// Get the lowest and highest
// ID values, used for paging.
lo = replies[len(replies)-1].ID
hi = replies[0].ID
}
// Start AS collection page params.
var pageParams ap.CollectionPageParams
pageParams.CollectionParams = params
// Current page details.
pageParams.Current = page
pageParams.Count = len(replies)
// Set linked next/prev parameters.
pageParams.Next = page.Next(lo, hi)
pageParams.Prev = page.Prev(lo, hi)
// Set the collection item property builder function.
pageParams.Append = func(i int, itemsProp ap.ItemsPropertyBuilder) {
// Get follower URI at index.
status := replies[i]
uri := status.URI
// Parse URL object from URI.
iri, err := url.Parse(uri)
if err != nil {
log.Errorf(ctx, "error parsing status uri %s: %v", uri, err)
return
}
// Add to item property.
itemsProp.AppendIRI(iri)
}
// Build AS collection page object from params.
obj = ap.NewASOrderedCollectionPage(pageParams)
}
// Serialized the prepared object.
data, err := ap.Serialize(obj)
if err != nil {
err := gtserror.Newf("error serializing: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}