gotosocial/internal/processing/fedi/collections.go

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// 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/http"
"net/url"
"github.com/superseriousbusiness/activity/streams/vocab"
"github.com/superseriousbusiness/gotosocial/internal/ap"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/paging"
)
// InboxPost handles POST requests to a user's inbox for new activitypub messages.
//
// InboxPost returns true if the request was handled as an ActivityPub POST to an actor's inbox.
// If false, the request was not an ActivityPub request and may still be handled by the caller in another way, such as serving a web page.
//
// If the error is nil, then the ResponseWriter's headers and response has already been written. If a non-nil error is returned, then no response has been written.
//
// If the Actor was constructed with the Federated Protocol enabled, side effects will occur.
//
// If the Federated Protocol is not enabled, writes the http.StatusMethodNotAllowed status code in the response. No side effects occur.
func (p *Processor) InboxPost(ctx context.Context, w http.ResponseWriter, r *http.Request) (bool, error) {
return p.federator.FederatingActor().PostInbox(ctx, w, r)
}
// OutboxGet returns the activitypub representation of a local user's outbox.
// This contains links to PUBLIC posts made by this user.
func (p *Processor) OutboxGet(
ctx context.Context,
requestedUser string,
page bool,
maxID string,
minID string,
) (interface{}, gtserror.WithCode) {
// Authenticate the incoming request, getting related user accounts.
_, receiver, errWithCode := p.authenticate(ctx, requestedUser)
if errWithCode != nil {
return nil, errWithCode
}
var data map[string]interface{}
// There are two scenarios:
// 1. we're asked for the whole collection and not a page -- we can just return the collection, with no items, but a link to 'first' page.
// 2. we're asked for a specific page; this can be either the first page or any other page
if !page {
/*
scenario 1: return the collection with no items
we want something that looks like this:
{
"@context": "https://www.w3.org/ns/activitystreams",
"id": "https://example.org/users/whatever/outbox",
"type": "OrderedCollection",
"first": "https://example.org/users/whatever/outbox?page=true",
"last": "https://example.org/users/whatever/outbox?min_id=0&page=true"
}
*/
collection, err := p.converter.OutboxToASCollection(ctx, receiver.OutboxURI)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
data, err = ap.Serialize(collection)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}
// scenario 2 -- get the requested page
// limit pages to 30 entries per page
publicStatuses, err := p.state.DB.GetAccountStatuses(ctx, receiver.ID, 30, true, true, maxID, minID, false, true)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return nil, gtserror.NewErrorInternalError(err)
}
outboxPage, err := p.converter.StatusesToASOutboxPage(ctx, receiver.OutboxURI, maxID, minID, publicStatuses)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
data, err = ap.Serialize(outboxPage)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}
// FollowersGet handles the getting of a fedi/activitypub representation of a user/account's followers, performing appropriate
// authentication before returning a JSON serializable interface to the caller.
func (p *Processor) FollowersGet(ctx context.Context, requestedUser string, page *paging.Page) (interface{}, gtserror.WithCode) {
// Authenticate the incoming request, getting related user accounts.
_, receiver, errWithCode := p.authenticate(ctx, requestedUser)
if errWithCode != nil {
return nil, errWithCode
}
// Parse the collection ID object from account's followers URI.
collectionID, err := url.Parse(receiver.FollowersURI)
if err != nil {
err := gtserror.Newf("error parsing account followers uri %s: %w", receiver.FollowersURI, err)
return nil, gtserror.NewErrorInternalError(err)
}
// Ensure we have stats for this account.
if receiver.Stats == nil {
if err := p.state.DB.PopulateAccountStats(ctx, receiver); err != nil {
err := gtserror.Newf("error getting stats for account %s: %w", receiver.ID, err)
return nil, gtserror.NewErrorInternalError(err)
}
}
var obj vocab.Type
// Start the AS collection params.
var params ap.CollectionParams
params.ID = collectionID
params.Total = *receiver.Stats.FollowersCount
switch {
case receiver.IsInstance() ||
*receiver.Settings.HideCollections:
// Instance account (can't follow/be followed),
// or an account that hides followers/following.
// Respect this by just returning totalItems.
obj = ap.NewASOrderedCollection(params)
case 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", "40") // enables paging
obj = ap.NewASOrderedCollection(params)
default:
// i.e. paging enabled
// Get the request page of full follower objects with attached accounts.
followers, err := p.state.DB.GetAccountFollowers(ctx, receiver.ID, page)
if err != nil {
err := gtserror.Newf("error getting followers: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
// page ID values.
var lo, hi string
if len(followers) > 0 {
// Get the lowest and highest
// ID values, used for paging.
lo = followers[len(followers)-1].ID
hi = followers[0].ID
}
// Start building AS collection page params.
var pageParams ap.CollectionPageParams
pageParams.CollectionParams = params
// Current page details.
pageParams.Current = page
pageParams.Count = len(followers)
// 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.
follow := followers[i]
accURI := follow.Account.URI
// Parse URL object from URI.
iri, err := url.Parse(accURI)
if err != nil {
log.Errorf(ctx, "error parsing account uri %s: %v", accURI, 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
}
// FollowingGet handles the getting of a fedi/activitypub representation of a user/account's following, performing appropriate
// authentication before returning a JSON serializable interface to the caller.
func (p *Processor) FollowingGet(ctx context.Context, requestedUser string, page *paging.Page) (interface{}, gtserror.WithCode) {
// Authenticate the incoming request, getting related user accounts.
_, receiver, errWithCode := p.authenticate(ctx, requestedUser)
if errWithCode != nil {
return nil, errWithCode
}
// Parse collection ID from account's following URI.
collectionID, err := url.Parse(receiver.FollowingURI)
if err != nil {
err := gtserror.Newf("error parsing account following uri %s: %w", receiver.FollowingURI, err)
return nil, gtserror.NewErrorInternalError(err)
}
// Ensure we have stats for this account.
if receiver.Stats == nil {
if err := p.state.DB.PopulateAccountStats(ctx, receiver); err != nil {
err := gtserror.Newf("error getting stats for account %s: %w", receiver.ID, err)
return nil, gtserror.NewErrorInternalError(err)
}
}
var obj vocab.Type
// Start AS collection params.
var params ap.CollectionParams
params.ID = collectionID
params.Total = *receiver.Stats.FollowingCount
switch {
case receiver.IsInstance() ||
*receiver.Settings.HideCollections:
// Instance account (can't follow/be followed),
// or an account that hides followers/following.
// Respect this by just returning totalItems.
obj = ap.NewASOrderedCollection(params)
case 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", "40") // enables paging
obj = ap.NewASOrderedCollection(params)
default:
// i.e. paging enabled
// Get the request page of full follower objects with attached accounts.
follows, err := p.state.DB.GetAccountFollows(ctx, receiver.ID, page)
if err != nil {
err := gtserror.Newf("error getting follows: %w", err)
return nil, gtserror.NewErrorInternalError(err)
}
// page ID values.
var lo, hi string
if len(follows) > 0 {
// Get the lowest and highest
// ID values, used for paging.
lo = follows[len(follows)-1].ID
hi = follows[0].ID
}
// Start AS collection page params.
var pageParams ap.CollectionPageParams
pageParams.CollectionParams = params
// Current page details.
pageParams.Current = page
pageParams.Count = len(follows)
// 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 followed URI at index.
follow := follows[i]
accURI := follow.TargetAccount.URI
// Parse URL object from URI.
iri, err := url.Parse(accURI)
if err != nil {
log.Errorf(ctx, "error parsing account uri %s: %v", accURI, 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
}
// FeaturedCollectionGet returns an ordered collection of the requested username's Pinned posts.
// The returned collection have an `items` property which contains an ordered list of status URIs.
func (p *Processor) FeaturedCollectionGet(ctx context.Context, requestedUser string) (interface{}, gtserror.WithCode) {
// Authenticate the incoming request, getting related user accounts.
_, receiver, errWithCode := p.authenticate(ctx, requestedUser)
if errWithCode != nil {
return nil, errWithCode
}
statuses, err := p.state.DB.GetAccountPinnedStatuses(ctx, receiver.ID)
if err != nil {
if !errors.Is(err, db.ErrNoEntries) {
return nil, gtserror.NewErrorInternalError(err)
}
}
collection, err := p.converter.StatusesToASFeaturedCollection(ctx, receiver.FeaturedCollectionURI, statuses)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
data, err := ap.Serialize(collection)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}