gotosocial/internal/processing/search.go
2021-06-04 14:16:29 +02:00

297 lines
11 KiB
Go

/*
GoToSocial
Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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 processing
import (
"errors"
"fmt"
"net/url"
"strings"
"github.com/sirupsen/logrus"
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/oauth"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
func (p *processor) SearchGet(authed *oauth.Auth, searchQuery *apimodel.SearchQuery) (*apimodel.SearchResult, gtserror.WithCode) {
l := p.log.WithFields(logrus.Fields{
"func": "SearchGet",
"query": searchQuery.Query,
})
results := &apimodel.SearchResult{
Accounts: []apimodel.Account{},
Statuses: []apimodel.Status{},
Hashtags: []apimodel.Tag{},
}
foundAccounts := []*gtsmodel.Account{}
foundStatuses := []*gtsmodel.Status{}
// foundHashtags := []*gtsmodel.Tag{}
// convert the query to lowercase and trim leading/trailing spaces
query := strings.ToLower(strings.TrimSpace(searchQuery.Query))
var foundOne bool
// check if the query is something like @whatever_username@example.org -- this means it's a remote account
if !foundOne && util.IsMention(searchQuery.Query) {
l.Debug("search term is a mention, looking it up...")
foundAccount, err := p.searchAccountByMention(authed, searchQuery.Query, searchQuery.Resolve)
if err == nil && foundAccount != nil {
foundAccounts = append(foundAccounts, foundAccount)
foundOne = true
l.Debug("got an account by searching by mention")
}
}
// check if the query is a URI and just do a lookup for that, straight up
if uri, err := url.Parse(query); err == nil && !foundOne {
// 1. check if it's a status
if foundStatus, err := p.searchStatusByURI(authed, uri, searchQuery.Resolve); err == nil && foundStatus != nil {
foundStatuses = append(foundStatuses, foundStatus)
foundOne = true
l.Debug("got a status by searching by URI")
}
// 2. check if it's an account
if foundAccount, err := p.searchAccountByURI(authed, uri, searchQuery.Resolve); err == nil && foundAccount != nil {
foundAccounts = append(foundAccounts, foundAccount)
foundOne = true
l.Debug("got an account by searching by URI")
}
}
if !foundOne {
// we haven't found anything yet so search for text now
l.Debug("nothing found by mention or by URI, will fall back to searching by text now")
}
/*
FROM HERE ON we have our search results, it's just a matter of filtering them according to what this user is allowed to see,
and then converting them into our frontend format.
*/
for _, foundAccount := range foundAccounts {
// make sure there's no block in either direction between the account and the requester
if blocked, err := p.db.Blocked(authed.Account.ID, foundAccount.ID); err == nil && !blocked {
// all good, convert it and add it to the results
if acctMasto, err := p.tc.AccountToMastoPublic(foundAccount); err == nil && acctMasto != nil {
results.Accounts = append(results.Accounts, *acctMasto)
}
}
}
for _, foundStatus := range foundStatuses {
statusOwner := &gtsmodel.Account{}
if err := p.db.GetByID(foundStatus.AccountID, statusOwner); err != nil {
continue
}
relevantAccounts, err := p.db.PullRelevantAccountsFromStatus(foundStatus)
if err != nil {
continue
}
if visible, err := p.db.StatusVisible(foundStatus, statusOwner, authed.Account, relevantAccounts); !visible || err != nil {
continue
}
statusMasto, err := p.tc.StatusToMasto(foundStatus, statusOwner, authed.Account, relevantAccounts.BoostedAccount, relevantAccounts.ReplyToAccount, nil)
if err != nil {
continue
}
results.Statuses = append(results.Statuses, *statusMasto)
}
return results, nil
}
func (p *processor) searchStatusByURI(authed *oauth.Auth, uri *url.URL, resolve bool) (*gtsmodel.Status, error) {
maybeStatus := &gtsmodel.Status{}
if err := p.db.GetWhere([]db.Where{{Key: "uri", Value: uri.String(), CaseInsensitive: true}}, maybeStatus); err == nil {
// we have it and it's a status
return maybeStatus, nil
} else if err := p.db.GetWhere([]db.Where{{Key: "url", Value: uri.String(), CaseInsensitive: true}}, maybeStatus); err == nil {
// we have it and it's a status
return maybeStatus, nil
}
// we don't have it locally so dereference it if we're allowed to
if resolve {
statusable, err := p.federator.DereferenceRemoteStatus(authed.Account.Username, uri)
if err == nil {
// it IS a status!
// extract the status owner's IRI from the statusable
var statusOwnerURI *url.URL
statusAttributedTo := statusable.GetActivityStreamsAttributedTo()
for i := statusAttributedTo.Begin(); i != statusAttributedTo.End(); i = i.Next() {
if i.IsIRI() {
statusOwnerURI = i.GetIRI()
break
}
}
if statusOwnerURI == nil {
return nil, errors.New("couldn't extract ownerAccountURI from statusable")
}
// make sure the status owner exists in the db by searching for it
_, err := p.searchAccountByURI(authed, statusOwnerURI, resolve)
if err != nil {
return nil, err
}
// we have the status owner, we have the dereferenced status, so now we should finish dereferencing the status properly
// first turn it into a gtsmodel.Status
status, err := p.tc.ASStatusToStatus(statusable)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
// put it in the DB so it gets a UUID
if err := p.db.Put(status); err != nil {
return nil, fmt.Errorf("error putting status in the db: %s", err)
}
// properly dereference everything in the status (media attachments etc)
if err := p.dereferenceStatusFields(status, authed.Account.Username); err != nil {
return nil, fmt.Errorf("error dereferencing status fields: %s", err)
}
// update with the nicely dereferenced status
if err := p.db.UpdateByID(status.ID, status); err != nil {
return nil, fmt.Errorf("error updating status in the db: %s", err)
}
return status, nil
}
}
return nil, nil
}
func (p *processor) searchAccountByURI(authed *oauth.Auth, uri *url.URL, resolve bool) (*gtsmodel.Account, error) {
maybeAccount := &gtsmodel.Account{}
if err := p.db.GetWhere([]db.Where{{Key: "uri", Value: uri.String(), CaseInsensitive: true}}, maybeAccount); err == nil {
// we have it and it's an account
return maybeAccount, nil
} else if err = p.db.GetWhere([]db.Where{{Key: "url", Value: uri.String(), CaseInsensitive: true}}, maybeAccount); err == nil {
// we have it and it's an account
return maybeAccount, nil
}
if resolve {
// we don't have it locally so try and dereference it
accountable, err := p.federator.DereferenceRemoteAccount(authed.Account.Username, uri)
if err != nil {
return nil, fmt.Errorf("searchAccountByURI: error dereferencing account with uri %s: %s", uri.String(), err)
}
// it IS an account!
account, err := p.tc.ASRepresentationToAccount(accountable, false)
if err != nil {
return nil, fmt.Errorf("searchAccountByURI: error dereferencing account with uri %s: %s", uri.String(), err)
}
if err := p.db.Put(account); err != nil {
return nil, fmt.Errorf("searchAccountByURI: error inserting account with uri %s: %s", uri.String(), err)
}
if err := p.dereferenceAccountFields(account, authed.Account.Username, false); err != nil {
return nil, fmt.Errorf("searchAccountByURI: error further dereferencing account with uri %s: %s", uri.String(), err)
}
return account, nil
}
return nil, nil
}
func (p *processor) searchAccountByMention(authed *oauth.Auth, mention string, resolve bool) (*gtsmodel.Account, error) {
// query is for a remote account
username, domain, err := util.ExtractMentionParts(mention)
if err != nil {
return nil, fmt.Errorf("searchAccountByMention: error extracting mention parts: %s", err)
}
// if it's a local account we can skip a whole bunch of stuff
maybeAcct := &gtsmodel.Account{}
if domain == p.config.Host {
if err = p.db.GetLocalAccountByUsername(username, maybeAcct); err != nil {
return nil, fmt.Errorf("searchAccountByMention: error getting local account by username: %s", err)
}
return maybeAcct, nil
}
// it's not a local account so first we'll check if it's in the database already...
where := []db.Where{
{Key: "username", Value: username, CaseInsensitive: true},
{Key: "domain", Value: domain, CaseInsensitive: true},
}
err = p.db.GetWhere(where, maybeAcct)
if err == nil {
// we've got it stored locally already!
return maybeAcct, nil
}
if _, ok := err.(db.ErrNoEntries); !ok {
// if it's not errNoEntries there's been a real database error so bail at this point
return nil, fmt.Errorf("searchAccountByMention: database error: %s", err)
}
// we got a db.ErrNoEntries, so we just don't have the account locally stored -- check if we can dereference it
if resolve {
// we're allowed to resolve it so let's try
// first we need to webfinger the remote account to convert the username and domain into the activitypub URI for the account
acctURI, err := p.federator.FingerRemoteAccount(authed.Account.Username, username, domain)
if err != nil {
// something went wrong doing the webfinger lookup so we can't process the request
return nil, fmt.Errorf("searchAccountByMention: error fingering remote account with username %s and domain %s: %s", username, domain, err)
}
// dereference the account based on the URI we retrieved from the webfinger lookup
accountable, err := p.federator.DereferenceRemoteAccount(authed.Account.Username, acctURI)
if err != nil {
// something went wrong doing the dereferencing so we can't process the request
return nil, fmt.Errorf("searchAccountByMention: error dereferencing remote account with uri %s: %s", acctURI.String(), err)
}
// convert the dereferenced account to the gts model of that account
foundAccount, err := p.tc.ASRepresentationToAccount(accountable, false)
if err != nil {
// something went wrong doing the conversion to a gtsmodel.Account so we can't process the request
return nil, fmt.Errorf("searchAccountByMention: error converting account with uri %s: %s", acctURI.String(), err)
}
// put this new account in our database
if err := p.db.Put(foundAccount); err != nil {
return nil, fmt.Errorf("searchAccountByMention: error inserting account with uri %s: %s", acctURI.String(), err)
}
// properly dereference all the fields on the account immediately
if err := p.dereferenceAccountFields(foundAccount, authed.Account.Username, true); err != nil {
return nil, fmt.Errorf("searchAccountByMention: error dereferencing fields on account with uri %s: %s", acctURI.String(), err)
}
}
return nil, nil
}