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/*
GoToSocial
Copyright (C) 2021-2022 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 (
"context"
"errors"
"fmt"
"net/url"
"strings"
"codeberg.org/gruf/go-kv"
apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/federation/dereferencing"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/oauth"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
func (p *processor) SearchGet(ctx context.Context, authed *oauth.Auth, search *apimodel.SearchQuery) (*apimodel.SearchResult, gtserror.WithCode) {
l := log.WithFields(kv.Fields{
{"query", search.Query},
}...)
// tidy up the query and make sure it wasn't just spaces
query := strings.TrimSpace(search.Query)
if query == "" {
err := errors.New("search query was empty string after trimming space")
return nil, gtserror.NewErrorBadRequest(err, err.Error())
}
searchResult := &apimodel.SearchResult{
Accounts: []apimodel.Account{},
Statuses: []apimodel.Status{},
Hashtags: []apimodel.Tag{},
}
// currently the search will only ever return one result,
// so return nothing if the offset is greater than 0
if search.Offset > 0 {
return searchResult, nil
}
foundAccounts := []*gtsmodel.Account{}
foundStatuses := []*gtsmodel.Status{}
var foundOne bool
/*
SEARCH BY MENTION
check if the query is something like @whatever_username@example.org -- this means it's likely a remote account
*/
maybeNamestring := query
if maybeNamestring[0] != '@' {
maybeNamestring = "@" + maybeNamestring
}
if username, domain, err := util.ExtractNamestringParts(maybeNamestring); err == nil {
l.Debugf("search term %s is a mention, looking it up...", maybeNamestring)
if foundAccount, err := p.searchAccountByMention(ctx, authed, username, domain, search.Resolve); err == nil && foundAccount != nil {
foundAccounts = append(foundAccounts, foundAccount)
foundOne = true
l.Debug("got an account by searching by mention")
} else if err != nil {
l.Debugf("error looking up account %s: %s", maybeNamestring, err)
}
}
/*
SEARCH BY URI
check if the query is a URI with a recognizable scheme and dereference it
*/
if !foundOne {
if uri, err := url.Parse(query); err == nil && (uri.Scheme == "https" || uri.Scheme == "http") {
// don't attempt to resolve (ie., dereference) local accounts/statuses
resolve := search.Resolve
if uri.Host == config.GetHost() || uri.Host == config.GetAccountDomain() {
resolve = false
}
// check if it's a status or an account
if foundStatus, err := p.searchStatusByURI(ctx, authed, uri, resolve); err == nil && foundStatus != nil {
foundStatuses = append(foundStatuses, foundStatus)
l.Debug("got a status by searching by URI")
} else if foundAccount, err := p.searchAccountByURI(ctx, authed, uri, resolve); err == nil && foundAccount != nil {
foundAccounts = append(foundAccounts, foundAccount)
l.Debug("got an account by searching by URI")
}
}
}
/*
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.IsBlocked(ctx, authed.Account.ID, foundAccount.ID, true); err == nil && !blocked {
// all good, convert it and add it to the results
if apiAcct, err := p.tc.AccountToAPIAccountPublic(ctx, foundAccount); err == nil && apiAcct != nil {
searchResult.Accounts = append(searchResult.Accounts, *apiAcct)
}
}
}
for _, foundStatus := range foundStatuses {
if visible, err := p.filter.StatusVisible(ctx, foundStatus, authed.Account); !visible || err != nil {
continue
}
apiStatus, err := p.tc.StatusToAPIStatus(ctx, foundStatus, authed.Account)
if err != nil {
continue
}
searchResult.Statuses = append(searchResult.Statuses, *apiStatus)
}
return searchResult, nil
}
func (p *processor) searchStatusByURI(ctx context.Context, authed *oauth.Auth, uri *url.URL, resolve bool) (*gtsmodel.Status, error) {
// Calculate URI string once
uriStr := uri.String()
// Look for status locally (by URI), we only accept "not found" errors.
status, err := p.db.GetStatusByURI(ctx, uriStr)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return nil, fmt.Errorf("searchStatusByURI: error fetching status %q: %v", uriStr, err)
} else if err == nil {
return status, nil
}
// Again, look for status locally (by URL), we only accept "not found" errors.
status, err = p.db.GetStatusByURL(ctx, uriStr)
if err != nil && !errors.Is(err, db.ErrNoEntries) {
return nil, fmt.Errorf("searchStatusByURI: error fetching status %q: %v", uriStr, err)
} else if err == nil {
return status, nil
}
if resolve {
// This is a non-local status and we're allowed to resolve, so dereference it
status, statusable, err := p.federator.GetRemoteStatus(ctx, authed.Account.Username, uri, true, true)
if err != nil {
return nil, fmt.Errorf("searchStatusByURI: error fetching remote status %q: %v", uriStr, err)
}
// Attempt to dereference the status thread while we are here
p.federator.DereferenceRemoteThread(ctx, authed.Account.Username, uri, status, statusable)
}
return nil, nil
}
func (p *processor) searchAccountByURI(ctx context.Context, authed *oauth.Auth, uri *url.URL, resolve bool) (*gtsmodel.Account, error) {
// it might be a web url like http://example.org/@user instead
// of an AP uri like http://example.org/users/user, check first
if maybeAccount, err := p.db.GetAccountByURL(ctx, uri.String()); err == nil {
return maybeAccount, nil
}
if uri.Host == config.GetHost() || uri.Host == config.GetAccountDomain() {
// this is a local account; if we don't have it now then
// we should just bail instead of trying to get it remote
if maybeAccount, err := p.db.GetAccountByURI(ctx, uri.String()); err == nil {
return maybeAccount, nil
}
return nil, nil
}
// we don't have it yet, try to find it remotely
return p.federator.GetRemoteAccount(ctx, dereferencing.GetRemoteAccountParams{
RequestingUsername: authed.Account.Username,
RemoteAccountID: uri,
Blocking: true,
SkipResolve: !resolve,
})
}
func (p *processor) searchAccountByMention(ctx context.Context, authed *oauth.Auth, username string, domain string, resolve bool) (*gtsmodel.Account, error) {
// if it's a local account we can skip a whole bunch of stuff
if domain == config.GetHost() || domain == config.GetAccountDomain() || domain == "" {
maybeAcct, err := p.db.GetAccountByUsernameDomain(ctx, username, "")
if err == nil || err == db.ErrNoEntries {
return maybeAcct, nil
}
return nil, fmt.Errorf("searchAccountByMention: error getting local account by username: %s", err)
}
// we don't have it yet, try to find it remotely
return p.federator.GetRemoteAccount(ctx, dereferencing.GetRemoteAccountParams{
RequestingUsername: authed.Account.Username,
RemoteAccountUsername: username,
RemoteAccountHost: domain,
Blocking: true,
SkipResolve: !resolve,
})
}
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