mirror of
https://github.com/superseriousbusiness/gotosocial.git
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830 lines
23 KiB
Go
830 lines
23 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 search
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import (
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"context"
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"errors"
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"fmt"
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"net/mail"
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"net/url"
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"strings"
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"codeberg.org/gruf/go-kv"
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apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
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"github.com/superseriousbusiness/gotosocial/internal/config"
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"github.com/superseriousbusiness/gotosocial/internal/db"
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"github.com/superseriousbusiness/gotosocial/internal/gtscontext"
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"github.com/superseriousbusiness/gotosocial/internal/gtserror"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/log"
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"github.com/superseriousbusiness/gotosocial/internal/text"
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"github.com/superseriousbusiness/gotosocial/internal/util"
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)
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const (
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queryTypeAny = ""
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queryTypeAccounts = "accounts"
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queryTypeStatuses = "statuses"
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queryTypeHashtags = "hashtags"
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)
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// Get performs a search for accounts and/or statuses using the
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// provided request parameters.
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//
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// Implementation note: in this function, we try to only return
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// an error to the caller they've submitted a bad request, or when
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// a serious error has occurred. This is because the search has a
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// sort of fallthrough logic: if we can't get a result with one
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// type of search, we should proceed with y search rather than
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// returning an early error.
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//
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// If we get to the end and still haven't found anything, even
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// then we shouldn't return an error, just return an empty result.
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func (p *Processor) Get(
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ctx context.Context,
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account *gtsmodel.Account,
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req *apimodel.SearchRequest,
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) (*apimodel.SearchResult, gtserror.WithCode) {
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var (
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maxID = req.MaxID
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minID = req.MinID
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limit = req.Limit
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offset = req.Offset
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query = strings.TrimSpace(req.Query) // Trim trailing/leading whitespace.
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queryType = strings.TrimSpace(strings.ToLower(req.QueryType)) // Trim trailing/leading whitespace; convert to lowercase.
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resolve = req.Resolve
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following = req.Following
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// Include instance accounts in the first
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// parts of this search. This will be
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// changed to 'false' when doing text
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// search in the database in the latter
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// parts of this function.
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includeInstanceAccounts = true
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// Assume caller doesn't want to see
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// blocked accounts. This will change
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// to 'true' if caller is searching
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// for a specific account.
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includeBlockedAccounts = false
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)
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// Validate query.
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if query == "" {
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err := errors.New("search query was empty string after trimming space")
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return nil, gtserror.NewErrorBadRequest(err, err.Error())
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}
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// Validate query type.
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switch queryType {
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case queryTypeAny, queryTypeAccounts, queryTypeStatuses, queryTypeHashtags:
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// No problem.
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default:
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err := fmt.Errorf(
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"search query type %s was not recognized, valid options are ['%s', '%s', '%s', '%s']",
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queryType, queryTypeAny, queryTypeAccounts, queryTypeStatuses, queryTypeHashtags,
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)
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return nil, gtserror.NewErrorBadRequest(err, err.Error())
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}
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log.
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WithContext(ctx).
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WithFields(kv.Fields{
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{"maxID", maxID},
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{"minID", minID},
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{"limit", limit},
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{"offset", offset},
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{"query", query},
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{"queryType", queryType},
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{"resolve", resolve},
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{"following", following},
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}...).
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Debugf("beginning search")
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// todo: Currently we don't support offset for paging;
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// a caller can page using maxID or minID, but if they
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// supply an offset greater than 0, return nothing as
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// though there were no additional results.
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if req.Offset > 0 {
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return p.packageSearchResult(
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ctx,
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account,
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nil, nil, nil, // No results.
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req.APIv1,
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includeInstanceAccounts,
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includeBlockedAccounts,
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)
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}
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var (
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foundStatuses = make([]*gtsmodel.Status, 0, limit)
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foundAccounts = make([]*gtsmodel.Account, 0, limit)
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foundTags = make([]*gtsmodel.Tag, 0, limit)
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appendStatus = func(s *gtsmodel.Status) { foundStatuses = append(foundStatuses, s) }
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appendAccount = func(a *gtsmodel.Account) { foundAccounts = append(foundAccounts, a) }
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appendTag = func(t *gtsmodel.Tag) { foundTags = append(foundTags, t) }
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err error
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)
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// Only try to search by namestring if search type includes
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// accounts, since this is all namestring search can return.
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if includeAccounts(queryType) {
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// Copy query to avoid altering original.
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queryC := query
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// If query looks vaguely like an email address, ie. it doesn't
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// start with '@' but it has '@' in it somewhere, it's probably
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// a poorly-formed namestring. Be generous and correct for this.
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if strings.Contains(queryC, "@") && queryC[0] != '@' {
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if _, err := mail.ParseAddress(queryC); err == nil {
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// Yep, really does look like
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// an email address! Be nice.
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queryC = "@" + queryC
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}
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}
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// See if we have something that looks like a namestring.
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username, domain, err := util.ExtractNamestringParts(queryC)
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if err == nil {
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// We managed to parse query as a namestring.
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// If domain was set, this is a very specific
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// search for a particular account, so show
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// that account to the caller even if it's an
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// instance account and/or even if they have
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// it blocked. They might be looking for it
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// to unblock it again!
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domainSet := (domain != "")
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includeInstanceAccounts = domainSet
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includeBlockedAccounts = domainSet
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err = p.accountsByUsernameDomain(
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ctx,
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account,
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maxID,
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minID,
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limit,
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offset,
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username,
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domain,
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resolve,
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following,
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appendAccount,
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)
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if err != nil && !errors.Is(err, db.ErrNoEntries) {
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err = gtserror.Newf("error searching by namestring: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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// Namestrings are a pretty unique format, so
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// it's very unlikely that the caller was
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// searching for anything except an account.
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// As such, return early without falling
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// through to broader search.
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return p.packageSearchResult(
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ctx,
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account,
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foundAccounts,
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foundStatuses,
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foundTags,
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req.APIv1,
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includeInstanceAccounts,
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includeBlockedAccounts,
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)
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}
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}
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// Check if we're searching by a known URI scheme.
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// (This might just be a weirdly-parsed URI,
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// since Go's url package tends to be a bit
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// trigger-happy when deciding things are URIs).
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uri, err := url.Parse(query)
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if err == nil && (uri.Scheme == "https" || uri.Scheme == "http") {
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// URI is pretty specific so we can safely assume
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// caller wants to include blocked accounts too.
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includeBlockedAccounts = true
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if err := p.byURI(
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ctx,
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account,
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uri,
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queryType,
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resolve,
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appendAccount,
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appendStatus,
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); err != nil && !errors.Is(err, db.ErrNoEntries) {
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err = gtserror.Newf("error searching by URI: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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// This was a URI, so at this point just return
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// whatever we have. You can't search hashtags by
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// URI, and shouldn't do full-text with a URI either.
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return p.packageSearchResult(
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ctx,
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account,
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foundAccounts,
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foundStatuses,
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foundTags,
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req.APIv1,
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includeInstanceAccounts,
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includeBlockedAccounts,
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)
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}
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// If query looks like a hashtag (ie., starts
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// with '#'), then search for tags.
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//
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// Since '#' is a very unique prefix and isn't
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// shared among account or status searches, we
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// can save a bit of time by searching for this
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// now, and bailing quickly if we get no results,
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// or we're not allowed to include hashtags in
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// search results.
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//
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// We know that none of the subsequent searches
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// would show any good results either, and those
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// searches are *much* more expensive.
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keepLooking, err := p.hashtag(
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ctx,
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maxID,
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minID,
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limit,
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offset,
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query,
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queryType,
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appendTag,
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)
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if err != nil && !errors.Is(err, db.ErrNoEntries) {
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err = gtserror.Newf("error searching for hashtag: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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if !keepLooking {
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// Return whatever we have.
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return p.packageSearchResult(
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ctx,
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account,
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foundAccounts,
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foundStatuses,
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foundTags,
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req.APIv1,
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includeInstanceAccounts,
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includeBlockedAccounts,
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)
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}
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// As a last resort, search for accounts and
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// statuses using the query as arbitrary text.
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//
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// At this point we no longer want to include
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// instance accounts in the results, since searching
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// for something like 'mastodon', for example, will
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// include a million instance/service accounts that
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// have 'mastodon' in the domain, and therefore in
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// the username, making the search results useless.
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includeInstanceAccounts = false
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if err := p.byText(
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ctx,
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account,
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maxID,
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minID,
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limit,
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offset,
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query,
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queryType,
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following,
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appendAccount,
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appendStatus,
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); err != nil && !errors.Is(err, db.ErrNoEntries) {
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err = gtserror.Newf("error searching by text: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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}
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// Return whatever we ended
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// up with (could be nothing).
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return p.packageSearchResult(
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ctx,
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account,
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foundAccounts,
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foundStatuses,
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foundTags,
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req.APIv1,
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includeInstanceAccounts,
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includeBlockedAccounts,
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)
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}
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// accountsByUsernameDomain searches for accounts using
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// the provided username and domain. If domain is not set,
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// it may return more than one result by doing a text
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// search in the database for accounts matching the query.
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// Otherwise, it tries to return an exact match.
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func (p *Processor) accountsByUsernameDomain(
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ctx context.Context,
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requestingAccount *gtsmodel.Account,
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maxID string,
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minID string,
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limit int,
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offset int,
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username string,
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domain string,
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resolve bool,
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following bool,
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appendAccount func(*gtsmodel.Account),
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) error {
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if domain == "" {
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// No domain set. That means the query looked
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// like '@someone' which is not an exact search,
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// but is still a username search. Look for any
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// usernames that start with the query string.
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return p.accountsByText(
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ctx,
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requestingAccount.ID,
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maxID,
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minID,
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limit,
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offset,
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// Add @ prefix back in to indicate
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// to search function that we want
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// an account by its username.
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"@"+username,
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following,
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appendAccount,
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)
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}
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// Domain and username were both set.
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// Caller is likely trying to search for an exact
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// match, from either a remote instance or local.
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foundAccount, err := p.accountByUsernameDomain(
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ctx,
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requestingAccount,
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username,
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domain,
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resolve,
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)
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if err != nil {
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// Check for semi-expected error types.
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// On one of these, we can continue.
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if !gtserror.IsUnretrievable(err) && !gtserror.IsWrongType(err) {
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err = gtserror.Newf("error looking up @%s@%s as account: %w", username, domain, err)
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return gtserror.NewErrorInternalError(err)
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}
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} else {
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appendAccount(foundAccount)
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}
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return nil
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}
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// accountByUsernameDomain looks for one account with the given
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// username and domain. If domain is empty, or equal to our domain,
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// search will be confined to local accounts.
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//
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// Will return either a hit, an ErrNotRetrievable, an ErrWrongType,
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// or a real error that the caller should handle.
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func (p *Processor) accountByUsernameDomain(
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ctx context.Context,
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requestingAccount *gtsmodel.Account,
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username string,
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domain string,
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resolve bool,
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) (*gtsmodel.Account, error) {
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var usernameDomain string
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if domain == "" || domain == config.GetHost() || domain == config.GetAccountDomain() {
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// Local lookup, normalize domain.
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domain = ""
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usernameDomain = username
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} else {
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// Remote lookup.
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usernameDomain = username + "@" + domain
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// Ensure domain not blocked.
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blocked, err := p.state.DB.IsDomainBlocked(ctx, domain)
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if err != nil {
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err = gtserror.Newf("error checking domain block: %w", err)
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return nil, gtserror.NewErrorInternalError(err)
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} else if blocked {
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// Don't search on blocked domain.
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err = gtserror.New("domain blocked")
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return nil, gtserror.SetUnretrievable(err)
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}
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}
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if resolve {
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// We're allowed to resolve, leave the
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// rest up to the dereferencer functions.
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account, _, err := p.federator.GetAccountByUsernameDomain(
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gtscontext.SetFastFail(ctx),
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requestingAccount.Username,
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username, domain,
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)
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return account, err
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}
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// We're not allowed to resolve. Search the database
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// for existing account with given username + domain.
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account, err := p.state.DB.GetAccountByUsernameDomain(ctx, username, domain)
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if err != nil && !errors.Is(err, db.ErrNoEntries) {
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err = gtserror.Newf("error checking database for account %s: %w", usernameDomain, err)
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return nil, err
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}
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if account != nil {
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// We got a hit! No need to continue.
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return account, nil
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}
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err = fmt.Errorf("account %s could not be retrieved locally and we cannot resolve", usernameDomain)
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return nil, gtserror.SetUnretrievable(err)
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}
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// byURI looks for account(s) or a status with the given URI
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// set as either its URL or ActivityPub URI. If it gets hits, it
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// will call the provided append functions to return results.
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//
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// The boolean return value indicates to the caller whether the
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// search should continue (true) or stop (false). False will be
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// returned in cases where a hit has been found, the domain of the
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// searched URI is blocked, or an unrecoverable error has occurred.
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func (p *Processor) byURI(
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ctx context.Context,
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requestingAccount *gtsmodel.Account,
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uri *url.URL,
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queryType string,
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resolve bool,
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appendAccount func(*gtsmodel.Account),
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appendStatus func(*gtsmodel.Status),
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) error {
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blocked, err := p.state.DB.IsURIBlocked(ctx, uri)
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if err != nil {
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err = gtserror.Newf("error checking domain block: %w", err)
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return gtserror.NewErrorInternalError(err)
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}
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if blocked {
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// Don't search for
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// blocked domains.
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return nil
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}
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if includeAccounts(queryType) {
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// Check if URI points to an account.
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foundAccount, err := p.accountByURI(ctx, requestingAccount, uri, resolve)
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if err != nil {
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// Check for semi-expected error types.
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// On one of these, we can continue.
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if !gtserror.IsUnretrievable(err) && !gtserror.IsWrongType(err) {
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err = gtserror.Newf("error looking up %s as account: %w", uri, err)
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return gtserror.NewErrorInternalError(err)
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}
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} else {
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// Hit! Return early since it's extremely unlikely
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// a status and an account will have the same URL.
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appendAccount(foundAccount)
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return nil
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}
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}
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if includeStatuses(queryType) {
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// Check if URI points to a status.
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foundStatus, err := p.statusByURI(ctx, requestingAccount, uri, resolve)
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if err != nil {
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// Check for semi-expected error types.
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// On one of these, we can continue.
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if !gtserror.IsUnretrievable(err) && !gtserror.IsWrongType(err) {
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err = gtserror.Newf("error looking up %s as status: %w", uri, err)
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return gtserror.NewErrorInternalError(err)
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}
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} else {
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// Hit! Return early since it's extremely unlikely
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// a status and an account will have the same URL.
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appendStatus(foundStatus)
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return nil
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}
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}
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// No errors, but no hits
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// either; that's fine.
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return nil
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}
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// accountByURI looks for one account with the given URI.
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// If resolve is false, it will only look in the database.
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// If resolve is true, it will try to resolve the account
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|
// from remote using the URI, if necessary.
|
|
//
|
|
// Will return either a hit, ErrNotRetrievable, ErrWrongType,
|
|
// or a real error that the caller should handle.
|
|
func (p *Processor) accountByURI(
|
|
ctx context.Context,
|
|
requestingAccount *gtsmodel.Account,
|
|
uri *url.URL,
|
|
resolve bool,
|
|
) (*gtsmodel.Account, error) {
|
|
if resolve {
|
|
// We're allowed to resolve, leave the
|
|
// rest up to the dereferencer functions.
|
|
account, _, err := p.federator.GetAccountByURI(
|
|
gtscontext.SetFastFail(ctx),
|
|
requestingAccount.Username,
|
|
uri,
|
|
)
|
|
|
|
return account, err
|
|
}
|
|
|
|
// We're not allowed to resolve; search database only.
|
|
uriStr := uri.String() // stringify uri just once
|
|
|
|
// Search by ActivityPub URI.
|
|
account, err := p.state.DB.GetAccountByURI(ctx, uriStr)
|
|
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
|
err = gtserror.Newf("error checking database for account using URI %s: %w", uriStr, err)
|
|
return nil, err
|
|
}
|
|
|
|
if account != nil {
|
|
// We got a hit! No need to continue.
|
|
return account, nil
|
|
}
|
|
|
|
// No hit yet. Fallback to try by URL.
|
|
account, err = p.state.DB.GetAccountByURL(ctx, uriStr)
|
|
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
|
err = gtserror.Newf("error checking database for account using URL %s: %w", uriStr, err)
|
|
return nil, err
|
|
}
|
|
|
|
if account != nil {
|
|
// We got a hit! No need to continue.
|
|
return account, nil
|
|
}
|
|
|
|
err = fmt.Errorf("account %s could not be retrieved locally and we cannot resolve", uriStr)
|
|
return nil, gtserror.SetUnretrievable(err)
|
|
}
|
|
|
|
// statusByURI looks for one status with the given URI.
|
|
// If resolve is false, it will only look in the database.
|
|
// If resolve is true, it will try to resolve the status
|
|
// from remote using the URI, if necessary.
|
|
//
|
|
// Will return either a hit, ErrNotRetrievable, ErrWrongType,
|
|
// or a real error that the caller should handle.
|
|
func (p *Processor) statusByURI(
|
|
ctx context.Context,
|
|
requestingAccount *gtsmodel.Account,
|
|
uri *url.URL,
|
|
resolve bool,
|
|
) (*gtsmodel.Status, error) {
|
|
if resolve {
|
|
// We're allowed to resolve, leave the
|
|
// rest up to the dereferencer functions.
|
|
status, _, err := p.federator.GetStatusByURI(
|
|
gtscontext.SetFastFail(ctx),
|
|
requestingAccount.Username,
|
|
uri,
|
|
)
|
|
return status, err
|
|
}
|
|
|
|
// We're not allowed to resolve; search database only.
|
|
uriStr := uri.String() // stringify uri just once
|
|
|
|
// Search by ActivityPub URI.
|
|
status, err := p.state.DB.GetStatusByURI(ctx, uriStr)
|
|
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
|
err = gtserror.Newf("error checking database for status using URI %s: %w", uriStr, err)
|
|
return nil, err
|
|
}
|
|
|
|
if status != nil {
|
|
// We got a hit! No need to continue.
|
|
return status, nil
|
|
}
|
|
|
|
// No hit yet. Fallback to try by URL.
|
|
status, err = p.state.DB.GetStatusByURL(ctx, uriStr)
|
|
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
|
err = gtserror.Newf("error checking database for status using URL %s: %w", uriStr, err)
|
|
return nil, err
|
|
}
|
|
|
|
if status != nil {
|
|
// We got a hit! No need to continue.
|
|
return status, nil
|
|
}
|
|
|
|
err = fmt.Errorf("status %s could not be retrieved locally and we cannot resolve", uriStr)
|
|
return nil, gtserror.SetUnretrievable(err)
|
|
}
|
|
|
|
func (p *Processor) hashtag(
|
|
ctx context.Context,
|
|
maxID string,
|
|
minID string,
|
|
limit int,
|
|
offset int,
|
|
query string,
|
|
queryType string,
|
|
appendTag func(*gtsmodel.Tag),
|
|
) (bool, error) {
|
|
if query[0] != '#' {
|
|
// Query doesn't look like a hashtag,
|
|
// but if we're being instructed to
|
|
// look explicitly *only* for hashtags,
|
|
// let's be generous and assume caller
|
|
// just left out the hash prefix.
|
|
|
|
if queryType != queryTypeHashtags {
|
|
// Nope, search isn't explicitly
|
|
// for hashtags, keep looking.
|
|
return true, nil
|
|
}
|
|
|
|
// Search is explicitly for
|
|
// tags, let this one through.
|
|
} else if !includeHashtags(queryType) {
|
|
// Query looks like a hashtag,
|
|
// but we're not meant to include
|
|
// hashtags in the results.
|
|
//
|
|
// Indicate to caller they should
|
|
// stop looking, since they're not
|
|
// going to get results for this by
|
|
// looking in any other way.
|
|
return false, nil
|
|
}
|
|
|
|
// Query looks like a hashtag, and we're allowed
|
|
// to search for hashtags.
|
|
//
|
|
// Ensure this is a valid tag for our instance.
|
|
normalized, ok := text.NormalizeHashtag(query)
|
|
if !ok {
|
|
// Couldn't normalize/not a
|
|
// valid hashtag after all.
|
|
// Caller should stop looking.
|
|
return false, nil
|
|
}
|
|
|
|
// Search for tags starting with the normalized string.
|
|
tags, err := p.state.DB.SearchForTags(
|
|
ctx,
|
|
normalized,
|
|
maxID,
|
|
minID,
|
|
limit,
|
|
offset,
|
|
)
|
|
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
|
err := gtserror.Newf(
|
|
"error checking database for tags using text %s: %w",
|
|
normalized, err,
|
|
)
|
|
return false, err
|
|
}
|
|
|
|
// Return whatever we got.
|
|
for _, tag := range tags {
|
|
appendTag(tag)
|
|
}
|
|
|
|
return false, nil
|
|
}
|
|
|
|
// byText searches in the database for accounts and/or
|
|
// statuses containing the given query string, using
|
|
// the provided parameters.
|
|
//
|
|
// If queryType is any (empty string), both accounts
|
|
// and statuses will be searched, else only the given
|
|
// queryType of item will be returned.
|
|
func (p *Processor) byText(
|
|
ctx context.Context,
|
|
requestingAccount *gtsmodel.Account,
|
|
maxID string,
|
|
minID string,
|
|
limit int,
|
|
offset int,
|
|
query string,
|
|
queryType string,
|
|
following bool,
|
|
appendAccount func(*gtsmodel.Account),
|
|
appendStatus func(*gtsmodel.Status),
|
|
) error {
|
|
if queryType == queryTypeAny {
|
|
// If search type is any, ignore maxID and minID
|
|
// parameters, since we can't use them to page
|
|
// on both accounts and statuses simultaneously.
|
|
maxID = ""
|
|
minID = ""
|
|
}
|
|
|
|
if includeAccounts(queryType) {
|
|
// Search for accounts using the given text.
|
|
if err := p.accountsByText(ctx,
|
|
requestingAccount.ID,
|
|
maxID,
|
|
minID,
|
|
limit,
|
|
offset,
|
|
query,
|
|
following,
|
|
appendAccount,
|
|
); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if includeStatuses(queryType) {
|
|
// Search for statuses using the given text.
|
|
if err := p.statusesByText(ctx,
|
|
requestingAccount.ID,
|
|
maxID,
|
|
minID,
|
|
limit,
|
|
offset,
|
|
query,
|
|
appendStatus,
|
|
); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// accountsByText searches in the database for limit
|
|
// number of accounts using the given query text.
|
|
func (p *Processor) accountsByText(
|
|
ctx context.Context,
|
|
requestingAccountID string,
|
|
maxID string,
|
|
minID string,
|
|
limit int,
|
|
offset int,
|
|
query string,
|
|
following bool,
|
|
appendAccount func(*gtsmodel.Account),
|
|
) error {
|
|
accounts, err := p.state.DB.SearchForAccounts(
|
|
ctx,
|
|
requestingAccountID,
|
|
query, maxID, minID, limit, following, offset)
|
|
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
|
return gtserror.Newf("error checking database for accounts using text %s: %w", query, err)
|
|
}
|
|
|
|
for _, account := range accounts {
|
|
appendAccount(account)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// statusesByText searches in the database for limit
|
|
// number of statuses using the given query text.
|
|
func (p *Processor) statusesByText(
|
|
ctx context.Context,
|
|
requestingAccountID string,
|
|
maxID string,
|
|
minID string,
|
|
limit int,
|
|
offset int,
|
|
query string,
|
|
appendStatus func(*gtsmodel.Status),
|
|
) error {
|
|
statuses, err := p.state.DB.SearchForStatuses(
|
|
ctx,
|
|
requestingAccountID,
|
|
query, maxID, minID, limit, offset)
|
|
if err != nil && !errors.Is(err, db.ErrNoEntries) {
|
|
return gtserror.Newf("error checking database for statuses using text %s: %w", query, err)
|
|
}
|
|
|
|
for _, status := range statuses {
|
|
appendStatus(status)
|
|
}
|
|
|
|
return nil
|
|
}
|