mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2025-11-03 18:12:25 -06:00
2796a2e82f* update go-fed * do the things * remove unused columns from tags * update to latest lingo from main * further tag shenanigans * serve stub page at tag endpoint * we did it lads * tests, oh tests, ohhh tests, oh tests (doo doo doo doo) * swagger docs * document hashtag usage + federation * instanceGet * don't bother parsing tag href * rename whereStartsWith -> whereStartsLike * remove GetOrCreateTag * dont cache status tag timelineability
134 lines
3.6 KiB
Go
134 lines
3.6 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 bundb
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import (
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"strings"
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"github.com/superseriousbusiness/gotosocial/internal/db"
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"github.com/uptrace/bun"
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)
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// likeEscaper is a thread-safe string replacer which escapes
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// common SQLite + Postgres `LIKE` wildcard chars using the
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// escape character `\`. Initialized as a var in this package
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// so it can be reused.
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var likeEscaper = strings.NewReplacer(
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`\`, `\\`, // Escape char.
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`%`, `\%`, // Zero or more char.
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`_`, `\_`, // Exactly one char.
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)
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// whereLike appends a WHERE clause to the
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// given SelectQuery, which searches for
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// matches of `search` in the given subQuery
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// using LIKE.
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func whereLike(
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query *bun.SelectQuery,
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subject interface{},
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search string,
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) *bun.SelectQuery {
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// Escape existing wildcard + escape
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// chars in the search query string.
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search = likeEscaper.Replace(search)
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// Add our own wildcards back in; search
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// zero or more chars around the query.
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search = `%` + search + `%`
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// Append resulting WHERE
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// clause to the main query.
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return query.Where(
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"(?) LIKE ? ESCAPE ?",
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subject, search, `\`,
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)
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}
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// whereStartsLike is like whereLike,
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// but only searches for strings that
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// START WITH `search`.
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func whereStartsLike(
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query *bun.SelectQuery,
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subject interface{},
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search string,
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) *bun.SelectQuery {
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// Escape existing wildcard + escape
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// chars in the search query string.
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search = likeEscaper.Replace(search)
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// Add our own wildcards back in; search
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// zero or more chars after the query.
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search += `%`
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// Append resulting WHERE
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// clause to the main query.
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return query.Where(
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"(?) LIKE ? ESCAPE ?",
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subject, search, `\`,
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)
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}
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// updateWhere parses []db.Where and adds it to the given update query.
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func updateWhere(q *bun.UpdateQuery, where []db.Where) {
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for _, w := range where {
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query, args := parseWhere(w)
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q = q.Where(query, args...)
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}
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}
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// selectWhere parses []db.Where and adds it to the given select query.
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func selectWhere(q *bun.SelectQuery, where []db.Where) {
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for _, w := range where {
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query, args := parseWhere(w)
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q = q.Where(query, args...)
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}
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}
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// deleteWhere parses []db.Where and adds it to the given where query.
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func deleteWhere(q *bun.DeleteQuery, where []db.Where) {
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for _, w := range where {
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query, args := parseWhere(w)
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q = q.Where(query, args...)
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}
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}
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// parseWhere looks through the options on a single db.Where entry, and
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// returns the appropriate query string and arguments.
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func parseWhere(w db.Where) (query string, args []interface{}) {
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if w.Not {
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if w.Value == nil {
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query = "? IS NOT NULL"
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args = []interface{}{bun.Ident(w.Key)}
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return
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}
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query = "? != ?"
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args = []interface{}{bun.Ident(w.Key), w.Value}
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return
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}
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if w.Value == nil {
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query = "? IS NULL"
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args = []interface{}{bun.Ident(w.Key)}
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return
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}
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query = "? = ?"
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args = []interface{}{bun.Ident(w.Key), w.Value}
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return
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}
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