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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 bundb
import (
"context"
"database/sql"
"net/url"
"strings"
"github.com/superseriousbusiness/gotosocial/internal/cache"
"github.com/superseriousbusiness/gotosocial/internal/config"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/uptrace/bun"
"golang.org/x/net/idna"
)
type domainDB struct {
conn *DBConn
cache *cache.DomainBlockCache
}
// normalizeDomain converts the given domain to lowercase
// then to punycode (for international domain names).
//
// Returns the resulting domain or an error if the
// punycode conversion fails.
func normalizeDomain(domain string) (out string, err error) {
out = strings.ToLower(domain)
out, err = idna.ToASCII(out)
return out, err
}
func (d *domainDB) CreateDomainBlock(ctx context.Context, block *gtsmodel.DomainBlock) db.Error {
domain, err := normalizeDomain(block.Domain)
if err != nil {
return err
}
block.Domain = domain
// Attempt to insert new domain block
if _, err := d.conn.NewInsert().
Model(block).
Exec(ctx); err != nil {
return d.conn.ProcessError(err)
}
// Cache this domain block
d.cache.Put(block.Domain, block)
return nil
}
func (d *domainDB) GetDomainBlock(ctx context.Context, domain string) (*gtsmodel.DomainBlock, db.Error) {
var err error
domain, err = normalizeDomain(domain)
if err != nil {
return nil, err
}
// Check for easy case, domain referencing *us*
if domain == "" || domain == config.GetAccountDomain() {
return nil, db.ErrNoEntries
}
// Check for already cached rblock
if block, ok := d.cache.GetByDomain(domain); ok {
// A 'nil' return value is a sentinel value for no block
if block == nil {
return nil, db.ErrNoEntries
}
// Else, this block exists
return block, nil
}
block := >smodel.DomainBlock{}
q := d.conn.
NewSelect().
Model(block).
Where("? = ?", bun.Ident("domain_block.domain"), domain).
Limit(1)
// Query database for domain block
switch err := q.Scan(ctx); err {
// No error, block found
case nil:
d.cache.Put(domain, block)
return block, nil
// No error, simply not found
case sql.ErrNoRows:
d.cache.Put(domain, nil)
return nil, db.ErrNoEntries
// Any other db error
default:
return nil, d.conn.ProcessError(err)
}
}
func (d *domainDB) DeleteDomainBlock(ctx context.Context, domain string) db.Error {
var err error
domain, err = normalizeDomain(domain)
if err != nil {
return err
}
// Attempt to delete domain block
if _, err := d.conn.NewDelete().
Model((*gtsmodel.DomainBlock)(nil)).
Where("? = ?", bun.Ident("domain_block.domain"), domain).
Exec(ctx); err != nil {
return d.conn.ProcessError(err)
}
// Clear domain from cache
d.cache.InvalidateByDomain(domain)
return nil
}
func (d *domainDB) IsDomainBlocked(ctx context.Context, domain string) (bool, db.Error) {
block, err := d.GetDomainBlock(ctx, domain)
if err == nil || err == db.ErrNoEntries {
return (block != nil), nil
}
return false, err
}
func (d *domainDB) AreDomainsBlocked(ctx context.Context, domains []string) (bool, db.Error) {
for _, domain := range domains {
if blocked, err := d.IsDomainBlocked(ctx, domain); err != nil {
return false, err
} else if blocked {
return blocked, nil
}
}
return false, nil
}
func (d *domainDB) IsURIBlocked(ctx context.Context, uri *url.URL) (bool, db.Error) {
return d.IsDomainBlocked(ctx, uri.Hostname())
}
func (d *domainDB) AreURIsBlocked(ctx context.Context, uris []*url.URL) (bool, db.Error) {
for _, uri := range uris {
if blocked, err := d.IsDomainBlocked(ctx, uri.Hostname()); err != nil {
return false, err
} else if blocked {
return blocked, nil
}
}
return false, nil
}
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