Blocklist import (#77)

* first steps on importing blocklists

* unblock domains properly

internal/db/pg/delete.go

@@ -0,0 +1,57 @@
+/*
+   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 pg
+
+import (
+	"errors"
+
+	"github.com/go-pg/pg/v10"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+)
+
+func (ps *postgresService) DeleteByID(id string, i interface{}) error {
+	if _, err := ps.conn.Model(i).Where("id = ?", id).Delete(); err != nil {
+		// if there are no rows *anyway* then that's fine
+		// just return err if there's an actual error
+		if err != pg.ErrNoRows {
+			return err
+		}
+	}
+	return nil
+}
+
+func (ps *postgresService) DeleteWhere(where []db.Where, i interface{}) error {
+	if len(where) == 0 {
+		return errors.New("no queries provided")
+	}
+
+	q := ps.conn.Model(i)
+	for _, w := range where {
+		q = q.Where("? = ?", pg.Safe(w.Key), w.Value)
+	}
+
+	if _, err := q.Delete(); err != nil {
+		// if there are no rows *anyway* then that's fine
+		// just return err if there's an actual error
+		if err != pg.ErrNoRows {
+			return err
+		}
+	}
+	return nil
+}