Pg to bun (#148)

* start moving to bun

* changing more stuff

* more

* and yet more

* tests passing

* seems stable now

* more big changes

* small fix

* little fixes

internal/db/bundb/basic.go

@@ -0,0 +1,179 @@
+/*
+   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 bundb
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/uptrace/bun"
+)
+
+type basicDB struct {
+	config *config.Config
+	conn   *bun.DB
+	log    *logrus.Logger
+}
+
+func (b *basicDB) Put(ctx context.Context, i interface{}) db.Error {
+	_, err := b.conn.NewInsert().Model(i).Exec(ctx)
+	if err != nil && strings.Contains(err.Error(), "duplicate key value violates unique constraint") {
+		return db.ErrAlreadyExists
+	}
+	return err
+}
+
+func (b *basicDB) GetByID(ctx context.Context, id string, i interface{}) db.Error {
+	q := b.conn.
+		NewSelect().
+		Model(i).
+		Where("id = ?", id)
+
+	return processErrorResponse(q.Scan(ctx))
+}
+
+func (b *basicDB) GetWhere(ctx context.Context, where []db.Where, i interface{}) db.Error {
+	if len(where) == 0 {
+		return errors.New("no queries provided")
+	}
+
+	q := b.conn.NewSelect().Model(i)
+	for _, w := range where {
+
+		if w.Value == nil {
+			q = q.Where("? IS NULL", bun.Ident(w.Key))
+		} else {
+			if w.CaseInsensitive {
+				q = q.Where("LOWER(?) = LOWER(?)", bun.Safe(w.Key), w.Value)
+			} else {
+				q = q.Where("? = ?", bun.Safe(w.Key), w.Value)
+			}
+		}
+	}
+
+	return processErrorResponse(q.Scan(ctx))
+}
+
+func (b *basicDB) GetAll(ctx context.Context, i interface{}) db.Error {
+	q := b.conn.
+		NewSelect().
+		Model(i)
+
+	return processErrorResponse(q.Scan(ctx))
+}
+
+func (b *basicDB) DeleteByID(ctx context.Context, id string, i interface{}) db.Error {
+	q := b.conn.
+		NewDelete().
+		Model(i).
+		Where("id = ?", id)
+
+	_, err := q.Exec(ctx)
+
+	return processErrorResponse(err)
+}
+
+func (b *basicDB) DeleteWhere(ctx context.Context, where []db.Where, i interface{}) db.Error {
+	if len(where) == 0 {
+		return errors.New("no queries provided")
+	}
+
+	q := b.conn.
+		NewDelete().
+		Model(i)
+
+	for _, w := range where {
+		q = q.Where("? = ?", bun.Safe(w.Key), w.Value)
+	}
+
+	_, err := q.Exec(ctx)
+
+	return processErrorResponse(err)
+}
+
+func (b *basicDB) UpdateByID(ctx context.Context, id string, i interface{}) db.Error {
+	q := b.conn.
+		NewUpdate().
+		Model(i).
+		WherePK()
+
+	_, err := q.Exec(ctx)
+
+	return processErrorResponse(err)
+}
+
+func (b *basicDB) UpdateOneByID(ctx context.Context, id string, key string, value interface{}, i interface{}) db.Error {
+	q := b.conn.NewUpdate().
+		Model(i).
+		Set("? = ?", bun.Safe(key), value).
+		WherePK()
+
+	_, err := q.Exec(ctx)
+
+	return processErrorResponse(err)
+}
+
+func (b *basicDB) UpdateWhere(ctx context.Context, where []db.Where, key string, value interface{}, i interface{}) db.Error {
+	q := b.conn.NewUpdate().Model(i)
+
+	for _, w := range where {
+		if w.Value == nil {
+			q = q.Where("? IS NULL", bun.Ident(w.Key))
+		} else {
+			if w.CaseInsensitive {
+				q = q.Where("LOWER(?) = LOWER(?)", bun.Safe(w.Key), w.Value)
+			} else {
+				q = q.Where("? = ?", bun.Safe(w.Key), w.Value)
+			}
+		}
+	}
+
+	q = q.Set("? = ?", bun.Safe(key), value)
+
+	_, err := q.Exec(ctx)
+
+	return processErrorResponse(err)
+}
+
+func (b *basicDB) CreateTable(ctx context.Context, i interface{}) db.Error {
+	_, err := b.conn.NewCreateTable().Model(i).IfNotExists().Exec(ctx)
+	return err
+}
+
+func (b *basicDB) DropTable(ctx context.Context, i interface{}) db.Error {
+	_, err := b.conn.NewDropTable().Model(i).IfExists().Exec(ctx)
+	return processErrorResponse(err)
+}
+
+func (b *basicDB) IsHealthy(ctx context.Context) db.Error {
+	return b.conn.Ping()
+}
+
+func (b *basicDB) Stop(ctx context.Context) db.Error {
+	b.log.Info("closing db connection")
+	if err := b.conn.Close(); err != nil {
+		// only cancel if there's a problem closing the db
+		return err
+	}
+	return nil
+}