[performance] add user cache and database (#879)

* go fmt

* add + use user cache and database

* fix import

* update tests

* remove unused relation

internal/db/bundb/user_test.go

@@ -0,0 +1,73 @@
+/*
+   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_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+type UserTestSuite struct {
+	BunDBStandardTestSuite
+}
+
+func (suite *UserTestSuite) TestGetUser() {
+	user, err := suite.db.GetUserByID(context.Background(), suite.testUsers["local_account_1"].ID)
+	suite.NoError(err)
+	suite.NotNil(user)
+}
+
+func (suite *UserTestSuite) TestGetUserByEmailAddress() {
+	user, err := suite.db.GetUserByEmailAddress(context.Background(), suite.testUsers["local_account_1"].Email)
+	suite.NoError(err)
+	suite.NotNil(user)
+}
+
+func (suite *UserTestSuite) TestGetUserByAccountID() {
+	user, err := suite.db.GetUserByAccountID(context.Background(), suite.testAccounts["local_account_1"].ID)
+	suite.NoError(err)
+	suite.NotNil(user)
+}
+
+func (suite *UserTestSuite) TestUpdateUserSelectedColumns() {
+	testUser := suite.testUsers["local_account_1"]
+	user := &gtsmodel.User{
+		ID:     testUser.ID,
+		Email:  "whatever",
+		Locale: "es",
+	}
+
+	user, err := suite.db.UpdateUser(context.Background(), user, "email", "locale")
+	suite.NoError(err)
+	suite.NotNil(user)
+
+	dbUser, err := suite.db.GetUserByID(context.Background(), testUser.ID)
+	suite.NoError(err)
+	suite.NotNil(dbUser)
+	suite.Equal("whatever", dbUser.Email)
+	suite.Equal("es", dbUser.Locale)
+	suite.Equal(testUser.AccountID, dbUser.AccountID)
+}
+
+func TestUserTestSuite(t *testing.T) {
+	suite.Run(t, new(UserTestSuite))
+}