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/admin.go

@@ -0,0 +1,272 @@
+/*
+   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"
+	"crypto/rand"
+	"crypto/rsa"
+	"database/sql"
+	"fmt"
+	"net"
+	"net/mail"
+	"strings"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+	"github.com/uptrace/bun"
+	"golang.org/x/crypto/bcrypt"
+)
+
+type adminDB struct {
+	config *config.Config
+	conn   *bun.DB
+	log    *logrus.Logger
+}
+
+func (a *adminDB) IsUsernameAvailable(ctx context.Context, username string) (bool, db.Error) {
+	q := a.conn.
+		NewSelect().
+		Model(&gtsmodel.Account{}).
+		Where("username = ?", username).
+		Where("domain = ?", nil)
+
+	return notExists(ctx, q)
+}
+
+func (a *adminDB) IsEmailAvailable(ctx context.Context, email string) (bool, db.Error) {
+	// parse the domain from the email
+	m, err := mail.ParseAddress(email)
+	if err != nil {
+		return false, fmt.Errorf("error parsing email address %s: %s", email, err)
+	}
+	domain := strings.Split(m.Address, "@")[1] // domain will always be the second part after @
+
+	// check if the email domain is blocked
+	if err := a.conn.
+		NewSelect().
+		Model(&gtsmodel.EmailDomainBlock{}).
+		Where("domain = ?", domain).
+		Scan(ctx); err == nil {
+		// fail because we found something
+		return false, fmt.Errorf("email domain %s is blocked", domain)
+	} else if err != sql.ErrNoRows {
+		return false, processErrorResponse(err)
+	}
+
+	// check if this email is associated with a user already
+	q := a.conn.
+		NewSelect().
+		Model(&gtsmodel.User{}).
+		Where("email = ?", email).
+		WhereOr("unconfirmed_email = ?", email)
+
+	return notExists(ctx, q)
+}
+
+func (a *adminDB) NewSignup(ctx context.Context, username string, reason string, requireApproval bool, email string, password string, signUpIP net.IP, locale string, appID string, emailVerified bool, admin bool) (*gtsmodel.User, db.Error) {
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		a.log.Errorf("error creating new rsa key: %s", err)
+		return nil, err
+	}
+
+	// if something went wrong while creating a user, we might already have an account, so check here first...
+	acct := &gtsmodel.Account{}
+	err = a.conn.NewSelect().
+		Model(acct).
+		Where("username = ?", username).
+		Where("? IS NULL", bun.Ident("domain")).
+		Scan(ctx)
+	if err != nil {
+		// we just don't have an account yet create one
+		newAccountURIs := util.GenerateURIsForAccount(username, a.config.Protocol, a.config.Host)
+		newAccountID, err := id.NewRandomULID()
+		if err != nil {
+			return nil, err
+		}
+
+		acct = &gtsmodel.Account{
+			ID:                    newAccountID,
+			Username:              username,
+			DisplayName:           username,
+			Reason:                reason,
+			URL:                   newAccountURIs.UserURL,
+			PrivateKey:            key,
+			PublicKey:             &key.PublicKey,
+			PublicKeyURI:          newAccountURIs.PublicKeyURI,
+			ActorType:             gtsmodel.ActivityStreamsPerson,
+			URI:                   newAccountURIs.UserURI,
+			InboxURI:              newAccountURIs.InboxURI,
+			OutboxURI:             newAccountURIs.OutboxURI,
+			FollowersURI:          newAccountURIs.FollowersURI,
+			FollowingURI:          newAccountURIs.FollowingURI,
+			FeaturedCollectionURI: newAccountURIs.CollectionURI,
+		}
+		if _, err = a.conn.
+			NewInsert().
+			Model(acct).
+			Exec(ctx); err != nil {
+			return nil, err
+		}
+	}
+
+	pw, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	if err != nil {
+		return nil, fmt.Errorf("error hashing password: %s", err)
+	}
+
+	newUserID, err := id.NewRandomULID()
+	if err != nil {
+		return nil, err
+	}
+
+	u := &gtsmodel.User{
+		ID:                     newUserID,
+		AccountID:              acct.ID,
+		EncryptedPassword:      string(pw),
+		SignUpIP:               signUpIP.To4(),
+		Locale:                 locale,
+		UnconfirmedEmail:       email,
+		CreatedByApplicationID: appID,
+		Approved:               !requireApproval, // if we don't require moderator approval, just pre-approve the user
+	}
+
+	if emailVerified {
+		u.ConfirmedAt = time.Now()
+		u.Email = email
+	}
+
+	if admin {
+		u.Admin = true
+		u.Moderator = true
+	}
+
+	if _, err = a.conn.
+		NewInsert().
+		Model(u).
+		Exec(ctx); err != nil {
+		return nil, err
+	}
+
+	return u, nil
+}
+
+func (a *adminDB) CreateInstanceAccount(ctx context.Context) db.Error {
+	username := a.config.Host
+
+	// check if instance account already exists
+	existsQ := a.conn.
+		NewSelect().
+		Model(&gtsmodel.Account{}).
+		Where("username = ?", username).
+		Where("? IS NULL", bun.Ident("domain"))
+	count, err := existsQ.Count(ctx)
+	if err != nil && count == 1 {
+		a.log.Infof("instance account %s already exists", username)
+		return nil
+	} else if err != sql.ErrNoRows {
+		return processErrorResponse(err)
+	}
+
+	key, err := rsa.GenerateKey(rand.Reader, 2048)
+	if err != nil {
+		a.log.Errorf("error creating new rsa key: %s", err)
+		return err
+	}
+
+	aID, err := id.NewRandomULID()
+	if err != nil {
+		return err
+	}
+
+	newAccountURIs := util.GenerateURIsForAccount(username, a.config.Protocol, a.config.Host)
+	acct := &gtsmodel.Account{
+		ID:                    aID,
+		Username:              a.config.Host,
+		DisplayName:           username,
+		URL:                   newAccountURIs.UserURL,
+		PrivateKey:            key,
+		PublicKey:             &key.PublicKey,
+		PublicKeyURI:          newAccountURIs.PublicKeyURI,
+		ActorType:             gtsmodel.ActivityStreamsPerson,
+		URI:                   newAccountURIs.UserURI,
+		InboxURI:              newAccountURIs.InboxURI,
+		OutboxURI:             newAccountURIs.OutboxURI,
+		FollowersURI:          newAccountURIs.FollowersURI,
+		FollowingURI:          newAccountURIs.FollowingURI,
+		FeaturedCollectionURI: newAccountURIs.CollectionURI,
+	}
+
+	insertQ := a.conn.
+		NewInsert().
+		Model(acct)
+
+	if _, err := insertQ.Exec(ctx); err != nil {
+		return err
+	}
+
+	a.log.Infof("instance account %s CREATED with id %s", username, acct.ID)
+	return nil
+}
+
+func (a *adminDB) CreateInstanceInstance(ctx context.Context) db.Error {
+	domain := a.config.Host
+
+	// check if instance entry already exists
+	existsQ := a.conn.
+		NewSelect().
+		Model(&gtsmodel.Instance{}).
+		Where("domain = ?", domain)
+
+	count, err := existsQ.Count(ctx)
+	if err != nil && count == 1 {
+		a.log.Infof("instance instance %s already exists", domain)
+		return nil
+	} else if err != sql.ErrNoRows {
+		return processErrorResponse(err)
+	}
+
+	iID, err := id.NewRandomULID()
+	if err != nil {
+		return err
+	}
+
+	i := &gtsmodel.Instance{
+		ID:     iID,
+		Domain: domain,
+		Title:  domain,
+		URI:    fmt.Sprintf("%s://%s", a.config.Protocol, a.config.Host),
+	}
+
+	insertQ := a.conn.
+		NewInsert().
+		Model(i)
+
+	if _, err := insertQ.Exec(ctx); err != nil {
+		return err
+	}
+	a.log.Infof("created instance instance %s with id %s", domain, i.ID)
+	return nil
+}