[feature] Self-serve email change for users (#2957)

* [feature] Email change

* frontend stuff for changing email

* docs

* tests etc

* differentiate more clearly between local user+account and account

* populate user

internal/processing/admin/signupapprove.go

@@ -0,0 +1,82 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// 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 admin
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/superseriousbusiness/gotosocial/internal/ap"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/messages"
+)
+
+func (p *Processor) SignupApprove(
+	ctx context.Context,
+	adminAcct *gtsmodel.Account,
+	accountID string,
+) (*apimodel.AdminAccountInfo, gtserror.WithCode) {
+	user, err := p.state.DB.GetUserByAccountID(ctx, accountID)
+	if err != nil && !errors.Is(err, db.ErrNoEntries) {
+		err := gtserror.Newf("db error getting user for account id %s: %w", accountID, err)
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	if user == nil {
+		err := fmt.Errorf("user for account %s not found", accountID)
+		return nil, gtserror.NewErrorNotFound(err, err.Error())
+	}
+
+	// Get a lock on the account URI,
+	// to ensure it's not also being
+	// rejected at the same time!
+	unlock := p.state.ProcessingLocks.Lock(user.Account.URI)
+	defer unlock()
+
+	if !*user.Approved {
+		// Process approval side effects asynschronously.
+		p.state.Workers.Client.Queue.Push(&messages.FromClientAPI{
+			// Use ap.ObjectProfile here to
+			// distinguish this message (user model)
+			// from ap.ActorPerson (account model).
+			APObjectType:   ap.ObjectProfile,
+			APActivityType: ap.ActivityAccept,
+			GTSModel:       user,
+			Origin:         adminAcct,
+			Target:         user.Account,
+		})
+	}
+
+	apiAccount, err := p.converter.AccountToAdminAPIAccount(ctx, user.Account)
+	if err != nil {
+		err := gtserror.Newf("error converting account %s to admin api model: %w", accountID, err)
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	// Optimistically set approved to true and
+	// clear sign-up IP to reflect state that
+	// will be produced by side effects.
+	apiAccount.Approved = true
+	apiAccount.IP = nil
+
+	return apiAccount, nil
+}