[feature] Admin accounts endpoints; approve/reject sign-ups (#2826)

* update settings panels, add pending overview + approve/deny functions

* add admin accounts get, approve, reject

* send approved/rejected emails

* use signup URL

* docs!

* email

* swagger

* web linting

* fix email tests

* wee lil fixerinos

* use new paging logic for GetAccounts() series of admin endpoints, small changes to query building

* shuffle useAccountIDIn check *before* adding to query

* fix parse from toot react error

* use `netip.Addr`

* put valid slices in globals

* optimistic updates for account state

---------

Co-authored-by: kim <grufwub@gmail.com>

internal/processing/admin/accountaction.go

@@ -0,0 +1,102 @@
+// 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"
+	"fmt"
+
+	"github.com/superseriousbusiness/gotosocial/internal/ap"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+	"github.com/superseriousbusiness/gotosocial/internal/messages"
+)
+
+func (p *Processor) AccountAction(
+	ctx context.Context,
+	adminAcct *gtsmodel.Account,
+	request *apimodel.AdminActionRequest,
+) (string, gtserror.WithCode) {
+	targetAcct, err := p.state.DB.GetAccountByID(ctx, request.TargetID)
+	if err != nil {
+		err := gtserror.Newf("db error getting target account: %w", err)
+		return "", gtserror.NewErrorInternalError(err)
+	}
+
+	switch gtsmodel.NewAdminActionType(request.Type) {
+	case gtsmodel.AdminActionSuspend:
+		return p.accountActionSuspend(ctx, adminAcct, targetAcct, request.Text)
+
+	default:
+		// TODO: add more types to this slice when adding
+		//       more types to the switch statement above.
+		supportedTypes := []string{
+			gtsmodel.AdminActionSuspend.String(),
+		}
+
+		err := fmt.Errorf(
+			"admin action type %s is not supported for this endpoint, "+
+				"currently supported types are: %q",
+			request.Type, supportedTypes)
+
+		return "", gtserror.NewErrorBadRequest(err, err.Error())
+	}
+}
+
+func (p *Processor) accountActionSuspend(
+	ctx context.Context,
+	adminAcct *gtsmodel.Account,
+	targetAcct *gtsmodel.Account,
+	text string,
+) (string, gtserror.WithCode) {
+	actionID := id.NewULID()
+
+	errWithCode := p.actions.Run(
+		ctx,
+		&gtsmodel.AdminAction{
+			ID:             actionID,
+			TargetCategory: gtsmodel.AdminActionCategoryAccount,
+			TargetID:       targetAcct.ID,
+			Target:         targetAcct,
+			Type:           gtsmodel.AdminActionSuspend,
+			AccountID:      adminAcct.ID,
+			Text:           text,
+		},
+		func(ctx context.Context) gtserror.MultiError {
+			if err := p.state.Workers.ProcessFromClientAPI(
+				ctx,
+				messages.FromClientAPI{
+					APObjectType:   ap.ActorPerson,
+					APActivityType: ap.ActivityDelete,
+					OriginAccount:  adminAcct,
+					TargetAccount:  targetAcct,
+				},
+			); err != nil {
+				errs := gtserror.NewMultiError(1)
+				errs.Append(err)
+				return errs
+			}
+
+			return nil
+		},
+	)
+
+	return actionID, errWithCode
+}