[feature] Account alias / move API + db models (#2518)

* [feature] Account alias / move API + db models

* go fmt

* fix little cherry-pick issues

* update error checking, formatting

* add and use new util functions to simplify alias logic

1 files changed, 97 insertions, 0 deletions

diff --git a/internal/api/client/accounts/accountmove.go b/internal/api/client/accounts/accountmove.go
new file mode 100644
index 000000000..3698c06a3
--- /dev/null
+++ b/internal/api/client/accounts/accountmove.go
@@ -0,0 +1,97 @@
+// 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 accounts
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	apiutil "github.com/superseriousbusiness/gotosocial/internal/api/util"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// AccountMovePOSTHandler swagger:operation POST /api/v1/accounts/move accountMove
+//
+// Move your account to another account.
+//
+//	---
+//	tags:
+//	- accounts
+//
+//	consumes:
+//	- multipart/form-data
+//
+//	parameters:
+//	-
+//		name: password
+//		in: formData
+//		description: Password of the account user, for confirmation.
+//		type: string
+//		required: true
+//	-
+//		name: moved_to_uri
+//		in: formData
+//		description: >-
+//			ActivityPub URI/ID of the target account. Eg., `https://example.org/users/some_account`.
+//			The target account must be alsoKnownAs the requesting account in order for the move to be successful.
+//		type: string
+//		required: true
+//
+//	security:
+//	- OAuth2 Bearer:
+//		- write:accounts
+//
+//	responses:
+//		'202':
+//			description: The account move has been accepted and the account will be moved.
+//		'400':
+//			description: bad request
+//		'401':
+//			description: unauthorized
+//		'404':
+//			description: not found
+//		'406':
+//			description: not acceptable
+//		'422':
+//			description: Unprocessable. Check the response body for more details.
+//		'500':
+//			description: internal server error
+func (m *Module) AccountMovePOSTHandler(c *gin.Context) {
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		apiutil.ErrorHandler(c, gtserror.NewErrorUnauthorized(err, err.Error()), m.processor.InstanceGetV1)
+		return
+	}
+
+	form := &apimodel.AccountMoveRequest{}
+	if err := c.ShouldBind(&form); err != nil {
+		apiutil.ErrorHandler(c, gtserror.NewErrorBadRequest(err, err.Error()), m.processor.InstanceGetV1)
+		return
+	}
+
+	if errWithCode := m.processor.Account().MoveSelf(c.Request.Context(), authed, form); errWithCode != nil {
+		apiutil.ErrorHandler(c, errWithCode, m.processor.InstanceGetV1)
+		return
+	}
+
+	apiutil.JSON(c, http.StatusAccepted, map[string]string{
+		"message": "accepted",
+	})
+}