[feature] Federate local account deletion (#431)

* add account delete to API

* model account delete request

* add AccountDeleteLocal

* federate local account deletes

* add DeleteLocal

* update transport (controller) to allow shortcuts

* delete logic + testing

* update swagger docs

* more tests + fixes

internal/api/client/account/accountdelete.go

@@ -0,0 +1,90 @@
+/*
+   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 account
+
+import (
+	"net/http"
+
+	"github.com/sirupsen/logrus"
+
+	"github.com/gin-gonic/gin"
+	"github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// AccountDeletePOSTHandler swagger:operation POST /api/v1/accounts/delete accountDelete
+//
+// Delete your account.
+//
+// ---
+// tags:
+// - accounts
+//
+// consumes:
+// - multipart/form-data
+//
+// parameters:
+// - name: password
+//   in: formData
+//   description: Password of the account user, for confirmation.
+//   type: string
+//   required: true
+//
+// security:
+// - OAuth2 Bearer:
+//   - write:accounts
+//
+// responses:
+//   '202':
+//     description: "The account deletion has been accepted and the account will be deleted."
+//   '400':
+//      description: bad request
+//   '401':
+//      description: unauthorized
+func (m *Module) AccountDeletePOSTHandler(c *gin.Context) {
+	l := logrus.WithField("func", "AccountDeletePOSTHandler")
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("couldn't auth: %s", err)
+		c.JSON(http.StatusUnauthorized, gin.H{"error": err.Error()})
+		return
+	}
+	l.Tracef("retrieved account %+v", authed.Account.ID)
+
+	form := &model.AccountDeleteRequest{}
+	if err := c.ShouldBind(&form); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	if form.Password == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no password provided in account delete request"})
+		return
+	}
+
+	form.DeleteOriginID = authed.Account.ID
+
+	if errWithCode := m.processor.AccountDeleteLocal(c.Request.Context(), authed, form); errWithCode != nil {
+		l.Debugf("could not delete account: %s", errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	c.JSON(http.StatusAccepted, gin.H{"message": "accepted"})
+}