[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

4 files changed, 196 insertions, 2 deletions

diff --git a/internal/api/client/account/account.go b/internal/api/client/account/account.go
index c72e9fb5d..c38a8cfb4 100644
--- a/internal/api/client/account/account.go
+++ b/internal/api/client/account/account.go
@@ -71,6 +71,8 @@ const (
 	BlockPath = BasePathWithID + "/block"
 	// UnblockPath is for removing a block of an account
 	UnblockPath = BasePathWithID + "/unblock"
+	// DeleteAccountPath is for deleting one's account via the API
+	DeleteAccountPath = BasePath + "/delete"
 )
 
 // Module implements the ClientAPIModule interface for account-related actions
@@ -90,6 +92,9 @@ func (m *Module) Route(r router.Router) error {
 	// create account
 	r.AttachHandler(http.MethodPost, BasePath, m.AccountCreatePOSTHandler)
 
+	// delete account
+	r.AttachHandler(http.MethodPost, DeleteAccountPath, m.AccountDeletePOSTHandler)
+
 	// get account
 	r.AttachHandler(http.MethodGet, BasePathWithID, m.muxHandler)
 
diff --git a/internal/api/client/account/account_test.go b/internal/api/client/account/account_test.go
index 01c8c9599..e214f7f03 100644
--- a/internal/api/client/account/account_test.go
+++ b/internal/api/client/account/account_test.go
@@ -19,7 +19,6 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/media"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 	"github.com/superseriousbusiness/gotosocial/internal/processing"
-	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
 	"github.com/superseriousbusiness/gotosocial/testrig"
 )
 
@@ -27,7 +26,6 @@ type AccountStandardTestSuite struct {
 	// standard suite interfaces
 	suite.Suite
 	db           db.DB
-	tc           typeutils.TypeConverter
 	storage      *kv.KVStore
 	mediaManager media.Manager
 	federator    federation.Federator
diff --git a/internal/api/client/account/accountdelete.go b/internal/api/client/account/accountdelete.go
new file mode 100644
index 000000000..2aae2afa0
--- /dev/null
+++ b/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"})
+}
diff --git a/internal/api/client/account/accountdelete_test.go b/internal/api/client/account/accountdelete_test.go
new file mode 100644
index 000000000..78348eabc
--- /dev/null
+++ b/internal/api/client/account/accountdelete_test.go
@@ -0,0 +1,101 @@
+/*
+   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_test
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/api/client/account"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type AccountDeleteTestSuite struct {
+	AccountStandardTestSuite
+}
+
+func (suite *AccountDeleteTestSuite) TestAccountDeletePOSTHandler() {
+	// set up the request
+	// we're deleting zork
+	requestBody, w, err := testrig.CreateMultipartFormData(
+		"", "",
+		map[string]string{
+			"password": "password",
+		})
+	if err != nil {
+		panic(err)
+	}
+	bodyBytes := requestBody.Bytes()
+	recorder := httptest.NewRecorder()
+	ctx := suite.newContext(recorder, http.MethodPost, bodyBytes, account.DeleteAccountPath, w.FormDataContentType())
+
+	// call the handler
+	suite.accountModule.AccountDeletePOSTHandler(ctx)
+
+	// 1. we should have Accepted because our request was valid
+	suite.Equal(http.StatusAccepted, recorder.Code)
+}
+
+func (suite *AccountDeleteTestSuite) TestAccountDeletePOSTHandlerWrongPassword() {
+	// set up the request
+	// we're deleting zork
+	requestBody, w, err := testrig.CreateMultipartFormData(
+		"", "",
+		map[string]string{
+			"password": "aaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+		})
+	if err != nil {
+		panic(err)
+	}
+	bodyBytes := requestBody.Bytes()
+	recorder := httptest.NewRecorder()
+	ctx := suite.newContext(recorder, http.MethodPost, bodyBytes, account.DeleteAccountPath, w.FormDataContentType())
+
+	// call the handler
+	suite.accountModule.AccountDeletePOSTHandler(ctx)
+
+	// 1. we should have Forbidden because we supplied the wrong password
+	suite.Equal(http.StatusForbidden, recorder.Code)
+}
+
+func (suite *AccountDeleteTestSuite) TestAccountDeletePOSTHandlerNoPassword() {
+	// set up the request
+	// we're deleting zork
+	requestBody, w, err := testrig.CreateMultipartFormData(
+		"", "",
+		map[string]string{})
+	if err != nil {
+		panic(err)
+	}
+	bodyBytes := requestBody.Bytes()
+	recorder := httptest.NewRecorder()
+	ctx := suite.newContext(recorder, http.MethodPost, bodyBytes, account.DeleteAccountPath, w.FormDataContentType())
+
+	// call the handler
+	suite.accountModule.AccountDeletePOSTHandler(ctx)
+
+	// 1. we should have StatusBadRequest because our request was invalid
+	suite.Equal(http.StatusBadRequest, recorder.Code)
+}
+
+func TestAccountDeleteTestSuite(t *testing.T) {
+	suite.Run(t, new(AccountDeleteTestSuite))
+}