[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

1 files changed, 90 insertions, 0 deletions

diff --git a/internal/processing/account_test.go b/internal/processing/account_test.go
new file mode 100644
index 000000000..f974f0b9d
--- /dev/null
+++ b/internal/processing/account_test.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 processing_test
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/activity/pub"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+type AccountTestSuite struct {
+	ProcessingStandardTestSuite
+}
+
+func (suite *AccountTestSuite) TestAccountDeleteLocal() {
+	ctx := context.Background()
+	deletingAccount := suite.testAccounts["local_account_1"]
+	followingAccount := suite.testAccounts["remote_account_1"]
+
+	// make the following account follow the deleting account so that a delete message will be sent to it via the federating API
+	follow := &gtsmodel.Follow{
+		ID:              "01FJ1S8DX3STJJ6CEYPMZ1M0R3",
+		CreatedAt:       time.Now(),
+		UpdatedAt:       time.Now(),
+		URI:             fmt.Sprintf("%s/follow/01FJ1S8DX3STJJ6CEYPMZ1M0R3", followingAccount.URI),
+		AccountID:       followingAccount.ID,
+		TargetAccountID: deletingAccount.ID,
+	}
+	err := suite.db.Put(ctx, follow)
+	suite.NoError(err)
+
+	errWithCode := suite.processor.AccountDeleteLocal(ctx, suite.testAutheds["local_account_1"], &apimodel.AccountDeleteRequest{
+		Password:       "password",
+		DeleteOriginID: deletingAccount.ID,
+	})
+	suite.NoError(errWithCode)
+	time.Sleep(1 * time.Second) // wait a sec for the delete to process
+
+	// the delete should be federated outwards to the following account's inbox
+	sent, ok := suite.sentHTTPRequests[followingAccount.InboxURI]
+	suite.True(ok)
+	delete := &struct {
+		Actor  string `json:"actor"`
+		ID     string `json:"id"`
+		Object string `json:"object"`
+		To     string `json:"to"`
+		CC     string `json:"cc"`
+		Type   string `json:"type"`
+	}{}
+	err = json.Unmarshal(sent, delete)
+	suite.NoError(err)
+
+	suite.Equal(deletingAccount.URI, delete.Actor)
+	suite.Equal(deletingAccount.URI, delete.Object)
+	suite.Equal(deletingAccount.FollowersURI, delete.To)
+	suite.Equal(pub.PublicActivityPubIRI, delete.CC)
+	suite.Equal("Delete", delete.Type)
+
+	// the deleted account should be deleted
+	dbAccount, err := suite.db.GetAccountByID(ctx, deletingAccount.ID)
+	suite.NoError(err)
+	suite.WithinDuration(dbAccount.SuspendedAt, time.Now(), 30*time.Second)
+}
+
+func TestAccountTestSuite(t *testing.T) {
+	suite.Run(t, &AccountTestSuite{})
+}