Follow request improvements (#282)

* tiny doc update

* add rejectfollowrequest to db

* add follow request reject to processor

* add reject handler

* tidy up follow request api

* tidy up federation call

* regenerate swagger docs

* api endpoint tests

* processor test

* add reject federatingdb handler

* start writing reject tests

* test reject follow request

* go fmt

* increase sleep for slow test setups

* more relaxed time.sleep

internal/federation/federatingdb/reject_test.go

@@ -0,0 +1,96 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 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 federatingdb_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/go-fed/activity/streams"
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/messages"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type RejectTestSuite struct {
+	FederatingDBTestSuite
+}
+
+func (suite *RejectTestSuite) TestRejectFollowRequest() {
+	// local_account_1 sent a follow request to remote_account_2;
+	// remote_account_2 rejects the follow request
+	followingAccount := suite.testAccounts["local_account_1"]
+	followedAccount := suite.testAccounts["remote_account_2"]
+	fromFederatorChan := make(chan messages.FromFederator, 10)
+	ctx := createTestContext(followingAccount, followedAccount, fromFederatorChan)
+
+	// put the follow request in the database
+	fr := &gtsmodel.FollowRequest{
+		ID:              "01FJ1S8DX3STJJ6CEYPMZ1M0R3",
+		CreatedAt:       time.Now(),
+		UpdatedAt:       time.Now(),
+		URI:             util.GenerateURIForFollow(followingAccount.Username, "http", "localhost:8080", "01FJ1S8DX3STJJ6CEYPMZ1M0R3"),
+		AccountID:       followingAccount.ID,
+		TargetAccountID: followedAccount.ID,
+	}
+	err := suite.db.Put(ctx, fr)
+	suite.NoError(err)
+
+	asFollow, err := suite.tc.FollowToAS(ctx, suite.tc.FollowRequestToFollow(ctx, fr), followingAccount, followedAccount)
+	suite.NoError(err)
+
+	rejectingAccountURI := testrig.URLMustParse(followedAccount.URI)
+	requestingAccountURI := testrig.URLMustParse(followingAccount.URI)
+
+	// create a Reject
+	reject := streams.NewActivityStreamsReject()
+
+	// set the rejecting actor on it
+	acceptActorProp := streams.NewActivityStreamsActorProperty()
+	acceptActorProp.AppendIRI(rejectingAccountURI)
+	reject.SetActivityStreamsActor(acceptActorProp)
+
+	// Set the recreated follow as the 'object' property.
+	acceptObject := streams.NewActivityStreamsObjectProperty()
+	acceptObject.AppendActivityStreamsFollow(asFollow)
+	reject.SetActivityStreamsObject(acceptObject)
+
+	// Set the To of the reject as the originator of the follow
+	acceptTo := streams.NewActivityStreamsToProperty()
+	acceptTo.AppendIRI(requestingAccountURI)
+	reject.SetActivityStreamsTo(acceptTo)
+
+	// process the reject in the federating database
+	err = suite.federatingDB.Reject(ctx, reject)
+	suite.NoError(err)
+
+	// there should be nothing in the federator channel since nothing needs to be passed
+	suite.Empty(fromFederatorChan)
+
+	// the follow request should not be in the database anymore -- it's been rejected
+	err = suite.db.GetByID(ctx, fr.ID, &gtsmodel.FollowRequest{})
+	suite.ErrorIs(err, db.ErrNoEntries)
+}
+
+func TestRejectTestSuite(t *testing.T) {
+	suite.Run(t, &RejectTestSuite{})
+}