Follow request auto approval (#259)

* start messing about

* fiddle more

* Tests & fiddling

internal/processing/fromclientapi.go

@@ -61,7 +61,7 @@ func (p *processor) ProcessFromClientAPI(ctx context.Context, clientMsg messages
 				return errors.New("followrequest was not parseable as *gtsmodel.FollowRequest")
 			}
 
-			if err := p.notifyFollowRequest(ctx, followRequest, clientMsg.TargetAccount); err != nil {
+			if err := p.notifyFollowRequest(ctx, followRequest); err != nil {
 				return err
 			}
 

internal/processing/fromcommon.go

@@ -109,9 +109,20 @@ func (p *processor) notifyStatus(ctx context.Context, status *gtsmodel.Status) e
 	return nil
 }
 
-func (p *processor) notifyFollowRequest(ctx context.Context, followRequest *gtsmodel.FollowRequest, receivingAccount *gtsmodel.Account) error {
+func (p *processor) notifyFollowRequest(ctx context.Context, followRequest *gtsmodel.FollowRequest) error {
+	// make sure we have the target account pinned on the follow request
+	if followRequest.TargetAccount == nil {
+		a, err := p.db.GetAccountByID(ctx, followRequest.TargetAccountID)
+		if err != nil {
+			return err
+		}
+		followRequest.TargetAccount = a
+	}
+	targetAccount := followRequest.TargetAccount
+
 	// return if this isn't a local account
-	if receivingAccount.Domain != "" {
+	if targetAccount.Domain != "" {
+		// this isn't a local account so we've got nothing to do here
 		return nil
 	}
 
@@ -137,7 +148,7 @@ func (p *processor) notifyFollowRequest(ctx context.Context, followRequest *gtsm
 		return fmt.Errorf("notifyStatus: error converting notification to masto representation: %s", err)
 	}
 
-	if err := p.streamingProcessor.StreamNotificationToAccount(mastoNotif, receivingAccount); err != nil {
+	if err := p.streamingProcessor.StreamNotificationToAccount(mastoNotif, targetAccount); err != nil {
 		return fmt.Errorf("notifyStatus: error streaming notification to account: %s", err)
 	}
 

internal/processing/fromfederator.go

@@ -77,14 +77,45 @@ func (p *processor) ProcessFromFederator(ctx context.Context, federatorMsg messa
 			}
 		case ap.ActivityFollow:
 			// CREATE A FOLLOW REQUEST
-			incomingFollowRequest, ok := federatorMsg.GTSModel.(*gtsmodel.FollowRequest)
+			followRequest, ok := federatorMsg.GTSModel.(*gtsmodel.FollowRequest)
 			if !ok {
 				return errors.New("incomingFollowRequest was not parseable as *gtsmodel.FollowRequest")
 			}
 
-			if err := p.notifyFollowRequest(ctx, incomingFollowRequest, federatorMsg.ReceivingAccount); err != nil {
+			if followRequest.TargetAccount == nil {
+				a, err := p.db.GetAccountByID(ctx, followRequest.TargetAccountID)
+				if err != nil {
 					return err
 				}
+				followRequest.TargetAccount = a
+			}
+			targetAccount := followRequest.TargetAccount
+
+			if targetAccount.Locked {
+				// if the account is locked just notify the follow request and nothing else
+				return p.notifyFollowRequest(ctx, followRequest)
+			}
+
+			if followRequest.Account == nil {
+				a, err := p.db.GetAccountByID(ctx, followRequest.AccountID)
+				if err != nil {
+					return err
+				}
+				followRequest.Account = a
+			}
+			originAccount := followRequest.Account
+
+			// if the target account isn't locked, we should already accept the follow and notify about the new follower instead
+			follow, err := p.db.AcceptFollowRequest(ctx, followRequest.AccountID, followRequest.TargetAccountID)
+			if err != nil {
+				return err
+			}
+
+			if err := p.federateAcceptFollowRequest(ctx, follow, originAccount, targetAccount); err != nil {
+				return err
+			}
+
+			return p.notifyFollow(ctx, follow, targetAccount)
 		case ap.ActivityAnnounce:
 			// CREATE AN ANNOUNCE
 			incomingAnnounce, ok := federatorMsg.GTSModel.(*gtsmodel.Status)
@@ -194,14 +225,7 @@ func (p *processor) ProcessFromFederator(ctx context.Context, federatorMsg messa
 		switch federatorMsg.APObjectType {
 		case ap.ActivityFollow:
 			// ACCEPT A FOLLOW
-			follow, ok := federatorMsg.GTSModel.(*gtsmodel.Follow)
+			// nothing to do here
-			if !ok {
-				return errors.New("follow was not parseable as *gtsmodel.Follow")
-			}
-
-			if err := p.notifyFollow(ctx, follow, federatorMsg.ReceivingAccount); err != nil {
-				return err
-			}
 		}
 	}
 

internal/processing/fromfederator_test.go

@@ -20,12 +20,14 @@ package processing_test
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/suite"
 	"github.com/superseriousbusiness/gotosocial/internal/ap"
+	"github.com/superseriousbusiness/gotosocial/internal/api/model"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/id"
@@ -357,6 +359,133 @@ func (suite *FromFederatorTestSuite) TestProcessAccountDelete() {
 	suite.Equal(dbAccount.ID, dbAccount.SuspensionOrigin)
 }
 
+func (suite *FromFederatorTestSuite) TestProcessFollowRequestLocked() {
+	ctx := context.Background()
+
+	originAccount := suite.testAccounts["remote_account_1"]
+
+	// target is a locked account
+	targetAccount := suite.testAccounts["local_account_2"]
+
+	stream, errWithCode := suite.processor.OpenStreamForAccount(context.Background(), targetAccount, "user")
+	suite.NoError(errWithCode)
+
+	// put the follow request in the database as though it had passed through the federating db already
+	satanFollowRequestTurtle := &gtsmodel.FollowRequest{
+		ID:              "01FGRYAVAWWPP926J175QGM0WV",
+		CreatedAt:       time.Now(),
+		UpdatedAt:       time.Now(),
+		AccountID:       originAccount.ID,
+		Account:         originAccount,
+		TargetAccountID: targetAccount.ID,
+		TargetAccount:   targetAccount,
+		ShowReblogs:     true,
+		URI:             fmt.Sprintf("%s/follows/01FGRYAVAWWPP926J175QGM0WV", originAccount.URI),
+		Notify:          false,
+	}
+
+	err := suite.db.Put(ctx, satanFollowRequestTurtle)
+	suite.NoError(err)
+
+	err = suite.processor.ProcessFromFederator(ctx, messages.FromFederator{
+		APObjectType:     ap.ActivityFollow,
+		APActivityType:   ap.ActivityCreate,
+		GTSModel:         satanFollowRequestTurtle,
+		ReceivingAccount: targetAccount,
+	})
+	suite.NoError(err)
+
+	// a notification should be streamed
+	msg := <-stream.Messages
+	suite.Equal("notification", msg.Event)
+	suite.NotEmpty(msg.Payload)
+	suite.EqualValues([]string{"user"}, msg.Stream)
+	notif := &model.Notification{}
+	err = json.Unmarshal([]byte(msg.Payload), notif)
+	suite.NoError(err)
+	suite.Equal("follow_request", notif.Type)
+	suite.Equal(originAccount.ID, notif.Account.ID)
+
+	// no messages should have been sent out, since we didn't need to federate an accept
+	suite.Empty(suite.sentHTTPRequests)
+}
+
+func (suite *FromFederatorTestSuite) TestProcessFollowRequestUnlocked() {
+	ctx := context.Background()
+
+	originAccount := suite.testAccounts["remote_account_1"]
+
+	// target is an unlocked account
+	targetAccount := suite.testAccounts["local_account_1"]
+
+	stream, errWithCode := suite.processor.OpenStreamForAccount(context.Background(), targetAccount, "user")
+	suite.NoError(errWithCode)
+
+	// put the follow request in the database as though it had passed through the federating db already
+	satanFollowRequestTurtle := &gtsmodel.FollowRequest{
+		ID:              "01FGRYAVAWWPP926J175QGM0WV",
+		CreatedAt:       time.Now(),
+		UpdatedAt:       time.Now(),
+		AccountID:       originAccount.ID,
+		Account:         originAccount,
+		TargetAccountID: targetAccount.ID,
+		TargetAccount:   targetAccount,
+		ShowReblogs:     true,
+		URI:             fmt.Sprintf("%s/follows/01FGRYAVAWWPP926J175QGM0WV", originAccount.URI),
+		Notify:          false,
+	}
+
+	err := suite.db.Put(ctx, satanFollowRequestTurtle)
+	suite.NoError(err)
+
+	err = suite.processor.ProcessFromFederator(ctx, messages.FromFederator{
+		APObjectType:     ap.ActivityFollow,
+		APActivityType:   ap.ActivityCreate,
+		GTSModel:         satanFollowRequestTurtle,
+		ReceivingAccount: targetAccount,
+	})
+	suite.NoError(err)
+
+	// a notification should be streamed
+	msg := <-stream.Messages
+	suite.Equal("notification", msg.Event)
+	suite.NotEmpty(msg.Payload)
+	suite.EqualValues([]string{"user"}, msg.Stream)
+	notif := &model.Notification{}
+	err = json.Unmarshal([]byte(msg.Payload), notif)
+	suite.NoError(err)
+	suite.Equal("follow", notif.Type)
+	suite.Equal(originAccount.ID, notif.Account.ID)
+
+	// an accept message should be sent to satan's inbox
+	suite.Len(suite.sentHTTPRequests, 1)
+	acceptBytes := suite.sentHTTPRequests[originAccount.InboxURI]
+	accept := &struct {
+		Actor  string `json:"actor"`
+		ID     string `json:"id"`
+		Object struct {
+			Actor  string `json:"actor"`
+			ID     string `json:"id"`
+			Object string `json:"object"`
+			To     string `json:"to"`
+			Type   string `json:"type"`
+		}
+		To   string `json:"to"`
+		Type string `json:"type"`
+	}{}
+	err = json.Unmarshal(acceptBytes, accept)
+	suite.NoError(err)
+
+	suite.Equal(targetAccount.URI, accept.Actor)
+	suite.Equal(originAccount.URI, accept.Object.Actor)
+	suite.Equal(satanFollowRequestTurtle.URI, accept.Object.ID)
+	suite.Equal(targetAccount.URI, accept.Object.Object)
+	suite.Equal(targetAccount.URI, accept.Object.To)
+	suite.Equal("Follow", accept.Object.Type)
+	suite.Equal(originAccount.URI, accept.To)
+	suite.Equal("Accept", accept.Type)
+}
+
 func TestFromFederatorTestSuite(t *testing.T) {
 	suite.Run(t, &FromFederatorTestSuite{})
 }

internal/processing/processor_test.go

@@ -19,9 +19,15 @@
 package processing_test
 
 import (
+	"bytes"
 	"context"
+	"encoding/json"
+	"io"
+	"io/ioutil"
+	"net/http"
 
 	"git.iim.gay/grufwub/go-store/kv"
+	"github.com/go-fed/activity/streams"
 	"github.com/sirupsen/logrus"
 	"github.com/stretchr/testify/suite"
 	"github.com/superseriousbusiness/gotosocial/internal/config"
@@ -64,6 +70,8 @@ type ProcessingStandardTestSuite struct {
 	testAutheds      map[string]*oauth.Auth
 	testBlocks       map[string]*gtsmodel.Block
 
+	sentHTTPRequests map[string][]byte
+
 	processor processing.Processor
 }
 
@@ -93,7 +101,62 @@ func (suite *ProcessingStandardTestSuite) SetupTest() {
 	suite.log = testrig.NewTestLog()
 	suite.storage = testrig.NewTestStorage()
 	suite.typeconverter = testrig.NewTestTypeConverter(suite.db)
-	suite.transportController = testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil), suite.db)
+
+	// make an http client that stores POST requests it receives into a map,
+	// and also responds to correctly to dereference requests
+	suite.sentHTTPRequests = make(map[string][]byte)
+	httpClient := testrig.NewMockHTTPClient(func(req *http.Request) (*http.Response, error) {
+		if req.Method == http.MethodPost && req.Body != nil {
+			requestBytes, err := ioutil.ReadAll(req.Body)
+			if err != nil {
+				panic(err)
+			}
+			if err := req.Body.Close(); err != nil {
+				panic(err)
+			}
+			suite.sentHTTPRequests[req.URL.String()] = requestBytes
+		}
+
+		if req.URL.String() == suite.testAccounts["remote_account_1"].URI {
+			// the request is for remote account 1
+			satan := suite.testAccounts["remote_account_1"]
+
+			satanAS, err := suite.typeconverter.AccountToAS(context.Background(), satan)
+			if err != nil {
+				panic(err)
+			}
+
+			satanI, err := streams.Serialize(satanAS)
+			if err != nil {
+				panic(err)
+			}
+			satanJson, err := json.Marshal(satanI)
+			if err != nil {
+				panic(err)
+			}
+			responseType := "application/activity+json"
+
+			reader := bytes.NewReader(satanJson)
+			readCloser := io.NopCloser(reader)
+			response := &http.Response{
+				StatusCode:    200,
+				Body:          readCloser,
+				ContentLength: int64(len(satanJson)),
+				Header: http.Header{
+					"content-type": {responseType},
+				},
+			}
+			return response, nil
+		}
+
+		r := ioutil.NopCloser(bytes.NewReader([]byte{}))
+		return &http.Response{
+			StatusCode: 200,
+			Body:       r,
+		}, nil
+	})
+
+	suite.transportController = testrig.NewTestTransportController(httpClient, suite.db)
 	suite.federator = testrig.NewTestFederator(suite.db, suite.transportController, suite.storage)
 	suite.oauthServer = testrig.NewTestOauthServer(suite.db)
 	suite.mediaHandler = testrig.NewTestMediaHandler(suite.db, suite.storage)