Implement commenting on issues from Mastodon

models/issues/comment.go

@@ -26,6 +26,7 @@ import (
 	"code.gitea.io/gitea/modules/markup"
 	"code.gitea.io/gitea/modules/markup/markdown"
 	"code.gitea.io/gitea/modules/references"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/timeutil"
 	"code.gitea.io/gitea/modules/util"
@@ -1549,3 +1550,18 @@ func FixCommentTypeLabelWithOutsideLabels() (int64, error) {
 
 	return res.RowsAffected()
 }
+
+func (c *Comment) GetIRI() string {
+	err := c.LoadIssue()
+	if err != nil {
+		return ""
+	}
+	err = c.Issue.LoadRepo(db.DefaultContext)
+	if err != nil {
+		return ""
+	}
+	if strings.Contains(c.Issue.Repo.OwnerName, "@") {
+		return c.OldTitle
+	}
+	return setting.AppURL + "api/v1/activitypub/note/" + c.Issue.Repo.OwnerName + "/" + c.Issue.Repo.Name + "/" + strconv.FormatInt(c.Issue.Index, 10) + "/" + strconv.FormatInt(c.ID, 10)
+}

routers/api/v1/activitypub/create.go

@@ -311,6 +311,7 @@ func createComment(ctx context.Context, note *ap.Note) error {
 		Doer:     user,
 		Repo:     repo,
 		Issue:    issue,
+		OldTitle: note.GetLink().String(),
 		Content:  note.Content.String(),
 	})
 	return err

routers/api/v1/activitypub/person.go

@@ -134,6 +134,14 @@ func PersonInbox(ctx *context.APIContext) {
 		err = follow(ctx, activity)
 	case ap.UndoType:
 		err = unfollow(ctx, activity)
+	case ap.CreateType:
+		// TODO: this is kinda a hack
+		err = ap.OnObject(activity.Object, func(n *ap.Note) error {
+			noteIRI := n.InReplyTo.GetLink().String()
+			noteIRISplit := strings.Split(noteIRI, "/")
+			n.Context = ap.IRI(strings.TrimSuffix(noteIRI, "/"+noteIRISplit[len(noteIRISplit)-1]))
+			return createComment(ctx, n)
+		})
 	default:
 		log.Info("Incoming unsupported ActivityStreams type: %s", activity.GetType())
 		ctx.PlainText(http.StatusNotImplemented, "ActivityStreams type not supported")

services/activitypub/objects.go

@@ -26,8 +26,10 @@ func Note(comment *issues_model.Comment) (*ap.Note, error) {
 	}
 	note := ap.Note{
 		Type:         ap.NoteType,
+		ID:           ap.IRI(comment.GetIRI()),
 		AttributedTo: ap.IRI(comment.Poster.GetIRI()),
 		Context:      ap.IRI(comment.Issue.GetIRI()),
+		To:           ap.ItemCollection{ap.IRI("https://www.w3.org/ns/activitystreams#Public")},
 	}
 	note.Content = ap.NaturalLanguageValuesNew()
 	err = note.Content.Set("en", ap.Content(comment.Content))