[feature] Accept incoming federated Flag activity (#1382)

* start working on handling incoming Flag activity

* interim commit

* federate Flag in successfully

internal/typeutils/util.go

@@ -1,12 +1,39 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2023 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 typeutils
 
 import (
 	"context"
 	"fmt"
+	"net/url"
 
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/regexes"
 )
 
+type statusInteractions struct {
+	Faved      bool
+	Muted      bool
+	Bookmarked bool
+	Reblogged  bool
+}
+
 func (c *converter) interactionsWithStatusForAccount(ctx context.Context, s *gtsmodel.Status, requestingAccount *gtsmodel.Account) (*statusInteractions, error) {
 	si := &statusInteractions{}
 
@@ -38,10 +65,14 @@ func (c *converter) interactionsWithStatusForAccount(ctx context.Context, s *gts
 	return si, nil
 }
 
-// StatusInteractions denotes interactions with a status on behalf of an account.
-type statusInteractions struct {
-	Faved      bool
-	Muted      bool
-	Bookmarked bool
-	Reblogged  bool
+func misskeyReportInlineURLs(content string) []*url.URL {
+	m := regexes.MisskeyReportNotes.FindAllStringSubmatch(content, -1)
+	urls := make([]*url.URL, 0, len(m))
+	for _, sm := range m {
+		url, err := url.Parse(sm[1])
+		if err == nil && url != nil {
+			urls = append(urls, url)
+		}
+	}
+	return urls
 }