[chore] Deinterface processor and subprocessors (#1501)

* [chore] Deinterface processor and subprocessors

* expose subprocessors via function calls

* missing license header

internal/processing/stream/delete.go

@@ -0,0 +1,56 @@
+/*
+   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 stream
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/superseriousbusiness/gotosocial/internal/stream"
+)
+
+// Delete streams the delete of the given statusID to *ALL* open streams.
+func (p *Processor) Delete(statusID string) error {
+	errs := []string{}
+
+	// get all account IDs with open streams
+	accountIDs := []string{}
+	p.streamMap.Range(func(k interface{}, _ interface{}) bool {
+		key, ok := k.(string)
+		if !ok {
+			panic("streamMap key was not a string (account id)")
+		}
+
+		accountIDs = append(accountIDs, key)
+		return true
+	})
+
+	// stream the delete to every account
+	for _, accountID := range accountIDs {
+		if err := p.toAccount(statusID, stream.EventTypeDelete, stream.AllStatusTimelines, accountID); err != nil {
+			errs = append(errs, err.Error())
+		}
+	}
+
+	if len(errs) != 0 {
+		return fmt.Errorf("one or more errors streaming status delete: %s", strings.Join(errs, ";"))
+	}
+
+	return nil
+}