Add Web Push sender (similar to email sender)

internal/webpush/sender.go

@@ -0,0 +1,52 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// 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 webpush
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/superseriousbusiness/gotosocial/internal/filter/usermute"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/httpclient"
+	"github.com/superseriousbusiness/gotosocial/internal/state"
+)
+
+// Sender can send Web Push notifications.
+type Sender interface {
+	// Send queues up a notification for delivery to all of an account's Web Push subscriptions.
+	Send(
+		ctx context.Context,
+		notification *gtsmodel.Notification,
+		filters []*gtsmodel.Filter,
+		mutes *usermute.CompiledUserMuteList,
+	) error
+}
+
+// NewSender creates a new sender from an HTTP client, DB, and worker pool.
+func NewSender(httpClient *httpclient.Client, state *state.State) Sender {
+	return NewRealSender(
+		&http.Client{
+			Transport: &gtsHttpClientRoundTripper{
+				httpClient: httpClient,
+			},
+			// Other fields are already set on the http.Client inside the httpclient.Client.
+		},
+		state,
+	)
+}