use go module for dependencies (#594)

roomserver/input/input.go

@@ -0,0 +1,95 @@
+// Copyright 2017 Vector Creations Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package input contains the code processes new room events
+package input
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"sync"
+
+	"github.com/matrix-org/dendrite/common"
+	"github.com/matrix-org/dendrite/roomserver/api"
+	"github.com/matrix-org/util"
+	sarama "gopkg.in/Shopify/sarama.v1"
+)
+
+// RoomserverInputAPI implements api.RoomserverInputAPI
+type RoomserverInputAPI struct {
+	DB       RoomEventDatabase
+	Producer sarama.SyncProducer
+	// The kafkaesque topic to output new room events to.
+	// This is the name used in kafka to identify the stream to write events to.
+	OutputRoomEventTopic string
+	// Protects calls to processRoomEvent
+	mutex sync.Mutex
+}
+
+// WriteOutputEvents implements OutputRoomEventWriter
+func (r *RoomserverInputAPI) WriteOutputEvents(roomID string, updates []api.OutputEvent) error {
+	messages := make([]*sarama.ProducerMessage, len(updates))
+	for i := range updates {
+		value, err := json.Marshal(updates[i])
+		if err != nil {
+			return err
+		}
+		messages[i] = &sarama.ProducerMessage{
+			Topic: r.OutputRoomEventTopic,
+			Key:   sarama.StringEncoder(roomID),
+			Value: sarama.ByteEncoder(value),
+		}
+	}
+	return r.Producer.SendMessages(messages)
+}
+
+// InputRoomEvents implements api.RoomserverInputAPI
+func (r *RoomserverInputAPI) InputRoomEvents(
+	ctx context.Context,
+	request *api.InputRoomEventsRequest,
+	response *api.InputRoomEventsResponse,
+) (err error) {
+	// We lock as processRoomEvent can only be called once at a time
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+	for i := range request.InputRoomEvents {
+		if response.EventID, err = processRoomEvent(ctx, r.DB, r, request.InputRoomEvents[i]); err != nil {
+			return err
+		}
+	}
+	for i := range request.InputInviteEvents {
+		if err = processInviteEvent(ctx, r.DB, r, request.InputInviteEvents[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// SetupHTTP adds the RoomserverInputAPI handlers to the http.ServeMux.
+func (r *RoomserverInputAPI) SetupHTTP(servMux *http.ServeMux) {
+	servMux.Handle(api.RoomserverInputRoomEventsPath,
+		common.MakeInternalAPI("inputRoomEvents", func(req *http.Request) util.JSONResponse {
+			var request api.InputRoomEventsRequest
+			var response api.InputRoomEventsResponse
+			if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
+				return util.MessageResponse(http.StatusBadRequest, err.Error())
+			}
+			if err := r.InputRoomEvents(req.Context(), &request, &response); err != nil {
+				return util.ErrorResponse(err)
+			}
+			return util.JSONResponse{Code: http.StatusOK, JSON: &response}
+		}),
+	)
+}