server: implement messages and gRPC support for creating messages

server/grpc/message.go

@@ -0,0 +1,72 @@
+package grpc
+
+import (
+	"bytes"
+	"context"
+	"log/slog"
+	"time"
+
+	"git.dubyatp.xyz/dubyatp/scannerbot/server/api"
+	pb "git.dubyatp.xyz/dubyatp/scannerbot/server/proto"
+	"github.com/google/uuid"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+type MessageServer struct {
+	pb.UnimplementedMessageServiceServer
+}
+
+func (s *MessageServer) SendMessage(ctx context.Context, req *pb.SendMessageRequest) (*pb.SendMessageResponse, error) {
+	slog.Debug("grpc: entering SendMessage handler")
+
+	channelID, err := uuid.Parse(req.ChannelId)
+	if err != nil {
+		slog.Error("grpc: invalid channel_id", "error", err)
+		return nil, status.Errorf(codes.InvalidArgument, "invalid channel_id: %v", err)
+	}
+
+	channel, err := api.DBGetChannel(channelID.String())
+	if err != nil {
+		slog.Error("grpc: channel not found", "channelid", channelID, "error", err)
+		return nil, status.Errorf(codes.NotFound, "channel not found")
+	}
+
+	filename := req.AudioFilename
+	if filename == "" {
+		filename = channelID.String() + ".wav"
+	}
+
+	audio, err := api.Store.Save(filename, bytes.NewReader(req.Audio))
+	if err != nil {
+		slog.Error("grpc: failed to save audio file", "error", err)
+		return nil, status.Errorf(codes.Internal, "failed to save audio file")
+	}
+
+	if err := api.DBAddFile(audio); err != nil {
+		slog.Error("grpc: failed to persist audio file record", "error", err)
+		return nil, status.Errorf(codes.Internal, "failed to persist audio file")
+	}
+
+	msg := &api.Message{
+		ID:      uuid.New(),
+		Channel: *channel,
+		Created: time.Now(),
+		Content: req.Content,
+		Audio:   *audio,
+	}
+
+	if err := api.DBAddMessage(msg); err != nil {
+		slog.Error("grpc: failed to persist message", "error", err)
+		return nil, status.Errorf(codes.Internal, "failed to persist message")
+	}
+
+	slog.Debug("grpc: message saved", "messageid", msg.ID, "channelid", channelID)
+	return &pb.SendMessageResponse{
+		Id:        msg.ID.String(),
+		ChannelId: channel.ID.String(),
+		Created:   msg.Created.Format(time.RFC3339),
+		Content:   msg.Content,
+		AudioId:   audio.ID.String(),
+	}, nil
+}