chore: initial commit

internal/pkg/messaging/kafka.go

@@ -0,0 +1,48 @@
+// Copyright (C) 2024 Declan Teevan
+//
+// 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 <https://www.gnu.org/licenses/>.
+
+package messaging
+
+import (
+	"context"
+
+	"github.com/twmb/franz-go/pkg/kadm"
+	"github.com/twmb/franz-go/pkg/kgo"
+
+	"github.com/hexolan/stocklet/internal/pkg/config"
+	"github.com/hexolan/stocklet/internal/pkg/errors"
+)
+
+func NewKafkaConn(conf *config.KafkaConfig, opts ...kgo.Opt) (*kgo.Client, error) {
+	opts = append(opts, kgo.SeedBrokers(conf.Brokers...))
+	cl, err := kgo.NewClient(opts...)
+	if err != nil {
+		return nil, errors.WrapServiceError(errors.ErrCodeExtService, "failed to connect to Kafka", err)
+	}
+
+	return cl, nil
+}
+
+func EnsureKafkaTopics(cl *kgo.Client, topics ...string) error {
+	ctx := context.Background()
+	kadmCl := kadm.NewClient(cl)
+
+	_, err := kadmCl.CreateTopics(ctx, -1, -1, nil, topics...)
+	if err != nil {
+		return errors.WrapServiceError(errors.ErrCodeExtService, "failed to create Kafka topics", err)
+	}
+
+	return nil
+}