WIP: initial commit

agent/agent.go

@@ -0,0 +1,72 @@
+package agent
+
+/*
+Copyright 2025 Suyono <suyono3484@gmail.com>
+
+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.
+*/
+
+import (
+	"context"
+	"fmt"
+	"net"
+
+	pb "gitea.suyono.dev/suyono/go-agent/proto"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+type CacheConn struct {
+	conn   *grpc.ClientConn
+	client pb.AgentClient
+}
+
+func NewCacheConn(socketPath string) (CacheConn, error) {
+	var (
+		result CacheConn
+		err    error
+	)
+
+	result.conn, err = grpc.NewClient(
+		socketPath,
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithContextDialer(func(ctx context.Context, addr string) (net.Conn, error) {
+			var d net.Dialer
+			return d.DialContext(ctx, "unix", addr)
+		}),
+	)
+	if err != nil {
+		return result, err
+	}
+
+	result.client = pb.NewAgentClient(result.conn)
+	return result, nil
+}
+
+func (c CacheConn) Get(ctx context.Context, key string) (string, error) {
+	var (
+		rpcResult *pb.CacheValue
+		err       error
+	)
+
+	if rpcResult, err = c.client.Get(ctx, &pb.CacheGetRequest{Key: key}); err != nil {
+		return "", fmt.Errorf("get from cache: %w", err)
+	}
+
+	if rpcResult.Status != "OK" {
+		return "", fmt.Errorf("get from cache: status %s with message %s", rpcResult.Status, rpcResult.Message)
+	}
+
+	return rpcResult.Value, nil
+}