refactor server repo

internal/adapters/data/file/writer.go

@@ -0,0 +1,60 @@
+// Copyright 2025.
+//
+// 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 file
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+
+	"github.com/Adembc/lazyssh/internal/core/domain"
+)
+
+type SSHConfigWriter struct{}
+
+func (w *SSHConfigWriter) Write(writer io.Writer, servers []domain.Server) error {
+	bufWriter := bufio.NewWriter(writer)
+	defer bufWriter.Flush()
+
+	for i, server := range servers {
+		if i > 0 {
+			bufWriter.WriteString("\n")
+		}
+		w.writeServer(bufWriter, server)
+	}
+
+	return nil
+}
+
+func (w *SSHConfigWriter) writeServer(writer *bufio.Writer, server domain.Server) {
+	fmt.Fprintf(writer, "%s\n", ManagedByComment)
+	fmt.Fprintf(writer, "Host %s\n", server.Alias)
+
+	if server.Host != "" {
+		fmt.Fprintf(writer, "    HostName %s\n", server.Host)
+	}
+
+	if server.User != "" {
+		fmt.Fprintf(writer, "    User %s\n", server.User)
+	}
+
+	if server.Port != 0 && server.Port != DefaultPort {
+		fmt.Fprintf(writer, "    Port %d\n", server.Port)
+	}
+
+	if server.Key != "" {
+		fmt.Fprintf(writer, "    IdentityFile %s\n", server.Key)
+	}
+}