feat: initial release

internal/registry/filestorage.go

@@ -0,0 +1,68 @@
+package registry
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path"
+	"sync"
+	"time"
+
+	"git.wzray.com/homelab/mastermind/internal/types"
+)
+
+type FileStorage struct {
+	filename   string
+	lock       sync.Mutex
+}
+
+func NewFileStorage(filename string) *FileStorage {
+	return &FileStorage{
+		filename: filename,
+	}
+}
+
+func (fs *FileStorage) EnsureExists() {
+	dirname := path.Dir(fs.filename)
+	if _, err := os.Stat(dirname); os.IsNotExist(err) {
+		os.MkdirAll(dirname, 0755)
+	}
+
+	if _, err := os.Stat(fs.filename); os.IsNotExist(err) {
+		fs.Save(&storedConfig{
+			LastUpdate: time.Now().UnixMilli(),
+			Nodes: make(map[string]types.Node),
+		})
+	}
+}
+
+func (fs *FileStorage) Save(cfg *storedConfig) error {
+	fs.lock.Lock()
+	defer fs.lock.Unlock()
+
+	buf, err := json.Marshal(cfg)
+	if err != nil {
+		return fmt.Errorf("marshal registry: %w", err)
+	}
+
+	if err := os.WriteFile(fs.filename, buf, 0644); err != nil {
+		return fmt.Errorf("write registry file: %w", err)
+	}
+
+	return nil
+}
+
+func (fs *FileStorage) Load(cfg *storedConfig) error {
+	fs.lock.Lock()
+	defer fs.lock.Unlock()
+
+	data, err := os.ReadFile(fs.filename)
+	if err != nil {
+		return fmt.Errorf("read registry file: %w", err)
+	}
+	if err := json.Unmarshal(data, cfg); err != nil {
+		return fmt.Errorf("unmarshal registry: %w", err)
+	}
+
+	return nil
+}