Adding Cache

internal/api/cache.go

@@ -0,0 +1,52 @@
+package api
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"os"
+	"path/filepath"
+)
+
+type FileCache struct {
+	dir string
+}
+
+func NewFileCache() *FileCache {
+	var cacheDir string
+	userCacheDir, err := os.UserCacheDir()
+	if err == nil {
+		cacheDir = filepath.Join(userCacheDir, "box-box", "openf1")
+	} else {
+		// Fallback to a local .cache directory
+		cacheDir = ".cache/box-box/openf1"
+	}
+
+	// Ensure the cache directory exists
+	_ = os.MkdirAll(cacheDir, 0755)
+
+	return &FileCache{
+		dir: cacheDir,
+	}
+}
+
+func (c *FileCache) getCachePath(key string) string {
+	hash := sha256.Sum256([]byte(key))
+	filename := hex.EncodeToString(hash[:]) + ".json"
+	return filepath.Join(c.dir, filename)
+}
+
+// Get retrieves data from the cache. Returns nil, false if not found.
+func (c *FileCache) Get(key string) ([]byte, bool) {
+	path := c.getCachePath(key)
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, false
+	}
+	return data, true
+}
+
+// Set saves data to the cache.
+func (c *FileCache) Set(key string, data []byte) error {
+	path := c.getCachePath(key)
+	return os.WriteFile(path, data, 0644)
+}