setup interface for file operations

internal/utils/filehandler.go

@@ -0,0 +1,50 @@
+package utils
+
+import (
+	"encoding/json"
+	"os"
+)
+
+
+type AccountFileHandlerInterface interface {
+    EnsureFileExists() error
+    ReadAccountData() (map[string]string, error)
+    WriteAccountData(data map[string]string) error
+}
+
+
+
+type AccountFileHandler2 struct {
+    FilePath string
+}
+
+// Implement the methods required by AccountFileHandlerInterface.
+func (afh *AccountFileHandler2) EnsureFileExists() error {
+	f, err := os.OpenFile(afh.FilePath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+	return f.Close()
+}
+func (afh *AccountFileHandler2) ReadAccountData() (map[string]string, error) { 
+	jsonData, err := os.ReadFile(afh.FilePath)
+	if err != nil {
+		return nil, err
+	}
+
+	var accountData map[string]string
+	err = json.Unmarshal(jsonData, &accountData)
+	if err != nil {
+		return nil, err
+	}
+
+	return accountData, nil
+}
+func (afh *AccountFileHandler2) WriteAccountData(data map[string]string) error { 
+	jsonData, err := json.Marshal(data)
+	if err != nil {
+		return err
+	}
+
+	return os.WriteFile(afh.FilePath, jsonData, 0644)
+}