From 277d90ed066f66ae6db07f39330ca06ee95ec261 Mon Sep 17 00:00:00 2001
From: Gregory Eremin <g@erem.in>
Date: Sat, 29 Aug 2015 13:31:56 +0300
Subject: [PATCH] Add file management functions

---
 file_ops.go | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 file_ops.go

diff --git a/file_ops.go b/file_ops.go
new file mode 100644
index 0000000..5d49797
--- /dev/null
+++ b/file_ops.go
@@ -0,0 +1,53 @@
+package confection2
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"path"
+)
+
+const (
+	dirPerm  = 0755
+	filePerm = 0633
+)
+
+func readFile(file string) ([]byte, error) {
+	if ok := fileExist(file); ok {
+		return ioutil.ReadFile(file)
+	}
+
+	return nil, errors.New("Config file does not exist")
+}
+
+func writeFile(file string, body []byte) error {
+	var fd *os.File
+	var err error
+	if ok := fileExist(file); !ok {
+		if err = mkdirp(file); err != nil {
+			return err
+		}
+		if fd, err = os.Create(file); err != nil {
+			return err
+		}
+	} else if fd, err = os.OpenFile(file, os.O_TRUNC|os.O_WRONLY, filePerm); err != nil {
+		return err
+	}
+	defer fd.Close()
+
+	if _, err := fd.Write(body); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func fileExist(file string) bool {
+	_, err := os.Stat(file)
+	return (err == nil)
+}
+
+func mkdirp(file string) error {
+	dir := path.Dir(file)
+	return os.MkdirAll(dir, dirPerm)
+}