feat:wirite ini format

GANG WANG · GANG WANG · commit 077e75d0e902 · 2021-08-17T19:23:12.000+08:00
diff --git a/ini.go b/ini.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
+	"os"
 	"strconv"
 	"strings"
 
@@ -376,11 +377,53 @@ func (this *Ini) DelSection(section string) *Ini {
 
 // TODO: implement Save
 func (this *Ini) Save(filename string) *Ini {
-	return this
-}
 
-// TODO: implement SaveFile
-func (this *Ini) SaveFile(filename string) *Ini {
+	if filename == "" {
+		return this
+	}
+
+	if this.doc == nil {
+		return this
+	}
+
+	var result string
+
+	is_last_type_comment := false
+	for c := this.doc.FirstChild(); c != nil; c = c.NextSibling() {
+		if kv_node, ok := c.(*ast.KVNode); ok {
+			is_last_type_comment = false
+			result = fmt.Sprintf("%s%s = %v\n", result, kv_node.Key.Literal, kv_node.Value.Literal)
+			continue
+		}
+
+		if sect_node, ok := c.(*ast.SetcionNode); ok {
+			is_last_type_comment = false
+			result = fmt.Sprintf("%s[%s]\n", result, sect_node.Name.Literal)
+
+			for c := sect_node.FirstChild(); c != nil; c = c.NextSibling() {
+				if kv_node, ok := c.(*ast.KVNode); ok {
+					result = fmt.Sprintf("%s%s = %v\n", result, kv_node.Key.Literal, kv_node.Value.Literal)
+					continue
+				}
+			}
+
+			continue
+		}
+
+		if comm_node, ok := c.(*ast.CommentNode); ok {
+			if !is_last_type_comment {
+				result = fmt.Sprintf("%s\n", result)
+			}
+
+			is_last_type_comment = true
+			result = fmt.Sprintf("%s%s\n", result, comm_node.Comment.Literal)
+		}
+	}
+
+	os.Remove(filename)
+	var data = []byte(result)
+	this.err = ioutil.WriteFile(filename, data, 0666)
+
 	return this
 }
 
diff --git a/ini_test.go b/ini_test.go
@@ -237,3 +237,25 @@ c=d
 	ini.Dump()
 
 }
+
+func TestIniSave(t *testing.T) {
+	doc := `
+; 123
+c11=d12312312
+# 434
+
+[section]
+k=v
+; dsfads 
+;123
+#3452345
+
+
+[section1]
+k1=v1
+`
+	ini := New().Load([]byte(doc))
+	ini.Dump()
+
+	ini.Save("./save.ini")
+}
diff --git a/save.ini b/save.ini
@@ -0,0 +1,13 @@
+
+; 123
+c11 = d12312312
+
+# 434
+[section]
+k = v
+
+; dsfads 
+;123
+#3452345
+[section1]
+k1 = v1
