Merge pull request #91 from NuruProgramming/fh/add-ability-to-write-files

Fh/add ability to write files

Author: AvicennaJr

evaluator/builtins.go

@@ -90,7 +90,7 @@ var builtins = map[string]*object.Builtin{
 
 			file, err := os.ReadFile(filename)
 			if err != nil {
-				return &object.Error{Message: "Tumeshindwa kusoma faili"}
+				return &object.Error{Message: "Tumeshindwa kusoma faili au faili halipo"}
 			}
 			return &object.File{Filename: filename, Content: string(file)}
 		},

object/file.go

@@ -1,8 +1,12 @@
 package object
 
+import (
+	"os"
+)
+
 type File struct {
 	Filename string
-	Content  string // To read the file
+	Content  string
 }
 
 func (f *File) Type() ObjectType { return FILE_OBJ }
@@ -11,6 +15,10 @@ func (f *File) Method(method string, args []Object) Object {
 	switch method {
 	case "soma":
 		return f.read(args)
+	case "andika":
+		return f.write(args)
+	case "ongeza":
+		return f.append(args)
 	}
 	return nil
 }
@@ -21,3 +29,40 @@ func (f *File) read(args []Object) Object {
 	}
 	return &String{Value: f.Content}
 }
+
+func (f *File) write(args []Object) Object {
+	if len(args) != 1 {
+		return newError("Samahani, tunahitaji Hoja 1, wewe umeweka %d", len(args))
+	}
+	content, ok := args[0].(*String)
+	if !ok {
+		return newError("Samahani, hoja lazima iwe Tungo")
+	}
+	err := os.WriteFile(f.Filename, []byte(content.Value), 0644)
+	if err != nil {
+		return newError("Hitilafu katika kuandika faili: %s", err.Error())
+	}
+	f.Content = content.Value
+	return &Boolean{Value: true}
+}
+
+func (f *File) append(args []Object) Object {
+	if len(args) != 1 {
+		return newError("Samahani, tunahitaji Hoja 1, wewe umeweka %d", len(args))
+	}
+	content, ok := args[0].(*String)
+	if !ok {
+		return newError("Samahani, hoja lazima iwe Tungo")
+	}
+	file, err := os.OpenFile(f.Filename, os.O_APPEND|os.O_WRONLY, 0644)
+	if err != nil {
+		return newError("Hitilafu katika kufungua faili: %s", err.Error())
+	}
+	defer file.Close()
+	_, err = file.WriteString(content.Value)
+	if err != nil {
+		return newError("Hitilafu katika kuongeza kwa faili: %s", err.Error())
+	}
+	f.Content += content.Value
+	return &Boolean{Value: true}
+}