6 files changed, 44 insertions, 51 deletions
diff --git a/model/body.go b/model/body.go
new file mode 100644
index 0000000..b7b4a0c
--- /dev/null
+++ b/model/body.go
@@ -0,0 +1,28 @@
+package model
+
+import (
+	"errors"
+	"fmt"
+)
+
+type Body []any
+
+var ErrInvalidType = errors.New("invalid type")
+
+func (d Body) Execute(v Visitor) error {
+	for _, it := range d {
+		switch it := it.(type) {
+		case *Setting:
+			if err := v.VisitSetting(it.Key, it.Value); err != nil {
+				return err
+			}
+		case *Directive:
+			if err := v.VisitDirective(it.Name, it.Arguments, it.Body); err != nil {
+				return err
+			}
+		default:
+			return fmt.Errorf("%w: %t", ErrInvalidType, it)
+		}
+	}
+	return nil
+}
diff --git a/model/command.go b/model/command.go
deleted file mode 100644
index 237e94f..0000000
--- a/model/command.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package model
-
-type Command struct {
-	Name      string
-	Arguments Values
-	Body      *Doc
-}
-
-type Commands []*Command
diff --git a/model/directive.go b/model/directive.go
new file mode 100644
index 0000000..3852e72
--- /dev/null
+++ b/model/directive.go
@@ -0,0 +1,9 @@
+package model
+
+type Directive struct {
+	Name      string
+	Arguments Values
+	Body      Body
+}
+
+type Directives []*Directive
diff --git a/model/doc.go b/model/doc.go
deleted file mode 100644
index 9c13a4c..0000000
--- a/model/doc.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package model
-
-type Doc struct {
-	items    []any
-	vars     map[string]Values
-	commands map[string]Commands
-}
-
-func New(cap int) *Doc {
-	return &Doc{
-		items:    make([]any, 0, cap),
-		vars:     make(map[string]Values, cap),
-		commands: make(map[string]Commands, cap),
-	}
-}
-
-func (d *Doc) AppendAssignment(e *Assignment) {
-	d.items = append(d.items, e)
-	d.vars[e.Key] = append(d.vars[e.Key], e.Value...)
-}
-
-func (d *Doc) AppendCommand(c *Command) {
-	d.items = append(d.items, c)
-	d.commands[c.Name] = append(d.commands[c.Name], c)
-}
-
-func (d *Doc) Vars() map[string]Values {
-	return d.vars
-}
-
-func (d *Doc) Get(key string) Values {
-	return d.vars[key]
-}
-
-func (d *Doc) Commands(name string) Commands {
-	return d.commands[name]
-}
-
-func (d *Doc) Items() []any {
-	return d.items
-}
diff --git a/model/assignment.go b/model/setting.go
index 746e2b3..363a8a9 100644
--- a/model/assignment.go
+++ b/model/setting.go
@@ -1,6 +1,6 @@
 package model
 
-type Assignment struct {
+type Setting struct {
 	Key   string
 	Value Values
 }
diff --git a/model/visitor.go b/model/visitor.go
new file mode 100644
index 0000000..3f290d3
--- /dev/null
+++ b/model/visitor.go
@@ -0,0 +1,6 @@
+package model
+
+type Visitor interface {
+	VisitDirective(ident string, args Values, body Body) error
+	VisitSetting(key string, values Values) error
+}