feat: tag parsing

entities/field.go

@@ -0,0 +1,8 @@
+package entities
+
+type Field struct {
+	Name string
+	Type string
+	Medatada []Medatada
+}
+

entities/metadata.go

@@ -0,0 +1,31 @@
+package entities
+
+import "strings"
+
+type Medatada struct {
+	Name   string
+	Values []string
+}
+
+func NewMetadata(tag string) *Medatada {
+	tag = strings.TrimSpace(tag)
+	tagName := ""
+	var values []string
+	if strings.Contains(tag, "=") {
+		tagName = tag[:strings.Index(tag, "=")]
+		if tag[strings.Index(tag, "=") + 1] == '[' {
+			values = append(values, strings.Split(tag[strings.Index(tag, "=") + 2:len(tag)-1], ";")...)
+			for i := range values {
+				values[i] = strings.TrimSpace(values[i])
+			}
+		} else {
+			values = append(values, strings.TrimSpace(tag[strings.Index(tag, "=") + 1:]))
+		}
+	} else {
+		tagName = tag
+	}
+	return &Medatada{
+		Name: strings.TrimSpace(strings.ToLower(tagName)),
+		Values: values,
+	}
+}