add sorted map support for the dropdowns

README.md

@@ -61,6 +61,13 @@ There is currently only one template file for all the currently supported templa
             <option value="{{$option.Id}}">{{$option.Name}}</option>
             {{ end }}
         </select>
+        {{ else if eq .Field.Type "dropdownmapped" }}
+        <select {{with .Field.Id}}id="{{.}}"{{end}} name="{{.Field.Name}}" class="text-gray-700 dark:text-gray-200 dark:bg-gray-700 bg-white block w-full rounded-md border border-gray-300 px-3 py-2 shadow-sm focus:border-indigo-500 focus:outline-none focus:ring-indigo-500 sm:text-sm">
+            {{ $value := .Field.Value }}
+            {{ range $k, $option := .Field.Values }}
+            <option value="{{$option.Value}}" {{ if eq $value.String $option.Value }}selected{{ end }} {{ if eq $option.Disabled true }}disabled{{ end }}>{{$option.Name}}</option>
+            {{ end }}
+        </select>
         {{ else if eq .Type "checkbox" }}
         <input {{with .Field.Id}}id="{{.}}"{{end}} name="{{.Field.Name}}" type="checkbox" {{ if eq .Field.Required true }}required{{end}} {{ if eq .Field.Value true }}checked{{end}} class="w-4 h-4 text-blue-600 bg-gray-100 border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600">
         {{ else }}
@@ -99,6 +106,41 @@ func (fe fieldError) FieldError() (field, err string) {
 }
 ```
 
+Support for sorted maps is also included. 
+
+```go
+type CountryListOption struct {
+	Selected     string
+	SortedValues []form.SortedMap
+}
+
+type SortedMap struct {
+	SKey   string
+	SValue string
+}
+
+func (s SortedMap) Key() string   { return s.SKey }
+func (s SortedMap) Value() string { return s.SValue }
+
+func (t *CountryListOption) SortedMapper() []form.SortedMap {
+	return t.SortedValues
+}
+
+func (t *CountryListOption) String() string {
+	return t.Selected
+}
+```
+
+Now in the struct that contains the form you can add the following: 
+
+```go
+UserForm struct {
+    Country *CountryListOption
+}
+```
+
+however the downside is that you create a direct dependancy to the `form.SortedMap` interface.
+
 supported tags
 - label
 - placeholder

transformer.go

@@ -13,11 +13,25 @@ type (
 		Mapper() map[string]string
 		String() string
 	}
+
+	// SortedMapper is new addition to provide sorted key value pairs
+	SortedMapper interface {
+		String() string
+		SortedMapper() []SortedMap
+	}
+
+	SortedMap interface {
+		Key() string
+		Value() string
+	}
 )
 
 var (
 	enumType   = reflect.TypeOf((*Enumerator)(nil)).Elem()
 	mapperType = reflect.TypeOf((*Mapper)(nil)).Elem()
+
+	//new addition to provide sorted key value pairs
+	sortedMapperType = reflect.TypeOf((*SortedMapper)(nil)).Elem()
 )
 
 type Transformer struct {
@@ -117,6 +131,25 @@ func (t *Transformer) scanModel(rValue reflect.Value, rType reflect.Type, names
 			continue
 		}
 
+		//new addition to provide sorted key value pairs
+		if rType.Field(i).Type.Implements(sortedMapperType) {
+			maps := rValue.Field(i).Interface().(SortedMapper).SortedMapper()
+			var fieldValue []FieldValue
+			for _, v := range maps {
+				fieldValue = append(fieldValue, FieldValue{
+					Value:    v.Key(),
+					Name:     v.Value(),
+					Disabled: false,
+				})
+			}
+
+			field.Type = FieldTypeDropdownMapped
+			field.Values = fieldValue
+
+			fields = append(fields, field)
+			continue
+		}
+
 		inputType := InputFieldType(tags.Get("inputType"))
 
 		fType := rType.Field(i).Type