feat: complete leave approval MVP

mobile/lib/core/forms/schema/form_schema.dart

@@ -10,6 +10,17 @@ class DynamicFormDefinition {
 
   final JsonFormSchema dataSchema;
   final FormUiSchema uiSchema;
+
+  factory DynamicFormDefinition.fromJson(Map<String, Object?> json) {
+    return DynamicFormDefinition(
+      dataSchema: JsonFormSchema.fromJson(
+        Map<String, Object?>.from(json['dataSchema']! as Map),
+      ),
+      uiSchema: FormUiSchema.fromJson(
+        Map<String, Object?>.from(json['uiSchema']! as Map),
+      ),
+    );
+  }
 }
 
 class JsonFormSchema {
@@ -24,6 +35,23 @@ class JsonFormSchema {
   final String title;
   final Map<String, JsonFieldSchema> properties;
   final Set<String> required;
+
+  factory JsonFormSchema.fromJson(Map<String, Object?> json) {
+    final properties = Map<String, Object?>.from(json['properties']! as Map);
+    return JsonFormSchema(
+      id: json[r'$id']! as String,
+      title: json['title']! as String,
+      properties: properties.map(
+        (key, value) => MapEntry(
+          key,
+          JsonFieldSchema.fromJson(Map<String, Object?>.from(value as Map)),
+        ),
+      ),
+      required: ((json['required'] as List?) ?? const [])
+          .cast<String>()
+          .toSet(),
+    );
+  }
 }
 
 class JsonFieldSchema {
@@ -40,6 +68,16 @@ class JsonFieldSchema {
   final List<String> enumValues;
   final int? minLength;
   final int? maxLength;
+
+  factory JsonFieldSchema.fromJson(Map<String, Object?> json) {
+    return JsonFieldSchema(
+      type: JsonValueType.values.byName(json['type']! as String),
+      format: json['format'] as String?,
+      enumValues: ((json['enum'] as List?) ?? const []).cast<String>(),
+      minLength: json['minLength'] as int?,
+      maxLength: json['maxLength'] as int?,
+    );
+  }
 }
 
 class FormUiSchema {
@@ -47,6 +85,19 @@ class FormUiSchema {
 
   final String description;
   final List<FormSectionSchema> sections;
+
+  factory FormUiSchema.fromJson(Map<String, Object?> json) {
+    return FormUiSchema(
+      description: json['description']! as String,
+      sections: (json['sections']! as List)
+          .map(
+            (value) => FormSectionSchema.fromJson(
+              Map<String, Object?>.from(value as Map),
+            ),
+          )
+          .toList(),
+    );
+  }
 }
 
 class FormSectionSchema {
@@ -54,6 +105,19 @@ class FormSectionSchema {
 
   final String title;
   final List<FormControlSchema> controls;
+
+  factory FormSectionSchema.fromJson(Map<String, Object?> json) {
+    return FormSectionSchema(
+      title: json['title']! as String,
+      controls: (json['controls']! as List)
+          .map(
+            (value) => FormControlSchema.fromJson(
+              Map<String, Object?>.from(value as Map),
+            ),
+          )
+          .toList(),
+    );
+  }
 }
 
 class FormControlSchema {
@@ -72,21 +136,41 @@ class FormControlSchema {
   final String? placeholder;
   final String? helperText;
   final Map<String, String> optionLabels;
+
+  factory FormControlSchema.fromJson(Map<String, Object?> json) {
+    return FormControlSchema(
+      field: json['field']! as String,
+      label: json['label']! as String,
+      control: FormControlType.values.byName(json['control']! as String),
+      placeholder: json['placeholder'] as String?,
+      helperText: json['helperText'] as String?,
+      optionLabels: ((json['optionLabels'] as Map?) ?? const {})
+          .cast<String, String>(),
+    );
+  }
 }
 
 class DynamicFormState {
-  const DynamicFormState({this.values = const {}, this.errors = const {}});
+  const DynamicFormState({
+    this.values = const {},
+    this.errors = const {},
+    this.restoredAt,
+  });
 
   final Map<String, Object?> values;
   final Map<String, String> errors;
+  final DateTime? restoredAt;
 
   DynamicFormState copyWith({
     Map<String, Object?>? values,
     Map<String, String>? errors,
+    DateTime? restoredAt,
+    bool clearRestoredAt = false,
   }) {
     return DynamicFormState(
       values: values ?? this.values,
       errors: errors ?? this.errors,
+      restoredAt: clearRestoredAt ? null : restoredAt ?? this.restoredAt,
     );
   }
 }