dynamite: Support strings with patterns

packages/dynamite/lib/src/models/schema.dart

@@ -23,6 +23,7 @@ class Schema {
     this.contentMediaType,
     this.contentSchema,
     this.discriminator,
+    this.pattern,
   });
 
   factory Schema.fromJson(final Map<String, dynamic> json) => _$SchemaFromJson(json);
@@ -67,5 +68,7 @@ class Schema {
 
   final Discriminator? discriminator;
 
+  final String? pattern;
+
   bool get isContentString => type == 'string' && (contentMediaType?.isNotEmpty ?? false) && contentSchema != null;
 }

packages/dynamite/lib/src/models/schema.g.dart

@@ -26,7 +26,8 @@ Schema _$SchemaFromJson(Map<String, dynamic> json) {
       'additionalProperties',
       'contentMediaType',
       'contentSchema',
-      'discriminator'
+      'discriminator',
+      'pattern'
     ],
   );
   return Schema(
@@ -51,6 +52,7 @@ Schema _$SchemaFromJson(Map<String, dynamic> json) {
         json['contentSchema'] == null ? null : Schema.fromJson(json['contentSchema'] as Map<String, dynamic>),
     discriminator:
         json['discriminator'] == null ? null : Discriminator.fromJson(json['discriminator'] as Map<String, dynamic>),
+    pattern: json['pattern'] as String?,
   );
 }
 
@@ -80,5 +82,6 @@ Map<String, dynamic> _$SchemaToJson(Schema instance) {
   writeNotNull('contentMediaType', instance.contentMediaType);
   writeNotNull('contentSchema', instance.contentSchema?.toJson());
   writeNotNull('discriminator', instance.discriminator?.toJson());
+  writeNotNull('pattern', instance.pattern);
   return val;
 }

packages/dynamite/lib/src/openapi_builder.dart

@@ -574,6 +574,14 @@ class OpenAPIBuilder implements Builder {
                                 parameter.schema!,
                               );
 
+                              if (result.name == 'String' && parameter.schema?.pattern != null) {
+                                code.write('''
+                                if (!RegExp(r'${parameter.schema!.pattern!}').hasMatch(${_toDartName(parameter.name)})) {
+                                  throw Exception('Invalid value "\$${_toDartName(parameter.name)}" for parameter "${_toDartName(parameter.name)}" with pattern "' r'${parameter.schema!.pattern!}"'); // coverage:ignore-line
+                                }
+                                ''');
+                              }
+
                               final defaultValueCode = parameter.schema?.default_ != null
                                   ? _valueToEscapedValue(result.name, parameter.schema!.default_!.toString())
                                   : null;